diff --git a/.egg-state/brc-history/issue-1907-v2-implement.json b/.egg-state/brc-history/issue-1907-v2-implement.json new file mode 100644 index 0000000000..dd84f880ef --- /dev/null +++ b/.egg-state/brc-history/issue-1907-v2-implement.json @@ -0,0 +1,758 @@ +[ + { + "id": "96552339-d692-43", + "pipeline_id": "issue-1907-v2", + "from_role": "documenter", + "to_role": "all", + "message_type": "CONSENSUS_PROPOSE", + "subject": "Proposal from documenter", + "body": "Documented the gateway's upstream stream-reset resilience in docs/architecture/credential-injection.md: added an 'Upstream Stream Resilience' subsection under 'Gateway Proxy Endpoints' that explains the pre-stream bounded retry (transparent to the SDK) and mid-stream synthetic SSE error-event emission added to proxy_anthropic_messages() for #1907. Includes a comparison table of reset timing vs gateway behavior vs agent-visible effect, rationale for why full stream resumption is unsafe, retry bounds, and how the fix relates to/differs from #1883 and #1873. Also cross-linked the new section from the existing Implementation details bullet list.", + "metadata": { + "payload": { + "summary": "Documented the gateway's upstream stream-reset resilience in docs/architecture/credential-injection.md: added an 'Upstream Stream Resilience' subsection under 'Gateway Proxy Endpoints' that explains the pre-stream bounded retry (transparent to the SDK) and mid-stream synthetic SSE error-event emission added to proxy_anthropic_messages() for #1907. Includes a comparison table of reset timing vs gateway behavior vs agent-visible effect, rationale for why full stream resumption is unsafe, retry bounds, and how the fix relates to/differs from #1883 and #1873. Also cross-linked the new section from the existing Implementation details bullet list.", + "attestation": {}, + "artifacts": [ + "docs/architecture/credential-injection.md" + ], + "risk_considered": "", + "commit_sha": "db72789ee62acce28330beb54f075d51c4ad11d6", + "files_changed": [ + "docs/architecture/credential-injection.md" + ], + "tests_run": [], + "tasks_satisfied": [ + "task-1-1", + "task-1-2" + ] + }, + "version": 1, + "commit_sha": "db72789ee62acce28330beb54f075d51c4ad11d6" + }, + "timestamp": "2026-04-23T05:18:11.117581+00:00", + "phase": "implement" + }, + { + "id": "30dbfc47-e4c3-47", + "pipeline_id": "issue-1907-v2", + "from_role": "reviewer_code", + "to_role": "documenter", + "message_type": "CONSENSUS_ACK", + "subject": "ACK from reviewer_code for documenter", + "body": "\nReviewed commit db72789ee and the resulting docs/architecture/credential-injection.md section. Verified content against the contract tasks (task-1-1 pre-stream retry semantics, task-1-2 mid-stream graceful close behavior) and against the #1907 issue description.\n\n### What I verified\n- New 'Upstream Stream Resilience' section is placed under 'Request Flow' adjacent to the existing /v1/messages description, so readers discover it in the right context.\n- The reset-timing table correctly splits pre-stream (transparent retry, transparent to agent) vs mid-stream (synthetic error SSE frame), which matches the contract division of tasks.\n- Mid-stream row states the four contract requirements \u2014 yield Anthropic-style 'event: error', feed through the accumulator, log.warning with container_id and bytes_seen, preserve finally upstream.close() + _capture_streaming_response \u2014 all in the order the contract specifies.\n- The 'Why not full stream resumption?' paragraph accurately captures the root cause (no Anthropic resume tokens, partial wire orphan, risk of double-charging / interleaved generations). Matches the issue's recommendation.\n- 'Bounded retry' paragraph correctly notes the single-attempt cap and bytes_seen == 0 gate, and routes exhausted failures to the pre-existing ConnectError/TimeoutException/Exception handlers, preserving the 502/504 contracts.\n- Scope paragraph cleanly separates #1907 from #1883 (gateway pod restart) and #1873 (turn-1 wrapper retry). Useful for future triage.\n- Markdown table and anchor link ([Upstream Stream Resilience](#upstream-stream-resilience)) render correctly in GFM.\n- No code change in this commit \u2014 so no risk of behavior regression from the docs PR itself.\n\n### Non-blocking\n- **docs/architecture/credential-injection.md:~68** \u2014 consider listing the structured log event names operators will search on ('upstream_reset_retry' INFO, 'upstream_reset_midstream' WARN). Right now the docs say 'logger.warning records the reset with container_id and bytes_seen' but don't give the event name, so an operator has to read gateway.py to know what to grep dashboards for. Low priority; the coder's gateway/README.md (if updated) may cover this.\n- **docs/architecture/credential-injection.md:~70** \u2014 minor: the mid-stream row mentions 'feed it through the accumulator so the transcript still captures the failure' but doesn't explicitly state the error envelope's JSON shape. If gateway/README.md ends up documenting the exact wire format, a cross-link here would help SDK authors reason about parser changes.\n- **Cross-consistency caveat** \u2014 the docs claim container_id is stamped onto the mid-stream log. That must match the final code; if the coder's implementation omits container_id (as dc835cefa from the prior #1907 branch did), the docs will be wrong and will need a follow-up. I'll catch that during coder review.\n\nRecommending ACK on the docs-only scope. The documented behavior matches the contract; any mismatch with final code is the coder's responsibility to reconcile and I'll flag it there.\n", + "metadata": { + "payload": { + "artifact_references": [ + "db72789ee", + "docs/architecture/credential-injection.md" + ], + "reason": "\nReviewed commit db72789ee and the resulting docs/architecture/credential-injection.md section. Verified content against the contract tasks (task-1-1 pre-stream retry semantics, task-1-2 mid-stream graceful close behavior) and against the #1907 issue description.\n\n### What I verified\n- New 'Upstream Stream Resilience' section is placed under 'Request Flow' adjacent to the existing /v1/messages description, so readers discover it in the right context.\n- The reset-timing table correctly splits pre-stream (transparent retry, transparent to agent) vs mid-stream (synthetic error SSE frame), which matches the contract division of tasks.\n- Mid-stream row states the four contract requirements \u2014 yield Anthropic-style 'event: error', feed through the accumulator, log.warning with container_id and bytes_seen, preserve finally upstream.close() + _capture_streaming_response \u2014 all in the order the contract specifies.\n- The 'Why not full stream resumption?' paragraph accurately captures the root cause (no Anthropic resume tokens, partial wire orphan, risk of double-charging / interleaved generations). Matches the issue's recommendation.\n- 'Bounded retry' paragraph correctly notes the single-attempt cap and bytes_seen == 0 gate, and routes exhausted failures to the pre-existing ConnectError/TimeoutException/Exception handlers, preserving the 502/504 contracts.\n- Scope paragraph cleanly separates #1907 from #1883 (gateway pod restart) and #1873 (turn-1 wrapper retry). Useful for future triage.\n- Markdown table and anchor link ([Upstream Stream Resilience](#upstream-stream-resilience)) render correctly in GFM.\n- No code change in this commit \u2014 so no risk of behavior regression from the docs PR itself.\n\n### Non-blocking\n- **docs/architecture/credential-injection.md:~68** \u2014 consider listing the structured log event names operators will search on ('upstream_reset_retry' INFO, 'upstream_reset_midstream' WARN). Right now the docs say 'logger.warning records the reset with container_id and bytes_seen' but don't give the event name, so an operator has to read gateway.py to know what to grep dashboards for. Low priority; the coder's gateway/README.md (if updated) may cover this.\n- **docs/architecture/credential-injection.md:~70** \u2014 minor: the mid-stream row mentions 'feed it through the accumulator so the transcript still captures the failure' but doesn't explicitly state the error envelope's JSON shape. If gateway/README.md ends up documenting the exact wire format, a cross-link here would help SDK authors reason about parser changes.\n- **Cross-consistency caveat** \u2014 the docs claim container_id is stamped onto the mid-stream log. That must match the final code; if the coder's implementation omits container_id (as dc835cefa from the prior #1907 branch did), the docs will be wrong and will need a follow-up. I'll catch that during coder review.\n\nRecommending ACK on the docs-only scope. The documented behavior matches the contract; any mismatch with final code is the coder's responsibility to reconcile and I'll flag it there.\n" + }, + "version": 1 + }, + "timestamp": "2026-04-23T05:20:19.307283+00:00", + "phase": "implement" + }, + { + "id": "6f5d5c18-6228-46", + "pipeline_id": "issue-1907-v2", + "from_role": "orchestrator", + "to_role": "documenter", + "message_type": "STATUS", + "subject": "All reviewers have ACKed \u2014 ready to confirm", + "body": "All assigned reviewers have ACKed your proposal (version 1). Run `egg-orch consensus confirmed` to confirm.", + "metadata": { + "fully_acked": true, + "version": 1 + }, + "timestamp": "2026-04-23T05:20:19.307304+00:00", + "phase": "implement" + }, + { + "id": "a7f5232c-1c7c-4d", + "pipeline_id": "issue-1907-v2", + "from_role": "coder", + "to_role": "tester", + "message_type": "HANDOFF", + "subject": "Gateway stream-reset impl ready at dc5058a; test patch in agent-outputs", + "body": "Implemented task-1-1 + task-1-2 in gateway/gateway.py (commit dc5058a on egg/issue-1907-v2). Ready for task-1-3 tests.\n\nA ready-to-apply test patch covering all three acceptance cases is at .egg-state/agent-outputs/coder-test-additions-issue-1907.patch (committed as 5a46e8c9):\n\n git apply .egg-state/agent-outputs/coder-test-additions-issue-1907.patch\n\nThe patch extends TestStreamingResponse in tests/gateway/test_anthropic_proxy.py with:\n (a) test_pre_stream_reset_retries_once_and_succeeds - client.send() raises ReadError once, second attempt returns a valid iterator; asserts send called 2x and downstream sees clean 200 SSE\n (b) test_pre_stream_first_chunk_reset_retries_and_succeeds - first iter_bytes() yields nothing and raises ReadError; asserts retry re-primes and produces normal stream\n (c) test_mid_stream_reset_emits_synthetic_error_frame - iter_bytes yields one chunk then raises RemoteProtocolError; asserts downstream body contains original chunk followed by well-formed 'event: error' SSE frame and stream closes without exception\n\nAll 49 tests in test_anthropic_proxy.py pass locally (pytest tests/gateway/test_anthropic_proxy.py). Feel free to adjust phrasing or add coverage - the patch is meant as a fast path to task-1-3 acceptance, not a mandate.", + "metadata": {}, + "timestamp": "2026-04-23T05:20:47.683791+00:00", + "phase": "implement" + }, + { + "id": "22570e76-b7b4-42", + "pipeline_id": "issue-1907-v2", + "from_role": "coder", + "to_role": "all", + "message_type": "CONSENSUS_PROPOSE", + "subject": "Proposal from coder", + "body": "Gateway proxy_anthropic_messages() is now resilient to upstream Anthropic TCP resets on /v1/messages streaming requests. (A) Pre-stream resets from client.send() or the first iter_bytes() call are retried once transparently so the downstream Claude SDK sees a clean 200 response. (B) Mid-stream resets are caught inside generate(), emitted as a well-formed Anthropic-style 'event: error' SSE frame, and fed through _SSEAccumulator so transcript capture still records the failed turn. upstream.close() and _capture_streaming_response() still run via finally. Covers tasks task-1-1 and task-1-2. task-1-3 (tests) handed off to tester via HANDOFF message a7f5232c with a ready-to-apply patch at .egg-state/agent-outputs/coder-test-additions-issue-1907.patch; all three tests + existing streaming tests pass locally (pytest tests/gateway/test_anthropic_proxy.py -> 49 passed). Linted clean (ruff).", + "metadata": { + "payload": { + "summary": "Gateway proxy_anthropic_messages() is now resilient to upstream Anthropic TCP resets on /v1/messages streaming requests. (A) Pre-stream resets from client.send() or the first iter_bytes() call are retried once transparently so the downstream Claude SDK sees a clean 200 response. (B) Mid-stream resets are caught inside generate(), emitted as a well-formed Anthropic-style 'event: error' SSE frame, and fed through _SSEAccumulator so transcript capture still records the failed turn. upstream.close() and _capture_streaming_response() still run via finally. Covers tasks task-1-1 and task-1-2. task-1-3 (tests) handed off to tester via HANDOFF message a7f5232c with a ready-to-apply patch at .egg-state/agent-outputs/coder-test-additions-issue-1907.patch; all three tests + existing streaming tests pass locally (pytest tests/gateway/test_anthropic_proxy.py -> 49 passed). Linted clean (ruff).", + "attestation": {}, + "artifacts": [ + "gateway/gateway.py", + ".egg-state/agent-outputs/coder-test-additions-issue-1907.patch" + ], + "risk_considered": "", + "commit_sha": "5a46e8c99a4c4db976fd45afca5eab40dd940718", + "files_changed": [ + "gateway/gateway.py", + ".egg-state/agent-outputs/coder-test-additions-issue-1907.patch" + ], + "tests_run": [ + "tests/gateway/test_anthropic_proxy.py::TestStreamingResponse::test_streaming_request_detected", + "tests/gateway/test_anthropic_proxy.py::TestStreamingResponse::test_streaming_content_type_forwarded", + "tests/gateway/test_anthropic_proxy.py::TestStreamingResponse::test_pre_stream_reset_retries_once_and_succeeds", + "tests/gateway/test_anthropic_proxy.py::TestStreamingResponse::test_pre_stream_first_chunk_reset_retries_and_succeeds", + "tests/gateway/test_anthropic_proxy.py::TestStreamingResponse::test_mid_stream_reset_emits_synthetic_error_frame" + ], + "tasks_satisfied": [ + "task-1-1", + "task-1-2" + ] + }, + "version": 1, + "commit_sha": "5a46e8c99a4c4db976fd45afca5eab40dd940718" + }, + "timestamp": "2026-04-23T05:21:06.107990+00:00", + "phase": "implement" + }, + { + "id": "834412fc-ced2-44", + "pipeline_id": "issue-1907-v2", + "from_role": "reviewer_contract", + "to_role": "coder", + "message_type": "CONSENSUS_ACK", + "subject": "ACK from reviewer_contract for coder", + "body": "\n### Criterion-by-criterion contract verification\n\nReviewed coder commits dc5058ad5 (gateway fix) and 5a46e8c99 (test handoff patch) against the three tasks in .egg-state/contracts/issue-1907-v2.json.\n\n**[task-1-1] Pre-stream retry \u2014 VERIFIED**\n- gateway/gateway.py:5261-5292 defines `_send_and_prime()` which calls `client.build_request` + `client.send(http_req, stream=True)`, then immediately calls `upstream_resp.iter_bytes()` and `next(iterator)` to pre-fetch the first chunk. Any `httpx.ReadError` / `httpx.RemoteProtocolError` from either client.send() or the first next() is caught; the failed upstream is closed (`upstream_resp.close()`); the exception is re-raised for the outer retry loop.\n- gateway/gateway.py:5297-5312 wraps this in `for attempt in range(2)` \u2014 attempt 0 logs 'Upstream Anthropic connection reset before any byte was forwarded; retrying once' and continues; attempt 1 re-raises, falling through to the existing `except Exception` handler at line 5455 which returns a 502. This matches the contract requirement 'On second failure, fall through to the existing error-return path'.\n- Retry is bounded to exactly one (`range(2)` = attempts 0 and 1). The request is fully rebuilt each attempt (`_send_and_prime` calls `client.build_request` anew), so a stale connection-pool entry cannot carry over.\n\n**[task-1-2] Mid-stream synthetic SSE error \u2014 VERIFIED**\n- gateway/gateway.py:5347-5385 wraps the downstream-yield portion of `generate()` in `try/except (httpx.ReadError, httpx.RemoteProtocolError)`. The try block yields `first_chunk` (if not None) then iterates `primed_iterator`. On catch, it logs a warning with `container_id` and `bytes_seen` (both required by the task), builds an Anthropic-style payload `{\"type\": \"error\", \"error\": {\"type\": \"api_error\", \"message\": \"upstream connection reset\"}}`, encodes as `b\"event: error\\ndata: \\n\\n\"`, feeds it through `_consume_chunk` (so the accumulator captures it), and yields it to downstream before returning cleanly.\n- The shape matches what `_SSEAccumulator._process_event` handles at gateway.py:5114 (event_type == 'error'), so transcript capture round-trips the synthetic frame correctly.\n- The original `finally: upstream.close()` + `_capture_streaming_response` block at lines 5386-5401 is preserved unchanged, so mid-stream reset still runs both.\n- No retry on mid-stream \u2014 correct per the contract (Anthropic has no resume tokens; retrying after bytes have flowed would be unsafe).\n\n**[task-1-3] Three new tests in tests/gateway/test_anthropic_proxy.py \u2014 PENDING (tester hand-off)**\n- The coder did NOT modify `tests/gateway/test_anthropic_proxy.py`; the commit message states 'tests/ is outside coder's file boundary' and delivers the three tests as `.egg-state/agent-outputs/coder-test-additions-issue-1907.patch` for the tester role to apply.\n- The patch content itself satisfies the acceptance criteria:\n - (a) `test_pre_stream_reset_retries_once_and_succeeds` (patch L18-69): mocks `client.send.side_effect = [ReadError, good_response]`, asserts `send.call_count == 2`, `build_request.call_count == 2`, downstream body has both SSE events and no `event: error`.\n - (b) `test_pre_stream_first_chunk_reset_retries_and_succeeds` (patch L71-125): first response's iter_bytes raises ReadError on first next; second response streams normally. Asserts send twice, `bad_response.close.assert_called()`, downstream clean.\n - (c) `test_mid_stream_reset_emits_synthetic_error_frame` (patch L127-179): iterator yields one chunk then raises `httpx.RemoteProtocolError`. Asserts send once (no retry), status 200, body contains original chunk then `event: error` then `api_error` then `upstream connection reset`, order verified via `data.index(first_chunk) < data.index(b\"event: error\")`, `mock_response.close.assert_called()`.\n- Helper `_raising_iter` (patch L9-16) matches the task's 'small helper to wrap an iterator so it raises after N yielded chunks' requirement.\n- Coder's commit message claims 'All three verified locally against commit dc5058a: pytest tests/gateway/test_anthropic_proxy.py -v -> 49 passed'.\n- **task-1-3 will only be fully satisfied once the tester applies this patch (or writes equivalent tests) into tests/gateway/test_anthropic_proxy.py and CI confirms they pass.** My assigned producer is coder \u2014 this is flagged for the tester's scope, not a block on the coder.\n\n**Phase status consistency**: The contract's `phases[0].status` is still 'pending' and tasks have `status: pending`. Expected \u2014 contract-state updates happen after all producers reach CONFIRMED. No contract-integrity red flags on the coder's output.\n\n### Non-blocking observations\n- gateway/gateway.py:5357 \u2014 catching `(httpx.ReadError, httpx.RemoteProtocolError)` inside the mid-stream try is exactly right, but an unrelated `httpx.NetworkError` from upstream (e.g. a WriteError) would still bubble out of `generate()` as before. Not required by the contract; noting for the record.\n- gateway/gateway.py:5280-5283 \u2014 the inner `try/except StopIteration: first = None` correctly handles an empty upstream body (server returned 200 with zero bytes). Good defensive coding not spelled out in the contract.\n- The `_send_and_prime` helper's `except Exception: pass` around `upstream_resp.close()` (5289-5291) silently swallows any close-error; acceptable since we are about to retry or re-raise the original reset.\n", + "metadata": { + "payload": { + "artifact_references": [ + "gateway/gateway.py", + ".egg-state/agent-outputs/coder-test-additions-issue-1907.patch" + ], + "reason": "\n### Criterion-by-criterion contract verification\n\nReviewed coder commits dc5058ad5 (gateway fix) and 5a46e8c99 (test handoff patch) against the three tasks in .egg-state/contracts/issue-1907-v2.json.\n\n**[task-1-1] Pre-stream retry \u2014 VERIFIED**\n- gateway/gateway.py:5261-5292 defines `_send_and_prime()` which calls `client.build_request` + `client.send(http_req, stream=True)`, then immediately calls `upstream_resp.iter_bytes()` and `next(iterator)` to pre-fetch the first chunk. Any `httpx.ReadError` / `httpx.RemoteProtocolError` from either client.send() or the first next() is caught; the failed upstream is closed (`upstream_resp.close()`); the exception is re-raised for the outer retry loop.\n- gateway/gateway.py:5297-5312 wraps this in `for attempt in range(2)` \u2014 attempt 0 logs 'Upstream Anthropic connection reset before any byte was forwarded; retrying once' and continues; attempt 1 re-raises, falling through to the existing `except Exception` handler at line 5455 which returns a 502. This matches the contract requirement 'On second failure, fall through to the existing error-return path'.\n- Retry is bounded to exactly one (`range(2)` = attempts 0 and 1). The request is fully rebuilt each attempt (`_send_and_prime` calls `client.build_request` anew), so a stale connection-pool entry cannot carry over.\n\n**[task-1-2] Mid-stream synthetic SSE error \u2014 VERIFIED**\n- gateway/gateway.py:5347-5385 wraps the downstream-yield portion of `generate()` in `try/except (httpx.ReadError, httpx.RemoteProtocolError)`. The try block yields `first_chunk` (if not None) then iterates `primed_iterator`. On catch, it logs a warning with `container_id` and `bytes_seen` (both required by the task), builds an Anthropic-style payload `{\"type\": \"error\", \"error\": {\"type\": \"api_error\", \"message\": \"upstream connection reset\"}}`, encodes as `b\"event: error\\ndata: \\n\\n\"`, feeds it through `_consume_chunk` (so the accumulator captures it), and yields it to downstream before returning cleanly.\n- The shape matches what `_SSEAccumulator._process_event` handles at gateway.py:5114 (event_type == 'error'), so transcript capture round-trips the synthetic frame correctly.\n- The original `finally: upstream.close()` + `_capture_streaming_response` block at lines 5386-5401 is preserved unchanged, so mid-stream reset still runs both.\n- No retry on mid-stream \u2014 correct per the contract (Anthropic has no resume tokens; retrying after bytes have flowed would be unsafe).\n\n**[task-1-3] Three new tests in tests/gateway/test_anthropic_proxy.py \u2014 PENDING (tester hand-off)**\n- The coder did NOT modify `tests/gateway/test_anthropic_proxy.py`; the commit message states 'tests/ is outside coder's file boundary' and delivers the three tests as `.egg-state/agent-outputs/coder-test-additions-issue-1907.patch` for the tester role to apply.\n- The patch content itself satisfies the acceptance criteria:\n - (a) `test_pre_stream_reset_retries_once_and_succeeds` (patch L18-69): mocks `client.send.side_effect = [ReadError, good_response]`, asserts `send.call_count == 2`, `build_request.call_count == 2`, downstream body has both SSE events and no `event: error`.\n - (b) `test_pre_stream_first_chunk_reset_retries_and_succeeds` (patch L71-125): first response's iter_bytes raises ReadError on first next; second response streams normally. Asserts send twice, `bad_response.close.assert_called()`, downstream clean.\n - (c) `test_mid_stream_reset_emits_synthetic_error_frame` (patch L127-179): iterator yields one chunk then raises `httpx.RemoteProtocolError`. Asserts send once (no retry), status 200, body contains original chunk then `event: error` then `api_error` then `upstream connection reset`, order verified via `data.index(first_chunk) < data.index(b\"event: error\")`, `mock_response.close.assert_called()`.\n- Helper `_raising_iter` (patch L9-16) matches the task's 'small helper to wrap an iterator so it raises after N yielded chunks' requirement.\n- Coder's commit message claims 'All three verified locally against commit dc5058a: pytest tests/gateway/test_anthropic_proxy.py -v -> 49 passed'.\n- **task-1-3 will only be fully satisfied once the tester applies this patch (or writes equivalent tests) into tests/gateway/test_anthropic_proxy.py and CI confirms they pass.** My assigned producer is coder \u2014 this is flagged for the tester's scope, not a block on the coder.\n\n**Phase status consistency**: The contract's `phases[0].status` is still 'pending' and tasks have `status: pending`. Expected \u2014 contract-state updates happen after all producers reach CONFIRMED. No contract-integrity red flags on the coder's output.\n\n### Non-blocking observations\n- gateway/gateway.py:5357 \u2014 catching `(httpx.ReadError, httpx.RemoteProtocolError)` inside the mid-stream try is exactly right, but an unrelated `httpx.NetworkError` from upstream (e.g. a WriteError) would still bubble out of `generate()` as before. Not required by the contract; noting for the record.\n- gateway/gateway.py:5280-5283 \u2014 the inner `try/except StopIteration: first = None` correctly handles an empty upstream body (server returned 200 with zero bytes). Good defensive coding not spelled out in the contract.\n- The `_send_and_prime` helper's `except Exception: pass` around `upstream_resp.close()` (5289-5291) silently swallows any close-error; acceptable since we are about to retry or re-raise the original reset.\n" + }, + "version": 1 + }, + "timestamp": "2026-04-23T05:23:36.870372+00:00", + "phase": "implement" + }, + { + "id": "5b170f39-0a7d-4a", + "pipeline_id": "issue-1907-v2", + "from_role": "reviewer_contract", + "to_role": "all", + "message_type": "CONSENSUS_CONFIRMED", + "subject": "Confirmed by reviewer_contract (pending_acks)", + "body": "Agent reviewer_contract cannot confirm: producers ['tester'] have never proposed (proposal_version == 0). All producers must propose before any agent can confirm consensus.", + "metadata": { + "pending_acks": true + }, + "timestamp": "2026-04-23T05:23:42.744193+00:00", + "phase": "implement" + }, + { + "id": "cb5e833b-c022-46", + "pipeline_id": "issue-1907-v2", + "from_role": "reviewer_code", + "to_role": "coder", + "message_type": "CONSENSUS_ACK", + "subject": "ACK from reviewer_code for coder", + "body": "\nReviewed both coder commits end-to-end: dc5058ad5 (gateway.py code change, +122 -22) and 5a46e8c99 (test hand-off patch for tester role).\n\n### What I verified\n\n**Pre-stream retry loop (task-1-1)**\n- _send_and_prime() correctly encapsulates send + iter_bytes + first-chunk peek. The inner try/except catches ReadError/RemoteProtocolError from iter_bytes()/next(iterator) and closes upstream_resp before re-raising so the retry does not leak the failed connection.\n- ReadError raised from client.send() itself is outside the inner try, so it propagates out of _send_and_prime without hitting the close block \u2014 but that's safe because upstream_resp was never assigned (no leak). Outer retry loop then catches and retries. This matches the 'client.send() raises' scenario in the contract.\n- Outer loop 'for attempt in range(2)' is bounded and has exactly MAX_PRE_STREAM_RETRIES=1 semantics. On attempt=0 ReadError: logs warning, continue. On attempt=1 ReadError: raise re-raises to outer handler.\n- Retry rebuilds the request with the same headers + body (both captured before the loop), so request replay is exact including injected x-api-key / OAuth. No credential re-injection race.\n- ConnectError / TimeoutException from send() propagate past the retry catch and hit their existing 502 / 504 handlers unchanged \u2014 confirmed by reading the outer exception chain at gateway.py:5433-5464.\n\n**Mid-stream graceful close (task-1-2)**\n- generate() wraps 'yield first_chunk + for chunk in primed_iterator' in try/except for (ReadError, RemoteProtocolError). On catch, emits a well-formed SSE envelope (b'event: error\\ndata: {...}\\n\\n') with Anthropic-style 'type: api_error' payload.\n- The synthetic error frame IS fed through _consume_chunk before being yielded, so the _SSEAccumulator parses it as an 'error' event (accumulator recognizes event_type == 'error' at gateway.py:5114 and appends it to _error_blocks with stop_reason='error'). The transcript buffer therefore captures the failed turn.\n- logger.warning carries container_id + bytes_seen + error \u2014 matches the contract's acceptance fields exactly.\n- finally block runs upstream.close() + _capture_streaming_response unchanged; mid-stream error path doesn't bypass transcript capture.\n\n**Test hand-off (task-1-3)**\n- .egg-state/agent-outputs/coder-test-additions-issue-1907.patch adds three tests to TestStreamingResponse covering (a) send()-raises-then-retries, (b) first-iter_bytes()-raises-then-retries, (c) mid-stream RemoteProtocolError \u2192 synthetic error frame. Contract acceptance criteria met.\n- _raising_iter(chunks, error) helper is the N-chunk wrapper the contract asked for.\n- Assertions verify: send.call_count, build_request.call_count, response body contents, bad_response.close() called before retry, absence of 'event: error' on successful retry, presence on mid-stream reset, ordering (first chunk before error frame), mock_response.close() called in finally.\n- json.dumps default separators produce '\"type\": \"api_error\"' (space after colon) \u2014 matches the test's literal assertion b'\"type\": \"api_error\"'. Verified via default json.dumps behavior.\n\n**Safety / correctness checks**\n- Synthetic error frame contains no user-controlled data \u2014 no injection vector.\n- Retry does not amplify load beyond 2x per affected request; no unbounded loop.\n- httpx.ReadError and httpx.RemoteProtocolError are both real symbols (verified at module level, gateway.py:47 imports httpx; RemoteProtocolError is httpx.ProtocolError subclass).\n- _SSEAccumulator.feed() tolerates multi-line frames and accumulates across chunk boundaries; feeding the synthetic frame in one shot is fine.\n- StopIteration on next(iterator) correctly sets first_chunk=None and is handled by 'if first_chunk is not None' guard in generate().\n- Empty first_chunk (b'') falls through to yield b'' which is harmless downstream.\n\n### Non-blocking\n\n- **gateway.py:5312** \u2014 when pre-stream retry exhausts, the ReadError / RemoteProtocolError re-raises into the generic 'except Exception' handler (line 5455-5464), producing message 'Anthropic API proxy error: ...' and HTTP 502. Consider adding a dedicated 'except (httpx.ReadError, httpx.RemoteProtocolError)' handler right before the generic 'except Exception' so operators get 'Anthropic API connection reset: ...' as the error message, and so the retry-exhaustion case emits a distinct log line rather than the generic 'Anthropic API proxy error' exception log. Not blocking \u2014 502 is the correct status and the generic handler does log.\n\n- **gateway.py:5348** \u2014 'nonlocal bytes_seen' inside generate() is unused (bytes_seen is only read there, never assigned). Harmless but misleading. Safe to drop.\n\n- **gateway.py:5303** and **gateway.py:5365** \u2014 log message is a descriptive sentence rather than a structured event name. Operators grepping dashboards for a specific event (e.g. 'upstream_reset_retry' / 'upstream_reset_midstream') will have to match on substrings of the sentence. Consider using short event names as the first positional arg with the descriptive text moved to a 'message=' kwarg, for consistency with other gateway event-style logs. Not blocking; the structured kwargs (container_id, bytes_seen, error) are present, which is the important part.\n\n- **Test hand-off pattern** \u2014 tests live in a patch file under .egg-state/agent-outputs/ rather than in tests/gateway/test_anthropic_proxy.py directly. Tester role is expected to apply it. That's the standard boundary split, but it means task-1-3 isn't fully landed until the tester runs 'git apply'. I'll verify the applied form when the tester proposes.\n\nRecommending ACK. The implementation satisfies both contract tasks (pre-stream retry and mid-stream graceful close), feeds the synthetic frame through the accumulator, logs with container_id + bytes_seen as required, and the finally/close semantics are preserved. The hand-off tests cover the three contract scenarios correctly.\n", + "metadata": { + "payload": { + "artifact_references": [ + "dc5058ad5", + "5a46e8c99", + "gateway/gateway.py", + ".egg-state/agent-outputs/coder-test-additions-issue-1907.patch" + ], + "reason": "\nReviewed both coder commits end-to-end: dc5058ad5 (gateway.py code change, +122 -22) and 5a46e8c99 (test hand-off patch for tester role).\n\n### What I verified\n\n**Pre-stream retry loop (task-1-1)**\n- _send_and_prime() correctly encapsulates send + iter_bytes + first-chunk peek. The inner try/except catches ReadError/RemoteProtocolError from iter_bytes()/next(iterator) and closes upstream_resp before re-raising so the retry does not leak the failed connection.\n- ReadError raised from client.send() itself is outside the inner try, so it propagates out of _send_and_prime without hitting the close block \u2014 but that's safe because upstream_resp was never assigned (no leak). Outer retry loop then catches and retries. This matches the 'client.send() raises' scenario in the contract.\n- Outer loop 'for attempt in range(2)' is bounded and has exactly MAX_PRE_STREAM_RETRIES=1 semantics. On attempt=0 ReadError: logs warning, continue. On attempt=1 ReadError: raise re-raises to outer handler.\n- Retry rebuilds the request with the same headers + body (both captured before the loop), so request replay is exact including injected x-api-key / OAuth. No credential re-injection race.\n- ConnectError / TimeoutException from send() propagate past the retry catch and hit their existing 502 / 504 handlers unchanged \u2014 confirmed by reading the outer exception chain at gateway.py:5433-5464.\n\n**Mid-stream graceful close (task-1-2)**\n- generate() wraps 'yield first_chunk + for chunk in primed_iterator' in try/except for (ReadError, RemoteProtocolError). On catch, emits a well-formed SSE envelope (b'event: error\\ndata: {...}\\n\\n') with Anthropic-style 'type: api_error' payload.\n- The synthetic error frame IS fed through _consume_chunk before being yielded, so the _SSEAccumulator parses it as an 'error' event (accumulator recognizes event_type == 'error' at gateway.py:5114 and appends it to _error_blocks with stop_reason='error'). The transcript buffer therefore captures the failed turn.\n- logger.warning carries container_id + bytes_seen + error \u2014 matches the contract's acceptance fields exactly.\n- finally block runs upstream.close() + _capture_streaming_response unchanged; mid-stream error path doesn't bypass transcript capture.\n\n**Test hand-off (task-1-3)**\n- .egg-state/agent-outputs/coder-test-additions-issue-1907.patch adds three tests to TestStreamingResponse covering (a) send()-raises-then-retries, (b) first-iter_bytes()-raises-then-retries, (c) mid-stream RemoteProtocolError \u2192 synthetic error frame. Contract acceptance criteria met.\n- _raising_iter(chunks, error) helper is the N-chunk wrapper the contract asked for.\n- Assertions verify: send.call_count, build_request.call_count, response body contents, bad_response.close() called before retry, absence of 'event: error' on successful retry, presence on mid-stream reset, ordering (first chunk before error frame), mock_response.close() called in finally.\n- json.dumps default separators produce '\"type\": \"api_error\"' (space after colon) \u2014 matches the test's literal assertion b'\"type\": \"api_error\"'. Verified via default json.dumps behavior.\n\n**Safety / correctness checks**\n- Synthetic error frame contains no user-controlled data \u2014 no injection vector.\n- Retry does not amplify load beyond 2x per affected request; no unbounded loop.\n- httpx.ReadError and httpx.RemoteProtocolError are both real symbols (verified at module level, gateway.py:47 imports httpx; RemoteProtocolError is httpx.ProtocolError subclass).\n- _SSEAccumulator.feed() tolerates multi-line frames and accumulates across chunk boundaries; feeding the synthetic frame in one shot is fine.\n- StopIteration on next(iterator) correctly sets first_chunk=None and is handled by 'if first_chunk is not None' guard in generate().\n- Empty first_chunk (b'') falls through to yield b'' which is harmless downstream.\n\n### Non-blocking\n\n- **gateway.py:5312** \u2014 when pre-stream retry exhausts, the ReadError / RemoteProtocolError re-raises into the generic 'except Exception' handler (line 5455-5464), producing message 'Anthropic API proxy error: ...' and HTTP 502. Consider adding a dedicated 'except (httpx.ReadError, httpx.RemoteProtocolError)' handler right before the generic 'except Exception' so operators get 'Anthropic API connection reset: ...' as the error message, and so the retry-exhaustion case emits a distinct log line rather than the generic 'Anthropic API proxy error' exception log. Not blocking \u2014 502 is the correct status and the generic handler does log.\n\n- **gateway.py:5348** \u2014 'nonlocal bytes_seen' inside generate() is unused (bytes_seen is only read there, never assigned). Harmless but misleading. Safe to drop.\n\n- **gateway.py:5303** and **gateway.py:5365** \u2014 log message is a descriptive sentence rather than a structured event name. Operators grepping dashboards for a specific event (e.g. 'upstream_reset_retry' / 'upstream_reset_midstream') will have to match on substrings of the sentence. Consider using short event names as the first positional arg with the descriptive text moved to a 'message=' kwarg, for consistency with other gateway event-style logs. Not blocking; the structured kwargs (container_id, bytes_seen, error) are present, which is the important part.\n\n- **Test hand-off pattern** \u2014 tests live in a patch file under .egg-state/agent-outputs/ rather than in tests/gateway/test_anthropic_proxy.py directly. Tester role is expected to apply it. That's the standard boundary split, but it means task-1-3 isn't fully landed until the tester runs 'git apply'. I'll verify the applied form when the tester proposes.\n\nRecommending ACK. The implementation satisfies both contract tasks (pre-stream retry and mid-stream graceful close), feeds the synthetic frame through the accumulator, logs with container_id + bytes_seen as required, and the finally/close semantics are preserved. The hand-off tests cover the three contract scenarios correctly.\n" + }, + "version": 1 + }, + "timestamp": "2026-04-23T05:26:21.474811+00:00", + "phase": "implement" + }, + { + "id": "0757bb0d-8016-4f", + "pipeline_id": "issue-1907-v2", + "from_role": "tester", + "to_role": "coder", + "message_type": "CONSENSUS_ACK", + "subject": "ACK from tester for coder", + "body": "\nReviewed gateway/gateway.py changes at dc5058ad5 (proxy_anthropic_messages streaming branch, lines 5241\u20135408) and the handoff test patch at 5a46e8c99. Exercised the new code paths end-to-end with four new pytest cases in tests/gateway/test_anthropic_proxy.py (all 50 tests in the file pass).\n\n### Correctness verification\n- **Task 1-1 (pre-stream retry)**: `_send_and_prime()` cleanly factors out build_request/send/iter_bytes()/next(), wraps only that scope in `except (httpx.ReadError, httpx.RemoteProtocolError)`, closes the failed upstream before re-raising so the caller's retry opens a fresh connection (no half-open sockets leaked to the httpx connection pool). The outer `for attempt in range(2)` loop is bounded to exactly one retry; on attempt==1 the `raise` re-propagates and the outer `except Exception` handler returns 502. StopIteration during prime is translated to `first=None`, so an empty upstream body does not trigger spurious retry. Verified by test_streaming_send_reset_retries_once, test_streaming_first_chunk_reset_retries_once, and test_streaming_send_reset_retry_exhausted_returns_502.\n- **Task 1-2 (mid-stream synthetic error)**: the nested try/except inside `generate()` catches ReadError/RemoteProtocolError raised by either the first_chunk path or the subsequent `for chunk in primed_iterator` iteration. Emits a well-formed Anthropic-style SSE frame (`event: error\\ndata: {\"type\":\"error\",\"error\":{\"type\":\"api_error\",\"message\":\"upstream connection reset\"}}\\n\\n`) that parses as valid JSON and matches the shape the Claude SDK's error handler expects. The frame is fed through `_consume_chunk()` so `_SSEAccumulator` records it (stop_reason='error' branch in _process_event), and the `finally: upstream.close()` + `_capture_streaming_response` postamble still runs. logger.warning carries container_id and bytes_seen. Verified by test_streaming_midstream_reset_yields_synthetic_error_frame with a JSON-parse assertion on the synthetic payload.\n\n### Defensive behaviors confirmed\n- Failed upstream is closed inside `_send_and_prime`'s except before re-raise; retry opens a fresh connection.\n- No downstream duplication of first_chunk (it's yielded once, then the for loop continues the same primed_iterator).\n- Exhaustion falls through to the existing generic exception handler \u2192 502 with api_error payload (not an infinite loop).\n- mypy diff against baseline: 78 errors in both \u2014 no new type errors introduced.\n\n### Non-blocking\n- **gateway/gateway.py:5370** \u2014 the log's `bytes_seen` counter is only advanced by `_consume_chunk` when `accumulator is not None` (i.e., when container_id is set). In no-session requests the log line will always show bytes_seen=0 even if several chunks flowed. Minor \u2014 operator traffic mostly has container_id \u2014 but worth noting if someone later tries to use the log for mid-stream-reset rate analysis on anonymous traffic.\n- **gateway/gateway.py:5281** \u2014 `first = next(iterator)` is assigned inside the inner try, so StopIteration (empty body) returns first=None, which is correct but subtle. A one-line comment noting \"empty-body upstream \u2192 first_chunk is None, for loop is a no-op\" would aid future readers. Existing docstring mentions it; pure polish.\n\nNothing blocking. The implementation is minimal, scoped, well-commented, and matches the contract exactly. Clean ACK.\n", + "metadata": { + "payload": { + "artifact_references": [ + "gateway/gateway.py", + ".egg-state/agent-outputs/coder-test-additions-issue-1907.patch" + ], + "reason": "\nReviewed gateway/gateway.py changes at dc5058ad5 (proxy_anthropic_messages streaming branch, lines 5241\u20135408) and the handoff test patch at 5a46e8c99. Exercised the new code paths end-to-end with four new pytest cases in tests/gateway/test_anthropic_proxy.py (all 50 tests in the file pass).\n\n### Correctness verification\n- **Task 1-1 (pre-stream retry)**: `_send_and_prime()` cleanly factors out build_request/send/iter_bytes()/next(), wraps only that scope in `except (httpx.ReadError, httpx.RemoteProtocolError)`, closes the failed upstream before re-raising so the caller's retry opens a fresh connection (no half-open sockets leaked to the httpx connection pool). The outer `for attempt in range(2)` loop is bounded to exactly one retry; on attempt==1 the `raise` re-propagates and the outer `except Exception` handler returns 502. StopIteration during prime is translated to `first=None`, so an empty upstream body does not trigger spurious retry. Verified by test_streaming_send_reset_retries_once, test_streaming_first_chunk_reset_retries_once, and test_streaming_send_reset_retry_exhausted_returns_502.\n- **Task 1-2 (mid-stream synthetic error)**: the nested try/except inside `generate()` catches ReadError/RemoteProtocolError raised by either the first_chunk path or the subsequent `for chunk in primed_iterator` iteration. Emits a well-formed Anthropic-style SSE frame (`event: error\\ndata: {\"type\":\"error\",\"error\":{\"type\":\"api_error\",\"message\":\"upstream connection reset\"}}\\n\\n`) that parses as valid JSON and matches the shape the Claude SDK's error handler expects. The frame is fed through `_consume_chunk()` so `_SSEAccumulator` records it (stop_reason='error' branch in _process_event), and the `finally: upstream.close()` + `_capture_streaming_response` postamble still runs. logger.warning carries container_id and bytes_seen. Verified by test_streaming_midstream_reset_yields_synthetic_error_frame with a JSON-parse assertion on the synthetic payload.\n\n### Defensive behaviors confirmed\n- Failed upstream is closed inside `_send_and_prime`'s except before re-raise; retry opens a fresh connection.\n- No downstream duplication of first_chunk (it's yielded once, then the for loop continues the same primed_iterator).\n- Exhaustion falls through to the existing generic exception handler \u2192 502 with api_error payload (not an infinite loop).\n- mypy diff against baseline: 78 errors in both \u2014 no new type errors introduced.\n\n### Non-blocking\n- **gateway/gateway.py:5370** \u2014 the log's `bytes_seen` counter is only advanced by `_consume_chunk` when `accumulator is not None` (i.e., when container_id is set). In no-session requests the log line will always show bytes_seen=0 even if several chunks flowed. Minor \u2014 operator traffic mostly has container_id \u2014 but worth noting if someone later tries to use the log for mid-stream-reset rate analysis on anonymous traffic.\n- **gateway/gateway.py:5281** \u2014 `first = next(iterator)` is assigned inside the inner try, so StopIteration (empty body) returns first=None, which is correct but subtle. A one-line comment noting \"empty-body upstream \u2192 first_chunk is None, for loop is a no-op\" would aid future readers. Existing docstring mentions it; pure polish.\n\nNothing blocking. The implementation is minimal, scoped, well-commented, and matches the contract exactly. Clean ACK.\n" + }, + "version": 1 + }, + "timestamp": "2026-04-23T05:26:44.639749+00:00", + "phase": "implement" + }, + { + "id": "ce567672-653b-46", + "pipeline_id": "issue-1907-v2", + "from_role": "orchestrator", + "to_role": "coder", + "message_type": "STATUS", + "subject": "All reviewers have ACKed \u2014 ready to confirm", + "body": "All assigned reviewers have ACKed your proposal (version 1). Run `egg-orch consensus confirmed` to confirm.", + "metadata": { + "fully_acked": true, + "version": 1 + }, + "timestamp": "2026-04-23T05:26:44.639767+00:00", + "phase": "implement" + }, + { + "id": "7786c580-03aa-43", + "pipeline_id": "issue-1907-v2", + "from_role": "coder", + "to_role": "all", + "message_type": "CONSENSUS_CONFIRMED", + "subject": "Confirmed by coder (pending_acks)", + "body": "Agent coder cannot confirm: producers ['tester'] have never proposed (proposal_version == 0). All producers must propose before any agent can confirm consensus.", + "metadata": { + "pending_acks": true + }, + "timestamp": "2026-04-23T05:26:55.150838+00:00", + "phase": "implement" + }, + { + "id": "e3cef6b6-5b5b-43", + "pipeline_id": "issue-1907-v2", + "from_role": "orchestrator", + "to_role": "all", + "message_type": "AGENT_FAILED", + "subject": "Agent coder failed", + "body": "Container exited with code 1", + "metadata": {}, + "timestamp": "2026-04-23T05:27:42.115094+00:00", + "phase": "implement" + }, + { + "id": "16cbfb6c-8cc0-43", + "pipeline_id": "issue-1907-v2", + "from_role": "orchestrator", + "to_role": "all", + "message_type": "OVERSEER_ALERT", + "subject": "overseer_restart: overseer [info]", + "body": "Overseer container was respawned. Old container 2a098b4c-bc4 exited with code 1. New container 3c43e0dd-b4f is now running.", + "metadata": { + "exit_code": 1, + "old_container_id": "2a098b4c-bc45-4d73-ba0a-1edcd49e6053", + "new_container_id": "3c43e0dd-b4f8-423e-92bf-f98417a211dc", + "log_tail": "2026-04-23 05:25:45 [INFO ] egg-agent: Tool result event_type=tool_result tool_use_id=toolu_01FwPHxywtMFC6H55fCcctMw is_error=False content=\"{\\\"cycle\\\": 1, \\\"ts\\\": \\\"2026-04-23T05:25:45.854088+00:00\\\", \\\"status\\\": \\\"running\\\", \\\"...\" [/opt/egg-runtime/shared/egg_agent/client.py:291]\n2026-04-23 05:25:50 [INFO ] egg-agent: Assistant message event_type=assistant event_subtype=text text=\"**Cycle 12:** Same state \u2014 tester still `WORKING` (~4.5 min since coder hande...\" [/opt/egg-runtime/shared/egg_agent/client.py:266]\n2026-04-23 05:25:51 [INFO ] egg-agent: Tool call event_type=tool_use tool_name=Bash tool_use_id=toolu_01NCy6HQauhBMVk9Y8oSuvet input=\"{\\\"command\\\": \\\"sleep 60 && python3 /opt/egg-runtime/sandbox/overseer_monitor.py...\" [/opt/egg-runtime/shared/egg_agent/client.py:258]\n2026-04-23 05:26:51 [INFO ] egg-agent: Tool result event_type=tool_result tool_use_id=toolu_01NCy6HQauhBMVk9Y8oSuvet is_error=False content=\"{\\\"cycle\\\": 1, \\\"ts\\\": \\\"2026-04-23T05:26:51.766136+00:00\\\", \\\"status\\\": \\\"running\\\", \\\"...\" [/opt/egg-runtime/shared/egg_agent/client.py:291]\n**Action**: No intervention needed. Tester is actively `WORKING` \u2014 monitoring for tester proposal which will unblock consensus completion.**Cycle 12:** Same state \u2014 tester still `WORKING` (~4.5 min since coder handed off patch). Both reviewers `REVIEWING`. Waiting for tester proposal to unblock consensus.**Cycle 13 \u2014 Small State Progression!**\n- `tester.reviewer_phase` advanced: `WORKING` \u2192 `REVIEWING`\n- `tester.producer_phase` still `WORKING` \u2014 tester is concurrently reviewing other proposals while still implementing their test additions\n- This is valid BRC behavior; tester has dual producer+reviewer roles\n- **Still blocked**: tester must PROPOSE before consensus can complete\n\n2026-04-23 05:27:00 [INFO ] egg-agent: Assistant message event_type=assistant event_subtype=text text=\"**Cycle 13 \u2014 Small State Progression!** - `tester.reviewer_phase` advanced: `...\" [/opt/egg-runtime/shared/egg_agent/client.py:266]\n2026-04-23 05:27:01 [INFO ] egg-agent: Tool call event_type=tool_use tool_name=Bash tool_use_id=toolu_01TAQwgBuW6MD5jPJB4AgmQF input=\"{\\\"command\\\": \\\"sleep 60 && python3 /opt/egg-runtime/sandbox/overseer_monitor.py...\" [/opt/egg-runtime/shared/egg_agent/client.py:258]\n2026-04-23 05:28:01 [INFO ] egg-agent: Tool result event_type=tool_result tool_use_id=toolu_01TAQwgBuW6MD5jPJB4AgmQF is_error=False content=\"{\\\"cycle\\\": 1, \\\"ts\\\": \\\"2026-04-23T05:28:01.390060+00:00\\\", \\\"status\\\": \\\"running\\\", \\\"...\" [/opt/egg-runtime/shared/egg_agent/client.py:291]\n2026-04-23 05:28:03 [INFO ] egg-agent: Assistant message event_type=assistant event_subtype=text text=\"You've hit your limit \u00b7 resets 8am (UTC)\" [/opt/egg-runtime/shared/egg_agent/client.py:266]\n2026-04-23 05:28:03 [INFO ] egg-agent: Agent completed event_type=system event_subtype=result model=claude-sonnet-4-6 session_id=c482e5ac-b5dd-43ea-8632-f7d632e8c616 cost_usd=1.6430545000000003 num_turns=27 duration_ms=828836 success=False error=\"You've hit your limit \u00b7 resets 8am (UTC)\" [/opt/egg-runtime/shared/egg_agent/client.py:317]\nan error occurred during closing of asynchronous generator \nasyncgen: \nRuntimeError: aclose(): asynchronous generator is already running\nYou've hit your limit \u00b7 resets 8am (UTC)\nAll healthy. Continuing to monitor.You've hit your limit \u00b7 resets 8am (UTC)You've hit your limit \u00b7 resets 8am (UTC)", + "respawn_attempt": 1, + "max_respawns": 3 + }, + "timestamp": "2026-04-23T05:28:20.537883+00:00", + "phase": "implement" + }, + { + "id": "2f1d2b77-822e-4b", + "pipeline_id": "issue-1907-v2", + "from_role": "orchestrator", + "to_role": "all", + "message_type": "OVERSEER_ALERT", + "subject": "overseer_restart: overseer [info]", + "body": "Overseer container was respawned. Old container 3c43e0dd-b4f exited with code 1. New container 8dae5a38-e92 is now running.", + "metadata": { + "exit_code": 1, + "old_container_id": "3c43e0dd-b4f8-423e-92bf-f98417a211dc", + "new_container_id": "8dae5a38-e920-4a1b-b010-bf079d6bdaa6", + "log_tail": "2026-04-23 05:28:21 [INFO ] egg-agent: Agent session init event_type=system event_subtype=init model=sonnet cwd= permission_mode=bypassPermissions max_turns=2000 timeout=7200 setting_sources=\"['project', 'user']\" disallowed_tools=[] sdk=claude_agent_sdk [/opt/egg-runtime/shared/egg_agent/client.py:215]\n2026-04-23 05:28:22 [INFO ] egg-agent: Assistant message event_type=assistant event_subtype=text text=\"You've hit your limit \u00b7 resets 8am (UTC)\" [/opt/egg-runtime/shared/egg_agent/client.py:266]\n2026-04-23 05:28:22 [INFO ] egg-agent: Agent completed event_type=system event_subtype=result model= session_id=9ed97b09-9a8f-479f-9c4f-23436ed73246 cost_usd=0 num_turns=1 duration_ms=691 success=False error=\"You've hit your limit \u00b7 resets 8am (UTC)\" [/opt/egg-runtime/shared/egg_agent/client.py:317]\nan error occurred during closing of asynchronous generator \nasyncgen: \nRuntimeError: aclose(): asynchronous generator is already running\nYou've hit your limit \u00b7 resets 8am (UTC)\nYou've hit your limit \u00b7 resets 8am (UTC)You've hit your limit \u00b7 resets 8am (UTC)", + "respawn_attempt": 2, + "max_respawns": 3 + }, + "timestamp": "2026-04-23T05:28:50.760831+00:00", + "phase": "implement" + }, + { + "id": "e21533bb-fb59-44", + "pipeline_id": "issue-1907-v2", + "from_role": "orchestrator", + "to_role": "all", + "message_type": "OVERSEER_ALERT", + "subject": "overseer_restart: overseer [info]", + "body": "Overseer container was respawned. Old container 8dae5a38-e92 exited with code 1. New container ecc33b65-a7b is now running.", + "metadata": { + "exit_code": 1, + "old_container_id": "8dae5a38-e920-4a1b-b010-bf079d6bdaa6", + "new_container_id": "ecc33b65-a7b1-46b0-9c6b-25654bb6038a", + "log_tail": "2026-04-23 05:28:51 [INFO ] egg-agent: Agent session init event_type=system event_subtype=init model=sonnet cwd= permission_mode=bypassPermissions max_turns=2000 timeout=7200 setting_sources=\"['project', 'user']\" disallowed_tools=[] sdk=claude_agent_sdk [/opt/egg-runtime/shared/egg_agent/client.py:215]\n2026-04-23 05:28:52 [INFO ] egg-agent: Assistant message event_type=assistant event_subtype=text text=\"You've hit your limit \u00b7 resets 8am (UTC)\" [/opt/egg-runtime/shared/egg_agent/client.py:266]\n2026-04-23 05:28:52 [INFO ] egg-agent: Agent completed event_type=system event_subtype=result model= session_id=689678d5-0cfe-4625-ac70-0f1f825be180 cost_usd=0 num_turns=1 duration_ms=563 success=False error=\"You've hit your limit \u00b7 resets 8am (UTC)\" [/opt/egg-runtime/shared/egg_agent/client.py:317]\nan error occurred during closing of asynchronous generator \nasyncgen: \nRuntimeError: aclose(): asynchronous generator is already running\nYou've hit your limit \u00b7 resets 8am (UTC)\nYou've hit your limit \u00b7 resets 8am (UTC)You've hit your limit \u00b7 resets 8am (UTC)", + "respawn_attempt": 3, + "max_respawns": 3 + }, + "timestamp": "2026-04-23T05:29:21.244142+00:00", + "phase": "implement" + }, + { + "id": "2acb7ed3-8a00-47", + "pipeline_id": "issue-1907-v2", + "from_role": "orchestrator", + "to_role": "all", + "message_type": "AGENT_FAILED", + "subject": "Agent documenter failed", + "body": "Container exited with code 1", + "metadata": {}, + "timestamp": "2026-04-23T05:31:05.742346+00:00", + "phase": "implement" + }, + { + "id": "276dc5ff-e1fb-49", + "pipeline_id": "issue-1907-v2", + "from_role": "orchestrator", + "to_role": "all", + "message_type": "AGENT_FAILED", + "subject": "Agent reviewer_contract failed", + "body": "Container exited with code 1", + "metadata": {}, + "timestamp": "2026-04-23T05:31:49.181664+00:00", + "phase": "implement" + }, + { + "id": "4258739b-c398-4d", + "pipeline_id": "issue-1907-v2", + "from_role": "orchestrator", + "to_role": "all", + "message_type": "OVERSEER_ALERT", + "subject": "overseer_restart: overseer [info]", + "body": "Overseer container was respawned. Old container 32c5d42d-be4 exited with code 1. New container 0fafc89c-519 is now running.", + "metadata": { + "exit_code": 1, + "old_container_id": "32c5d42d-be41-400e-b87d-8b0ac643014d", + "new_container_id": "0fafc89c-5198-4e1c-9b9d-7a7050d1eff3", + "log_tail": "2026-04-23 05:31:22 [INFO ] egg-agent: Agent session init event_type=system event_subtype=init model=sonnet cwd= permission_mode=bypassPermissions max_turns=2000 timeout=7200 setting_sources=\"['project', 'user']\" disallowed_tools=[] sdk=claude_agent_sdk [/opt/egg-runtime/shared/egg_agent/client.py:215]\n2026-04-23 05:31:22 [INFO ] egg-agent: Assistant message event_type=assistant event_subtype=text text=\"You've hit your limit \u00b7 resets 8am (UTC)\" [/opt/egg-runtime/shared/egg_agent/client.py:266]\n2026-04-23 05:31:22 [INFO ] egg-agent: Agent completed event_type=system event_subtype=result model= session_id=df3bb442-09fd-4259-84ee-5591848e4f75 cost_usd=0 num_turns=1 duration_ms=464 success=False error=\"You've hit your limit \u00b7 resets 8am (UTC)\" [/opt/egg-runtime/shared/egg_agent/client.py:317]\nan error occurred during closing of asynchronous generator \nasyncgen: \nRuntimeError: aclose(): asynchronous generator is already running\nYou've hit your limit \u00b7 resets 8am (UTC)\nYou've hit your limit \u00b7 resets 8am (UTC)You've hit your limit \u00b7 resets 8am (UTC)", + "respawn_attempt": 1, + "max_respawns": 3 + }, + "timestamp": "2026-04-23T05:31:51.328788+00:00", + "phase": "implement" + }, + { + "id": "bd93878f-bd61-44", + "pipeline_id": "issue-1907-v2", + "from_role": "coder", + "to_role": "all", + "message_type": "CONSENSUS_PROPOSE", + "subject": "Proposal from coder", + "body": "Gateway /v1/messages proxy now resilient to upstream Anthropic TCP resets. (A) pre-stream retry: client.send() + first iter_bytes() are wrapped in a bounded 1x retry on httpx.ReadError/RemoteProtocolError \u2014 the upstream is closed and a fresh request reissued so downstream SDK never sees the error (covers stale connection-pool entries, very-early resets). (B) mid-stream synthetic error: if a reset arrives after bytes have already flowed downstream, generate() catches it, logs container_id+bytes_seen, and yields a well-formed Anthropic-style 'event: error' SSE frame so the SDK treats it as a clean API error rather than a truncated socket. The synthetic frame is fed through _SSEAccumulator so transcript capture still records the failed turn; finally: upstream.close() and _capture_streaming_response behavior preserved unchanged. All four streaming-reset tests pass (send reset retry, first-chunk reset retry, mid-stream synthetic error frame, retry-exhausted 502 path); full tests/gateway/test_anthropic_proxy.py suite (50 tests) green. Satisfies contract tasks task-1-1 (pre-stream retry), task-1-2 (mid-stream synthetic error), task-1-3 (three new TestStreamingResponse tests).", + "metadata": { + "payload": { + "summary": "Gateway /v1/messages proxy now resilient to upstream Anthropic TCP resets. (A) pre-stream retry: client.send() + first iter_bytes() are wrapped in a bounded 1x retry on httpx.ReadError/RemoteProtocolError \u2014 the upstream is closed and a fresh request reissued so downstream SDK never sees the error (covers stale connection-pool entries, very-early resets). (B) mid-stream synthetic error: if a reset arrives after bytes have already flowed downstream, generate() catches it, logs container_id+bytes_seen, and yields a well-formed Anthropic-style 'event: error' SSE frame so the SDK treats it as a clean API error rather than a truncated socket. The synthetic frame is fed through _SSEAccumulator so transcript capture still records the failed turn; finally: upstream.close() and _capture_streaming_response behavior preserved unchanged. All four streaming-reset tests pass (send reset retry, first-chunk reset retry, mid-stream synthetic error frame, retry-exhausted 502 path); full tests/gateway/test_anthropic_proxy.py suite (50 tests) green. Satisfies contract tasks task-1-1 (pre-stream retry), task-1-2 (mid-stream synthetic error), task-1-3 (three new TestStreamingResponse tests).", + "attestation": {}, + "artifacts": [ + "gateway/gateway.py", + "tests/gateway/test_anthropic_proxy.py" + ], + "risk_considered": "", + "commit_sha": "dda1f2ad76ecbc08de27ada991a494fd725297d2", + "files_changed": [ + "gateway/gateway.py", + "tests/gateway/test_anthropic_proxy.py" + ], + "tests_run": [ + "tests/gateway/test_anthropic_proxy.py::TestStreamingResponse" + ], + "tasks_satisfied": [ + "task-1-1", + "task-1-2", + "task-1-3" + ] + }, + "version": 1, + "commit_sha": "dda1f2ad76ecbc08de27ada991a494fd725297d2" + }, + "timestamp": "2026-04-23T05:38:00.867680+00:00", + "phase": "implement" + }, + { + "id": "fbc8408d-8134-41", + "pipeline_id": "issue-1907-v2", + "from_role": "reviewer_contract", + "to_role": "coder", + "message_type": "CONSENSUS_ACK", + "subject": "ACK from reviewer_contract for coder", + "body": "\nContract verification review \u2014 cycle 1. All three tasks VERIFIED against their acceptance criteria.\n\n### [task-1-1] Pre-stream bounded (1x) retry \u2014 VERIFIED\nEvidence: gateway/gateway.py:5261-5312.\n- `_send_and_prime()` (5261-5292) builds a fresh request, calls `client.send(..., stream=True)`, then primes `next(iter_bytes())`. Catches `httpx.ReadError`/`httpx.RemoteProtocolError` during either step, closes the failed upstream via `upstream_resp.close()` (5289), and re-raises.\n- Retry loop `for attempt in range(2)` (5297-5312) calls `_send_and_prime()`, breaks on success, and on attempt 0 failure logs a warning with `container_id` and continues; on attempt 1 re-raises to the outer handler which returns 502 (verified by `test_streaming_send_reset_retry_exhausted_returns_502` at tests/gateway/test_anthropic_proxy.py:782).\n- Request is *rebuilt* each attempt (build_request is inside _send_and_prime), not reused \u2014 satisfies the 'rebuild the request' clause.\n- Acceptance clause 'send() ReadError once \u2192 retry succeeds, clean 200 SSE' verified by `test_streaming_send_reset_retries_once` (test_anthropic_proxy.py:583): asserts `mock_client.send.call_count == 2`, status 200, body contains message_start+message_stop, no `event: error` frame.\n- Acceptance clause 'first iter_bytes() ReadError \u2192 gateway re-primes, normal stream' verified by `test_streaming_first_chunk_reset_retries_once` (test_anthropic_proxy.py:632): bad_response.iter_bytes returns a generator that raises on first next() pull; retry produces clean stream; `bad_response.close.assert_called()` confirms the failed upstream is released.\n\n### [task-1-2] Mid-stream synthetic SSE error frame \u2014 VERIFIED\nEvidence: gateway/gateway.py:5347-5401.\n- `generate()` wraps the iteration (first_chunk yield + `for chunk in primed_iterator`) in try/except catching `httpx.ReadError` and `httpx.RemoteProtocolError` (5357).\n- On catch: logs `logger.warning` with `container_id` and `bytes_seen` (5365-5371), builds Anthropic-style payload `{type: error, error: {type: api_error, message: 'upstream connection reset'}}` (5372-5378), emits `event: error\\ndata: \\n\\n` frame (5379-5383), feeds it to the accumulator via `_consume_chunk(error_frame)` (5384), yields it (5385), and returns cleanly (no re-raise).\n- The outer `finally:` block (5386-5401) preserving `upstream.close()` and `_capture_streaming_response(...)` is untouched.\n- Acceptance 'original chunk then well-formed event: error frame, stream closes without raising, _capture_streaming_response still runs' verified by `test_streaming_midstream_reset_yields_synthetic_error_frame` (test_anthropic_proxy.py:693): asserts `first_chunk in body`, `event: error in body`, `body.index(first_chunk) < body.index(event: error)`, `body.endswith(b'\\n\\n')`, parses the payload JSON and checks `payload['type'] == 'error'` and `payload['error']['type'] == 'api_error'`, and asserts `mid_reset_response.close.assert_called()` proving the finally branch ran.\n\n### [task-1-3] Tests in TestStreamingResponse \u2014 VERIFIED\nEvidence: tests/gateway/test_anthropic_proxy.py:569-830.\n- Helper `_iter_then_raise(chunks, exc)` (569-581): yields chunks then raises; empty list raises on first pull (pre-stream reset); N chunks raises on pull N+1 (mid-stream reset). Matches 'small helper to wrap an iterator so it raises after N yielded chunks'.\n- (a) `test_streaming_send_reset_retries_once` (583) \u2014 send() ReadError once then success.\n- (b) `test_streaming_first_chunk_reset_retries_once` (632) \u2014 iter_bytes raises on first pull then retry succeeds.\n- (c) `test_streaming_midstream_reset_yields_synthetic_error_frame` (693) \u2014 RemoteProtocolError after one chunk; body ends with synthetic event: error frame.\n- Bonus: `test_streaming_send_reset_retry_exhausted_returns_502` (782) \u2014 exhaustion returns 502.\n- Ran `pytest tests/gateway/test_anthropic_proxy.py::TestStreamingResponse -v` locally \u2014 6 passed in 0.77s; both pre-existing tests (`test_streaming_request_detected`, `test_streaming_content_type_forwarded`) continue to pass, satisfying the no-regression clause.\n\n### Non-blocking\n- **gateway/gateway.py:5348** \u2014 `nonlocal bytes_seen` in `generate()` is unused (generate never rebinds `bytes_seen`; the mutation happens inside `_consume_chunk`, which has its own nonlocal). Harmless but removable. Does not affect contract verification.\n- **gateway/gateway.py:5294-5296** \u2014 `upstream: Any`, `primed_iterator: Any`, `first_chunk: bytes | None` could be typed as `httpx.Response` / `Iterator[bytes]` for clarity; current `Any` matches the surrounding style so this is optional.\n", + "metadata": { + "payload": { + "artifact_references": [ + "gateway/gateway.py", + "tests/gateway/test_anthropic_proxy.py" + ], + "reason": "\nContract verification review \u2014 cycle 1. All three tasks VERIFIED against their acceptance criteria.\n\n### [task-1-1] Pre-stream bounded (1x) retry \u2014 VERIFIED\nEvidence: gateway/gateway.py:5261-5312.\n- `_send_and_prime()` (5261-5292) builds a fresh request, calls `client.send(..., stream=True)`, then primes `next(iter_bytes())`. Catches `httpx.ReadError`/`httpx.RemoteProtocolError` during either step, closes the failed upstream via `upstream_resp.close()` (5289), and re-raises.\n- Retry loop `for attempt in range(2)` (5297-5312) calls `_send_and_prime()`, breaks on success, and on attempt 0 failure logs a warning with `container_id` and continues; on attempt 1 re-raises to the outer handler which returns 502 (verified by `test_streaming_send_reset_retry_exhausted_returns_502` at tests/gateway/test_anthropic_proxy.py:782).\n- Request is *rebuilt* each attempt (build_request is inside _send_and_prime), not reused \u2014 satisfies the 'rebuild the request' clause.\n- Acceptance clause 'send() ReadError once \u2192 retry succeeds, clean 200 SSE' verified by `test_streaming_send_reset_retries_once` (test_anthropic_proxy.py:583): asserts `mock_client.send.call_count == 2`, status 200, body contains message_start+message_stop, no `event: error` frame.\n- Acceptance clause 'first iter_bytes() ReadError \u2192 gateway re-primes, normal stream' verified by `test_streaming_first_chunk_reset_retries_once` (test_anthropic_proxy.py:632): bad_response.iter_bytes returns a generator that raises on first next() pull; retry produces clean stream; `bad_response.close.assert_called()` confirms the failed upstream is released.\n\n### [task-1-2] Mid-stream synthetic SSE error frame \u2014 VERIFIED\nEvidence: gateway/gateway.py:5347-5401.\n- `generate()` wraps the iteration (first_chunk yield + `for chunk in primed_iterator`) in try/except catching `httpx.ReadError` and `httpx.RemoteProtocolError` (5357).\n- On catch: logs `logger.warning` with `container_id` and `bytes_seen` (5365-5371), builds Anthropic-style payload `{type: error, error: {type: api_error, message: 'upstream connection reset'}}` (5372-5378), emits `event: error\\ndata: \\n\\n` frame (5379-5383), feeds it to the accumulator via `_consume_chunk(error_frame)` (5384), yields it (5385), and returns cleanly (no re-raise).\n- The outer `finally:` block (5386-5401) preserving `upstream.close()` and `_capture_streaming_response(...)` is untouched.\n- Acceptance 'original chunk then well-formed event: error frame, stream closes without raising, _capture_streaming_response still runs' verified by `test_streaming_midstream_reset_yields_synthetic_error_frame` (test_anthropic_proxy.py:693): asserts `first_chunk in body`, `event: error in body`, `body.index(first_chunk) < body.index(event: error)`, `body.endswith(b'\\n\\n')`, parses the payload JSON and checks `payload['type'] == 'error'` and `payload['error']['type'] == 'api_error'`, and asserts `mid_reset_response.close.assert_called()` proving the finally branch ran.\n\n### [task-1-3] Tests in TestStreamingResponse \u2014 VERIFIED\nEvidence: tests/gateway/test_anthropic_proxy.py:569-830.\n- Helper `_iter_then_raise(chunks, exc)` (569-581): yields chunks then raises; empty list raises on first pull (pre-stream reset); N chunks raises on pull N+1 (mid-stream reset). Matches 'small helper to wrap an iterator so it raises after N yielded chunks'.\n- (a) `test_streaming_send_reset_retries_once` (583) \u2014 send() ReadError once then success.\n- (b) `test_streaming_first_chunk_reset_retries_once` (632) \u2014 iter_bytes raises on first pull then retry succeeds.\n- (c) `test_streaming_midstream_reset_yields_synthetic_error_frame` (693) \u2014 RemoteProtocolError after one chunk; body ends with synthetic event: error frame.\n- Bonus: `test_streaming_send_reset_retry_exhausted_returns_502` (782) \u2014 exhaustion returns 502.\n- Ran `pytest tests/gateway/test_anthropic_proxy.py::TestStreamingResponse -v` locally \u2014 6 passed in 0.77s; both pre-existing tests (`test_streaming_request_detected`, `test_streaming_content_type_forwarded`) continue to pass, satisfying the no-regression clause.\n\n### Non-blocking\n- **gateway/gateway.py:5348** \u2014 `nonlocal bytes_seen` in `generate()` is unused (generate never rebinds `bytes_seen`; the mutation happens inside `_consume_chunk`, which has its own nonlocal). Harmless but removable. Does not affect contract verification.\n- **gateway/gateway.py:5294-5296** \u2014 `upstream: Any`, `primed_iterator: Any`, `first_chunk: bytes | None` could be typed as `httpx.Response` / `Iterator[bytes]` for clarity; current `Any` matches the surrounding style so this is optional.\n" + }, + "version": 1 + }, + "timestamp": "2026-04-23T05:39:08.929784+00:00", + "phase": "implement" + }, + { + "id": "af50e030-c79d-4f", + "pipeline_id": "issue-1907-v2", + "from_role": "documenter", + "to_role": "all", + "message_type": "CONSENSUS_PROPOSE", + "subject": "Proposal from documenter", + "body": "Documenter phase complete for #1907. Reviewed the code resilience changes in gateway/gateway.py (pre-stream bounded retry + mid-stream synthetic SSE error-event) and confirmed the existing docs/architecture/credential-injection.md 'Upstream Stream Resilience' section accurately matches the implementation (retry bounded to one attempt, gated on bytes_seen == 0; mid-stream ReadError/RemoteProtocolError catch emits well-formed Anthropic-style event: error frame fed through accumulator; finally upstream.close() preserved; logger.warning with container_id+bytes_seen). Enhanced gateway/README.md to add a cross-reference in the Anthropic Proxy endpoint block and a new Design Decision #11, so readers of the gateway API reference can discover the resilience behavior and jump to the architecture doc. No contract tasks (task-1-1..task-1-3) are owned by documenter; those are coder/tester artifacts. Documentation satisfies the implicit cross-cutting requirement that operator-facing behavior changes are described in the architecture docs.", + "metadata": { + "payload": { + "summary": "Documenter phase complete for #1907. Reviewed the code resilience changes in gateway/gateway.py (pre-stream bounded retry + mid-stream synthetic SSE error-event) and confirmed the existing docs/architecture/credential-injection.md 'Upstream Stream Resilience' section accurately matches the implementation (retry bounded to one attempt, gated on bytes_seen == 0; mid-stream ReadError/RemoteProtocolError catch emits well-formed Anthropic-style event: error frame fed through accumulator; finally upstream.close() preserved; logger.warning with container_id+bytes_seen). Enhanced gateway/README.md to add a cross-reference in the Anthropic Proxy endpoint block and a new Design Decision #11, so readers of the gateway API reference can discover the resilience behavior and jump to the architecture doc. No contract tasks (task-1-1..task-1-3) are owned by documenter; those are coder/tester artifacts. Documentation satisfies the implicit cross-cutting requirement that operator-facing behavior changes are described in the architecture docs.", + "attestation": {}, + "artifacts": [ + "docs/architecture/credential-injection.md", + "gateway/README.md" + ], + "risk_considered": "", + "commit_sha": "0a4e87643761aa6d24008168aafdf01eae748f44", + "files_changed": [ + "gateway/README.md" + ], + "tests_run": [ + "" + ], + "tasks_satisfied": [ + "" + ] + }, + "version": 1, + "commit_sha": "0a4e87643761aa6d24008168aafdf01eae748f44" + }, + "timestamp": "2026-04-23T05:39:22.937384+00:00", + "phase": "implement" + }, + { + "id": "c4cd2735-7051-4c", + "pipeline_id": "issue-1907-v2", + "from_role": "reviewer_code", + "to_role": "coder", + "message_type": "CONSENSUS_ACK", + "subject": "ACK from reviewer_code for coder", + "body": "\nReviewed gateway/gateway.py (full diff of proxy_anthropic_messages() streaming branch, lines 5241-5408) plus surrounding helpers (_SSEAccumulator at 5002-5149, _capture_streaming_response at 5151-5196, _filter_response_headers, get_anthropic_client at 4767-4780, and the outer except handlers at 5433-5464). Verified httpx exception inheritance (ReadError and RemoteProtocolError both descend from TransportError\u2192RequestError\u2192HTTPError\u2192Exception) so retry-exhausted cases reach the catch-all Exception handler and surface as 502. Traced data flow end-to-end:\n\n### Correctness (verified)\n1. **Pre-stream prime pattern is sound.** _send_and_prime() calls client.send(..., stream=True) then iter_bytes() then next(iterator) to pull the first chunk eagerly. This is what gates the 'no downstream byte has flowed' invariant \u2014 the retry is only safe because Response() is not constructed until after the prime succeeds. If send() raises, upstream_resp is never bound (correct \u2014 nothing to close). If iter_bytes()/next() raises ReadError/RemoteProtocolError, the inner except closes upstream_resp before re-raising, preventing a half-open conn leaking back into the httpx keepalive pool.\n2. **Bounded retry is correctly bounded.** for attempt in range(2) with a break on success and raise on attempt==1 exhaustion. No risk of infinite loop. Retry-exhausted ReadError/RemoteProtocolError bubble to the except Exception branch \u2192 jsonify({'error': {'type': 'api_error', ...}}), 502 \u2014 matches the existing error contract.\n3. **StopIteration is legally caught.** _send_and_prime() is a regular function, not a generator, so PEP 479 does not apply. An empty upstream body (first=None) correctly no-ops the first-chunk yield in generate() and the for-loop over primed_iterator terminates immediately.\n4. **Iterator handoff is single-owned.** iter_bytes() is called exactly once per upstream response (inside _send_and_prime); next() pulls one chunk; the same iterator object is returned and reused in generate()'s for-loop. No double-iter_bytes() call that would create a second generator on the same already-consumed stream.\n5. **Mid-stream synthetic frame is well-formed.** event: error\\ndata: {JSON}\\n\\n shape matches Anthropic's documented error event and is parsed by _SSEAccumulator._process_event at gateway.py:5114 (produces _error_blocks + stop_reason='error'), so the captured transcript correctly reflects the failed generation. Frame is fed through _consume_chunk before being yielded so the accumulator sees it.\n6. **finally: upstream.close() + _capture_streaming_response preserved.** Runs on success, on mid-stream ReadError, and on mid-stream RemoteProtocolError. Transcript capture still happens on failure \u2014 operators retain visibility into the partial turn.\n7. **Request rebuild on retry is safe.** headers is a resolved dict; request_body is bytes from request.get_data() (Flask caches it). build_request is called fresh inside _send_and_prime on every attempt, so no consumed-stream issue.\n8. **Retry scope is correct.** Only ReadError + RemoteProtocolError trigger the retry. ConnectError (502) and TimeoutException (504) still get their existing dedicated handlers \u2014 no behavior change for non-reset errors.\n\n### Security\n- No new attack surface: synthetic error frame payload is a fixed literal ('upstream connection reset'); no attacker-influenced string is interpolated into the SSE frame.\n- Credential injection path unchanged; headers dict is built once upstream of the retry loop.\n- No log injection: container_id comes from session, error string comes from httpx exception, both pass through logger.warning's structured kwargs (not format string injection).\n\n### Non-blocking observations\n- **gateway.py:5348** 'nonlocal bytes_seen' inside generate() is technically redundant \u2014 generate() only reads bytes_seen (in the warning log's kwargs), never assigns. Harmless, and removing it is a style change only.\n- **gateway.py:5285-5292** The inner try/except in _send_and_prime() only closes upstream_resp on httpx.ReadError/RemoteProtocolError. A non-transport exception at that point (e.g., an AttributeError from a pathological response mock) would leak the streaming connection. In practice this is unreachable for real httpx, but a broader 'except BaseException:' with try/close could be slightly more defensive. Not worth blocking.\n- **gateway.py:5357-5385** The synthetic error frame is counted against MAX_CAPTURE_SIZE via _consume_chunk. If the accumulator is already capture_truncated=True, the synthetic frame is still yielded downstream (correct) but won't appear in the captured transcript \u2014 the transcript will lose the error signal. For a 10MB-truncated capture this is a rare corner, but it means big-response-then-reset turns will not show as error=true in stop_reason. Document or special-case as future work; not blocking.\n- **gateway.py:5381** json.dumps() is called on every mid-stream reset; tiny allocation but could be hoisted to a module-level pre-encoded constant if this path ever becomes hot. Micro-optimization, skip.\n", + "metadata": { + "payload": { + "artifact_references": [ + "gateway/gateway.py", + "dc5058ad5" + ], + "reason": "\nReviewed gateway/gateway.py (full diff of proxy_anthropic_messages() streaming branch, lines 5241-5408) plus surrounding helpers (_SSEAccumulator at 5002-5149, _capture_streaming_response at 5151-5196, _filter_response_headers, get_anthropic_client at 4767-4780, and the outer except handlers at 5433-5464). Verified httpx exception inheritance (ReadError and RemoteProtocolError both descend from TransportError\u2192RequestError\u2192HTTPError\u2192Exception) so retry-exhausted cases reach the catch-all Exception handler and surface as 502. Traced data flow end-to-end:\n\n### Correctness (verified)\n1. **Pre-stream prime pattern is sound.** _send_and_prime() calls client.send(..., stream=True) then iter_bytes() then next(iterator) to pull the first chunk eagerly. This is what gates the 'no downstream byte has flowed' invariant \u2014 the retry is only safe because Response() is not constructed until after the prime succeeds. If send() raises, upstream_resp is never bound (correct \u2014 nothing to close). If iter_bytes()/next() raises ReadError/RemoteProtocolError, the inner except closes upstream_resp before re-raising, preventing a half-open conn leaking back into the httpx keepalive pool.\n2. **Bounded retry is correctly bounded.** for attempt in range(2) with a break on success and raise on attempt==1 exhaustion. No risk of infinite loop. Retry-exhausted ReadError/RemoteProtocolError bubble to the except Exception branch \u2192 jsonify({'error': {'type': 'api_error', ...}}), 502 \u2014 matches the existing error contract.\n3. **StopIteration is legally caught.** _send_and_prime() is a regular function, not a generator, so PEP 479 does not apply. An empty upstream body (first=None) correctly no-ops the first-chunk yield in generate() and the for-loop over primed_iterator terminates immediately.\n4. **Iterator handoff is single-owned.** iter_bytes() is called exactly once per upstream response (inside _send_and_prime); next() pulls one chunk; the same iterator object is returned and reused in generate()'s for-loop. No double-iter_bytes() call that would create a second generator on the same already-consumed stream.\n5. **Mid-stream synthetic frame is well-formed.** event: error\\ndata: {JSON}\\n\\n shape matches Anthropic's documented error event and is parsed by _SSEAccumulator._process_event at gateway.py:5114 (produces _error_blocks + stop_reason='error'), so the captured transcript correctly reflects the failed generation. Frame is fed through _consume_chunk before being yielded so the accumulator sees it.\n6. **finally: upstream.close() + _capture_streaming_response preserved.** Runs on success, on mid-stream ReadError, and on mid-stream RemoteProtocolError. Transcript capture still happens on failure \u2014 operators retain visibility into the partial turn.\n7. **Request rebuild on retry is safe.** headers is a resolved dict; request_body is bytes from request.get_data() (Flask caches it). build_request is called fresh inside _send_and_prime on every attempt, so no consumed-stream issue.\n8. **Retry scope is correct.** Only ReadError + RemoteProtocolError trigger the retry. ConnectError (502) and TimeoutException (504) still get their existing dedicated handlers \u2014 no behavior change for non-reset errors.\n\n### Security\n- No new attack surface: synthetic error frame payload is a fixed literal ('upstream connection reset'); no attacker-influenced string is interpolated into the SSE frame.\n- Credential injection path unchanged; headers dict is built once upstream of the retry loop.\n- No log injection: container_id comes from session, error string comes from httpx exception, both pass through logger.warning's structured kwargs (not format string injection).\n\n### Non-blocking observations\n- **gateway.py:5348** 'nonlocal bytes_seen' inside generate() is technically redundant \u2014 generate() only reads bytes_seen (in the warning log's kwargs), never assigns. Harmless, and removing it is a style change only.\n- **gateway.py:5285-5292** The inner try/except in _send_and_prime() only closes upstream_resp on httpx.ReadError/RemoteProtocolError. A non-transport exception at that point (e.g., an AttributeError from a pathological response mock) would leak the streaming connection. In practice this is unreachable for real httpx, but a broader 'except BaseException:' with try/close could be slightly more defensive. Not worth blocking.\n- **gateway.py:5357-5385** The synthetic error frame is counted against MAX_CAPTURE_SIZE via _consume_chunk. If the accumulator is already capture_truncated=True, the synthetic frame is still yielded downstream (correct) but won't appear in the captured transcript \u2014 the transcript will lose the error signal. For a 10MB-truncated capture this is a rare corner, but it means big-response-then-reset turns will not show as error=true in stop_reason. Document or special-case as future work; not blocking.\n- **gateway.py:5381** json.dumps() is called on every mid-stream reset; tiny allocation but could be hoisted to a module-level pre-encoded constant if this path ever becomes hot. Micro-optimization, skip.\n" + }, + "version": 1 + }, + "timestamp": "2026-04-23T05:40:57.283779+00:00", + "phase": "implement" + }, + { + "id": "4acb30fc-83d0-4e", + "pipeline_id": "issue-1907-v2", + "from_role": "reviewer_code", + "to_role": "documenter", + "message_type": "CONSENSUS_ACK", + "subject": "ACK from reviewer_code for documenter", + "body": "\nReviewed the full credential-injection.md diff (18 added lines, 56-76) against the implementation in gateway/gateway.py:5241-5408. Verified the docs accurately describe both resilience paths and their boundaries.\n\n### Accuracy (verified)\n- The pre-stream vs mid-stream table correctly characterizes what each path does, including the key subtlety that the retry is gated on 'no downstream byte has flowed' (implemented via the first-chunk prime in _send_and_prime, not via a bytes_seen == 0 runtime check \u2014 docs say 'gated on bytes_seen == 0' which is conceptually right but the implementation enforces it structurally by returning from _send_and_prime before Response() is built. Close enough \u2014 no correction needed).\n- The 'why not full resumption' explanation correctly identifies the two real concerns: no Anthropic resume tokens, and double-charging / divergent-generation interleaving.\n- The 'bounded retry \u2014 capped at one attempt' matches for attempt in range(2) with a single continue at attempt==0.\n- The 'falls through to the pre-existing except httpx.ConnectError / TimeoutException / Exception handlers' matches gateway.py:5433-5464 exactly.\n- The distinction from #1883 (gateway pod restart) and #1873 (consensus-wrapper turn-1 retry) is correct \u2014 those handle gateway-process-gone and single-agent-startup respectively; #1907 handles gateway-healthy/upstream-unhealthy, which is a disjoint concern.\n- The aclose() cleanup-bug reference correctly identifies why a clean synthetic SSE frame is preferable to a raw socket truncation \u2014 the downstream SDK's async generator cleanup races on a truncated read, producing the 'aclose(): asynchronous generator is already running' RuntimeError pattern we saw in overseer log_tail.\n\n### Structure / readability\n- Markdown table format is consistent with the existing doc style (rendered endpoint table directly above).\n- Cross-links to #1907, #1883, #1873 are correctly formatted.\n- Appropriately scoped \u2014 lives under 'Gateway Proxy Endpoints' where a streaming-resilience note naturally belongs, not shoehorned into a section about credentials.\n\n### Non-blocking observations\n- **credential-injection.md:74** Minor: 'gated on bytes_seen == 0' is a slight conceptual simplification \u2014 the actual gate is 'the first-chunk prime has not yet returned successfully.' bytes_seen only tracks what's been yielded once generate() runs. Either phrasing works; no change needed.\n- The doc could mention that the synthetic error frame's message is a fixed literal ('upstream connection reset') \u2014 useful for operators grepping transcripts for this failure mode. Non-blocking, nice-to-have.\n", + "metadata": { + "payload": { + "artifact_references": [ + "docs/architecture/credential-injection.md", + "db72789ee" + ], + "reason": "\nReviewed the full credential-injection.md diff (18 added lines, 56-76) against the implementation in gateway/gateway.py:5241-5408. Verified the docs accurately describe both resilience paths and their boundaries.\n\n### Accuracy (verified)\n- The pre-stream vs mid-stream table correctly characterizes what each path does, including the key subtlety that the retry is gated on 'no downstream byte has flowed' (implemented via the first-chunk prime in _send_and_prime, not via a bytes_seen == 0 runtime check \u2014 docs say 'gated on bytes_seen == 0' which is conceptually right but the implementation enforces it structurally by returning from _send_and_prime before Response() is built. Close enough \u2014 no correction needed).\n- The 'why not full resumption' explanation correctly identifies the two real concerns: no Anthropic resume tokens, and double-charging / divergent-generation interleaving.\n- The 'bounded retry \u2014 capped at one attempt' matches for attempt in range(2) with a single continue at attempt==0.\n- The 'falls through to the pre-existing except httpx.ConnectError / TimeoutException / Exception handlers' matches gateway.py:5433-5464 exactly.\n- The distinction from #1883 (gateway pod restart) and #1873 (consensus-wrapper turn-1 retry) is correct \u2014 those handle gateway-process-gone and single-agent-startup respectively; #1907 handles gateway-healthy/upstream-unhealthy, which is a disjoint concern.\n- The aclose() cleanup-bug reference correctly identifies why a clean synthetic SSE frame is preferable to a raw socket truncation \u2014 the downstream SDK's async generator cleanup races on a truncated read, producing the 'aclose(): asynchronous generator is already running' RuntimeError pattern we saw in overseer log_tail.\n\n### Structure / readability\n- Markdown table format is consistent with the existing doc style (rendered endpoint table directly above).\n- Cross-links to #1907, #1883, #1873 are correctly formatted.\n- Appropriately scoped \u2014 lives under 'Gateway Proxy Endpoints' where a streaming-resilience note naturally belongs, not shoehorned into a section about credentials.\n\n### Non-blocking observations\n- **credential-injection.md:74** Minor: 'gated on bytes_seen == 0' is a slight conceptual simplification \u2014 the actual gate is 'the first-chunk prime has not yet returned successfully.' bytes_seen only tracks what's been yielded once generate() runs. Either phrasing works; no change needed.\n- The doc could mention that the synthetic error frame's message is a fixed literal ('upstream connection reset') \u2014 useful for operators grepping transcripts for this failure mode. Non-blocking, nice-to-have.\n" + }, + "version": 1 + }, + "timestamp": "2026-04-23T05:41:15.883063+00:00", + "phase": "implement" + }, + { + "id": "5c8544d6-3be4-4c", + "pipeline_id": "issue-1907-v2", + "from_role": "orchestrator", + "to_role": "documenter", + "message_type": "STATUS", + "subject": "All reviewers have ACKed \u2014 ready to confirm", + "body": "All assigned reviewers have ACKed your proposal (version 1). Run `egg-orch consensus confirmed` to confirm.", + "metadata": { + "fully_acked": true, + "version": 1 + }, + "timestamp": "2026-04-23T05:41:15.883077+00:00", + "phase": "implement" + }, + { + "id": "6086974b-301d-4b", + "pipeline_id": "issue-1907-v2", + "from_role": "documenter", + "to_role": "all", + "message_type": "CONSENSUS_CONFIRMED", + "subject": "Confirmed by documenter (pending_acks)", + "body": "Agent documenter cannot confirm: producers ['tester'] have never proposed (proposal_version == 0). All producers must propose before any agent can confirm consensus.", + "metadata": { + "pending_acks": true + }, + "timestamp": "2026-04-23T05:41:47.404042+00:00", + "phase": "implement" + }, + { + "id": "693bd80a-e281-4a", + "pipeline_id": "issue-1907-v2", + "from_role": "reviewer_code", + "to_role": "coder", + "message_type": "CONSENSUS_ACK", + "subject": "ACK from reviewer_code for coder", + "body": "\nRe-reviewing coder's re-proposal at commit dda1f2ad7 (now covers the full implement payload: gateway.py resilience code + tests that tester landed). Same substantive review as my prior ACK \u2014 all concerns verified against the final HEAD.\n\n### Correctness (verified against gateway/gateway.py:5241-5408)\n1. **Pre-stream prime pattern.** _send_and_prime() calls client.send(..., stream=True), then iter_bytes(), then next(iterator) eagerly. The first-chunk fetch is what gates the 'no byte yielded' invariant \u2014 Response() is constructed only after prime succeeds, so retry is structurally safe. If send() raises ReadError/RemoteProtocolError, upstream_resp is never bound (correct \u2014 nothing to close, the connection never committed). If iter_bytes() or next() raises, the inner except closes upstream_resp before re-raising, preventing a half-open conn leaking back into httpx's keepalive pool.\n2. **Bounded retry.** for attempt in range(2), break on success, raise on attempt==1 exhaustion. No infinite-loop risk. Exhausted ReadError/RemoteProtocolError propagate to except Exception \u2192 502 (httpx.ReadError and RemoteProtocolError are both subclasses of httpx.HTTPError and Exception \u2014 verified via the class __mro__).\n3. **StopIteration.** _send_and_prime is a regular function (not a generator), so PEP 479 doesn't apply \u2014 catching StopIteration from next(iterator) is legal. Empty body (first=None) correctly no-ops the first-chunk yield.\n4. **Iterator ownership.** iter_bytes() is called exactly once per upstream response, and the same iterator object is returned and reused in generate()'s for-loop. No second-call-to-iter_bytes that would reset the read-position or raise.\n5. **Synthetic SSE frame.** event: error\\ndata: {JSON}\\n\\n matches Anthropic's documented shape and is parsed by _SSEAccumulator._process_event at gateway.py:5114 \u2192 produces _error_blocks + stop_reason='error' in the captured transcript. Fed through _consume_chunk before yield so the accumulator sees it.\n6. **finally: upstream.close() + _capture_streaming_response preserved** on all paths: success, mid-stream ReadError, mid-stream RemoteProtocolError. Operators retain transcript visibility into partial turns.\n7. **Retry is idempotent.** headers is a resolved dict; request_body is bytes (Flask caches via get_data()); build_request is fresh per attempt. No consumed-stream risk across retries.\n8. **Exception scope.** Only ReadError + RemoteProtocolError trigger retry. ConnectError \u2192 502 and TimeoutException \u2192 504 keep their existing handlers unchanged.\n\n### Tests (verified against tests/gateway/test_anthropic_proxy.py:542-813)\nFour new tests in TestStreamingResponse:\n- test_streaming_send_reset_retries_once \u2014 covers task-1-1 clause (a): send() raises, retry succeeds. Asserts send called twice, 200 status, no synthetic error frame, good_response.close() invoked.\n- test_streaming_first_chunk_reset_retries_once \u2014 covers task-1-1 clause (b): first iter_bytes() pull raises, retry succeeds. Asserts bad_response.close() called (no pool leak) before good_response.close().\n- test_streaming_midstream_reset_yields_synthetic_error_frame \u2014 covers task-1-2: RemoteProtocolError after first chunk \u2192 downstream body = original chunk + synthetic event: error frame. Asserts no retry, body.endswith(b'\\n\\n'), first_chunk precedes error frame, and parses the synthetic JSON to verify shape (type='error', error.type='api_error', message present).\n- test_streaming_send_reset_retry_exhausted_returns_502 \u2014 extra defense: both attempts raise, downstream gets 502, mock_client.send.call_count == 2 (bounded).\n\nHelper _iter_then_raise(chunks, exc) matches task-1-3's 'helper to wrap an iterator so it raises after N yielded chunks' requirement.\n\nTester reports and in commit dda1f2ad7's message.\n\n### Security\n- Synthetic error frame payload is a fixed literal ('upstream connection reset') \u2014 no attacker-controlled interpolation into SSE wire.\n- Credential injection path unchanged; headers dict built once upstream of retry loop.\n- No log injection: container_id and error come through structured logger.warning kwargs.\n\n### Non-blocking observations\n- **gateway.py:5348** 'nonlocal bytes_seen' is redundant in generate() \u2014 only read, never assigned. Harmless.\n- **gateway.py:5285-5292** Inner except in _send_and_prime only closes upstream_resp on ReadError/RemoteProtocolError. Non-transport exceptions (e.g., AttributeError) would leak; unreachable in practice with real httpx, but a broader except + try-close is slightly more defensive. Not blocking.\n- **gateway.py:5357-5385** Synthetic error frame is counted against MAX_CAPTURE_SIZE via _consume_chunk. If the accumulator is already capture_truncated=True (>10MB response), the synthetic frame still yields downstream correctly but won't appear in the transcript \u2014 so big-response-then-reset turns lose the error signal in stop_reason. Rare corner; non-blocking.\n- **gateway.py:5381** json.dumps on every mid-stream reset is a micro-allocation; could be hoisted to a module-level pre-encoded constant. Skip.\n", + "metadata": { + "payload": { + "artifact_references": [ + "gateway/gateway.py", + "tests/gateway/test_anthropic_proxy.py", + "dda1f2ad7" + ], + "reason": "\nRe-reviewing coder's re-proposal at commit dda1f2ad7 (now covers the full implement payload: gateway.py resilience code + tests that tester landed). Same substantive review as my prior ACK \u2014 all concerns verified against the final HEAD.\n\n### Correctness (verified against gateway/gateway.py:5241-5408)\n1. **Pre-stream prime pattern.** _send_and_prime() calls client.send(..., stream=True), then iter_bytes(), then next(iterator) eagerly. The first-chunk fetch is what gates the 'no byte yielded' invariant \u2014 Response() is constructed only after prime succeeds, so retry is structurally safe. If send() raises ReadError/RemoteProtocolError, upstream_resp is never bound (correct \u2014 nothing to close, the connection never committed). If iter_bytes() or next() raises, the inner except closes upstream_resp before re-raising, preventing a half-open conn leaking back into httpx's keepalive pool.\n2. **Bounded retry.** for attempt in range(2), break on success, raise on attempt==1 exhaustion. No infinite-loop risk. Exhausted ReadError/RemoteProtocolError propagate to except Exception \u2192 502 (httpx.ReadError and RemoteProtocolError are both subclasses of httpx.HTTPError and Exception \u2014 verified via the class __mro__).\n3. **StopIteration.** _send_and_prime is a regular function (not a generator), so PEP 479 doesn't apply \u2014 catching StopIteration from next(iterator) is legal. Empty body (first=None) correctly no-ops the first-chunk yield.\n4. **Iterator ownership.** iter_bytes() is called exactly once per upstream response, and the same iterator object is returned and reused in generate()'s for-loop. No second-call-to-iter_bytes that would reset the read-position or raise.\n5. **Synthetic SSE frame.** event: error\\ndata: {JSON}\\n\\n matches Anthropic's documented shape and is parsed by _SSEAccumulator._process_event at gateway.py:5114 \u2192 produces _error_blocks + stop_reason='error' in the captured transcript. Fed through _consume_chunk before yield so the accumulator sees it.\n6. **finally: upstream.close() + _capture_streaming_response preserved** on all paths: success, mid-stream ReadError, mid-stream RemoteProtocolError. Operators retain transcript visibility into partial turns.\n7. **Retry is idempotent.** headers is a resolved dict; request_body is bytes (Flask caches via get_data()); build_request is fresh per attempt. No consumed-stream risk across retries.\n8. **Exception scope.** Only ReadError + RemoteProtocolError trigger retry. ConnectError \u2192 502 and TimeoutException \u2192 504 keep their existing handlers unchanged.\n\n### Tests (verified against tests/gateway/test_anthropic_proxy.py:542-813)\nFour new tests in TestStreamingResponse:\n- test_streaming_send_reset_retries_once \u2014 covers task-1-1 clause (a): send() raises, retry succeeds. Asserts send called twice, 200 status, no synthetic error frame, good_response.close() invoked.\n- test_streaming_first_chunk_reset_retries_once \u2014 covers task-1-1 clause (b): first iter_bytes() pull raises, retry succeeds. Asserts bad_response.close() called (no pool leak) before good_response.close().\n- test_streaming_midstream_reset_yields_synthetic_error_frame \u2014 covers task-1-2: RemoteProtocolError after first chunk \u2192 downstream body = original chunk + synthetic event: error frame. Asserts no retry, body.endswith(b'\\n\\n'), first_chunk precedes error frame, and parses the synthetic JSON to verify shape (type='error', error.type='api_error', message present).\n- test_streaming_send_reset_retry_exhausted_returns_502 \u2014 extra defense: both attempts raise, downstream gets 502, mock_client.send.call_count == 2 (bounded).\n\nHelper _iter_then_raise(chunks, exc) matches task-1-3's 'helper to wrap an iterator so it raises after N yielded chunks' requirement.\n\nTester reports and in commit dda1f2ad7's message.\n\n### Security\n- Synthetic error frame payload is a fixed literal ('upstream connection reset') \u2014 no attacker-controlled interpolation into SSE wire.\n- Credential injection path unchanged; headers dict built once upstream of retry loop.\n- No log injection: container_id and error come through structured logger.warning kwargs.\n\n### Non-blocking observations\n- **gateway.py:5348** 'nonlocal bytes_seen' is redundant in generate() \u2014 only read, never assigned. Harmless.\n- **gateway.py:5285-5292** Inner except in _send_and_prime only closes upstream_resp on ReadError/RemoteProtocolError. Non-transport exceptions (e.g., AttributeError) would leak; unreachable in practice with real httpx, but a broader except + try-close is slightly more defensive. Not blocking.\n- **gateway.py:5357-5385** Synthetic error frame is counted against MAX_CAPTURE_SIZE via _consume_chunk. If the accumulator is already capture_truncated=True (>10MB response), the synthetic frame still yields downstream correctly but won't appear in the transcript \u2014 so big-response-then-reset turns lose the error signal in stop_reason. Rare corner; non-blocking.\n- **gateway.py:5381** json.dumps on every mid-stream reset is a micro-allocation; could be hoisted to a module-level pre-encoded constant. Skip.\n" + }, + "version": 1 + }, + "timestamp": "2026-04-23T05:42:41.320703+00:00", + "phase": "implement" + }, + { + "id": "3b886e85-f331-4f", + "pipeline_id": "issue-1907-v2", + "from_role": "reviewer_code", + "to_role": "documenter", + "message_type": "CONSENSUS_ACK", + "subject": "ACK from reviewer_code for documenter", + "body": "\nRe-reviewing documenter's re-proposal at 0a4e87643, which adds gateway/README.md breadcrumb to the previously-reviewed credential-injection.md content.\n\n### credential-injection.md (re-verified)\nMatches implementation at gateway/gateway.py:5241-5408:\n- Pre-stream vs mid-stream table accurately describes behavior.\n- 'Why not full resumption' rationale is correct (no Anthropic resume tokens, double-charging, divergent generation interleaving).\n- 'Bounded retry' matches for attempt in range(2) with single continue.\n- Fall-through to ConnectError/TimeoutException/Exception handlers matches gateway.py:5433-5464.\n- Relationship to #1883 and #1873 is correctly distinguished.\n- The aclose() cleanup-bug reference correctly identifies the downstream SDK failure mode that a clean synthetic SSE frame avoids.\n\n### gateway/README.md delta (0a4e87643)\nNew content:\n- Line 421-430: /v1/messages endpoint description expanded with a 3-sentence summary of the resilience guarantees + cross-link to credential-injection.md. Content accurately matches implementation (pre-stream bounded single retry, mid-stream synthetic SSE error frame).\n- Line 565: Design decision #11 added in the same style as decisions 1-10. Correctly states: bounded to one attempt, gated on bytes_seen == 0 conceptually, mid-stream fallback because no resume tokens, risk of double-charging/interleaved generations. Correctly distinguishes from #1883 (pod restart) and #1873 (turn-1 consensus-wrapper retry).\n\n### Discoverability\nGood layering: operator-facing API reference (gateway/README.md) gets a short breadcrumb; design rationale (docs/architecture/credential-injection.md) holds the full table and prose. No duplication \u2014 the README content is a 3-line summary pointing to the detail doc.\n\n### Non-blocking observations\n- **credential-injection.md:74 / gateway/README.md design-decision #11** 'gated on bytes_seen == 0' is a slight conceptual simplification \u2014 the actual gate is 'the first-chunk prime returned successfully'. bytes_seen only tracks yields once generate() runs. Either phrasing is correct for operators.\n- Design decision #11 could mention the synthetic error message is the fixed literal 'upstream connection reset' (helps operators grep transcripts for this failure mode). Non-blocking nice-to-have.\n", + "metadata": { + "payload": { + "artifact_references": [ + "docs/architecture/credential-injection.md", + "gateway/README.md", + "0a4e87643" + ], + "reason": "\nRe-reviewing documenter's re-proposal at 0a4e87643, which adds gateway/README.md breadcrumb to the previously-reviewed credential-injection.md content.\n\n### credential-injection.md (re-verified)\nMatches implementation at gateway/gateway.py:5241-5408:\n- Pre-stream vs mid-stream table accurately describes behavior.\n- 'Why not full resumption' rationale is correct (no Anthropic resume tokens, double-charging, divergent generation interleaving).\n- 'Bounded retry' matches for attempt in range(2) with single continue.\n- Fall-through to ConnectError/TimeoutException/Exception handlers matches gateway.py:5433-5464.\n- Relationship to #1883 and #1873 is correctly distinguished.\n- The aclose() cleanup-bug reference correctly identifies the downstream SDK failure mode that a clean synthetic SSE frame avoids.\n\n### gateway/README.md delta (0a4e87643)\nNew content:\n- Line 421-430: /v1/messages endpoint description expanded with a 3-sentence summary of the resilience guarantees + cross-link to credential-injection.md. Content accurately matches implementation (pre-stream bounded single retry, mid-stream synthetic SSE error frame).\n- Line 565: Design decision #11 added in the same style as decisions 1-10. Correctly states: bounded to one attempt, gated on bytes_seen == 0 conceptually, mid-stream fallback because no resume tokens, risk of double-charging/interleaved generations. Correctly distinguishes from #1883 (pod restart) and #1873 (turn-1 consensus-wrapper retry).\n\n### Discoverability\nGood layering: operator-facing API reference (gateway/README.md) gets a short breadcrumb; design rationale (docs/architecture/credential-injection.md) holds the full table and prose. No duplication \u2014 the README content is a 3-line summary pointing to the detail doc.\n\n### Non-blocking observations\n- **credential-injection.md:74 / gateway/README.md design-decision #11** 'gated on bytes_seen == 0' is a slight conceptual simplification \u2014 the actual gate is 'the first-chunk prime returned successfully'. bytes_seen only tracks yields once generate() runs. Either phrasing is correct for operators.\n- Design decision #11 could mention the synthetic error message is the fixed literal 'upstream connection reset' (helps operators grep transcripts for this failure mode). Non-blocking nice-to-have.\n" + }, + "version": 1 + }, + "timestamp": "2026-04-23T05:43:00.063692+00:00", + "phase": "implement" + }, + { + "id": "3b395420-caae-49", + "pipeline_id": "issue-1907-v2", + "from_role": "orchestrator", + "to_role": "documenter", + "message_type": "STATUS", + "subject": "All reviewers have ACKed \u2014 ready to confirm", + "body": "All assigned reviewers have ACKed your proposal (version 1). Run `egg-orch consensus confirmed` to confirm.", + "metadata": { + "fully_acked": true, + "version": 1 + }, + "timestamp": "2026-04-23T05:43:00.063704+00:00", + "phase": "implement" + }, + { + "id": "c5a1595e-686a-47", + "pipeline_id": "issue-1907-v2", + "from_role": "tester", + "to_role": "all", + "message_type": "CONSENSUS_PROPOSE", + "subject": "Proposal from tester", + "body": "Validated coder's gateway stream-reset resilience fix for #1907 and extended TestStreamingResponse with 4 new tests in tests/gateway/test_anthropic_proxy.py (commit dda1f2a). All three contract acceptance cases are covered: (a) test_streaming_send_reset_retries_once \u2014 client.send() raises httpx.ReadError once, bounded 1x retry produces clean 200 SSE; (b) test_streaming_first_chunk_reset_retries_once \u2014 first iter_bytes() pull raises ReadError, gateway closes bad upstream and re-primes; (c) test_streaming_midstream_reset_yields_synthetic_error_frame \u2014 RemoteProtocolError after one chunk yields well-formed Anthropic-style 'event: error' SSE frame after the original chunk, JSON-parses the synthetic payload to detect malformed output, verifies upstream.close() runs, and confirms no retry is attempted mid-stream. Plus one defense-in-depth test (test_streaming_send_reset_retry_exhausted_returns_502) that confirms the retry is bounded to 1x and falls through to 502. Tests use the contract-mandated _iter_then_raise helper that wraps an iterator so it raises after N yielded chunks. Checks passed: ruff check (clean), ruff format --check (686 files already formatted), mypy (Success: no issues found in 186 source files), pytest tests/gateway/ (129 passed). Wider test-suite failures in orchestrator/tests/test_kubernetes_client.py and orchestrator/tests/test_gateway_client.py are pre-existing sandbox env issues (module 'kubernetes.client' missing V1SecurityContext/AppsV1Api) unrelated to this PR. Satisfies task-1-3; task-1-1 and task-1-2 validated as correctly implemented by coder in gateway/gateway.py (commit dc5058a). No gaps found \u2014 coder's implementation matches contract spec.", + "metadata": { + "payload": { + "summary": "Validated coder's gateway stream-reset resilience fix for #1907 and extended TestStreamingResponse with 4 new tests in tests/gateway/test_anthropic_proxy.py (commit dda1f2a). All three contract acceptance cases are covered: (a) test_streaming_send_reset_retries_once \u2014 client.send() raises httpx.ReadError once, bounded 1x retry produces clean 200 SSE; (b) test_streaming_first_chunk_reset_retries_once \u2014 first iter_bytes() pull raises ReadError, gateway closes bad upstream and re-primes; (c) test_streaming_midstream_reset_yields_synthetic_error_frame \u2014 RemoteProtocolError after one chunk yields well-formed Anthropic-style 'event: error' SSE frame after the original chunk, JSON-parses the synthetic payload to detect malformed output, verifies upstream.close() runs, and confirms no retry is attempted mid-stream. Plus one defense-in-depth test (test_streaming_send_reset_retry_exhausted_returns_502) that confirms the retry is bounded to 1x and falls through to 502. Tests use the contract-mandated _iter_then_raise helper that wraps an iterator so it raises after N yielded chunks. Checks passed: ruff check (clean), ruff format --check (686 files already formatted), mypy (Success: no issues found in 186 source files), pytest tests/gateway/ (129 passed). Wider test-suite failures in orchestrator/tests/test_kubernetes_client.py and orchestrator/tests/test_gateway_client.py are pre-existing sandbox env issues (module 'kubernetes.client' missing V1SecurityContext/AppsV1Api) unrelated to this PR. Satisfies task-1-3; task-1-1 and task-1-2 validated as correctly implemented by coder in gateway/gateway.py (commit dc5058a). No gaps found \u2014 coder's implementation matches contract spec.", + "artifacts": [ + "tests/gateway/test_anthropic_proxy.py" + ], + "files_changed": [ + "tests/gateway/test_anthropic_proxy.py" + ], + "tests_run": [ + "tests/gateway/test_anthropic_proxy.py::TestStreamingResponse::test_streaming_send_reset_retries_once", + "tests/gateway/test_anthropic_proxy.py::TestStreamingResponse::test_streaming_first_chunk_reset_retries_once", + "tests/gateway/test_anthropic_proxy.py::TestStreamingResponse::test_streaming_midstream_reset_yields_synthetic_error_frame", + "tests/gateway/test_anthropic_proxy.py::TestStreamingResponse::test_streaming_send_reset_retry_exhausted_returns_502" + ], + "tasks": [ + "task-1-3" + ], + "checks_passed": [ + "lint", + "test" + ], + "tests_execution_blocked": false, + "commit_sha": "dda1f2ad76ecbc08de27ada991a494fd725297d2" + }, + "version": 1, + "commit_sha": "dda1f2ad76ecbc08de27ada991a494fd725297d2" + }, + "timestamp": "2026-04-23T05:50:23.317921+00:00", + "phase": "implement" + }, + { + "id": "7863726e-b980-40", + "pipeline_id": "issue-1907-v2", + "from_role": "reviewer_contract", + "to_role": "all", + "message_type": "CONSENSUS_CONFIRMED", + "subject": "Confirmed by reviewer_contract", + "body": "", + "metadata": { + "consensus_reached": false + }, + "timestamp": "2026-04-23T05:50:33.033892+00:00", + "phase": "implement" + }, + { + "id": "13ac79cf-8c58-45", + "pipeline_id": "issue-1907-v2", + "from_role": "documenter", + "to_role": "all", + "message_type": "CONSENSUS_CONFIRMED", + "subject": "Confirmed by documenter", + "body": "", + "metadata": { + "consensus_reached": false + }, + "timestamp": "2026-04-23T05:50:44.881622+00:00", + "phase": "implement" + }, + { + "id": "134d53ed-1469-4f", + "pipeline_id": "issue-1907-v2", + "from_role": "tester", + "to_role": "coder", + "message_type": "CONSENSUS_ACK", + "subject": "ACK from tester for coder", + "body": "Reviewed gateway/gateway.py in commit dc5058a. Verified task-1-1 (pre-stream retry): _send_and_prime() correctly wraps client.send() and the first-chunk prime, re-raises only httpx.ReadError and httpx.RemoteProtocolError, closes the failed upstream in its own except branch before re-raising (no connection-pool leak), and the outer 'for attempt in range(2)' loop enforces a bounded 1x retry with logger.warning(container_id, error=str(reset_err)) between attempts and re-raise on exhaustion so the existing outer except returns 502. Correctly gated on bytes_seen == 0 (no byte yielded downstream yet). Verified task-1-2 (mid-stream synthetic frame): generate() now splits into a 'yield first_chunk if not None, then iterate primed_iterator' pattern wrapped in try/except (httpx.ReadError, httpx.RemoteProtocolError); on catch, emits a well-formed SSE frame 'event: error\\ndata: {\"type\":\"error\",\"error\":{\"type\":\"api_error\",\"message\":\"upstream connection reset\"}}\\n\\n', feeds it through the accumulator via _consume_chunk (respects MAX_CAPTURE_SIZE budget), logs a warning with container_id and bytes_seen, and returns cleanly. The existing finally: upstream.close() and _capture_streaming_response behavior is preserved \u2014 generate() still returns via the normal path, and upstream.close() still runs because the finally: branch is untouched. All 50 tests in tests/gateway/test_anthropic_proxy.py pass (including my 4 new resilience tests) and the wider 129-test gateway/ suite is clean. ruff check, ruff format --check, and mypy are all green.\\n### Non-blocking\\n- **gateway/gateway.py:5278** \u2014 The retry loop swallows the first reset_err's full traceback when the retry succeeds. That's intentional (transparent retry) but worth a one-line comment acknowledging it for future maintainers.", + "metadata": { + "payload": { + "artifact_references": [ + "gateway/gateway.py" + ], + "reason": "Reviewed gateway/gateway.py in commit dc5058a. Verified task-1-1 (pre-stream retry): _send_and_prime() correctly wraps client.send() and the first-chunk prime, re-raises only httpx.ReadError and httpx.RemoteProtocolError, closes the failed upstream in its own except branch before re-raising (no connection-pool leak), and the outer 'for attempt in range(2)' loop enforces a bounded 1x retry with logger.warning(container_id, error=str(reset_err)) between attempts and re-raise on exhaustion so the existing outer except returns 502. Correctly gated on bytes_seen == 0 (no byte yielded downstream yet). Verified task-1-2 (mid-stream synthetic frame): generate() now splits into a 'yield first_chunk if not None, then iterate primed_iterator' pattern wrapped in try/except (httpx.ReadError, httpx.RemoteProtocolError); on catch, emits a well-formed SSE frame 'event: error\\ndata: {\"type\":\"error\",\"error\":{\"type\":\"api_error\",\"message\":\"upstream connection reset\"}}\\n\\n', feeds it through the accumulator via _consume_chunk (respects MAX_CAPTURE_SIZE budget), logs a warning with container_id and bytes_seen, and returns cleanly. The existing finally: upstream.close() and _capture_streaming_response behavior is preserved \u2014 generate() still returns via the normal path, and upstream.close() still runs because the finally: branch is untouched. All 50 tests in tests/gateway/test_anthropic_proxy.py pass (including my 4 new resilience tests) and the wider 129-test gateway/ suite is clean. ruff check, ruff format --check, and mypy are all green.\\n### Non-blocking\\n- **gateway/gateway.py:5278** \u2014 The retry loop swallows the first reset_err's full traceback when the retry succeeds. That's intentional (transparent retry) but worth a one-line comment acknowledging it for future maintainers." + }, + "version": 1 + }, + "timestamp": "2026-04-23T05:50:50.211513+00:00", + "phase": "implement" + }, + { + "id": "afa044d8-8b48-4d", + "pipeline_id": "issue-1907-v2", + "from_role": "orchestrator", + "to_role": "coder", + "message_type": "STATUS", + "subject": "All reviewers have ACKed \u2014 ready to confirm", + "body": "All assigned reviewers have ACKed your proposal (version 1). Run `egg-orch consensus confirmed` to confirm.", + "metadata": { + "fully_acked": true, + "version": 1 + }, + "timestamp": "2026-04-23T05:50:50.211536+00:00", + "phase": "implement" + }, + { + "id": "679e33a5-58a4-47", + "pipeline_id": "issue-1907-v2", + "from_role": "tester", + "to_role": "all", + "message_type": "CONSENSUS_CONFIRMED", + "subject": "Confirmed by tester (pending_acks)", + "body": "Producer tester cannot confirm: not fully ACKed. Pending reviewers: ['reviewer_code']", + "metadata": { + "pending_acks": true + }, + "timestamp": "2026-04-23T05:50:59.218838+00:00", + "phase": "implement" + }, + { + "id": "537938e8-9162-4e", + "pipeline_id": "issue-1907-v2", + "from_role": "reviewer_code", + "to_role": "tester", + "message_type": "CONSENSUS_ACK", + "subject": "ACK from reviewer_code for tester", + "body": "\nReviewed tests/gateway/test_anthropic_proxy.py additions at commit dda1f2ad7 (lines 542-813 in TestStreamingResponse, +269 lines total). Verified all tests trace to contract task-1-3 acceptance and that the test-execution evidence in the commit message is credible.\n\n### Test-execution evidence\nCommit message reports 'pytest tests/gateway/test_anthropic_proxy.py -> 50 passed' and 'ruff check + ruff format --check clean'. Pre-patch test count in the file was 46 \u2014 adding 4 new tests brings it to 50 passed (math checks out). No tests_execution_blocked indicator; tester has actually run the suite.\n\n### Contract coverage (task-1-3)\nContract required three tests; tester provided four (three mandatory + one extra for the retry-exhausted 502 path):\n\n1. **test_streaming_send_reset_retries_once** \u2014 task-1-3(a): client.send() raises ReadError once then succeeds on retry.\n Asserts send called exactly twice (bounded retry), 200 status, body contains message_start/message_stop, no 'event: error' frame present (retry-success path).\n\n2. **test_streaming_first_chunk_reset_retries_once** \u2014 task-1-3(b): first iter_bytes() pull raises ReadError, retry succeeds.\n Uses _iter_then_raise([], ReadError) for empty-before-raise \u2014 exactly matches contract language 'simulating a reset before any byte is forwarded downstream.' Asserts bad_response.close() before good_response.close() (no half-open conn leaking into httpx keepalive pool). This is a stronger check than the contract required and catches a real class of connection-pool-leak regressions.\n\n3. **test_streaming_midstream_reset_yields_synthetic_error_frame** \u2014 task-1-3(c): iter_bytes raises RemoteProtocolError after one chunk.\n Good depth: asserts no retry attempted (mock_client.send.call_count == 1), asserts upstream.close() still runs via finally, verifies first_chunk precedes error frame (ordering), asserts body.endswith(b'\\n\\n') (proper SSE terminator \u2014 the exact property that the downstream SDK's parser depends on to treat this as a complete event instead of a truncation), parses the synthetic frame as JSON to catch malformed output (type='error', error.type='api_error', message field present). Covers both JSON space formats ('\"type\": \"api_error\"' and '\"type\":\"api_error\"') so the test isn't brittle to json.dumps separators changing.\n\n4. **test_streaming_send_reset_retry_exhausted_returns_502** \u2014 Extra defense-in-depth.\n Both attempts raise different exception types (ReadError on first, RemoteProtocolError on second); asserts send called exactly twice (bounded), 502 status, body contains 'api_error'. Guards against infinite-loop regression if someone accidentally widens the retry bound.\n\n### Helper\n_iter_then_raise(chunks, exc) static method is the 'small helper to wrap an iterator so it raises after N yielded chunks' the contract calls for. Passing chunks=[] causes raise on first next() (empty-body-then-raise), matching the first-chunk-reset scenario. Passing [chunk1] causes raise on second next() (one-chunk-then-raise), matching the mid-stream scenario. Idiomatic and minimal.\n\n### Pattern fit\nTest mocking style is consistent with pre-existing TestStreamingResponse tests (MagicMock with .status_code / .headers / .iter_bytes / .close; httpx.Headers for response headers; json.dumps body; client.post to the Flask test client; body = b''.join(response.response) to materialize the streamed body). No new fixture machinery required.\n\n### Regression coverage\nAll pre-existing streaming tests (test_streaming_request_detected, test_streaming_content_type_forwarded) still pass per commit message \u2014 46 prior tests + 4 new = 50 passed, matches the reported count.\n\n### Non-blocking observations\n- **test_anthropic_proxy.py:762** The midstream test asserts 'b\"upstream connection reset\" in body' \u2014 fine today because the synthetic message is a fixed literal, but if the error message becomes parameterized (e.g., include bytes_seen in the user-facing message), this assertion tightens into a regression trap. Consider a more abstract check ('error' in body's payload dict) if the message shape ever becomes dynamic.\n- Test classes import httpx and httpx.Headers inside each function rather than at module scope. Pre-existing pattern in this file, so consistent \u2014 just noting.\n", + "metadata": { + "payload": { + "artifact_references": [ + "tests/gateway/test_anthropic_proxy.py", + "dda1f2ad7" + ], + "reason": "\nReviewed tests/gateway/test_anthropic_proxy.py additions at commit dda1f2ad7 (lines 542-813 in TestStreamingResponse, +269 lines total). Verified all tests trace to contract task-1-3 acceptance and that the test-execution evidence in the commit message is credible.\n\n### Test-execution evidence\nCommit message reports 'pytest tests/gateway/test_anthropic_proxy.py -> 50 passed' and 'ruff check + ruff format --check clean'. Pre-patch test count in the file was 46 \u2014 adding 4 new tests brings it to 50 passed (math checks out). No tests_execution_blocked indicator; tester has actually run the suite.\n\n### Contract coverage (task-1-3)\nContract required three tests; tester provided four (three mandatory + one extra for the retry-exhausted 502 path):\n\n1. **test_streaming_send_reset_retries_once** \u2014 task-1-3(a): client.send() raises ReadError once then succeeds on retry.\n Asserts send called exactly twice (bounded retry), 200 status, body contains message_start/message_stop, no 'event: error' frame present (retry-success path).\n\n2. **test_streaming_first_chunk_reset_retries_once** \u2014 task-1-3(b): first iter_bytes() pull raises ReadError, retry succeeds.\n Uses _iter_then_raise([], ReadError) for empty-before-raise \u2014 exactly matches contract language 'simulating a reset before any byte is forwarded downstream.' Asserts bad_response.close() before good_response.close() (no half-open conn leaking into httpx keepalive pool). This is a stronger check than the contract required and catches a real class of connection-pool-leak regressions.\n\n3. **test_streaming_midstream_reset_yields_synthetic_error_frame** \u2014 task-1-3(c): iter_bytes raises RemoteProtocolError after one chunk.\n Good depth: asserts no retry attempted (mock_client.send.call_count == 1), asserts upstream.close() still runs via finally, verifies first_chunk precedes error frame (ordering), asserts body.endswith(b'\\n\\n') (proper SSE terminator \u2014 the exact property that the downstream SDK's parser depends on to treat this as a complete event instead of a truncation), parses the synthetic frame as JSON to catch malformed output (type='error', error.type='api_error', message field present). Covers both JSON space formats ('\"type\": \"api_error\"' and '\"type\":\"api_error\"') so the test isn't brittle to json.dumps separators changing.\n\n4. **test_streaming_send_reset_retry_exhausted_returns_502** \u2014 Extra defense-in-depth.\n Both attempts raise different exception types (ReadError on first, RemoteProtocolError on second); asserts send called exactly twice (bounded), 502 status, body contains 'api_error'. Guards against infinite-loop regression if someone accidentally widens the retry bound.\n\n### Helper\n_iter_then_raise(chunks, exc) static method is the 'small helper to wrap an iterator so it raises after N yielded chunks' the contract calls for. Passing chunks=[] causes raise on first next() (empty-body-then-raise), matching the first-chunk-reset scenario. Passing [chunk1] causes raise on second next() (one-chunk-then-raise), matching the mid-stream scenario. Idiomatic and minimal.\n\n### Pattern fit\nTest mocking style is consistent with pre-existing TestStreamingResponse tests (MagicMock with .status_code / .headers / .iter_bytes / .close; httpx.Headers for response headers; json.dumps body; client.post to the Flask test client; body = b''.join(response.response) to materialize the streamed body). No new fixture machinery required.\n\n### Regression coverage\nAll pre-existing streaming tests (test_streaming_request_detected, test_streaming_content_type_forwarded) still pass per commit message \u2014 46 prior tests + 4 new = 50 passed, matches the reported count.\n\n### Non-blocking observations\n- **test_anthropic_proxy.py:762** The midstream test asserts 'b\"upstream connection reset\" in body' \u2014 fine today because the synthetic message is a fixed literal, but if the error message becomes parameterized (e.g., include bytes_seen in the user-facing message), this assertion tightens into a regression trap. Consider a more abstract check ('error' in body's payload dict) if the message shape ever becomes dynamic.\n- Test classes import httpx and httpx.Headers inside each function rather than at module scope. Pre-existing pattern in this file, so consistent \u2014 just noting.\n" + }, + "version": 1 + }, + "timestamp": "2026-04-23T05:52:30.470465+00:00", + "phase": "implement" + }, + { + "id": "f97d1463-7f31-4b", + "pipeline_id": "issue-1907-v2", + "from_role": "orchestrator", + "to_role": "tester", + "message_type": "STATUS", + "subject": "All reviewers have ACKed \u2014 ready to confirm", + "body": "All assigned reviewers have ACKed your proposal (version 1). Run `egg-orch consensus confirmed` to confirm.", + "metadata": { + "fully_acked": true, + "version": 1 + }, + "timestamp": "2026-04-23T05:52:30.470481+00:00", + "phase": "implement" + }, + { + "id": "0006d9b1-aee9-45", + "pipeline_id": "issue-1907-v2", + "from_role": "tester", + "to_role": "all", + "message_type": "CONSENSUS_CONFIRMED", + "subject": "Confirmed by tester", + "body": "", + "metadata": { + "consensus_reached": false + }, + "timestamp": "2026-04-23T05:52:34.275233+00:00", + "phase": "implement" + }, + { + "id": "5747dbbe-a6c4-4f", + "pipeline_id": "issue-1907-v2", + "from_role": "reviewer_code", + "to_role": "all", + "message_type": "CONSENSUS_CONFIRMED", + "subject": "Confirmed by reviewer_code", + "body": "", + "metadata": { + "consensus_reached": false + }, + "timestamp": "2026-04-23T05:52:36.417891+00:00", + "phase": "implement" + }, + { + "id": "a7434659-b746-46", + "pipeline_id": "issue-1907-v2", + "from_role": "coder", + "to_role": "all", + "message_type": "CONSENSUS_CONFIRMED", + "subject": "Confirmed by coder", + "body": "", + "metadata": { + "consensus_reached": true + }, + "timestamp": "2026-04-23T05:54:22.772637+00:00", + "phase": "implement" + } +] \ No newline at end of file diff --git a/.egg-state/brc-history/issue-1907-v2-implement.md b/.egg-state/brc-history/issue-1907-v2-implement.md new file mode 100644 index 0000000000..eee88c8251 --- /dev/null +++ b/.egg-state/brc-history/issue-1907-v2-implement.md @@ -0,0 +1,1565 @@ +# BRC Consensus History — implement phase + +Generated: 2026-04-23T05:54:22Z +Pipeline: issue-1907-v2 + +### [2026-04-23T05:18:11Z] documenter (CONSENSUS_PROPOSE): Proposal from documenter + +Documented the gateway's upstream stream-reset resilience in docs/architecture/credential-injection.md: added an 'Upstream Stream Resilience' subsection under 'Gateway Proxy Endpoints' that explains the pre-stream bounded retry (transparent to the SDK) and mid-stream synthetic SSE error-event emission added to proxy_anthropic_messages() for #1907. Includes a comparison table of reset timing vs gateway behavior vs agent-visible effect, rationale for why full stream resumption is unsafe, retry bounds, and how the fix relates to/differs from #1883 and #1873. Also cross-linked the new section from the existing Implementation details bullet list. + +````yaml +id: 96552339-d692-43 +phase: implement +metadata: + payload: + summary: 'Documented the gateway''s upstream stream-reset resilience in docs/architecture/credential-injection.md: + added an ''Upstream Stream Resilience'' subsection under ''Gateway Proxy Endpoints'' + that explains the pre-stream bounded retry (transparent to the SDK) and mid-stream + synthetic SSE error-event emission added to proxy_anthropic_messages() for #1907. + Includes a comparison table of reset timing vs gateway behavior vs agent-visible + effect, rationale for why full stream resumption is unsafe, retry bounds, and + how the fix relates to/differs from #1883 and #1873. Also cross-linked the new + section from the existing Implementation details bullet list.' + attestation: {} + artifacts: + - docs/architecture/credential-injection.md + risk_considered: '' + commit_sha: db72789ee62acce28330beb54f075d51c4ad11d6 + files_changed: + - docs/architecture/credential-injection.md + tests_run: [] + tasks_satisfied: + - task-1-1 + - task-1-2 + version: 1 + commit_sha: db72789ee62acce28330beb54f075d51c4ad11d6 +```` + +### [2026-04-23T05:20:19Z] reviewer_code → documenter (CONSENSUS_ACK): ACK from reviewer_code for documenter + + +Reviewed commit db72789ee and the resulting docs/architecture/credential-injection.md section. Verified content against the contract tasks (task-1-1 pre-stream retry semantics, task-1-2 mid-stream graceful close behavior) and against the #1907 issue description. + +### What I verified +- New 'Upstream Stream Resilience' section is placed under 'Request Flow' adjacent to the existing /v1/messages description, so readers discover it in the right context. +- The reset-timing table correctly splits pre-stream (transparent retry, transparent to agent) vs mid-stream (synthetic error SSE frame), which matches the contract division of tasks. +- Mid-stream row states the four contract requirements — yield Anthropic-style 'event: error', feed through the accumulator, log.warning with container_id and bytes_seen, preserve finally upstream.close() + _capture_streaming_response — all in the order the contract specifies. +- The 'Why not full stream resumption?' paragraph accurately captures the root cause (no Anthropic resume tokens, partial wire orphan, risk of double-charging / interleaved generations). Matches the issue's recommendation. +- 'Bounded retry' paragraph correctly notes the single-attempt cap and bytes_seen == 0 gate, and routes exhausted failures to the pre-existing ConnectError/TimeoutException/Exception handlers, preserving the 502/504 contracts. +- Scope paragraph cleanly separates #1907 from #1883 (gateway pod restart) and #1873 (turn-1 wrapper retry). Useful for future triage. +- Markdown table and anchor link ([Upstream Stream Resilience](#upstream-stream-resilience)) render correctly in GFM. +- No code change in this commit — so no risk of behavior regression from the docs PR itself. + +### Non-blocking +- **docs/architecture/credential-injection.md:~68** — consider listing the structured log event names operators will search on ('upstream_reset_retry' INFO, 'upstream_reset_midstream' WARN). Right now the docs say 'logger.warning records the reset with container_id and bytes_seen' but don't give the event name, so an operator has to read gateway.py to know what to grep dashboards for. Low priority; the coder's gateway/README.md (if updated) may cover this. +- **docs/architecture/credential-injection.md:~70** — minor: the mid-stream row mentions 'feed it through the accumulator so the transcript still captures the failure' but doesn't explicitly state the error envelope's JSON shape. If gateway/README.md ends up documenting the exact wire format, a cross-link here would help SDK authors reason about parser changes. +- **Cross-consistency caveat** — the docs claim container_id is stamped onto the mid-stream log. That must match the final code; if the coder's implementation omits container_id (as dc835cefa from the prior #1907 branch did), the docs will be wrong and will need a follow-up. I'll catch that during coder review. + +Recommending ACK on the docs-only scope. The documented behavior matches the contract; any mismatch with final code is the coder's responsibility to reconcile and I'll flag it there. + + +````yaml +id: 30dbfc47-e4c3-47 +phase: implement +metadata: + payload: + artifact_references: + - db72789ee + - docs/architecture/credential-injection.md + reason: "\nReviewed commit db72789ee and the resulting docs/architecture/credential-injection.md\ + \ section. Verified content against the contract tasks (task-1-1 pre-stream\ + \ retry semantics, task-1-2 mid-stream graceful close behavior) and against\ + \ the #1907 issue description.\n\n### What I verified\n- New 'Upstream Stream\ + \ Resilience' section is placed under 'Request Flow' adjacent to the existing\ + \ /v1/messages description, so readers discover it in the right context.\n-\ + \ The reset-timing table correctly splits pre-stream (transparent retry, transparent\ + \ to agent) vs mid-stream (synthetic error SSE frame), which matches the contract\ + \ division of tasks.\n- Mid-stream row states the four contract requirements\ + \ \u2014 yield Anthropic-style 'event: error', feed through the accumulator,\ + \ log.warning with container_id and bytes_seen, preserve finally upstream.close()\ + \ + _capture_streaming_response \u2014 all in the order the contract specifies.\n\ + - The 'Why not full stream resumption?' paragraph accurately captures the root\ + \ cause (no Anthropic resume tokens, partial wire orphan, risk of double-charging\ + \ / interleaved generations). Matches the issue's recommendation.\n- 'Bounded\ + \ retry' paragraph correctly notes the single-attempt cap and bytes_seen ==\ + \ 0 gate, and routes exhausted failures to the pre-existing ConnectError/TimeoutException/Exception\ + \ handlers, preserving the 502/504 contracts.\n- Scope paragraph cleanly separates\ + \ #1907 from #1883 (gateway pod restart) and #1873 (turn-1 wrapper retry). Useful\ + \ for future triage.\n- Markdown table and anchor link ([Upstream Stream Resilience](#upstream-stream-resilience))\ + \ render correctly in GFM.\n- No code change in this commit \u2014 so no risk\ + \ of behavior regression from the docs PR itself.\n\n### Non-blocking\n- **docs/architecture/credential-injection.md:~68**\ + \ \u2014 consider listing the structured log event names operators will search\ + \ on ('upstream_reset_retry' INFO, 'upstream_reset_midstream' WARN). Right now\ + \ the docs say 'logger.warning records the reset with container_id and bytes_seen'\ + \ but don't give the event name, so an operator has to read gateway.py to know\ + \ what to grep dashboards for. Low priority; the coder's gateway/README.md (if\ + \ updated) may cover this.\n- **docs/architecture/credential-injection.md:~70**\ + \ \u2014 minor: the mid-stream row mentions 'feed it through the accumulator\ + \ so the transcript still captures the failure' but doesn't explicitly state\ + \ the error envelope's JSON shape. If gateway/README.md ends up documenting\ + \ the exact wire format, a cross-link here would help SDK authors reason about\ + \ parser changes.\n- **Cross-consistency caveat** \u2014 the docs claim container_id\ + \ is stamped onto the mid-stream log. That must match the final code; if the\ + \ coder's implementation omits container_id (as dc835cefa from the prior #1907\ + \ branch did), the docs will be wrong and will need a follow-up. I'll catch\ + \ that during coder review.\n\nRecommending ACK on the docs-only scope. The\ + \ documented behavior matches the contract; any mismatch with final code is\ + \ the coder's responsibility to reconcile and I'll flag it there.\n" + version: 1 +```` + +### [2026-04-23T05:20:19Z] orchestrator → documenter (STATUS): All reviewers have ACKed — ready to confirm + +All assigned reviewers have ACKed your proposal (version 1). Run `egg-orch consensus confirmed` to confirm. + +````yaml +id: 6f5d5c18-6228-46 +phase: implement +metadata: + fully_acked: true + version: 1 +```` + +### [2026-04-23T05:20:47Z] coder → tester (HANDOFF): Gateway stream-reset impl ready at dc5058a; test patch in agent-outputs + +Implemented task-1-1 + task-1-2 in gateway/gateway.py (commit dc5058a on egg/issue-1907-v2). Ready for task-1-3 tests. + +A ready-to-apply test patch covering all three acceptance cases is at .egg-state/agent-outputs/coder-test-additions-issue-1907.patch (committed as 5a46e8c9): + + git apply .egg-state/agent-outputs/coder-test-additions-issue-1907.patch + +The patch extends TestStreamingResponse in tests/gateway/test_anthropic_proxy.py with: + (a) test_pre_stream_reset_retries_once_and_succeeds - client.send() raises ReadError once, second attempt returns a valid iterator; asserts send called 2x and downstream sees clean 200 SSE + (b) test_pre_stream_first_chunk_reset_retries_and_succeeds - first iter_bytes() yields nothing and raises ReadError; asserts retry re-primes and produces normal stream + (c) test_mid_stream_reset_emits_synthetic_error_frame - iter_bytes yields one chunk then raises RemoteProtocolError; asserts downstream body contains original chunk followed by well-formed 'event: error' SSE frame and stream closes without exception + +All 49 tests in test_anthropic_proxy.py pass locally (pytest tests/gateway/test_anthropic_proxy.py). Feel free to adjust phrasing or add coverage - the patch is meant as a fast path to task-1-3 acceptance, not a mandate. + +````yaml +id: a7f5232c-1c7c-4d +phase: implement +```` + +### [2026-04-23T05:21:06Z] coder (CONSENSUS_PROPOSE): Proposal from coder + +Gateway proxy_anthropic_messages() is now resilient to upstream Anthropic TCP resets on /v1/messages streaming requests. (A) Pre-stream resets from client.send() or the first iter_bytes() call are retried once transparently so the downstream Claude SDK sees a clean 200 response. (B) Mid-stream resets are caught inside generate(), emitted as a well-formed Anthropic-style 'event: error' SSE frame, and fed through _SSEAccumulator so transcript capture still records the failed turn. upstream.close() and _capture_streaming_response() still run via finally. Covers tasks task-1-1 and task-1-2. task-1-3 (tests) handed off to tester via HANDOFF message a7f5232c with a ready-to-apply patch at .egg-state/agent-outputs/coder-test-additions-issue-1907.patch; all three tests + existing streaming tests pass locally (pytest tests/gateway/test_anthropic_proxy.py -> 49 passed). Linted clean (ruff). + +````yaml +id: 22570e76-b7b4-42 +phase: implement +metadata: + payload: + summary: 'Gateway proxy_anthropic_messages() is now resilient to upstream Anthropic + TCP resets on /v1/messages streaming requests. (A) Pre-stream resets from client.send() + or the first iter_bytes() call are retried once transparently so the downstream + Claude SDK sees a clean 200 response. (B) Mid-stream resets are caught inside + generate(), emitted as a well-formed Anthropic-style ''event: error'' SSE frame, + and fed through _SSEAccumulator so transcript capture still records the failed + turn. upstream.close() and _capture_streaming_response() still run via finally. + Covers tasks task-1-1 and task-1-2. task-1-3 (tests) handed off to tester via + HANDOFF message a7f5232c with a ready-to-apply patch at .egg-state/agent-outputs/coder-test-additions-issue-1907.patch; + all three tests + existing streaming tests pass locally (pytest tests/gateway/test_anthropic_proxy.py + -> 49 passed). Linted clean (ruff).' + attestation: {} + artifacts: + - gateway/gateway.py + - .egg-state/agent-outputs/coder-test-additions-issue-1907.patch + risk_considered: '' + commit_sha: 5a46e8c99a4c4db976fd45afca5eab40dd940718 + files_changed: + - gateway/gateway.py + - .egg-state/agent-outputs/coder-test-additions-issue-1907.patch + tests_run: + - tests/gateway/test_anthropic_proxy.py::TestStreamingResponse::test_streaming_request_detected + - tests/gateway/test_anthropic_proxy.py::TestStreamingResponse::test_streaming_content_type_forwarded + - tests/gateway/test_anthropic_proxy.py::TestStreamingResponse::test_pre_stream_reset_retries_once_and_succeeds + - tests/gateway/test_anthropic_proxy.py::TestStreamingResponse::test_pre_stream_first_chunk_reset_retries_and_succeeds + - tests/gateway/test_anthropic_proxy.py::TestStreamingResponse::test_mid_stream_reset_emits_synthetic_error_frame + tasks_satisfied: + - task-1-1 + - task-1-2 + version: 1 + commit_sha: 5a46e8c99a4c4db976fd45afca5eab40dd940718 +```` + +### [2026-04-23T05:23:36Z] reviewer_contract → coder (CONSENSUS_ACK): ACK from reviewer_contract for coder + + +### Criterion-by-criterion contract verification + +Reviewed coder commits dc5058ad5 (gateway fix) and 5a46e8c99 (test handoff patch) against the three tasks in .egg-state/contracts/issue-1907-v2.json. + +**[task-1-1] Pre-stream retry — VERIFIED** +- gateway/gateway.py:5261-5292 defines `_send_and_prime()` which calls `client.build_request` + `client.send(http_req, stream=True)`, then immediately calls `upstream_resp.iter_bytes()` and `next(iterator)` to pre-fetch the first chunk. Any `httpx.ReadError` / `httpx.RemoteProtocolError` from either client.send() or the first next() is caught; the failed upstream is closed (`upstream_resp.close()`); the exception is re-raised for the outer retry loop. +- gateway/gateway.py:5297-5312 wraps this in `for attempt in range(2)` — attempt 0 logs 'Upstream Anthropic connection reset before any byte was forwarded; retrying once' and continues; attempt 1 re-raises, falling through to the existing `except Exception` handler at line 5455 which returns a 502. This matches the contract requirement 'On second failure, fall through to the existing error-return path'. +- Retry is bounded to exactly one (`range(2)` = attempts 0 and 1). The request is fully rebuilt each attempt (`_send_and_prime` calls `client.build_request` anew), so a stale connection-pool entry cannot carry over. + +**[task-1-2] Mid-stream synthetic SSE error — VERIFIED** +- gateway/gateway.py:5347-5385 wraps the downstream-yield portion of `generate()` in `try/except (httpx.ReadError, httpx.RemoteProtocolError)`. The try block yields `first_chunk` (if not None) then iterates `primed_iterator`. On catch, it logs a warning with `container_id` and `bytes_seen` (both required by the task), builds an Anthropic-style payload `{"type": "error", "error": {"type": "api_error", "message": "upstream connection reset"}}`, encodes as `b"event: error\ndata: \n\n"`, feeds it through `_consume_chunk` (so the accumulator captures it), and yields it to downstream before returning cleanly. +- The shape matches what `_SSEAccumulator._process_event` handles at gateway.py:5114 (event_type == 'error'), so transcript capture round-trips the synthetic frame correctly. +- The original `finally: upstream.close()` + `_capture_streaming_response` block at lines 5386-5401 is preserved unchanged, so mid-stream reset still runs both. +- No retry on mid-stream — correct per the contract (Anthropic has no resume tokens; retrying after bytes have flowed would be unsafe). + +**[task-1-3] Three new tests in tests/gateway/test_anthropic_proxy.py — PENDING (tester hand-off)** +- The coder did NOT modify `tests/gateway/test_anthropic_proxy.py`; the commit message states 'tests/ is outside coder's file boundary' and delivers the three tests as `.egg-state/agent-outputs/coder-test-additions-issue-1907.patch` for the tester role to apply. +- The patch content itself satisfies the acceptance criteria: + - (a) `test_pre_stream_reset_retries_once_and_succeeds` (patch L18-69): mocks `client.send.side_effect = [ReadError, good_response]`, asserts `send.call_count == 2`, `build_request.call_count == 2`, downstream body has both SSE events and no `event: error`. + - (b) `test_pre_stream_first_chunk_reset_retries_and_succeeds` (patch L71-125): first response's iter_bytes raises ReadError on first next; second response streams normally. Asserts send twice, `bad_response.close.assert_called()`, downstream clean. + - (c) `test_mid_stream_reset_emits_synthetic_error_frame` (patch L127-179): iterator yields one chunk then raises `httpx.RemoteProtocolError`. Asserts send once (no retry), status 200, body contains original chunk then `event: error` then `api_error` then `upstream connection reset`, order verified via `data.index(first_chunk) < data.index(b"event: error")`, `mock_response.close.assert_called()`. +- Helper `_raising_iter` (patch L9-16) matches the task's 'small helper to wrap an iterator so it raises after N yielded chunks' requirement. +- Coder's commit message claims 'All three verified locally against commit dc5058a: pytest tests/gateway/test_anthropic_proxy.py -v -> 49 passed'. +- **task-1-3 will only be fully satisfied once the tester applies this patch (or writes equivalent tests) into tests/gateway/test_anthropic_proxy.py and CI confirms they pass.** My assigned producer is coder — this is flagged for the tester's scope, not a block on the coder. + +**Phase status consistency**: The contract's `phases[0].status` is still 'pending' and tasks have `status: pending`. Expected — contract-state updates happen after all producers reach CONFIRMED. No contract-integrity red flags on the coder's output. + +### Non-blocking observations +- gateway/gateway.py:5357 — catching `(httpx.ReadError, httpx.RemoteProtocolError)` inside the mid-stream try is exactly right, but an unrelated `httpx.NetworkError` from upstream (e.g. a WriteError) would still bubble out of `generate()` as before. Not required by the contract; noting for the record. +- gateway/gateway.py:5280-5283 — the inner `try/except StopIteration: first = None` correctly handles an empty upstream body (server returned 200 with zero bytes). Good defensive coding not spelled out in the contract. +- The `_send_and_prime` helper's `except Exception: pass` around `upstream_resp.close()` (5289-5291) silently swallows any close-error; acceptable since we are about to retry or re-raise the original reset. + + +````yaml +id: 834412fc-ced2-44 +phase: implement +metadata: + payload: + artifact_references: + - gateway/gateway.py + - .egg-state/agent-outputs/coder-test-additions-issue-1907.patch + reason: "\n### Criterion-by-criterion contract verification\n\nReviewed coder\ + \ commits dc5058ad5 (gateway fix) and 5a46e8c99 (test handoff patch) against\ + \ the three tasks in .egg-state/contracts/issue-1907-v2.json.\n\n**[task-1-1]\ + \ Pre-stream retry \u2014 VERIFIED**\n- gateway/gateway.py:5261-5292 defines\ + \ `_send_and_prime()` which calls `client.build_request` + `client.send(http_req,\ + \ stream=True)`, then immediately calls `upstream_resp.iter_bytes()` and `next(iterator)`\ + \ to pre-fetch the first chunk. Any `httpx.ReadError` / `httpx.RemoteProtocolError`\ + \ from either client.send() or the first next() is caught; the failed upstream\ + \ is closed (`upstream_resp.close()`); the exception is re-raised for the outer\ + \ retry loop.\n- gateway/gateway.py:5297-5312 wraps this in `for attempt in\ + \ range(2)` \u2014 attempt 0 logs 'Upstream Anthropic connection reset before\ + \ any byte was forwarded; retrying once' and continues; attempt 1 re-raises,\ + \ falling through to the existing `except Exception` handler at line 5455 which\ + \ returns a 502. This matches the contract requirement 'On second failure, fall\ + \ through to the existing error-return path'.\n- Retry is bounded to exactly\ + \ one (`range(2)` = attempts 0 and 1). The request is fully rebuilt each attempt\ + \ (`_send_and_prime` calls `client.build_request` anew), so a stale connection-pool\ + \ entry cannot carry over.\n\n**[task-1-2] Mid-stream synthetic SSE error \u2014\ + \ VERIFIED**\n- gateway/gateway.py:5347-5385 wraps the downstream-yield portion\ + \ of `generate()` in `try/except (httpx.ReadError, httpx.RemoteProtocolError)`.\ + \ The try block yields `first_chunk` (if not None) then iterates `primed_iterator`.\ + \ On catch, it logs a warning with `container_id` and `bytes_seen` (both required\ + \ by the task), builds an Anthropic-style payload `{\"type\": \"error\", \"\ + error\": {\"type\": \"api_error\", \"message\": \"upstream connection reset\"\ + }}`, encodes as `b\"event: error\\ndata: \\n\\n\"`, feeds it through `_consume_chunk`\ + \ (so the accumulator captures it), and yields it to downstream before returning\ + \ cleanly.\n- The shape matches what `_SSEAccumulator._process_event` handles\ + \ at gateway.py:5114 (event_type == 'error'), so transcript capture round-trips\ + \ the synthetic frame correctly.\n- The original `finally: upstream.close()`\ + \ + `_capture_streaming_response` block at lines 5386-5401 is preserved unchanged,\ + \ so mid-stream reset still runs both.\n- No retry on mid-stream \u2014 correct\ + \ per the contract (Anthropic has no resume tokens; retrying after bytes have\ + \ flowed would be unsafe).\n\n**[task-1-3] Three new tests in tests/gateway/test_anthropic_proxy.py\ + \ \u2014 PENDING (tester hand-off)**\n- The coder did NOT modify `tests/gateway/test_anthropic_proxy.py`;\ + \ the commit message states 'tests/ is outside coder's file boundary' and delivers\ + \ the three tests as `.egg-state/agent-outputs/coder-test-additions-issue-1907.patch`\ + \ for the tester role to apply.\n- The patch content itself satisfies the acceptance\ + \ criteria:\n - (a) `test_pre_stream_reset_retries_once_and_succeeds` (patch\ + \ L18-69): mocks `client.send.side_effect = [ReadError, good_response]`, asserts\ + \ `send.call_count == 2`, `build_request.call_count == 2`, downstream body has\ + \ both SSE events and no `event: error`.\n - (b) `test_pre_stream_first_chunk_reset_retries_and_succeeds`\ + \ (patch L71-125): first response's iter_bytes raises ReadError on first next;\ + \ second response streams normally. Asserts send twice, `bad_response.close.assert_called()`,\ + \ downstream clean.\n - (c) `test_mid_stream_reset_emits_synthetic_error_frame`\ + \ (patch L127-179): iterator yields one chunk then raises `httpx.RemoteProtocolError`.\ + \ Asserts send once (no retry), status 200, body contains original chunk then\ + \ `event: error` then `api_error` then `upstream connection reset`, order verified\ + \ via `data.index(first_chunk) < data.index(b\"event: error\")`, `mock_response.close.assert_called()`.\n\ + - Helper `_raising_iter` (patch L9-16) matches the task's 'small helper to wrap\ + \ an iterator so it raises after N yielded chunks' requirement.\n- Coder's commit\ + \ message claims 'All three verified locally against commit dc5058a: pytest\ + \ tests/gateway/test_anthropic_proxy.py -v -> 49 passed'.\n- **task-1-3 will\ + \ only be fully satisfied once the tester applies this patch (or writes equivalent\ + \ tests) into tests/gateway/test_anthropic_proxy.py and CI confirms they pass.**\ + \ My assigned producer is coder \u2014 this is flagged for the tester's scope,\ + \ not a block on the coder.\n\n**Phase status consistency**: The contract's\ + \ `phases[0].status` is still 'pending' and tasks have `status: pending`. Expected\ + \ \u2014 contract-state updates happen after all producers reach CONFIRMED.\ + \ No contract-integrity red flags on the coder's output.\n\n### Non-blocking\ + \ observations\n- gateway/gateway.py:5357 \u2014 catching `(httpx.ReadError,\ + \ httpx.RemoteProtocolError)` inside the mid-stream try is exactly right, but\ + \ an unrelated `httpx.NetworkError` from upstream (e.g. a WriteError) would\ + \ still bubble out of `generate()` as before. Not required by the contract;\ + \ noting for the record.\n- gateway/gateway.py:5280-5283 \u2014 the inner `try/except\ + \ StopIteration: first = None` correctly handles an empty upstream body (server\ + \ returned 200 with zero bytes). Good defensive coding not spelled out in the\ + \ contract.\n- The `_send_and_prime` helper's `except Exception: pass` around\ + \ `upstream_resp.close()` (5289-5291) silently swallows any close-error; acceptable\ + \ since we are about to retry or re-raise the original reset.\n" + version: 1 +```` + +### [2026-04-23T05:23:42Z] reviewer_contract (CONSENSUS_CONFIRMED): Confirmed by reviewer_contract (pending_acks) + +Agent reviewer_contract cannot confirm: producers ['tester'] have never proposed (proposal_version == 0). All producers must propose before any agent can confirm consensus. + +````yaml +id: 5b170f39-0a7d-4a +phase: implement +metadata: + pending_acks: true +```` + +### [2026-04-23T05:26:21Z] reviewer_code → coder (CONSENSUS_ACK): ACK from reviewer_code for coder + + +Reviewed both coder commits end-to-end: dc5058ad5 (gateway.py code change, +122 -22) and 5a46e8c99 (test hand-off patch for tester role). + +### What I verified + +**Pre-stream retry loop (task-1-1)** +- _send_and_prime() correctly encapsulates send + iter_bytes + first-chunk peek. The inner try/except catches ReadError/RemoteProtocolError from iter_bytes()/next(iterator) and closes upstream_resp before re-raising so the retry does not leak the failed connection. +- ReadError raised from client.send() itself is outside the inner try, so it propagates out of _send_and_prime without hitting the close block — but that's safe because upstream_resp was never assigned (no leak). Outer retry loop then catches and retries. This matches the 'client.send() raises' scenario in the contract. +- Outer loop 'for attempt in range(2)' is bounded and has exactly MAX_PRE_STREAM_RETRIES=1 semantics. On attempt=0 ReadError: logs warning, continue. On attempt=1 ReadError: raise re-raises to outer handler. +- Retry rebuilds the request with the same headers + body (both captured before the loop), so request replay is exact including injected x-api-key / OAuth. No credential re-injection race. +- ConnectError / TimeoutException from send() propagate past the retry catch and hit their existing 502 / 504 handlers unchanged — confirmed by reading the outer exception chain at gateway.py:5433-5464. + +**Mid-stream graceful close (task-1-2)** +- generate() wraps 'yield first_chunk + for chunk in primed_iterator' in try/except for (ReadError, RemoteProtocolError). On catch, emits a well-formed SSE envelope (b'event: error\ndata: {...}\n\n') with Anthropic-style 'type: api_error' payload. +- The synthetic error frame IS fed through _consume_chunk before being yielded, so the _SSEAccumulator parses it as an 'error' event (accumulator recognizes event_type == 'error' at gateway.py:5114 and appends it to _error_blocks with stop_reason='error'). The transcript buffer therefore captures the failed turn. +- logger.warning carries container_id + bytes_seen + error — matches the contract's acceptance fields exactly. +- finally block runs upstream.close() + _capture_streaming_response unchanged; mid-stream error path doesn't bypass transcript capture. + +**Test hand-off (task-1-3)** +- .egg-state/agent-outputs/coder-test-additions-issue-1907.patch adds three tests to TestStreamingResponse covering (a) send()-raises-then-retries, (b) first-iter_bytes()-raises-then-retries, (c) mid-stream RemoteProtocolError → synthetic error frame. Contract acceptance criteria met. +- _raising_iter(chunks, error) helper is the N-chunk wrapper the contract asked for. +- Assertions verify: send.call_count, build_request.call_count, response body contents, bad_response.close() called before retry, absence of 'event: error' on successful retry, presence on mid-stream reset, ordering (first chunk before error frame), mock_response.close() called in finally. +- json.dumps default separators produce '"type": "api_error"' (space after colon) — matches the test's literal assertion b'"type": "api_error"'. Verified via default json.dumps behavior. + +**Safety / correctness checks** +- Synthetic error frame contains no user-controlled data — no injection vector. +- Retry does not amplify load beyond 2x per affected request; no unbounded loop. +- httpx.ReadError and httpx.RemoteProtocolError are both real symbols (verified at module level, gateway.py:47 imports httpx; RemoteProtocolError is httpx.ProtocolError subclass). +- _SSEAccumulator.feed() tolerates multi-line frames and accumulates across chunk boundaries; feeding the synthetic frame in one shot is fine. +- StopIteration on next(iterator) correctly sets first_chunk=None and is handled by 'if first_chunk is not None' guard in generate(). +- Empty first_chunk (b'') falls through to yield b'' which is harmless downstream. + +### Non-blocking + +- **gateway.py:5312** — when pre-stream retry exhausts, the ReadError / RemoteProtocolError re-raises into the generic 'except Exception' handler (line 5455-5464), producing message 'Anthropic API proxy error: ...' and HTTP 502. Consider adding a dedicated 'except (httpx.ReadError, httpx.RemoteProtocolError)' handler right before the generic 'except Exception' so operators get 'Anthropic API connection reset: ...' as the error message, and so the retry-exhaustion case emits a distinct log line rather than the generic 'Anthropic API proxy error' exception log. Not blocking — 502 is the correct status and the generic handler does log. + +- **gateway.py:5348** — 'nonlocal bytes_seen' inside generate() is unused (bytes_seen is only read there, never assigned). Harmless but misleading. Safe to drop. + +- **gateway.py:5303** and **gateway.py:5365** — log message is a descriptive sentence rather than a structured event name. Operators grepping dashboards for a specific event (e.g. 'upstream_reset_retry' / 'upstream_reset_midstream') will have to match on substrings of the sentence. Consider using short event names as the first positional arg with the descriptive text moved to a 'message=' kwarg, for consistency with other gateway event-style logs. Not blocking; the structured kwargs (container_id, bytes_seen, error) are present, which is the important part. + +- **Test hand-off pattern** — tests live in a patch file under .egg-state/agent-outputs/ rather than in tests/gateway/test_anthropic_proxy.py directly. Tester role is expected to apply it. That's the standard boundary split, but it means task-1-3 isn't fully landed until the tester runs 'git apply'. I'll verify the applied form when the tester proposes. + +Recommending ACK. The implementation satisfies both contract tasks (pre-stream retry and mid-stream graceful close), feeds the synthetic frame through the accumulator, logs with container_id + bytes_seen as required, and the finally/close semantics are preserved. The hand-off tests cover the three contract scenarios correctly. + + +````yaml +id: cb5e833b-c022-46 +phase: implement +metadata: + payload: + artifact_references: + - dc5058ad5 + - 5a46e8c99 + - gateway/gateway.py + - .egg-state/agent-outputs/coder-test-additions-issue-1907.patch + reason: "\nReviewed both coder commits end-to-end: dc5058ad5 (gateway.py code\ + \ change, +122 -22) and 5a46e8c99 (test hand-off patch for tester role).\n\n\ + ### What I verified\n\n**Pre-stream retry loop (task-1-1)**\n- _send_and_prime()\ + \ correctly encapsulates send + iter_bytes + first-chunk peek. The inner try/except\ + \ catches ReadError/RemoteProtocolError from iter_bytes()/next(iterator) and\ + \ closes upstream_resp before re-raising so the retry does not leak the failed\ + \ connection.\n- ReadError raised from client.send() itself is outside the inner\ + \ try, so it propagates out of _send_and_prime without hitting the close block\ + \ \u2014 but that's safe because upstream_resp was never assigned (no leak).\ + \ Outer retry loop then catches and retries. This matches the 'client.send()\ + \ raises' scenario in the contract.\n- Outer loop 'for attempt in range(2)'\ + \ is bounded and has exactly MAX_PRE_STREAM_RETRIES=1 semantics. On attempt=0\ + \ ReadError: logs warning, continue. On attempt=1 ReadError: raise re-raises\ + \ to outer handler.\n- Retry rebuilds the request with the same headers + body\ + \ (both captured before the loop), so request replay is exact including injected\ + \ x-api-key / OAuth. No credential re-injection race.\n- ConnectError / TimeoutException\ + \ from send() propagate past the retry catch and hit their existing 502 / 504\ + \ handlers unchanged \u2014 confirmed by reading the outer exception chain at\ + \ gateway.py:5433-5464.\n\n**Mid-stream graceful close (task-1-2)**\n- generate()\ + \ wraps 'yield first_chunk + for chunk in primed_iterator' in try/except for\ + \ (ReadError, RemoteProtocolError). On catch, emits a well-formed SSE envelope\ + \ (b'event: error\\ndata: {...}\\n\\n') with Anthropic-style 'type: api_error'\ + \ payload.\n- The synthetic error frame IS fed through _consume_chunk before\ + \ being yielded, so the _SSEAccumulator parses it as an 'error' event (accumulator\ + \ recognizes event_type == 'error' at gateway.py:5114 and appends it to _error_blocks\ + \ with stop_reason='error'). The transcript buffer therefore captures the failed\ + \ turn.\n- logger.warning carries container_id + bytes_seen + error \u2014 matches\ + \ the contract's acceptance fields exactly.\n- finally block runs upstream.close()\ + \ + _capture_streaming_response unchanged; mid-stream error path doesn't bypass\ + \ transcript capture.\n\n**Test hand-off (task-1-3)**\n- .egg-state/agent-outputs/coder-test-additions-issue-1907.patch\ + \ adds three tests to TestStreamingResponse covering (a) send()-raises-then-retries,\ + \ (b) first-iter_bytes()-raises-then-retries, (c) mid-stream RemoteProtocolError\ + \ \u2192 synthetic error frame. Contract acceptance criteria met.\n- _raising_iter(chunks,\ + \ error) helper is the N-chunk wrapper the contract asked for.\n- Assertions\ + \ verify: send.call_count, build_request.call_count, response body contents,\ + \ bad_response.close() called before retry, absence of 'event: error' on successful\ + \ retry, presence on mid-stream reset, ordering (first chunk before error frame),\ + \ mock_response.close() called in finally.\n- json.dumps default separators\ + \ produce '\"type\": \"api_error\"' (space after colon) \u2014 matches the test's\ + \ literal assertion b'\"type\": \"api_error\"'. Verified via default json.dumps\ + \ behavior.\n\n**Safety / correctness checks**\n- Synthetic error frame contains\ + \ no user-controlled data \u2014 no injection vector.\n- Retry does not amplify\ + \ load beyond 2x per affected request; no unbounded loop.\n- httpx.ReadError\ + \ and httpx.RemoteProtocolError are both real symbols (verified at module level,\ + \ gateway.py:47 imports httpx; RemoteProtocolError is httpx.ProtocolError subclass).\n\ + - _SSEAccumulator.feed() tolerates multi-line frames and accumulates across\ + \ chunk boundaries; feeding the synthetic frame in one shot is fine.\n- StopIteration\ + \ on next(iterator) correctly sets first_chunk=None and is handled by 'if first_chunk\ + \ is not None' guard in generate().\n- Empty first_chunk (b'') falls through\ + \ to yield b'' which is harmless downstream.\n\n### Non-blocking\n\n- **gateway.py:5312**\ + \ \u2014 when pre-stream retry exhausts, the ReadError / RemoteProtocolError\ + \ re-raises into the generic 'except Exception' handler (line 5455-5464), producing\ + \ message 'Anthropic API proxy error: ...' and HTTP 502. Consider adding a dedicated\ + \ 'except (httpx.ReadError, httpx.RemoteProtocolError)' handler right before\ + \ the generic 'except Exception' so operators get 'Anthropic API connection\ + \ reset: ...' as the error message, and so the retry-exhaustion case emits a\ + \ distinct log line rather than the generic 'Anthropic API proxy error' exception\ + \ log. Not blocking \u2014 502 is the correct status and the generic handler\ + \ does log.\n\n- **gateway.py:5348** \u2014 'nonlocal bytes_seen' inside generate()\ + \ is unused (bytes_seen is only read there, never assigned). Harmless but misleading.\ + \ Safe to drop.\n\n- **gateway.py:5303** and **gateway.py:5365** \u2014 log\ + \ message is a descriptive sentence rather than a structured event name. Operators\ + \ grepping dashboards for a specific event (e.g. 'upstream_reset_retry' / 'upstream_reset_midstream')\ + \ will have to match on substrings of the sentence. Consider using short event\ + \ names as the first positional arg with the descriptive text moved to a 'message='\ + \ kwarg, for consistency with other gateway event-style logs. Not blocking;\ + \ the structured kwargs (container_id, bytes_seen, error) are present, which\ + \ is the important part.\n\n- **Test hand-off pattern** \u2014 tests live in\ + \ a patch file under .egg-state/agent-outputs/ rather than in tests/gateway/test_anthropic_proxy.py\ + \ directly. Tester role is expected to apply it. That's the standard boundary\ + \ split, but it means task-1-3 isn't fully landed until the tester runs 'git\ + \ apply'. I'll verify the applied form when the tester proposes.\n\nRecommending\ + \ ACK. The implementation satisfies both contract tasks (pre-stream retry and\ + \ mid-stream graceful close), feeds the synthetic frame through the accumulator,\ + \ logs with container_id + bytes_seen as required, and the finally/close semantics\ + \ are preserved. The hand-off tests cover the three contract scenarios correctly.\n" + version: 1 +```` + +### [2026-04-23T05:26:44Z] tester → coder (CONSENSUS_ACK): ACK from tester for coder + + +Reviewed gateway/gateway.py changes at dc5058ad5 (proxy_anthropic_messages streaming branch, lines 5241–5408) and the handoff test patch at 5a46e8c99. Exercised the new code paths end-to-end with four new pytest cases in tests/gateway/test_anthropic_proxy.py (all 50 tests in the file pass). + +### Correctness verification +- **Task 1-1 (pre-stream retry)**: `_send_and_prime()` cleanly factors out build_request/send/iter_bytes()/next(), wraps only that scope in `except (httpx.ReadError, httpx.RemoteProtocolError)`, closes the failed upstream before re-raising so the caller's retry opens a fresh connection (no half-open sockets leaked to the httpx connection pool). The outer `for attempt in range(2)` loop is bounded to exactly one retry; on attempt==1 the `raise` re-propagates and the outer `except Exception` handler returns 502. StopIteration during prime is translated to `first=None`, so an empty upstream body does not trigger spurious retry. Verified by test_streaming_send_reset_retries_once, test_streaming_first_chunk_reset_retries_once, and test_streaming_send_reset_retry_exhausted_returns_502. +- **Task 1-2 (mid-stream synthetic error)**: the nested try/except inside `generate()` catches ReadError/RemoteProtocolError raised by either the first_chunk path or the subsequent `for chunk in primed_iterator` iteration. Emits a well-formed Anthropic-style SSE frame (`event: error\ndata: {"type":"error","error":{"type":"api_error","message":"upstream connection reset"}}\n\n`) that parses as valid JSON and matches the shape the Claude SDK's error handler expects. The frame is fed through `_consume_chunk()` so `_SSEAccumulator` records it (stop_reason='error' branch in _process_event), and the `finally: upstream.close()` + `_capture_streaming_response` postamble still runs. logger.warning carries container_id and bytes_seen. Verified by test_streaming_midstream_reset_yields_synthetic_error_frame with a JSON-parse assertion on the synthetic payload. + +### Defensive behaviors confirmed +- Failed upstream is closed inside `_send_and_prime`'s except before re-raise; retry opens a fresh connection. +- No downstream duplication of first_chunk (it's yielded once, then the for loop continues the same primed_iterator). +- Exhaustion falls through to the existing generic exception handler → 502 with api_error payload (not an infinite loop). +- mypy diff against baseline: 78 errors in both — no new type errors introduced. + +### Non-blocking +- **gateway/gateway.py:5370** — the log's `bytes_seen` counter is only advanced by `_consume_chunk` when `accumulator is not None` (i.e., when container_id is set). In no-session requests the log line will always show bytes_seen=0 even if several chunks flowed. Minor — operator traffic mostly has container_id — but worth noting if someone later tries to use the log for mid-stream-reset rate analysis on anonymous traffic. +- **gateway/gateway.py:5281** — `first = next(iterator)` is assigned inside the inner try, so StopIteration (empty body) returns first=None, which is correct but subtle. A one-line comment noting "empty-body upstream → first_chunk is None, for loop is a no-op" would aid future readers. Existing docstring mentions it; pure polish. + +Nothing blocking. The implementation is minimal, scoped, well-commented, and matches the contract exactly. Clean ACK. + + +````yaml +id: 0757bb0d-8016-4f +phase: implement +metadata: + payload: + artifact_references: + - gateway/gateway.py + - .egg-state/agent-outputs/coder-test-additions-issue-1907.patch + reason: "\nReviewed gateway/gateway.py changes at dc5058ad5 (proxy_anthropic_messages\ + \ streaming branch, lines 5241\u20135408) and the handoff test patch at 5a46e8c99.\ + \ Exercised the new code paths end-to-end with four new pytest cases in tests/gateway/test_anthropic_proxy.py\ + \ (all 50 tests in the file pass).\n\n### Correctness verification\n- **Task\ + \ 1-1 (pre-stream retry)**: `_send_and_prime()` cleanly factors out build_request/send/iter_bytes()/next(),\ + \ wraps only that scope in `except (httpx.ReadError, httpx.RemoteProtocolError)`,\ + \ closes the failed upstream before re-raising so the caller's retry opens a\ + \ fresh connection (no half-open sockets leaked to the httpx connection pool).\ + \ The outer `for attempt in range(2)` loop is bounded to exactly one retry;\ + \ on attempt==1 the `raise` re-propagates and the outer `except Exception` handler\ + \ returns 502. StopIteration during prime is translated to `first=None`, so\ + \ an empty upstream body does not trigger spurious retry. Verified by test_streaming_send_reset_retries_once,\ + \ test_streaming_first_chunk_reset_retries_once, and test_streaming_send_reset_retry_exhausted_returns_502.\n\ + - **Task 1-2 (mid-stream synthetic error)**: the nested try/except inside `generate()`\ + \ catches ReadError/RemoteProtocolError raised by either the first_chunk path\ + \ or the subsequent `for chunk in primed_iterator` iteration. Emits a well-formed\ + \ Anthropic-style SSE frame (`event: error\\ndata: {\"type\":\"error\",\"error\"\ + :{\"type\":\"api_error\",\"message\":\"upstream connection reset\"}}\\n\\n`)\ + \ that parses as valid JSON and matches the shape the Claude SDK's error handler\ + \ expects. The frame is fed through `_consume_chunk()` so `_SSEAccumulator`\ + \ records it (stop_reason='error' branch in _process_event), and the `finally:\ + \ upstream.close()` + `_capture_streaming_response` postamble still runs. logger.warning\ + \ carries container_id and bytes_seen. Verified by test_streaming_midstream_reset_yields_synthetic_error_frame\ + \ with a JSON-parse assertion on the synthetic payload.\n\n### Defensive behaviors\ + \ confirmed\n- Failed upstream is closed inside `_send_and_prime`'s except before\ + \ re-raise; retry opens a fresh connection.\n- No downstream duplication of\ + \ first_chunk (it's yielded once, then the for loop continues the same primed_iterator).\n\ + - Exhaustion falls through to the existing generic exception handler \u2192\ + \ 502 with api_error payload (not an infinite loop).\n- mypy diff against baseline:\ + \ 78 errors in both \u2014 no new type errors introduced.\n\n### Non-blocking\n\ + - **gateway/gateway.py:5370** \u2014 the log's `bytes_seen` counter is only\ + \ advanced by `_consume_chunk` when `accumulator is not None` (i.e., when container_id\ + \ is set). In no-session requests the log line will always show bytes_seen=0\ + \ even if several chunks flowed. Minor \u2014 operator traffic mostly has container_id\ + \ \u2014 but worth noting if someone later tries to use the log for mid-stream-reset\ + \ rate analysis on anonymous traffic.\n- **gateway/gateway.py:5281** \u2014\ + \ `first = next(iterator)` is assigned inside the inner try, so StopIteration\ + \ (empty body) returns first=None, which is correct but subtle. A one-line comment\ + \ noting \"empty-body upstream \u2192 first_chunk is None, for loop is a no-op\"\ + \ would aid future readers. Existing docstring mentions it; pure polish.\n\n\ + Nothing blocking. The implementation is minimal, scoped, well-commented, and\ + \ matches the contract exactly. Clean ACK.\n" + version: 1 +```` + +### [2026-04-23T05:26:44Z] orchestrator → coder (STATUS): All reviewers have ACKed — ready to confirm + +All assigned reviewers have ACKed your proposal (version 1). Run `egg-orch consensus confirmed` to confirm. + +````yaml +id: ce567672-653b-46 +phase: implement +metadata: + fully_acked: true + version: 1 +```` + +### [2026-04-23T05:26:55Z] coder (CONSENSUS_CONFIRMED): Confirmed by coder (pending_acks) + +Agent coder cannot confirm: producers ['tester'] have never proposed (proposal_version == 0). All producers must propose before any agent can confirm consensus. + +````yaml +id: 7786c580-03aa-43 +phase: implement +metadata: + pending_acks: true +```` + +### [2026-04-23T05:27:42Z] orchestrator (AGENT_FAILED): Agent coder failed + +Container exited with code 1 + +````yaml +id: e3cef6b6-5b5b-43 +phase: implement +```` + +### [2026-04-23T05:28:20Z] orchestrator (OVERSEER_ALERT): overseer_restart: overseer [info] + +Overseer container was respawned. Old container 2a098b4c-bc4 exited with code 1. New container 3c43e0dd-b4f is now running. + +````yaml +id: 16cbfb6c-8cc0-43 +phase: implement +metadata: + exit_code: 1 + old_container_id: 2a098b4c-bc45-4d73-ba0a-1edcd49e6053 + new_container_id: 3c43e0dd-b4f8-423e-92bf-f98417a211dc + log_tail: "2026-04-23 05:25:45 [INFO ] egg-agent: Tool result event_type=tool_result\ + \ tool_use_id=toolu_01FwPHxywtMFC6H55fCcctMw is_error=False content=\"{\\\"cycle\\\ + \": 1, \\\"ts\\\": \\\"2026-04-23T05:25:45.854088+00:00\\\", \\\"status\\\": \\\ + \"running\\\", \\\"...\" [/opt/egg-runtime/shared/egg_agent/client.py:291]\n2026-04-23\ + \ 05:25:50 [INFO ] egg-agent: Assistant message event_type=assistant event_subtype=text\ + \ text=\"**Cycle 12:** Same state \u2014 tester still `WORKING` (~4.5 min since\ + \ coder hande...\" [/opt/egg-runtime/shared/egg_agent/client.py:266]\n2026-04-23\ + \ 05:25:51 [INFO ] egg-agent: Tool call event_type=tool_use tool_name=Bash\ + \ tool_use_id=toolu_01NCy6HQauhBMVk9Y8oSuvet input=\"{\\\"command\\\": \\\"sleep\ + \ 60 && python3 /opt/egg-runtime/sandbox/overseer_monitor.py...\" [/opt/egg-runtime/shared/egg_agent/client.py:258]\n\ + 2026-04-23 05:26:51 [INFO ] egg-agent: Tool result event_type=tool_result tool_use_id=toolu_01NCy6HQauhBMVk9Y8oSuvet\ + \ is_error=False content=\"{\\\"cycle\\\": 1, \\\"ts\\\": \\\"2026-04-23T05:26:51.766136+00:00\\\ + \", \\\"status\\\": \\\"running\\\", \\\"...\" [/opt/egg-runtime/shared/egg_agent/client.py:291]\n\ + **Action**: No intervention needed. Tester is actively `WORKING` \u2014 monitoring\ + \ for tester proposal which will unblock consensus completion.**Cycle 12:** Same\ + \ state \u2014 tester still `WORKING` (~4.5 min since coder handed off patch).\ + \ Both reviewers `REVIEWING`. Waiting for tester proposal to unblock consensus.**Cycle\ + \ 13 \u2014 Small State Progression!**\n- `tester.reviewer_phase` advanced: `WORKING`\ + \ \u2192 `REVIEWING`\n- `tester.producer_phase` still `WORKING` \u2014 tester\ + \ is concurrently reviewing other proposals while still implementing their test\ + \ additions\n- This is valid BRC behavior; tester has dual producer+reviewer roles\n\ + - **Still blocked**: tester must PROPOSE before consensus can complete\n\n2026-04-23\ + \ 05:27:00 [INFO ] egg-agent: Assistant message event_type=assistant event_subtype=text\ + \ text=\"**Cycle 13 \u2014 Small State Progression!** - `tester.reviewer_phase`\ + \ advanced: `...\" [/opt/egg-runtime/shared/egg_agent/client.py:266]\n2026-04-23\ + \ 05:27:01 [INFO ] egg-agent: Tool call event_type=tool_use tool_name=Bash\ + \ tool_use_id=toolu_01TAQwgBuW6MD5jPJB4AgmQF input=\"{\\\"command\\\": \\\"sleep\ + \ 60 && python3 /opt/egg-runtime/sandbox/overseer_monitor.py...\" [/opt/egg-runtime/shared/egg_agent/client.py:258]\n\ + 2026-04-23 05:28:01 [INFO ] egg-agent: Tool result event_type=tool_result tool_use_id=toolu_01TAQwgBuW6MD5jPJB4AgmQF\ + \ is_error=False content=\"{\\\"cycle\\\": 1, \\\"ts\\\": \\\"2026-04-23T05:28:01.390060+00:00\\\ + \", \\\"status\\\": \\\"running\\\", \\\"...\" [/opt/egg-runtime/shared/egg_agent/client.py:291]\n\ + 2026-04-23 05:28:03 [INFO ] egg-agent: Assistant message event_type=assistant\ + \ event_subtype=text text=\"You've hit your limit \xB7 resets 8am (UTC)\" [/opt/egg-runtime/shared/egg_agent/client.py:266]\n\ + 2026-04-23 05:28:03 [INFO ] egg-agent: Agent completed event_type=system event_subtype=result\ + \ model=claude-sonnet-4-6 session_id=c482e5ac-b5dd-43ea-8632-f7d632e8c616 cost_usd=1.6430545000000003\ + \ num_turns=27 duration_ms=828836 success=False error=\"You've hit your limit\ + \ \xB7 resets 8am (UTC)\" [/opt/egg-runtime/shared/egg_agent/client.py:317]\n\ + an error occurred during closing of asynchronous generator \nasyncgen: \nRuntimeError:\ + \ aclose(): asynchronous generator is already running\nYou've hit your limit \xB7\ + \ resets 8am (UTC)\nAll healthy. Continuing to monitor.You've hit your limit \xB7\ + \ resets 8am (UTC)You've hit your limit \xB7 resets 8am (UTC)" + respawn_attempt: 1 + max_respawns: 3 +```` + +### [2026-04-23T05:28:50Z] orchestrator (OVERSEER_ALERT): overseer_restart: overseer [info] + +Overseer container was respawned. Old container 3c43e0dd-b4f exited with code 1. New container 8dae5a38-e92 is now running. + +````yaml +id: 2f1d2b77-822e-4b +phase: implement +metadata: + exit_code: 1 + old_container_id: 3c43e0dd-b4f8-423e-92bf-f98417a211dc + new_container_id: 8dae5a38-e920-4a1b-b010-bf079d6bdaa6 + log_tail: "2026-04-23 05:28:21 [INFO ] egg-agent: Agent session init event_type=system\ + \ event_subtype=init model=sonnet cwd= permission_mode=bypassPermissions max_turns=2000\ + \ timeout=7200 setting_sources=\"['project', 'user']\" disallowed_tools=[] sdk=claude_agent_sdk\ + \ [/opt/egg-runtime/shared/egg_agent/client.py:215]\n2026-04-23 05:28:22 [INFO\ + \ ] egg-agent: Assistant message event_type=assistant event_subtype=text text=\"\ + You've hit your limit \xB7 resets 8am (UTC)\" [/opt/egg-runtime/shared/egg_agent/client.py:266]\n\ + 2026-04-23 05:28:22 [INFO ] egg-agent: Agent completed event_type=system event_subtype=result\ + \ model= session_id=9ed97b09-9a8f-479f-9c4f-23436ed73246 cost_usd=0\ + \ num_turns=1 duration_ms=691 success=False error=\"You've hit your limit \xB7\ + \ resets 8am (UTC)\" [/opt/egg-runtime/shared/egg_agent/client.py:317]\nan error\ + \ occurred during closing of asynchronous generator \nasyncgen: \nRuntimeError: aclose(): asynchronous generator is already\ + \ running\nYou've hit your limit \xB7 resets 8am (UTC)\nYou've hit your limit\ + \ \xB7 resets 8am (UTC)You've hit your limit \xB7 resets 8am (UTC)" + respawn_attempt: 2 + max_respawns: 3 +```` + +### [2026-04-23T05:29:21Z] orchestrator (OVERSEER_ALERT): overseer_restart: overseer [info] + +Overseer container was respawned. Old container 8dae5a38-e92 exited with code 1. New container ecc33b65-a7b is now running. + +````yaml +id: e21533bb-fb59-44 +phase: implement +metadata: + exit_code: 1 + old_container_id: 8dae5a38-e920-4a1b-b010-bf079d6bdaa6 + new_container_id: ecc33b65-a7b1-46b0-9c6b-25654bb6038a + log_tail: "2026-04-23 05:28:51 [INFO ] egg-agent: Agent session init event_type=system\ + \ event_subtype=init model=sonnet cwd= permission_mode=bypassPermissions max_turns=2000\ + \ timeout=7200 setting_sources=\"['project', 'user']\" disallowed_tools=[] sdk=claude_agent_sdk\ + \ [/opt/egg-runtime/shared/egg_agent/client.py:215]\n2026-04-23 05:28:52 [INFO\ + \ ] egg-agent: Assistant message event_type=assistant event_subtype=text text=\"\ + You've hit your limit \xB7 resets 8am (UTC)\" [/opt/egg-runtime/shared/egg_agent/client.py:266]\n\ + 2026-04-23 05:28:52 [INFO ] egg-agent: Agent completed event_type=system event_subtype=result\ + \ model= session_id=689678d5-0cfe-4625-ac70-0f1f825be180 cost_usd=0\ + \ num_turns=1 duration_ms=563 success=False error=\"You've hit your limit \xB7\ + \ resets 8am (UTC)\" [/opt/egg-runtime/shared/egg_agent/client.py:317]\nan error\ + \ occurred during closing of asynchronous generator \nasyncgen: \nRuntimeError: aclose(): asynchronous generator is already\ + \ running\nYou've hit your limit \xB7 resets 8am (UTC)\nYou've hit your limit\ + \ \xB7 resets 8am (UTC)You've hit your limit \xB7 resets 8am (UTC)" + respawn_attempt: 3 + max_respawns: 3 +```` + +### [2026-04-23T05:31:05Z] orchestrator (AGENT_FAILED): Agent documenter failed + +Container exited with code 1 + +````yaml +id: 2acb7ed3-8a00-47 +phase: implement +```` + +### [2026-04-23T05:31:49Z] orchestrator (AGENT_FAILED): Agent reviewer_contract failed + +Container exited with code 1 + +````yaml +id: 276dc5ff-e1fb-49 +phase: implement +```` + +### [2026-04-23T05:31:51Z] orchestrator (OVERSEER_ALERT): overseer_restart: overseer [info] + +Overseer container was respawned. Old container 32c5d42d-be4 exited with code 1. New container 0fafc89c-519 is now running. + +````yaml +id: 4258739b-c398-4d +phase: implement +metadata: + exit_code: 1 + old_container_id: 32c5d42d-be41-400e-b87d-8b0ac643014d + new_container_id: 0fafc89c-5198-4e1c-9b9d-7a7050d1eff3 + log_tail: "2026-04-23 05:31:22 [INFO ] egg-agent: Agent session init event_type=system\ + \ event_subtype=init model=sonnet cwd= permission_mode=bypassPermissions max_turns=2000\ + \ timeout=7200 setting_sources=\"['project', 'user']\" disallowed_tools=[] sdk=claude_agent_sdk\ + \ [/opt/egg-runtime/shared/egg_agent/client.py:215]\n2026-04-23 05:31:22 [INFO\ + \ ] egg-agent: Assistant message event_type=assistant event_subtype=text text=\"\ + You've hit your limit \xB7 resets 8am (UTC)\" [/opt/egg-runtime/shared/egg_agent/client.py:266]\n\ + 2026-04-23 05:31:22 [INFO ] egg-agent: Agent completed event_type=system event_subtype=result\ + \ model= session_id=df3bb442-09fd-4259-84ee-5591848e4f75 cost_usd=0\ + \ num_turns=1 duration_ms=464 success=False error=\"You've hit your limit \xB7\ + \ resets 8am (UTC)\" [/opt/egg-runtime/shared/egg_agent/client.py:317]\nan error\ + \ occurred during closing of asynchronous generator \nasyncgen: \nRuntimeError: aclose(): asynchronous generator is already\ + \ running\nYou've hit your limit \xB7 resets 8am (UTC)\nYou've hit your limit\ + \ \xB7 resets 8am (UTC)You've hit your limit \xB7 resets 8am (UTC)" + respawn_attempt: 1 + max_respawns: 3 +```` + +### [2026-04-23T05:38:00Z] coder (CONSENSUS_PROPOSE): Proposal from coder + +Gateway /v1/messages proxy now resilient to upstream Anthropic TCP resets. (A) pre-stream retry: client.send() + first iter_bytes() are wrapped in a bounded 1x retry on httpx.ReadError/RemoteProtocolError — the upstream is closed and a fresh request reissued so downstream SDK never sees the error (covers stale connection-pool entries, very-early resets). (B) mid-stream synthetic error: if a reset arrives after bytes have already flowed downstream, generate() catches it, logs container_id+bytes_seen, and yields a well-formed Anthropic-style 'event: error' SSE frame so the SDK treats it as a clean API error rather than a truncated socket. The synthetic frame is fed through _SSEAccumulator so transcript capture still records the failed turn; finally: upstream.close() and _capture_streaming_response behavior preserved unchanged. All four streaming-reset tests pass (send reset retry, first-chunk reset retry, mid-stream synthetic error frame, retry-exhausted 502 path); full tests/gateway/test_anthropic_proxy.py suite (50 tests) green. Satisfies contract tasks task-1-1 (pre-stream retry), task-1-2 (mid-stream synthetic error), task-1-3 (three new TestStreamingResponse tests). + +````yaml +id: bd93878f-bd61-44 +phase: implement +metadata: + payload: + summary: "Gateway /v1/messages proxy now resilient to upstream Anthropic TCP resets.\ + \ (A) pre-stream retry: client.send() + first iter_bytes() are wrapped in a\ + \ bounded 1x retry on httpx.ReadError/RemoteProtocolError \u2014 the upstream\ + \ is closed and a fresh request reissued so downstream SDK never sees the error\ + \ (covers stale connection-pool entries, very-early resets). (B) mid-stream\ + \ synthetic error: if a reset arrives after bytes have already flowed downstream,\ + \ generate() catches it, logs container_id+bytes_seen, and yields a well-formed\ + \ Anthropic-style 'event: error' SSE frame so the SDK treats it as a clean API\ + \ error rather than a truncated socket. The synthetic frame is fed through _SSEAccumulator\ + \ so transcript capture still records the failed turn; finally: upstream.close()\ + \ and _capture_streaming_response behavior preserved unchanged. All four streaming-reset\ + \ tests pass (send reset retry, first-chunk reset retry, mid-stream synthetic\ + \ error frame, retry-exhausted 502 path); full tests/gateway/test_anthropic_proxy.py\ + \ suite (50 tests) green. Satisfies contract tasks task-1-1 (pre-stream retry),\ + \ task-1-2 (mid-stream synthetic error), task-1-3 (three new TestStreamingResponse\ + \ tests)." + attestation: {} + artifacts: + - gateway/gateway.py + - tests/gateway/test_anthropic_proxy.py + risk_considered: '' + commit_sha: dda1f2ad76ecbc08de27ada991a494fd725297d2 + files_changed: + - gateway/gateway.py + - tests/gateway/test_anthropic_proxy.py + tests_run: + - tests/gateway/test_anthropic_proxy.py::TestStreamingResponse + tasks_satisfied: + - task-1-1 + - task-1-2 + - task-1-3 + version: 1 + commit_sha: dda1f2ad76ecbc08de27ada991a494fd725297d2 +```` + +### [2026-04-23T05:39:08Z] reviewer_contract → coder (CONSENSUS_ACK): ACK from reviewer_contract for coder + + +Contract verification review — cycle 1. All three tasks VERIFIED against their acceptance criteria. + +### [task-1-1] Pre-stream bounded (1x) retry — VERIFIED +Evidence: gateway/gateway.py:5261-5312. +- `_send_and_prime()` (5261-5292) builds a fresh request, calls `client.send(..., stream=True)`, then primes `next(iter_bytes())`. Catches `httpx.ReadError`/`httpx.RemoteProtocolError` during either step, closes the failed upstream via `upstream_resp.close()` (5289), and re-raises. +- Retry loop `for attempt in range(2)` (5297-5312) calls `_send_and_prime()`, breaks on success, and on attempt 0 failure logs a warning with `container_id` and continues; on attempt 1 re-raises to the outer handler which returns 502 (verified by `test_streaming_send_reset_retry_exhausted_returns_502` at tests/gateway/test_anthropic_proxy.py:782). +- Request is *rebuilt* each attempt (build_request is inside _send_and_prime), not reused — satisfies the 'rebuild the request' clause. +- Acceptance clause 'send() ReadError once → retry succeeds, clean 200 SSE' verified by `test_streaming_send_reset_retries_once` (test_anthropic_proxy.py:583): asserts `mock_client.send.call_count == 2`, status 200, body contains message_start+message_stop, no `event: error` frame. +- Acceptance clause 'first iter_bytes() ReadError → gateway re-primes, normal stream' verified by `test_streaming_first_chunk_reset_retries_once` (test_anthropic_proxy.py:632): bad_response.iter_bytes returns a generator that raises on first next() pull; retry produces clean stream; `bad_response.close.assert_called()` confirms the failed upstream is released. + +### [task-1-2] Mid-stream synthetic SSE error frame — VERIFIED +Evidence: gateway/gateway.py:5347-5401. +- `generate()` wraps the iteration (first_chunk yield + `for chunk in primed_iterator`) in try/except catching `httpx.ReadError` and `httpx.RemoteProtocolError` (5357). +- On catch: logs `logger.warning` with `container_id` and `bytes_seen` (5365-5371), builds Anthropic-style payload `{type: error, error: {type: api_error, message: 'upstream connection reset'}}` (5372-5378), emits `event: error\ndata: \n\n` frame (5379-5383), feeds it to the accumulator via `_consume_chunk(error_frame)` (5384), yields it (5385), and returns cleanly (no re-raise). +- The outer `finally:` block (5386-5401) preserving `upstream.close()` and `_capture_streaming_response(...)` is untouched. +- Acceptance 'original chunk then well-formed event: error frame, stream closes without raising, _capture_streaming_response still runs' verified by `test_streaming_midstream_reset_yields_synthetic_error_frame` (test_anthropic_proxy.py:693): asserts `first_chunk in body`, `event: error in body`, `body.index(first_chunk) < body.index(event: error)`, `body.endswith(b'\n\n')`, parses the payload JSON and checks `payload['type'] == 'error'` and `payload['error']['type'] == 'api_error'`, and asserts `mid_reset_response.close.assert_called()` proving the finally branch ran. + +### [task-1-3] Tests in TestStreamingResponse — VERIFIED +Evidence: tests/gateway/test_anthropic_proxy.py:569-830. +- Helper `_iter_then_raise(chunks, exc)` (569-581): yields chunks then raises; empty list raises on first pull (pre-stream reset); N chunks raises on pull N+1 (mid-stream reset). Matches 'small helper to wrap an iterator so it raises after N yielded chunks'. +- (a) `test_streaming_send_reset_retries_once` (583) — send() ReadError once then success. +- (b) `test_streaming_first_chunk_reset_retries_once` (632) — iter_bytes raises on first pull then retry succeeds. +- (c) `test_streaming_midstream_reset_yields_synthetic_error_frame` (693) — RemoteProtocolError after one chunk; body ends with synthetic event: error frame. +- Bonus: `test_streaming_send_reset_retry_exhausted_returns_502` (782) — exhaustion returns 502. +- Ran `pytest tests/gateway/test_anthropic_proxy.py::TestStreamingResponse -v` locally — 6 passed in 0.77s; both pre-existing tests (`test_streaming_request_detected`, `test_streaming_content_type_forwarded`) continue to pass, satisfying the no-regression clause. + +### Non-blocking +- **gateway/gateway.py:5348** — `nonlocal bytes_seen` in `generate()` is unused (generate never rebinds `bytes_seen`; the mutation happens inside `_consume_chunk`, which has its own nonlocal). Harmless but removable. Does not affect contract verification. +- **gateway/gateway.py:5294-5296** — `upstream: Any`, `primed_iterator: Any`, `first_chunk: bytes | None` could be typed as `httpx.Response` / `Iterator[bytes]` for clarity; current `Any` matches the surrounding style so this is optional. + + +````yaml +id: fbc8408d-8134-41 +phase: implement +metadata: + payload: + artifact_references: + - gateway/gateway.py + - tests/gateway/test_anthropic_proxy.py + reason: "\nContract verification review \u2014 cycle 1. All three tasks VERIFIED\ + \ against their acceptance criteria.\n\n### [task-1-1] Pre-stream bounded (1x)\ + \ retry \u2014 VERIFIED\nEvidence: gateway/gateway.py:5261-5312.\n- `_send_and_prime()`\ + \ (5261-5292) builds a fresh request, calls `client.send(..., stream=True)`,\ + \ then primes `next(iter_bytes())`. Catches `httpx.ReadError`/`httpx.RemoteProtocolError`\ + \ during either step, closes the failed upstream via `upstream_resp.close()`\ + \ (5289), and re-raises.\n- Retry loop `for attempt in range(2)` (5297-5312)\ + \ calls `_send_and_prime()`, breaks on success, and on attempt 0 failure logs\ + \ a warning with `container_id` and continues; on attempt 1 re-raises to the\ + \ outer handler which returns 502 (verified by `test_streaming_send_reset_retry_exhausted_returns_502`\ + \ at tests/gateway/test_anthropic_proxy.py:782).\n- Request is *rebuilt* each\ + \ attempt (build_request is inside _send_and_prime), not reused \u2014 satisfies\ + \ the 'rebuild the request' clause.\n- Acceptance clause 'send() ReadError once\ + \ \u2192 retry succeeds, clean 200 SSE' verified by `test_streaming_send_reset_retries_once`\ + \ (test_anthropic_proxy.py:583): asserts `mock_client.send.call_count == 2`,\ + \ status 200, body contains message_start+message_stop, no `event: error` frame.\n\ + - Acceptance clause 'first iter_bytes() ReadError \u2192 gateway re-primes,\ + \ normal stream' verified by `test_streaming_first_chunk_reset_retries_once`\ + \ (test_anthropic_proxy.py:632): bad_response.iter_bytes returns a generator\ + \ that raises on first next() pull; retry produces clean stream; `bad_response.close.assert_called()`\ + \ confirms the failed upstream is released.\n\n### [task-1-2] Mid-stream synthetic\ + \ SSE error frame \u2014 VERIFIED\nEvidence: gateway/gateway.py:5347-5401.\n\ + - `generate()` wraps the iteration (first_chunk yield + `for chunk in primed_iterator`)\ + \ in try/except catching `httpx.ReadError` and `httpx.RemoteProtocolError` (5357).\n\ + - On catch: logs `logger.warning` with `container_id` and `bytes_seen` (5365-5371),\ + \ builds Anthropic-style payload `{type: error, error: {type: api_error, message:\ + \ 'upstream connection reset'}}` (5372-5378), emits `event: error\\ndata: \\\ + n\\n` frame (5379-5383), feeds it to the accumulator via `_consume_chunk(error_frame)`\ + \ (5384), yields it (5385), and returns cleanly (no re-raise).\n- The outer\ + \ `finally:` block (5386-5401) preserving `upstream.close()` and `_capture_streaming_response(...)`\ + \ is untouched.\n- Acceptance 'original chunk then well-formed event: error\ + \ frame, stream closes without raising, _capture_streaming_response still runs'\ + \ verified by `test_streaming_midstream_reset_yields_synthetic_error_frame`\ + \ (test_anthropic_proxy.py:693): asserts `first_chunk in body`, `event: error\ + \ in body`, `body.index(first_chunk) < body.index(event: error)`, `body.endswith(b'\\\ + n\\n')`, parses the payload JSON and checks `payload['type'] == 'error'` and\ + \ `payload['error']['type'] == 'api_error'`, and asserts `mid_reset_response.close.assert_called()`\ + \ proving the finally branch ran.\n\n### [task-1-3] Tests in TestStreamingResponse\ + \ \u2014 VERIFIED\nEvidence: tests/gateway/test_anthropic_proxy.py:569-830.\n\ + - Helper `_iter_then_raise(chunks, exc)` (569-581): yields chunks then raises;\ + \ empty list raises on first pull (pre-stream reset); N chunks raises on pull\ + \ N+1 (mid-stream reset). Matches 'small helper to wrap an iterator so it raises\ + \ after N yielded chunks'.\n- (a) `test_streaming_send_reset_retries_once` (583)\ + \ \u2014 send() ReadError once then success.\n- (b) `test_streaming_first_chunk_reset_retries_once`\ + \ (632) \u2014 iter_bytes raises on first pull then retry succeeds.\n- (c) `test_streaming_midstream_reset_yields_synthetic_error_frame`\ + \ (693) \u2014 RemoteProtocolError after one chunk; body ends with synthetic\ + \ event: error frame.\n- Bonus: `test_streaming_send_reset_retry_exhausted_returns_502`\ + \ (782) \u2014 exhaustion returns 502.\n- Ran `pytest tests/gateway/test_anthropic_proxy.py::TestStreamingResponse\ + \ -v` locally \u2014 6 passed in 0.77s; both pre-existing tests (`test_streaming_request_detected`,\ + \ `test_streaming_content_type_forwarded`) continue to pass, satisfying the\ + \ no-regression clause.\n\n### Non-blocking\n- **gateway/gateway.py:5348** \u2014\ + \ `nonlocal bytes_seen` in `generate()` is unused (generate never rebinds `bytes_seen`;\ + \ the mutation happens inside `_consume_chunk`, which has its own nonlocal).\ + \ Harmless but removable. Does not affect contract verification.\n- **gateway/gateway.py:5294-5296**\ + \ \u2014 `upstream: Any`, `primed_iterator: Any`, `first_chunk: bytes | None`\ + \ could be typed as `httpx.Response` / `Iterator[bytes]` for clarity; current\ + \ `Any` matches the surrounding style so this is optional.\n" + version: 1 +```` + +### [2026-04-23T05:39:22Z] documenter (CONSENSUS_PROPOSE): Proposal from documenter + +Documenter phase complete for #1907. Reviewed the code resilience changes in gateway/gateway.py (pre-stream bounded retry + mid-stream synthetic SSE error-event) and confirmed the existing docs/architecture/credential-injection.md 'Upstream Stream Resilience' section accurately matches the implementation (retry bounded to one attempt, gated on bytes_seen == 0; mid-stream ReadError/RemoteProtocolError catch emits well-formed Anthropic-style event: error frame fed through accumulator; finally upstream.close() preserved; logger.warning with container_id+bytes_seen). Enhanced gateway/README.md to add a cross-reference in the Anthropic Proxy endpoint block and a new Design Decision #11, so readers of the gateway API reference can discover the resilience behavior and jump to the architecture doc. No contract tasks (task-1-1..task-1-3) are owned by documenter; those are coder/tester artifacts. Documentation satisfies the implicit cross-cutting requirement that operator-facing behavior changes are described in the architecture docs. + +````yaml +id: af50e030-c79d-4f +phase: implement +metadata: + payload: + summary: 'Documenter phase complete for #1907. Reviewed the code resilience changes + in gateway/gateway.py (pre-stream bounded retry + mid-stream synthetic SSE error-event) + and confirmed the existing docs/architecture/credential-injection.md ''Upstream + Stream Resilience'' section accurately matches the implementation (retry bounded + to one attempt, gated on bytes_seen == 0; mid-stream ReadError/RemoteProtocolError + catch emits well-formed Anthropic-style event: error frame fed through accumulator; + finally upstream.close() preserved; logger.warning with container_id+bytes_seen). + Enhanced gateway/README.md to add a cross-reference in the Anthropic Proxy endpoint + block and a new Design Decision #11, so readers of the gateway API reference + can discover the resilience behavior and jump to the architecture doc. No contract + tasks (task-1-1..task-1-3) are owned by documenter; those are coder/tester artifacts. + Documentation satisfies the implicit cross-cutting requirement that operator-facing + behavior changes are described in the architecture docs.' + attestation: {} + artifacts: + - docs/architecture/credential-injection.md + - gateway/README.md + risk_considered: '' + commit_sha: 0a4e87643761aa6d24008168aafdf01eae748f44 + files_changed: + - gateway/README.md + tests_run: + - '' + tasks_satisfied: + - '' + version: 1 + commit_sha: 0a4e87643761aa6d24008168aafdf01eae748f44 +```` + +### [2026-04-23T05:40:57Z] reviewer_code → coder (CONSENSUS_ACK): ACK from reviewer_code for coder + + +Reviewed gateway/gateway.py (full diff of proxy_anthropic_messages() streaming branch, lines 5241-5408) plus surrounding helpers (_SSEAccumulator at 5002-5149, _capture_streaming_response at 5151-5196, _filter_response_headers, get_anthropic_client at 4767-4780, and the outer except handlers at 5433-5464). Verified httpx exception inheritance (ReadError and RemoteProtocolError both descend from TransportError→RequestError→HTTPError→Exception) so retry-exhausted cases reach the catch-all Exception handler and surface as 502. Traced data flow end-to-end: + +### Correctness (verified) +1. **Pre-stream prime pattern is sound.** _send_and_prime() calls client.send(..., stream=True) then iter_bytes() then next(iterator) to pull the first chunk eagerly. This is what gates the 'no downstream byte has flowed' invariant — the retry is only safe because Response() is not constructed until after the prime succeeds. If send() raises, upstream_resp is never bound (correct — nothing to close). If iter_bytes()/next() raises ReadError/RemoteProtocolError, the inner except closes upstream_resp before re-raising, preventing a half-open conn leaking back into the httpx keepalive pool. +2. **Bounded retry is correctly bounded.** for attempt in range(2) with a break on success and raise on attempt==1 exhaustion. No risk of infinite loop. Retry-exhausted ReadError/RemoteProtocolError bubble to the except Exception branch → jsonify({'error': {'type': 'api_error', ...}}), 502 — matches the existing error contract. +3. **StopIteration is legally caught.** _send_and_prime() is a regular function, not a generator, so PEP 479 does not apply. An empty upstream body (first=None) correctly no-ops the first-chunk yield in generate() and the for-loop over primed_iterator terminates immediately. +4. **Iterator handoff is single-owned.** iter_bytes() is called exactly once per upstream response (inside _send_and_prime); next() pulls one chunk; the same iterator object is returned and reused in generate()'s for-loop. No double-iter_bytes() call that would create a second generator on the same already-consumed stream. +5. **Mid-stream synthetic frame is well-formed.** event: error\ndata: {JSON}\n\n shape matches Anthropic's documented error event and is parsed by _SSEAccumulator._process_event at gateway.py:5114 (produces _error_blocks + stop_reason='error'), so the captured transcript correctly reflects the failed generation. Frame is fed through _consume_chunk before being yielded so the accumulator sees it. +6. **finally: upstream.close() + _capture_streaming_response preserved.** Runs on success, on mid-stream ReadError, and on mid-stream RemoteProtocolError. Transcript capture still happens on failure — operators retain visibility into the partial turn. +7. **Request rebuild on retry is safe.** headers is a resolved dict; request_body is bytes from request.get_data() (Flask caches it). build_request is called fresh inside _send_and_prime on every attempt, so no consumed-stream issue. +8. **Retry scope is correct.** Only ReadError + RemoteProtocolError trigger the retry. ConnectError (502) and TimeoutException (504) still get their existing dedicated handlers — no behavior change for non-reset errors. + +### Security +- No new attack surface: synthetic error frame payload is a fixed literal ('upstream connection reset'); no attacker-influenced string is interpolated into the SSE frame. +- Credential injection path unchanged; headers dict is built once upstream of the retry loop. +- No log injection: container_id comes from session, error string comes from httpx exception, both pass through logger.warning's structured kwargs (not format string injection). + +### Non-blocking observations +- **gateway.py:5348** 'nonlocal bytes_seen' inside generate() is technically redundant — generate() only reads bytes_seen (in the warning log's kwargs), never assigns. Harmless, and removing it is a style change only. +- **gateway.py:5285-5292** The inner try/except in _send_and_prime() only closes upstream_resp on httpx.ReadError/RemoteProtocolError. A non-transport exception at that point (e.g., an AttributeError from a pathological response mock) would leak the streaming connection. In practice this is unreachable for real httpx, but a broader 'except BaseException:' with try/close could be slightly more defensive. Not worth blocking. +- **gateway.py:5357-5385** The synthetic error frame is counted against MAX_CAPTURE_SIZE via _consume_chunk. If the accumulator is already capture_truncated=True, the synthetic frame is still yielded downstream (correct) but won't appear in the captured transcript — the transcript will lose the error signal. For a 10MB-truncated capture this is a rare corner, but it means big-response-then-reset turns will not show as error=true in stop_reason. Document or special-case as future work; not blocking. +- **gateway.py:5381** json.dumps() is called on every mid-stream reset; tiny allocation but could be hoisted to a module-level pre-encoded constant if this path ever becomes hot. Micro-optimization, skip. + + +````yaml +id: c4cd2735-7051-4c +phase: implement +metadata: + payload: + artifact_references: + - gateway/gateway.py + - dc5058ad5 + reason: "\nReviewed gateway/gateway.py (full diff of proxy_anthropic_messages()\ + \ streaming branch, lines 5241-5408) plus surrounding helpers (_SSEAccumulator\ + \ at 5002-5149, _capture_streaming_response at 5151-5196, _filter_response_headers,\ + \ get_anthropic_client at 4767-4780, and the outer except handlers at 5433-5464).\ + \ Verified httpx exception inheritance (ReadError and RemoteProtocolError both\ + \ descend from TransportError\u2192RequestError\u2192HTTPError\u2192Exception)\ + \ so retry-exhausted cases reach the catch-all Exception handler and surface\ + \ as 502. Traced data flow end-to-end:\n\n### Correctness (verified)\n1. **Pre-stream\ + \ prime pattern is sound.** _send_and_prime() calls client.send(..., stream=True)\ + \ then iter_bytes() then next(iterator) to pull the first chunk eagerly. This\ + \ is what gates the 'no downstream byte has flowed' invariant \u2014 the retry\ + \ is only safe because Response() is not constructed until after the prime succeeds.\ + \ If send() raises, upstream_resp is never bound (correct \u2014 nothing to\ + \ close). If iter_bytes()/next() raises ReadError/RemoteProtocolError, the inner\ + \ except closes upstream_resp before re-raising, preventing a half-open conn\ + \ leaking back into the httpx keepalive pool.\n2. **Bounded retry is correctly\ + \ bounded.** for attempt in range(2) with a break on success and raise on attempt==1\ + \ exhaustion. No risk of infinite loop. Retry-exhausted ReadError/RemoteProtocolError\ + \ bubble to the except Exception branch \u2192 jsonify({'error': {'type': 'api_error',\ + \ ...}}), 502 \u2014 matches the existing error contract.\n3. **StopIteration\ + \ is legally caught.** _send_and_prime() is a regular function, not a generator,\ + \ so PEP 479 does not apply. An empty upstream body (first=None) correctly no-ops\ + \ the first-chunk yield in generate() and the for-loop over primed_iterator\ + \ terminates immediately.\n4. **Iterator handoff is single-owned.** iter_bytes()\ + \ is called exactly once per upstream response (inside _send_and_prime); next()\ + \ pulls one chunk; the same iterator object is returned and reused in generate()'s\ + \ for-loop. No double-iter_bytes() call that would create a second generator\ + \ on the same already-consumed stream.\n5. **Mid-stream synthetic frame is well-formed.**\ + \ event: error\\ndata: {JSON}\\n\\n shape matches Anthropic's documented error\ + \ event and is parsed by _SSEAccumulator._process_event at gateway.py:5114 (produces\ + \ _error_blocks + stop_reason='error'), so the captured transcript correctly\ + \ reflects the failed generation. Frame is fed through _consume_chunk before\ + \ being yielded so the accumulator sees it.\n6. **finally: upstream.close()\ + \ + _capture_streaming_response preserved.** Runs on success, on mid-stream\ + \ ReadError, and on mid-stream RemoteProtocolError. Transcript capture still\ + \ happens on failure \u2014 operators retain visibility into the partial turn.\n\ + 7. **Request rebuild on retry is safe.** headers is a resolved dict; request_body\ + \ is bytes from request.get_data() (Flask caches it). build_request is called\ + \ fresh inside _send_and_prime on every attempt, so no consumed-stream issue.\n\ + 8. **Retry scope is correct.** Only ReadError + RemoteProtocolError trigger\ + \ the retry. ConnectError (502) and TimeoutException (504) still get their existing\ + \ dedicated handlers \u2014 no behavior change for non-reset errors.\n\n###\ + \ Security\n- No new attack surface: synthetic error frame payload is a fixed\ + \ literal ('upstream connection reset'); no attacker-influenced string is interpolated\ + \ into the SSE frame.\n- Credential injection path unchanged; headers dict is\ + \ built once upstream of the retry loop.\n- No log injection: container_id comes\ + \ from session, error string comes from httpx exception, both pass through logger.warning's\ + \ structured kwargs (not format string injection).\n\n### Non-blocking observations\n\ + - **gateway.py:5348** 'nonlocal bytes_seen' inside generate() is technically\ + \ redundant \u2014 generate() only reads bytes_seen (in the warning log's kwargs),\ + \ never assigns. Harmless, and removing it is a style change only.\n- **gateway.py:5285-5292**\ + \ The inner try/except in _send_and_prime() only closes upstream_resp on httpx.ReadError/RemoteProtocolError.\ + \ A non-transport exception at that point (e.g., an AttributeError from a pathological\ + \ response mock) would leak the streaming connection. In practice this is unreachable\ + \ for real httpx, but a broader 'except BaseException:' with try/close could\ + \ be slightly more defensive. Not worth blocking.\n- **gateway.py:5357-5385**\ + \ The synthetic error frame is counted against MAX_CAPTURE_SIZE via _consume_chunk.\ + \ If the accumulator is already capture_truncated=True, the synthetic frame\ + \ is still yielded downstream (correct) but won't appear in the captured transcript\ + \ \u2014 the transcript will lose the error signal. For a 10MB-truncated capture\ + \ this is a rare corner, but it means big-response-then-reset turns will not\ + \ show as error=true in stop_reason. Document or special-case as future work;\ + \ not blocking.\n- **gateway.py:5381** json.dumps() is called on every mid-stream\ + \ reset; tiny allocation but could be hoisted to a module-level pre-encoded\ + \ constant if this path ever becomes hot. Micro-optimization, skip.\n" + version: 1 +```` + +### [2026-04-23T05:41:15Z] reviewer_code → documenter (CONSENSUS_ACK): ACK from reviewer_code for documenter + + +Reviewed the full credential-injection.md diff (18 added lines, 56-76) against the implementation in gateway/gateway.py:5241-5408. Verified the docs accurately describe both resilience paths and their boundaries. + +### Accuracy (verified) +- The pre-stream vs mid-stream table correctly characterizes what each path does, including the key subtlety that the retry is gated on 'no downstream byte has flowed' (implemented via the first-chunk prime in _send_and_prime, not via a bytes_seen == 0 runtime check — docs say 'gated on bytes_seen == 0' which is conceptually right but the implementation enforces it structurally by returning from _send_and_prime before Response() is built. Close enough — no correction needed). +- The 'why not full resumption' explanation correctly identifies the two real concerns: no Anthropic resume tokens, and double-charging / divergent-generation interleaving. +- The 'bounded retry — capped at one attempt' matches for attempt in range(2) with a single continue at attempt==0. +- The 'falls through to the pre-existing except httpx.ConnectError / TimeoutException / Exception handlers' matches gateway.py:5433-5464 exactly. +- The distinction from #1883 (gateway pod restart) and #1873 (consensus-wrapper turn-1 retry) is correct — those handle gateway-process-gone and single-agent-startup respectively; #1907 handles gateway-healthy/upstream-unhealthy, which is a disjoint concern. +- The aclose() cleanup-bug reference correctly identifies why a clean synthetic SSE frame is preferable to a raw socket truncation — the downstream SDK's async generator cleanup races on a truncated read, producing the 'aclose(): asynchronous generator is already running' RuntimeError pattern we saw in overseer log_tail. + +### Structure / readability +- Markdown table format is consistent with the existing doc style (rendered endpoint table directly above). +- Cross-links to #1907, #1883, #1873 are correctly formatted. +- Appropriately scoped — lives under 'Gateway Proxy Endpoints' where a streaming-resilience note naturally belongs, not shoehorned into a section about credentials. + +### Non-blocking observations +- **credential-injection.md:74** Minor: 'gated on bytes_seen == 0' is a slight conceptual simplification — the actual gate is 'the first-chunk prime has not yet returned successfully.' bytes_seen only tracks what's been yielded once generate() runs. Either phrasing works; no change needed. +- The doc could mention that the synthetic error frame's message is a fixed literal ('upstream connection reset') — useful for operators grepping transcripts for this failure mode. Non-blocking, nice-to-have. + + +````yaml +id: 4acb30fc-83d0-4e +phase: implement +metadata: + payload: + artifact_references: + - docs/architecture/credential-injection.md + - db72789ee + reason: "\nReviewed the full credential-injection.md diff (18 added lines, 56-76)\ + \ against the implementation in gateway/gateway.py:5241-5408. Verified the docs\ + \ accurately describe both resilience paths and their boundaries.\n\n### Accuracy\ + \ (verified)\n- The pre-stream vs mid-stream table correctly characterizes what\ + \ each path does, including the key subtlety that the retry is gated on 'no\ + \ downstream byte has flowed' (implemented via the first-chunk prime in _send_and_prime,\ + \ not via a bytes_seen == 0 runtime check \u2014 docs say 'gated on bytes_seen\ + \ == 0' which is conceptually right but the implementation enforces it structurally\ + \ by returning from _send_and_prime before Response() is built. Close enough\ + \ \u2014 no correction needed).\n- The 'why not full resumption' explanation\ + \ correctly identifies the two real concerns: no Anthropic resume tokens, and\ + \ double-charging / divergent-generation interleaving.\n- The 'bounded retry\ + \ \u2014 capped at one attempt' matches for attempt in range(2) with a single\ + \ continue at attempt==0.\n- The 'falls through to the pre-existing except httpx.ConnectError\ + \ / TimeoutException / Exception handlers' matches gateway.py:5433-5464 exactly.\n\ + - The distinction from #1883 (gateway pod restart) and #1873 (consensus-wrapper\ + \ turn-1 retry) is correct \u2014 those handle gateway-process-gone and single-agent-startup\ + \ respectively; #1907 handles gateway-healthy/upstream-unhealthy, which is a\ + \ disjoint concern.\n- The aclose() cleanup-bug reference correctly identifies\ + \ why a clean synthetic SSE frame is preferable to a raw socket truncation \u2014\ + \ the downstream SDK's async generator cleanup races on a truncated read, producing\ + \ the 'aclose(): asynchronous generator is already running' RuntimeError pattern\ + \ we saw in overseer log_tail.\n\n### Structure / readability\n- Markdown table\ + \ format is consistent with the existing doc style (rendered endpoint table\ + \ directly above).\n- Cross-links to #1907, #1883, #1873 are correctly formatted.\n\ + - Appropriately scoped \u2014 lives under 'Gateway Proxy Endpoints' where a\ + \ streaming-resilience note naturally belongs, not shoehorned into a section\ + \ about credentials.\n\n### Non-blocking observations\n- **credential-injection.md:74**\ + \ Minor: 'gated on bytes_seen == 0' is a slight conceptual simplification \u2014\ + \ the actual gate is 'the first-chunk prime has not yet returned successfully.'\ + \ bytes_seen only tracks what's been yielded once generate() runs. Either phrasing\ + \ works; no change needed.\n- The doc could mention that the synthetic error\ + \ frame's message is a fixed literal ('upstream connection reset') \u2014 useful\ + \ for operators grepping transcripts for this failure mode. Non-blocking, nice-to-have.\n" + version: 1 +```` + +### [2026-04-23T05:41:15Z] orchestrator → documenter (STATUS): All reviewers have ACKed — ready to confirm + +All assigned reviewers have ACKed your proposal (version 1). Run `egg-orch consensus confirmed` to confirm. + +````yaml +id: 5c8544d6-3be4-4c +phase: implement +metadata: + fully_acked: true + version: 1 +```` + +### [2026-04-23T05:41:47Z] documenter (CONSENSUS_CONFIRMED): Confirmed by documenter (pending_acks) + +Agent documenter cannot confirm: producers ['tester'] have never proposed (proposal_version == 0). All producers must propose before any agent can confirm consensus. + +````yaml +id: 6086974b-301d-4b +phase: implement +metadata: + pending_acks: true +```` + +### [2026-04-23T05:42:41Z] reviewer_code → coder (CONSENSUS_ACK): ACK from reviewer_code for coder + + +Re-reviewing coder's re-proposal at commit dda1f2ad7 (now covers the full implement payload: gateway.py resilience code + tests that tester landed). Same substantive review as my prior ACK — all concerns verified against the final HEAD. + +### Correctness (verified against gateway/gateway.py:5241-5408) +1. **Pre-stream prime pattern.** _send_and_prime() calls client.send(..., stream=True), then iter_bytes(), then next(iterator) eagerly. The first-chunk fetch is what gates the 'no byte yielded' invariant — Response() is constructed only after prime succeeds, so retry is structurally safe. If send() raises ReadError/RemoteProtocolError, upstream_resp is never bound (correct — nothing to close, the connection never committed). If iter_bytes() or next() raises, the inner except closes upstream_resp before re-raising, preventing a half-open conn leaking back into httpx's keepalive pool. +2. **Bounded retry.** for attempt in range(2), break on success, raise on attempt==1 exhaustion. No infinite-loop risk. Exhausted ReadError/RemoteProtocolError propagate to except Exception → 502 (httpx.ReadError and RemoteProtocolError are both subclasses of httpx.HTTPError and Exception — verified via the class __mro__). +3. **StopIteration.** _send_and_prime is a regular function (not a generator), so PEP 479 doesn't apply — catching StopIteration from next(iterator) is legal. Empty body (first=None) correctly no-ops the first-chunk yield. +4. **Iterator ownership.** iter_bytes() is called exactly once per upstream response, and the same iterator object is returned and reused in generate()'s for-loop. No second-call-to-iter_bytes that would reset the read-position or raise. +5. **Synthetic SSE frame.** event: error\ndata: {JSON}\n\n matches Anthropic's documented shape and is parsed by _SSEAccumulator._process_event at gateway.py:5114 → produces _error_blocks + stop_reason='error' in the captured transcript. Fed through _consume_chunk before yield so the accumulator sees it. +6. **finally: upstream.close() + _capture_streaming_response preserved** on all paths: success, mid-stream ReadError, mid-stream RemoteProtocolError. Operators retain transcript visibility into partial turns. +7. **Retry is idempotent.** headers is a resolved dict; request_body is bytes (Flask caches via get_data()); build_request is fresh per attempt. No consumed-stream risk across retries. +8. **Exception scope.** Only ReadError + RemoteProtocolError trigger retry. ConnectError → 502 and TimeoutException → 504 keep their existing handlers unchanged. + +### Tests (verified against tests/gateway/test_anthropic_proxy.py:542-813) +Four new tests in TestStreamingResponse: +- test_streaming_send_reset_retries_once — covers task-1-1 clause (a): send() raises, retry succeeds. Asserts send called twice, 200 status, no synthetic error frame, good_response.close() invoked. +- test_streaming_first_chunk_reset_retries_once — covers task-1-1 clause (b): first iter_bytes() pull raises, retry succeeds. Asserts bad_response.close() called (no pool leak) before good_response.close(). +- test_streaming_midstream_reset_yields_synthetic_error_frame — covers task-1-2: RemoteProtocolError after first chunk → downstream body = original chunk + synthetic event: error frame. Asserts no retry, body.endswith(b'\n\n'), first_chunk precedes error frame, and parses the synthetic JSON to verify shape (type='error', error.type='api_error', message present). +- test_streaming_send_reset_retry_exhausted_returns_502 — extra defense: both attempts raise, downstream gets 502, mock_client.send.call_count == 2 (bounded). + +Helper _iter_then_raise(chunks, exc) matches task-1-3's 'helper to wrap an iterator so it raises after N yielded chunks' requirement. + +Tester reports and in commit dda1f2ad7's message. + +### Security +- Synthetic error frame payload is a fixed literal ('upstream connection reset') — no attacker-controlled interpolation into SSE wire. +- Credential injection path unchanged; headers dict built once upstream of retry loop. +- No log injection: container_id and error come through structured logger.warning kwargs. + +### Non-blocking observations +- **gateway.py:5348** 'nonlocal bytes_seen' is redundant in generate() — only read, never assigned. Harmless. +- **gateway.py:5285-5292** Inner except in _send_and_prime only closes upstream_resp on ReadError/RemoteProtocolError. Non-transport exceptions (e.g., AttributeError) would leak; unreachable in practice with real httpx, but a broader except + try-close is slightly more defensive. Not blocking. +- **gateway.py:5357-5385** Synthetic error frame is counted against MAX_CAPTURE_SIZE via _consume_chunk. If the accumulator is already capture_truncated=True (>10MB response), the synthetic frame still yields downstream correctly but won't appear in the transcript — so big-response-then-reset turns lose the error signal in stop_reason. Rare corner; non-blocking. +- **gateway.py:5381** json.dumps on every mid-stream reset is a micro-allocation; could be hoisted to a module-level pre-encoded constant. Skip. + + +````yaml +id: 693bd80a-e281-4a +phase: implement +metadata: + payload: + artifact_references: + - gateway/gateway.py + - tests/gateway/test_anthropic_proxy.py + - dda1f2ad7 + reason: "\nRe-reviewing coder's re-proposal at commit dda1f2ad7 (now covers the\ + \ full implement payload: gateway.py resilience code + tests that tester landed).\ + \ Same substantive review as my prior ACK \u2014 all concerns verified against\ + \ the final HEAD.\n\n### Correctness (verified against gateway/gateway.py:5241-5408)\n\ + 1. **Pre-stream prime pattern.** _send_and_prime() calls client.send(..., stream=True),\ + \ then iter_bytes(), then next(iterator) eagerly. The first-chunk fetch is what\ + \ gates the 'no byte yielded' invariant \u2014 Response() is constructed only\ + \ after prime succeeds, so retry is structurally safe. If send() raises ReadError/RemoteProtocolError,\ + \ upstream_resp is never bound (correct \u2014 nothing to close, the connection\ + \ never committed). If iter_bytes() or next() raises, the inner except closes\ + \ upstream_resp before re-raising, preventing a half-open conn leaking back\ + \ into httpx's keepalive pool.\n2. **Bounded retry.** for attempt in range(2),\ + \ break on success, raise on attempt==1 exhaustion. No infinite-loop risk. Exhausted\ + \ ReadError/RemoteProtocolError propagate to except Exception \u2192 502 (httpx.ReadError\ + \ and RemoteProtocolError are both subclasses of httpx.HTTPError and Exception\ + \ \u2014 verified via the class __mro__).\n3. **StopIteration.** _send_and_prime\ + \ is a regular function (not a generator), so PEP 479 doesn't apply \u2014 catching\ + \ StopIteration from next(iterator) is legal. Empty body (first=None) correctly\ + \ no-ops the first-chunk yield.\n4. **Iterator ownership.** iter_bytes() is\ + \ called exactly once per upstream response, and the same iterator object is\ + \ returned and reused in generate()'s for-loop. No second-call-to-iter_bytes\ + \ that would reset the read-position or raise.\n5. **Synthetic SSE frame.**\ + \ event: error\\ndata: {JSON}\\n\\n matches Anthropic's documented shape and\ + \ is parsed by _SSEAccumulator._process_event at gateway.py:5114 \u2192 produces\ + \ _error_blocks + stop_reason='error' in the captured transcript. Fed through\ + \ _consume_chunk before yield so the accumulator sees it.\n6. **finally: upstream.close()\ + \ + _capture_streaming_response preserved** on all paths: success, mid-stream\ + \ ReadError, mid-stream RemoteProtocolError. Operators retain transcript visibility\ + \ into partial turns.\n7. **Retry is idempotent.** headers is a resolved dict;\ + \ request_body is bytes (Flask caches via get_data()); build_request is fresh\ + \ per attempt. No consumed-stream risk across retries.\n8. **Exception scope.**\ + \ Only ReadError + RemoteProtocolError trigger retry. ConnectError \u2192 502\ + \ and TimeoutException \u2192 504 keep their existing handlers unchanged.\n\n\ + ### Tests (verified against tests/gateway/test_anthropic_proxy.py:542-813)\n\ + Four new tests in TestStreamingResponse:\n- test_streaming_send_reset_retries_once\ + \ \u2014 covers task-1-1 clause (a): send() raises, retry succeeds. Asserts\ + \ send called twice, 200 status, no synthetic error frame, good_response.close()\ + \ invoked.\n- test_streaming_first_chunk_reset_retries_once \u2014 covers task-1-1\ + \ clause (b): first iter_bytes() pull raises, retry succeeds. Asserts bad_response.close()\ + \ called (no pool leak) before good_response.close().\n- test_streaming_midstream_reset_yields_synthetic_error_frame\ + \ \u2014 covers task-1-2: RemoteProtocolError after first chunk \u2192 downstream\ + \ body = original chunk + synthetic event: error frame. Asserts no retry, body.endswith(b'\\\ + n\\n'), first_chunk precedes error frame, and parses the synthetic JSON to verify\ + \ shape (type='error', error.type='api_error', message present).\n- test_streaming_send_reset_retry_exhausted_returns_502\ + \ \u2014 extra defense: both attempts raise, downstream gets 502, mock_client.send.call_count\ + \ == 2 (bounded).\n\nHelper _iter_then_raise(chunks, exc) matches task-1-3's\ + \ 'helper to wrap an iterator so it raises after N yielded chunks' requirement.\n\ + \nTester reports and in commit dda1f2ad7's message.\n\n### Security\n- Synthetic\ + \ error frame payload is a fixed literal ('upstream connection reset') \u2014\ + \ no attacker-controlled interpolation into SSE wire.\n- Credential injection\ + \ path unchanged; headers dict built once upstream of retry loop.\n- No log\ + \ injection: container_id and error come through structured logger.warning kwargs.\n\ + \n### Non-blocking observations\n- **gateway.py:5348** 'nonlocal bytes_seen'\ + \ is redundant in generate() \u2014 only read, never assigned. Harmless.\n-\ + \ **gateway.py:5285-5292** Inner except in _send_and_prime only closes upstream_resp\ + \ on ReadError/RemoteProtocolError. Non-transport exceptions (e.g., AttributeError)\ + \ would leak; unreachable in practice with real httpx, but a broader except\ + \ + try-close is slightly more defensive. Not blocking.\n- **gateway.py:5357-5385**\ + \ Synthetic error frame is counted against MAX_CAPTURE_SIZE via _consume_chunk.\ + \ If the accumulator is already capture_truncated=True (>10MB response), the\ + \ synthetic frame still yields downstream correctly but won't appear in the\ + \ transcript \u2014 so big-response-then-reset turns lose the error signal in\ + \ stop_reason. Rare corner; non-blocking.\n- **gateway.py:5381** json.dumps\ + \ on every mid-stream reset is a micro-allocation; could be hoisted to a module-level\ + \ pre-encoded constant. Skip.\n" + version: 1 +```` + +### [2026-04-23T05:43:00Z] reviewer_code → documenter (CONSENSUS_ACK): ACK from reviewer_code for documenter + + +Re-reviewing documenter's re-proposal at 0a4e87643, which adds gateway/README.md breadcrumb to the previously-reviewed credential-injection.md content. + +### credential-injection.md (re-verified) +Matches implementation at gateway/gateway.py:5241-5408: +- Pre-stream vs mid-stream table accurately describes behavior. +- 'Why not full resumption' rationale is correct (no Anthropic resume tokens, double-charging, divergent generation interleaving). +- 'Bounded retry' matches for attempt in range(2) with single continue. +- Fall-through to ConnectError/TimeoutException/Exception handlers matches gateway.py:5433-5464. +- Relationship to #1883 and #1873 is correctly distinguished. +- The aclose() cleanup-bug reference correctly identifies the downstream SDK failure mode that a clean synthetic SSE frame avoids. + +### gateway/README.md delta (0a4e87643) +New content: +- Line 421-430: /v1/messages endpoint description expanded with a 3-sentence summary of the resilience guarantees + cross-link to credential-injection.md. Content accurately matches implementation (pre-stream bounded single retry, mid-stream synthetic SSE error frame). +- Line 565: Design decision #11 added in the same style as decisions 1-10. Correctly states: bounded to one attempt, gated on bytes_seen == 0 conceptually, mid-stream fallback because no resume tokens, risk of double-charging/interleaved generations. Correctly distinguishes from #1883 (pod restart) and #1873 (turn-1 consensus-wrapper retry). + +### Discoverability +Good layering: operator-facing API reference (gateway/README.md) gets a short breadcrumb; design rationale (docs/architecture/credential-injection.md) holds the full table and prose. No duplication — the README content is a 3-line summary pointing to the detail doc. + +### Non-blocking observations +- **credential-injection.md:74 / gateway/README.md design-decision #11** 'gated on bytes_seen == 0' is a slight conceptual simplification — the actual gate is 'the first-chunk prime returned successfully'. bytes_seen only tracks yields once generate() runs. Either phrasing is correct for operators. +- Design decision #11 could mention the synthetic error message is the fixed literal 'upstream connection reset' (helps operators grep transcripts for this failure mode). Non-blocking nice-to-have. + + +````yaml +id: 3b886e85-f331-4f +phase: implement +metadata: + payload: + artifact_references: + - docs/architecture/credential-injection.md + - gateway/README.md + - 0a4e87643 + reason: "\nRe-reviewing documenter's re-proposal at 0a4e87643, which adds gateway/README.md\ + \ breadcrumb to the previously-reviewed credential-injection.md content.\n\n\ + ### credential-injection.md (re-verified)\nMatches implementation at gateway/gateway.py:5241-5408:\n\ + - Pre-stream vs mid-stream table accurately describes behavior.\n- 'Why not\ + \ full resumption' rationale is correct (no Anthropic resume tokens, double-charging,\ + \ divergent generation interleaving).\n- 'Bounded retry' matches for attempt\ + \ in range(2) with single continue.\n- Fall-through to ConnectError/TimeoutException/Exception\ + \ handlers matches gateway.py:5433-5464.\n- Relationship to #1883 and #1873\ + \ is correctly distinguished.\n- The aclose() cleanup-bug reference correctly\ + \ identifies the downstream SDK failure mode that a clean synthetic SSE frame\ + \ avoids.\n\n### gateway/README.md delta (0a4e87643)\nNew content:\n- Line 421-430:\ + \ /v1/messages endpoint description expanded with a 3-sentence summary of the\ + \ resilience guarantees + cross-link to credential-injection.md. Content accurately\ + \ matches implementation (pre-stream bounded single retry, mid-stream synthetic\ + \ SSE error frame).\n- Line 565: Design decision #11 added in the same style\ + \ as decisions 1-10. Correctly states: bounded to one attempt, gated on bytes_seen\ + \ == 0 conceptually, mid-stream fallback because no resume tokens, risk of double-charging/interleaved\ + \ generations. Correctly distinguishes from #1883 (pod restart) and #1873 (turn-1\ + \ consensus-wrapper retry).\n\n### Discoverability\nGood layering: operator-facing\ + \ API reference (gateway/README.md) gets a short breadcrumb; design rationale\ + \ (docs/architecture/credential-injection.md) holds the full table and prose.\ + \ No duplication \u2014 the README content is a 3-line summary pointing to the\ + \ detail doc.\n\n### Non-blocking observations\n- **credential-injection.md:74\ + \ / gateway/README.md design-decision #11** 'gated on bytes_seen == 0' is a\ + \ slight conceptual simplification \u2014 the actual gate is 'the first-chunk\ + \ prime returned successfully'. bytes_seen only tracks yields once generate()\ + \ runs. Either phrasing is correct for operators.\n- Design decision #11 could\ + \ mention the synthetic error message is the fixed literal 'upstream connection\ + \ reset' (helps operators grep transcripts for this failure mode). Non-blocking\ + \ nice-to-have.\n" + version: 1 +```` + +### [2026-04-23T05:43:00Z] orchestrator → documenter (STATUS): All reviewers have ACKed — ready to confirm + +All assigned reviewers have ACKed your proposal (version 1). Run `egg-orch consensus confirmed` to confirm. + +````yaml +id: 3b395420-caae-49 +phase: implement +metadata: + fully_acked: true + version: 1 +```` + +### [2026-04-23T05:50:23Z] tester (CONSENSUS_PROPOSE): Proposal from tester + +Validated coder's gateway stream-reset resilience fix for #1907 and extended TestStreamingResponse with 4 new tests in tests/gateway/test_anthropic_proxy.py (commit dda1f2a). All three contract acceptance cases are covered: (a) test_streaming_send_reset_retries_once — client.send() raises httpx.ReadError once, bounded 1x retry produces clean 200 SSE; (b) test_streaming_first_chunk_reset_retries_once — first iter_bytes() pull raises ReadError, gateway closes bad upstream and re-primes; (c) test_streaming_midstream_reset_yields_synthetic_error_frame — RemoteProtocolError after one chunk yields well-formed Anthropic-style 'event: error' SSE frame after the original chunk, JSON-parses the synthetic payload to detect malformed output, verifies upstream.close() runs, and confirms no retry is attempted mid-stream. Plus one defense-in-depth test (test_streaming_send_reset_retry_exhausted_returns_502) that confirms the retry is bounded to 1x and falls through to 502. Tests use the contract-mandated _iter_then_raise helper that wraps an iterator so it raises after N yielded chunks. Checks passed: ruff check (clean), ruff format --check (686 files already formatted), mypy (Success: no issues found in 186 source files), pytest tests/gateway/ (129 passed). Wider test-suite failures in orchestrator/tests/test_kubernetes_client.py and orchestrator/tests/test_gateway_client.py are pre-existing sandbox env issues (module 'kubernetes.client' missing V1SecurityContext/AppsV1Api) unrelated to this PR. Satisfies task-1-3; task-1-1 and task-1-2 validated as correctly implemented by coder in gateway/gateway.py (commit dc5058a). No gaps found — coder's implementation matches contract spec. + +````yaml +id: c5a1595e-686a-47 +phase: implement +metadata: + payload: + summary: "Validated coder's gateway stream-reset resilience fix for #1907 and\ + \ extended TestStreamingResponse with 4 new tests in tests/gateway/test_anthropic_proxy.py\ + \ (commit dda1f2a). All three contract acceptance cases are covered: (a) test_streaming_send_reset_retries_once\ + \ \u2014 client.send() raises httpx.ReadError once, bounded 1x retry produces\ + \ clean 200 SSE; (b) test_streaming_first_chunk_reset_retries_once \u2014 first\ + \ iter_bytes() pull raises ReadError, gateway closes bad upstream and re-primes;\ + \ (c) test_streaming_midstream_reset_yields_synthetic_error_frame \u2014 RemoteProtocolError\ + \ after one chunk yields well-formed Anthropic-style 'event: error' SSE frame\ + \ after the original chunk, JSON-parses the synthetic payload to detect malformed\ + \ output, verifies upstream.close() runs, and confirms no retry is attempted\ + \ mid-stream. Plus one defense-in-depth test (test_streaming_send_reset_retry_exhausted_returns_502)\ + \ that confirms the retry is bounded to 1x and falls through to 502. Tests use\ + \ the contract-mandated _iter_then_raise helper that wraps an iterator so it\ + \ raises after N yielded chunks. Checks passed: ruff check (clean), ruff format\ + \ --check (686 files already formatted), mypy (Success: no issues found in 186\ + \ source files), pytest tests/gateway/ (129 passed). Wider test-suite failures\ + \ in orchestrator/tests/test_kubernetes_client.py and orchestrator/tests/test_gateway_client.py\ + \ are pre-existing sandbox env issues (module 'kubernetes.client' missing V1SecurityContext/AppsV1Api)\ + \ unrelated to this PR. Satisfies task-1-3; task-1-1 and task-1-2 validated\ + \ as correctly implemented by coder in gateway/gateway.py (commit dc5058a).\ + \ No gaps found \u2014 coder's implementation matches contract spec." + artifacts: + - tests/gateway/test_anthropic_proxy.py + files_changed: + - tests/gateway/test_anthropic_proxy.py + tests_run: + - tests/gateway/test_anthropic_proxy.py::TestStreamingResponse::test_streaming_send_reset_retries_once + - tests/gateway/test_anthropic_proxy.py::TestStreamingResponse::test_streaming_first_chunk_reset_retries_once + - tests/gateway/test_anthropic_proxy.py::TestStreamingResponse::test_streaming_midstream_reset_yields_synthetic_error_frame + - tests/gateway/test_anthropic_proxy.py::TestStreamingResponse::test_streaming_send_reset_retry_exhausted_returns_502 + tasks: + - task-1-3 + checks_passed: + - lint + - test + tests_execution_blocked: false + commit_sha: dda1f2ad76ecbc08de27ada991a494fd725297d2 + version: 1 + commit_sha: dda1f2ad76ecbc08de27ada991a494fd725297d2 +```` + +### [2026-04-23T05:50:33Z] reviewer_contract (CONSENSUS_CONFIRMED): Confirmed by reviewer_contract + +````yaml +id: 7863726e-b980-40 +phase: implement +metadata: + consensus_reached: false +```` + +### [2026-04-23T05:50:44Z] documenter (CONSENSUS_CONFIRMED): Confirmed by documenter + +````yaml +id: 13ac79cf-8c58-45 +phase: implement +metadata: + consensus_reached: false +```` + +### [2026-04-23T05:50:50Z] tester → coder (CONSENSUS_ACK): ACK from tester for coder + +Reviewed gateway/gateway.py in commit dc5058a. Verified task-1-1 (pre-stream retry): _send_and_prime() correctly wraps client.send() and the first-chunk prime, re-raises only httpx.ReadError and httpx.RemoteProtocolError, closes the failed upstream in its own except branch before re-raising (no connection-pool leak), and the outer 'for attempt in range(2)' loop enforces a bounded 1x retry with logger.warning(container_id, error=str(reset_err)) between attempts and re-raise on exhaustion so the existing outer except returns 502. Correctly gated on bytes_seen == 0 (no byte yielded downstream yet). Verified task-1-2 (mid-stream synthetic frame): generate() now splits into a 'yield first_chunk if not None, then iterate primed_iterator' pattern wrapped in try/except (httpx.ReadError, httpx.RemoteProtocolError); on catch, emits a well-formed SSE frame 'event: error\ndata: {"type":"error","error":{"type":"api_error","message":"upstream connection reset"}}\n\n', feeds it through the accumulator via _consume_chunk (respects MAX_CAPTURE_SIZE budget), logs a warning with container_id and bytes_seen, and returns cleanly. The existing finally: upstream.close() and _capture_streaming_response behavior is preserved — generate() still returns via the normal path, and upstream.close() still runs because the finally: branch is untouched. All 50 tests in tests/gateway/test_anthropic_proxy.py pass (including my 4 new resilience tests) and the wider 129-test gateway/ suite is clean. ruff check, ruff format --check, and mypy are all green.\n### Non-blocking\n- **gateway/gateway.py:5278** — The retry loop swallows the first reset_err's full traceback when the retry succeeds. That's intentional (transparent retry) but worth a one-line comment acknowledging it for future maintainers. + +````yaml +id: 134d53ed-1469-4f +phase: implement +metadata: + payload: + artifact_references: + - gateway/gateway.py + reason: "Reviewed gateway/gateway.py in commit dc5058a. Verified task-1-1 (pre-stream\ + \ retry): _send_and_prime() correctly wraps client.send() and the first-chunk\ + \ prime, re-raises only httpx.ReadError and httpx.RemoteProtocolError, closes\ + \ the failed upstream in its own except branch before re-raising (no connection-pool\ + \ leak), and the outer 'for attempt in range(2)' loop enforces a bounded 1x\ + \ retry with logger.warning(container_id, error=str(reset_err)) between attempts\ + \ and re-raise on exhaustion so the existing outer except returns 502. Correctly\ + \ gated on bytes_seen == 0 (no byte yielded downstream yet). Verified task-1-2\ + \ (mid-stream synthetic frame): generate() now splits into a 'yield first_chunk\ + \ if not None, then iterate primed_iterator' pattern wrapped in try/except (httpx.ReadError,\ + \ httpx.RemoteProtocolError); on catch, emits a well-formed SSE frame 'event:\ + \ error\\ndata: {\"type\":\"error\",\"error\":{\"type\":\"api_error\",\"message\"\ + :\"upstream connection reset\"}}\\n\\n', feeds it through the accumulator via\ + \ _consume_chunk (respects MAX_CAPTURE_SIZE budget), logs a warning with container_id\ + \ and bytes_seen, and returns cleanly. The existing finally: upstream.close()\ + \ and _capture_streaming_response behavior is preserved \u2014 generate() still\ + \ returns via the normal path, and upstream.close() still runs because the finally:\ + \ branch is untouched. All 50 tests in tests/gateway/test_anthropic_proxy.py\ + \ pass (including my 4 new resilience tests) and the wider 129-test gateway/\ + \ suite is clean. ruff check, ruff format --check, and mypy are all green.\\\ + n### Non-blocking\\n- **gateway/gateway.py:5278** \u2014 The retry loop swallows\ + \ the first reset_err's full traceback when the retry succeeds. That's intentional\ + \ (transparent retry) but worth a one-line comment acknowledging it for future\ + \ maintainers." + version: 1 +```` + +### [2026-04-23T05:50:50Z] orchestrator → coder (STATUS): All reviewers have ACKed — ready to confirm + +All assigned reviewers have ACKed your proposal (version 1). Run `egg-orch consensus confirmed` to confirm. + +````yaml +id: afa044d8-8b48-4d +phase: implement +metadata: + fully_acked: true + version: 1 +```` + +### [2026-04-23T05:50:59Z] tester (CONSENSUS_CONFIRMED): Confirmed by tester (pending_acks) + +Producer tester cannot confirm: not fully ACKed. Pending reviewers: ['reviewer_code'] + +````yaml +id: 679e33a5-58a4-47 +phase: implement +metadata: + pending_acks: true +```` + +### [2026-04-23T05:52:30Z] reviewer_code → tester (CONSENSUS_ACK): ACK from reviewer_code for tester + + +Reviewed tests/gateway/test_anthropic_proxy.py additions at commit dda1f2ad7 (lines 542-813 in TestStreamingResponse, +269 lines total). Verified all tests trace to contract task-1-3 acceptance and that the test-execution evidence in the commit message is credible. + +### Test-execution evidence +Commit message reports 'pytest tests/gateway/test_anthropic_proxy.py -> 50 passed' and 'ruff check + ruff format --check clean'. Pre-patch test count in the file was 46 — adding 4 new tests brings it to 50 passed (math checks out). No tests_execution_blocked indicator; tester has actually run the suite. + +### Contract coverage (task-1-3) +Contract required three tests; tester provided four (three mandatory + one extra for the retry-exhausted 502 path): + +1. **test_streaming_send_reset_retries_once** — task-1-3(a): client.send() raises ReadError once then succeeds on retry. + Asserts send called exactly twice (bounded retry), 200 status, body contains message_start/message_stop, no 'event: error' frame present (retry-success path). + +2. **test_streaming_first_chunk_reset_retries_once** — task-1-3(b): first iter_bytes() pull raises ReadError, retry succeeds. + Uses _iter_then_raise([], ReadError) for empty-before-raise — exactly matches contract language 'simulating a reset before any byte is forwarded downstream.' Asserts bad_response.close() before good_response.close() (no half-open conn leaking into httpx keepalive pool). This is a stronger check than the contract required and catches a real class of connection-pool-leak regressions. + +3. **test_streaming_midstream_reset_yields_synthetic_error_frame** — task-1-3(c): iter_bytes raises RemoteProtocolError after one chunk. + Good depth: asserts no retry attempted (mock_client.send.call_count == 1), asserts upstream.close() still runs via finally, verifies first_chunk precedes error frame (ordering), asserts body.endswith(b'\n\n') (proper SSE terminator — the exact property that the downstream SDK's parser depends on to treat this as a complete event instead of a truncation), parses the synthetic frame as JSON to catch malformed output (type='error', error.type='api_error', message field present). Covers both JSON space formats ('"type": "api_error"' and '"type":"api_error"') so the test isn't brittle to json.dumps separators changing. + +4. **test_streaming_send_reset_retry_exhausted_returns_502** — Extra defense-in-depth. + Both attempts raise different exception types (ReadError on first, RemoteProtocolError on second); asserts send called exactly twice (bounded), 502 status, body contains 'api_error'. Guards against infinite-loop regression if someone accidentally widens the retry bound. + +### Helper +_iter_then_raise(chunks, exc) static method is the 'small helper to wrap an iterator so it raises after N yielded chunks' the contract calls for. Passing chunks=[] causes raise on first next() (empty-body-then-raise), matching the first-chunk-reset scenario. Passing [chunk1] causes raise on second next() (one-chunk-then-raise), matching the mid-stream scenario. Idiomatic and minimal. + +### Pattern fit +Test mocking style is consistent with pre-existing TestStreamingResponse tests (MagicMock with .status_code / .headers / .iter_bytes / .close; httpx.Headers for response headers; json.dumps body; client.post to the Flask test client; body = b''.join(response.response) to materialize the streamed body). No new fixture machinery required. + +### Regression coverage +All pre-existing streaming tests (test_streaming_request_detected, test_streaming_content_type_forwarded) still pass per commit message — 46 prior tests + 4 new = 50 passed, matches the reported count. + +### Non-blocking observations +- **test_anthropic_proxy.py:762** The midstream test asserts 'b"upstream connection reset" in body' — fine today because the synthetic message is a fixed literal, but if the error message becomes parameterized (e.g., include bytes_seen in the user-facing message), this assertion tightens into a regression trap. Consider a more abstract check ('error' in body's payload dict) if the message shape ever becomes dynamic. +- Test classes import httpx and httpx.Headers inside each function rather than at module scope. Pre-existing pattern in this file, so consistent — just noting. + + +````yaml +id: 537938e8-9162-4e +phase: implement +metadata: + payload: + artifact_references: + - tests/gateway/test_anthropic_proxy.py + - dda1f2ad7 + reason: "\nReviewed tests/gateway/test_anthropic_proxy.py additions at commit\ + \ dda1f2ad7 (lines 542-813 in TestStreamingResponse, +269 lines total). Verified\ + \ all tests trace to contract task-1-3 acceptance and that the test-execution\ + \ evidence in the commit message is credible.\n\n### Test-execution evidence\n\ + Commit message reports 'pytest tests/gateway/test_anthropic_proxy.py -> 50 passed'\ + \ and 'ruff check + ruff format --check clean'. Pre-patch test count in the\ + \ file was 46 \u2014 adding 4 new tests brings it to 50 passed (math checks\ + \ out). No tests_execution_blocked indicator; tester has actually run the suite.\n\ + \n### Contract coverage (task-1-3)\nContract required three tests; tester provided\ + \ four (three mandatory + one extra for the retry-exhausted 502 path):\n\n1.\ + \ **test_streaming_send_reset_retries_once** \u2014 task-1-3(a): client.send()\ + \ raises ReadError once then succeeds on retry.\n Asserts send called exactly\ + \ twice (bounded retry), 200 status, body contains message_start/message_stop,\ + \ no 'event: error' frame present (retry-success path).\n\n2. **test_streaming_first_chunk_reset_retries_once**\ + \ \u2014 task-1-3(b): first iter_bytes() pull raises ReadError, retry succeeds.\n\ + \ Uses _iter_then_raise([], ReadError) for empty-before-raise \u2014 exactly\ + \ matches contract language 'simulating a reset before any byte is forwarded\ + \ downstream.' Asserts bad_response.close() before good_response.close() (no\ + \ half-open conn leaking into httpx keepalive pool). This is a stronger check\ + \ than the contract required and catches a real class of connection-pool-leak\ + \ regressions.\n\n3. **test_streaming_midstream_reset_yields_synthetic_error_frame**\ + \ \u2014 task-1-3(c): iter_bytes raises RemoteProtocolError after one chunk.\n\ + \ Good depth: asserts no retry attempted (mock_client.send.call_count == 1),\ + \ asserts upstream.close() still runs via finally, verifies first_chunk precedes\ + \ error frame (ordering), asserts body.endswith(b'\\n\\n') (proper SSE terminator\ + \ \u2014 the exact property that the downstream SDK's parser depends on to treat\ + \ this as a complete event instead of a truncation), parses the synthetic frame\ + \ as JSON to catch malformed output (type='error', error.type='api_error', message\ + \ field present). Covers both JSON space formats ('\"type\": \"api_error\"'\ + \ and '\"type\":\"api_error\"') so the test isn't brittle to json.dumps separators\ + \ changing.\n\n4. **test_streaming_send_reset_retry_exhausted_returns_502**\ + \ \u2014 Extra defense-in-depth.\n Both attempts raise different exception\ + \ types (ReadError on first, RemoteProtocolError on second); asserts send called\ + \ exactly twice (bounded), 502 status, body contains 'api_error'. Guards against\ + \ infinite-loop regression if someone accidentally widens the retry bound.\n\ + \n### Helper\n_iter_then_raise(chunks, exc) static method is the 'small helper\ + \ to wrap an iterator so it raises after N yielded chunks' the contract calls\ + \ for. Passing chunks=[] causes raise on first next() (empty-body-then-raise),\ + \ matching the first-chunk-reset scenario. Passing [chunk1] causes raise on\ + \ second next() (one-chunk-then-raise), matching the mid-stream scenario. Idiomatic\ + \ and minimal.\n\n### Pattern fit\nTest mocking style is consistent with pre-existing\ + \ TestStreamingResponse tests (MagicMock with .status_code / .headers / .iter_bytes\ + \ / .close; httpx.Headers for response headers; json.dumps body; client.post\ + \ to the Flask test client; body = b''.join(response.response) to materialize\ + \ the streamed body). No new fixture machinery required.\n\n### Regression coverage\n\ + All pre-existing streaming tests (test_streaming_request_detected, test_streaming_content_type_forwarded)\ + \ still pass per commit message \u2014 46 prior tests + 4 new = 50 passed, matches\ + \ the reported count.\n\n### Non-blocking observations\n- **test_anthropic_proxy.py:762**\ + \ The midstream test asserts 'b\"upstream connection reset\" in body' \u2014\ + \ fine today because the synthetic message is a fixed literal, but if the error\ + \ message becomes parameterized (e.g., include bytes_seen in the user-facing\ + \ message), this assertion tightens into a regression trap. Consider a more\ + \ abstract check ('error' in body's payload dict) if the message shape ever\ + \ becomes dynamic.\n- Test classes import httpx and httpx.Headers inside each\ + \ function rather than at module scope. Pre-existing pattern in this file, so\ + \ consistent \u2014 just noting.\n" + version: 1 +```` + +### [2026-04-23T05:52:30Z] orchestrator → tester (STATUS): All reviewers have ACKed — ready to confirm + +All assigned reviewers have ACKed your proposal (version 1). Run `egg-orch consensus confirmed` to confirm. + +````yaml +id: f97d1463-7f31-4b +phase: implement +metadata: + fully_acked: true + version: 1 +```` + +### [2026-04-23T05:52:34Z] tester (CONSENSUS_CONFIRMED): Confirmed by tester + +````yaml +id: 0006d9b1-aee9-45 +phase: implement +metadata: + consensus_reached: false +```` + +### [2026-04-23T05:52:36Z] reviewer_code (CONSENSUS_CONFIRMED): Confirmed by reviewer_code + +````yaml +id: 5747dbbe-a6c4-4f +phase: implement +metadata: + consensus_reached: false +```` + +### [2026-04-23T05:54:22Z] coder (CONSENSUS_CONFIRMED): Confirmed by coder + +````yaml +id: a7434659-b746-46 +phase: implement +metadata: + consensus_reached: true +```` diff --git a/.egg-state/contracts/issue-1907-v2.json b/.egg-state/contracts/issue-1907-v2.json new file mode 100644 index 0000000000..ba476d056e --- /dev/null +++ b/.egg-state/contracts/issue-1907-v2.json @@ -0,0 +1,246 @@ +{ + "schemaVersion": "1.0", + "issue": { + "number": 1907, + "title": "Issue #1907", + "url": "https://github.com/jwbron/egg/issues/1907" + }, + "pipeline_id": "issue-1907-v2", + "current_phase": "refine", + "acceptance_criteria": [], + "phases": [ + { + "id": "phase-1", + "name": "Implement", + "status": "complete", + "review_cycles": 0, + "max_cycles": 3, + "escalated": false, + "escalation_reason": null, + "tasks": [ + { + "id": "task-1-1", + "description": "In gateway/gateway.py proxy_anthropic_messages() streaming branch, add bounded (1x) retry around client.send() and first-chunk prime on httpx.ReadError/RemoteProtocolError before any downstream byte has been yielded. Close the failed upstream, rebuild the request, retry once. On second failure, fall through to the existing error-return path.", + "status": "complete", + "commit": "dc5058ad5", + "checkpoint_id": null, + "notes": "", + "acceptance_criteria": "When client.send() raises ReadError once, the retry succeeds and downstream sees a clean 200 SSE response. When the first iter_bytes() call raises ReadError, the gateway re-primes and produces a normal stream. Both verified by new unit tests.", + "files_affected": [ + "gateway/gateway.py" + ], + "role": null, + "review_cycles": 0, + "max_cycles": 3, + "escalated": false + }, + { + "id": "task-1-2", + "description": "In the generate() closure inside proxy_anthropic_messages(), wrap the iter_bytes() for-loop with try/except for httpx.ReadError and httpx.RemoteProtocolError. On catch, yield a well-formed synthetic SSE frame (event: error with Anthropic-style payload), feed it through the accumulator, log a warning with container_id and bytes_seen, and return cleanly. Preserve the existing finally: upstream.close() and _capture_streaming_response behavior.", + "status": "complete", + "commit": "dc5058ad5", + "checkpoint_id": null, + "notes": "", + "acceptance_criteria": "When iter_bytes() raises after one chunk has been yielded, the downstream body contains the original chunk followed by a well-formed `event: error` SSE frame, the stream closes without raising, and _capture_streaming_response still runs. Verified by a new unit test.", + "files_affected": [ + "gateway/gateway.py" + ], + "role": null, + "review_cycles": 0, + "max_cycles": 3, + "escalated": false + }, + { + "id": "task-1-3", + "description": "In tests/gateway/test_anthropic_proxy.py, extend TestStreamingResponse with three tests covering: (a) client.send() raises ReadError once then succeeds on retry; (b) iter_bytes() raises on first iteration then succeeds on retry; (c) iter_bytes() raises RemoteProtocolError after one chunk and the downstream body ends with a synthetic event: error frame. Use a small helper to wrap an iterator so it raises after N yielded chunks.", + "status": "complete", + "commit": "dda1f2ad76ecbc08de27ada991a494fd725297d2", + "checkpoint_id": null, + "notes": "", + "acceptance_criteria": "All three new tests pass. 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Makes the gateway's `/v1/messages` proxy resilient to upstream Anthropic TCP resets.\n\n- (A) Pre-stream retry: if `client.send()` or the first `iter_bytes()` prime raises `httpx.ReadError`/`RemoteProtocolError` before any downstream byte has flowed, transparently re-issue the upstream request once. Downstream SDK never sees the error.\n- (B) Mid-stream synthetic error: if a reset arrives after bytes have already streamed, catch it inside `generate()`, yield a well-formed SSE `event: error` frame, and close the stream cleanly so the agent's SDK fails gracefully instead of dying on a truncated socket.\n\nDistinct from #1883 (gateway pod restart); this covers the gateway-healthy/upstream-unhealthy case where the fix belongs inside the gateway.", + "test_plan": "- Automated: new tests in `tests/gateway/test_anthropic_proxy.py::TestStreamingResponse` \u2014 `send()` reset \u2192 retry success, first-chunk reset \u2192 retry success, mid-stream reset \u2192 synthetic error frame. Existing streaming tests continue to pass.\n- Manual: run `pytest tests/gateway/test_anthropic_proxy.py -v` and confirm all green.", + "manual_steps": "Pre-merge: none beyond CI.\nPost-merge: observe gateway logs for `logger.warning(\"upstream reset\", ...)` entries over the next 24h to confirm the code path is exercising under real traffic and not spuriously triggering on healthy streams." + }, + "feedback": null, + "phase_configs": null, + "agent_executions": [] +} diff --git a/.egg-state/drafts/issue-1907-v2-analysis.md b/.egg-state/drafts/issue-1907-v2-analysis.md new file mode 100644 index 0000000000..59c054edc7 --- /dev/null +++ b/.egg-state/drafts/issue-1907-v2-analysis.md @@ -0,0 +1,25 @@ +## Task Analysis + +**Problem statement**: When the upstream Anthropic API resets a long-running SSE TCP connection (RST mid-stream), the gateway surfaces the read error directly to the agent's SDK as a fatal `socket connection was closed unexpectedly`. The agent exits, consensus-wrapper stops respawning, and the Job hits `BackoffLimitExceeded` — losing all in-flight work even though the gateway itself is healthy and still serving other agents on the same pod. + +**Source context**: Incident on 2026-04-22 23:54 UTC, pipeline `issue-1901` plan phase. The architect agent had built 282s / 32 turns / $1.33 of context, then lost everything on a single upstream RST. Gateway pod was healthy (35min old, 0 restarts, 1.4–2.2Gi/4Gi memory). Two back-to-back ECONNRESET events were observed in the gateway log window, suggesting this is routine upstream LB/edge behavior, not a one-off. Distinct from #1883 (gateway *process* restart) and #1873 (turn-1 transient retry) — this happened mid-generation with the gateway up. + +**Workarounds**: None per the issue — the failure is fatal. Adjacent issues (#1883 C/D, #1873) would partially help but restart the turn from scratch, so they don't preserve in-flight work either. + +**System context**: `gateway/gateway.py:5202` `proxy_anthropic_messages()` is the Flask endpoint that proxies agent → Anthropic SSE. Flow: build headers → `client.send(http_request, stream=True)` (line 5251) → yield upstream chunks via a `generate()` closure that iterates `upstream.iter_bytes()` (lines 5270–5301) back through `stream_with_context`. The top-level `try/except httpx.ConnectError/TimeoutException/Exception` block (lines 5333–5364) only catches errors raised *before* the `Response` is returned — once streaming begins, exceptions from `iter_bytes()` bubble into waitress's generator consumption and the downstream client sees a truncated socket with no terminating SSE event. Tests live at `tests/gateway/test_anthropic_proxy.py` (`TestStreamingResponse` class already mocks `upstream.iter_bytes`, giving a pattern for reset-simulation tests). + +**Technical root cause**: Two distinct code locations need handling, per the issue's recommendation: +1. **Pre-stream connection-pool stale conn**: `client.send(...)` or the very first `next(upstream.iter_bytes())` can raise `httpx.ReadError` / `RemoteProtocolError` before any downstream bytes have flowed. The gateway currently propagates these as 502 (via the generic `except Exception`) — but since no bytes have gone to the agent, the gateway can transparently re-issue upstream. +2. **Mid-stream upstream RST**: Inside the `for chunk in upstream.iter_bytes()` loop at line 5273, when httpcore raises `ReadError: [Errno 104] Connection reset by peer`, the exception bubbles out of `generate()` with no terminal SSE event written. The SDK's stream-parsing side sees a half-open socket, reports fatal error, and the `finally: upstream.close()` at line 5287 also triggers the `RuntimeError: aclose(): asynchronous generator is already running` side-effect mentioned in the issue. + +**Files affected**: +- `gateway/gateway.py` — modify `proxy_anthropic_messages()` and its `generate()` closure (~5240–5308): add pre-stream retry logic around `client.send` + first-byte boundary, and wrap the `iter_bytes()` loop to emit a synthetic `event: error` SSE frame on `httpx.ReadError` / `RemoteProtocolError`. +- `tests/gateway/test_anthropic_proxy.py` — extend `TestStreamingResponse` with two new tests: (1) `iter_bytes()` raising `ReadError` before any chunk → expect transparent retry success, and (2) raising `ReadError` after one chunk → expect synthetic `event: error` SSE frame + clean stream close. The existing mock pattern can be extended to have the iterator raise. + +**Risks / edge cases**: +- **Pre-stream retry must be bounded** — at most one retry, and only if the upstream error happens before the first downstream byte is yielded. Retrying mid-stream is unsafe (Anthropic has no resume tokens and the partial response is orphaned). +- **Non-idempotent requests** — `/v1/messages` is safe to retry at the HTTP level (Anthropic treats each POST independently; token accounting is per-request). No risk of double-billing for a single yielded response since the first attempt yielded nothing downstream. +- **Must catch both `httpx.ReadError` and `httpx.RemoteProtocolError`** — connection resets can surface as either depending on where in httpcore's state machine the RST arrives. +- **Synthetic SSE `event: error` frame must be well-formed** — Claude SDK parses SSE on event boundaries; a malformed frame could make the current bug worse, not better. Use the Anthropic-style `{"type": "error", "error": {...}}` payload that the `_SSEAccumulator._process_event` already handles at `gateway/gateway.py:5114`. +- **Capture-to-transcript side effect** — the `_capture_streaming_response` call in the `finally` block must still run even on mid-stream error, so operators retain a record of the failed generation. +- **`stream_with_context` + waitress** — the retry must happen before we return the `Response` object, since once waitress starts consuming the generator we've already committed headers downstream. This aligns naturally with (A) being "before any bytes flow." \ No newline at end of file diff --git a/.egg-state/drafts/issue-1907-v2-plan.md b/.egg-state/drafts/issue-1907-v2-plan.md new file mode 100644 index 0000000000..f8c2a6dcd7 --- /dev/null +++ b/.egg-state/drafts/issue-1907-v2-plan.md @@ -0,0 +1,62 @@ +# Plan: Make gateway `/v1/messages` proxy resilient to upstream TCP resets + +## Summary + +Make the gateway's Anthropic `/v1/messages` proxy resilient to two classes of upstream TCP resets: (A) pre-stream resets (connection-pool stale conn, very-early RST) are handled by a bounded transparent retry — downstream SDK never sees an error; (B) mid-stream resets are caught inside the `iter_bytes()` loop and surfaced as a well-formed synthetic SSE `event: error` frame, letting the SDK fail gracefully instead of dying on a truncated socket. Both fixes live entirely inside `proxy_anthropic_messages()` in `gateway/gateway.py`. The issue explicitly recommends both as complementary — (A) catches the cheap case transparently, (B) makes the unavoidable mid-stream case recoverable at the agent layer. Neither attempts full stream resumption (Anthropic has no resume tokens; partial generation is lost on mid-stream reset regardless). + +**Risks / edge cases**: +- Pre-stream retry must be capped at one attempt and conditional on zero downstream bytes having flowed — retrying after any chunk has been yielded is unsafe (Anthropic treats each POST independently, would double-charge and produce two divergent generations mixed on the downstream wire). +- Must catch both `httpx.ReadError` and `httpx.RemoteProtocolError` — ECONNRESET surfaces as either depending on where in httpcore's state machine the RST arrives. +- Synthetic SSE frame must conform to Anthropic's error-event format (`event: error\ndata: {"type": "error", "error": {...}}\n\n`); `_SSEAccumulator._process_event` at `gateway/gateway.py:5114` already handles that payload shape, so the synthetic event round-trips correctly through the existing accumulator for transcript capture. +- The existing `finally: upstream.close()` + `_capture_streaming_response` path at `gateway/gateway.py:5286–5301` must still execute on mid-stream error so operators retain a transcript of the failed generation. +- Existing top-level `except httpx.ConnectError / TimeoutException / Exception` at `gateway/gateway.py:5333–5364` keeps its current behavior for non-reset errors. Only `ReadError` and `RemoteProtocolError` paths change. + +## Implementation + +### Phase 1: Implement + +Add gateway-side resilience for upstream TCP resets on `/v1/messages` streaming requests. + +**Tasks**: +1. **[task-1-1]** In `gateway/gateway.py`, inside `proxy_anthropic_messages()` streaming branch (lines ~5241–5308), add a bounded pre-stream retry around `client.send(http_request, stream=True)` plus the first-chunk prime. On `httpx.ReadError` or `httpx.RemoteProtocolError` raised before any downstream byte has been yielded, close the failed upstream, rebuild the request, and retry once. If the second attempt succeeds, proceed normally. If it fails too, fall through to the existing error-return path. Acceptance: verified by test 1-3(a) and 1-3(b). +2. **[task-1-2]** In the same function's `generate()` closure (lines ~5270–5301), wrap the `for chunk in upstream.iter_bytes()` loop with a try/except for `httpx.ReadError` and `httpx.RemoteProtocolError`. On catch, yield a synthetic SSE frame shaped as `event: error\ndata: {"type": "error", "error": {"type": "api_error", "message": "upstream connection reset"}}\n\n` then return cleanly. Feed the synthetic frame into the accumulator so transcript capture records it. Preserve the existing `finally: upstream.close()` + `_capture_streaming_response` behavior. Log the reset with `logger.warning` including `container_id` and `bytes_seen` so operators can correlate with incident analysis. Acceptance: verified by test 1-3(c). +3. **[task-1-3]** In `tests/gateway/test_anthropic_proxy.py`, extend `TestStreamingResponse` with three new tests: (a) `client.send()` raises `httpx.ReadError` once, second attempt returns a valid iterator — assert downstream sees a clean 200 SSE response and `send` was called twice; (b) `iter_bytes()` yields nothing and raises `httpx.ReadError` on first iteration → expect the retry path to re-prime and produce a normal stream; (c) `iter_bytes()` yields one chunk then raises `httpx.RemoteProtocolError` → expect the downstream body to contain the original chunk followed by a well-formed `event: error` SSE frame and the stream to close without exception. Use the existing `mock_response.iter_bytes = MagicMock(return_value=iter([...]))` pattern, wrapping the iterator in a helper that raises after N chunks. Acceptance: all three tests pass; existing streaming tests continue to pass. + +```yaml +# yaml-tasks +pr: + title: "Gateway: retry pre-stream ECONNRESET, synthesize SSE error on mid-stream reset" + description: | + Fixes #1907. Makes the gateway's `/v1/messages` proxy resilient to upstream Anthropic TCP resets. + + - (A) Pre-stream retry: if `client.send()` or the first `iter_bytes()` prime raises `httpx.ReadError`/`RemoteProtocolError` before any downstream byte has flowed, transparently re-issue the upstream request once. Downstream SDK never sees the error. + - (B) Mid-stream synthetic error: if a reset arrives after bytes have already streamed, catch it inside `generate()`, yield a well-formed SSE `event: error` frame, and close the stream cleanly so the agent's SDK fails gracefully instead of dying on a truncated socket. + + Distinct from #1883 (gateway pod restart); this covers the gateway-healthy/upstream-unhealthy case where the fix belongs inside the gateway. + test_plan: | + - Automated: new tests in `tests/gateway/test_anthropic_proxy.py::TestStreamingResponse` — `send()` reset → retry success, first-chunk reset → retry success, mid-stream reset → synthetic error frame. Existing streaming tests continue to pass. + - Manual: run `pytest tests/gateway/test_anthropic_proxy.py -v` and confirm all green. + manual_steps: | + Pre-merge: none beyond CI. + Post-merge: observe gateway logs for `logger.warning("upstream reset", ...)` entries over the next 24h to confirm the code path is exercising under real traffic and not spuriously triggering on healthy streams. +phases: + - id: 1 + name: Implement + goal: "Gateway transparently retries pre-stream upstream resets and emits a clean SSE error event on mid-stream resets" + tasks: + - id: task-1-1 + description: "In gateway/gateway.py proxy_anthropic_messages() streaming branch, add bounded (1x) retry around client.send() and first-chunk prime on httpx.ReadError/RemoteProtocolError before any downstream byte has been yielded. Close the failed upstream, rebuild the request, retry once. On second failure, fall through to the existing error-return path." + acceptance: "When client.send() raises ReadError once, the retry succeeds and downstream sees a clean 200 SSE response. When the first iter_bytes() call raises ReadError, the gateway re-primes and produces a normal stream. Both verified by new unit tests." + files: + - gateway/gateway.py + - id: task-1-2 + description: "In the generate() closure inside proxy_anthropic_messages(), wrap the iter_bytes() for-loop with try/except for httpx.ReadError and httpx.RemoteProtocolError. On catch, yield a well-formed synthetic SSE frame (event: error with Anthropic-style payload), feed it through the accumulator, log a warning with container_id and bytes_seen, and return cleanly. Preserve the existing finally: upstream.close() and _capture_streaming_response behavior." + acceptance: "When iter_bytes() raises after one chunk has been yielded, the downstream body contains the original chunk followed by a well-formed `event: error` SSE frame, the stream closes without raising, and _capture_streaming_response still runs. Verified by a new unit test." + files: + - gateway/gateway.py + - id: task-1-3 + description: "In tests/gateway/test_anthropic_proxy.py, extend TestStreamingResponse with three tests covering: (a) client.send() raises ReadError once then succeeds on retry; (b) iter_bytes() raises on first iteration then succeeds on retry; (c) iter_bytes() raises RemoteProtocolError after one chunk and the downstream body ends with a synthetic event: error frame. Use a small helper to wrap an iterator so it raises after N yielded chunks." + acceptance: "All three new tests pass. Existing tests in TestStreamingResponse (test_streaming_request_detected, test_streaming_content_type_forwarded) continue to pass." + files: + - tests/gateway/test_anthropic_proxy.py +``` diff --git a/docs/architecture/credential-injection.md b/docs/architecture/credential-injection.md index 4f99670cc2..ea7751ca61 100644 --- a/docs/architecture/credential-injection.md +++ b/docs/architecture/credential-injection.md @@ -56,6 +56,24 @@ Both modes use the same `ANTHROPIC_BASE_URL` mechanism: - Streaming responses via Flask's `stream_with_context` (no buffering) - Header blocklist approach: forwards all headers except auth-related ones - Full error passthrough including `x-request-id` for debugging +- **Upstream stream-reset resilience** (see [Upstream Stream Resilience](#upstream-stream-resilience) below) + +### Upstream Stream Resilience + +Long-running Anthropic `/v1/messages` SSE responses occasionally terminate with an upstream TCP reset (ECONNRESET) — the LB/edge idle-times the connection, the proxy rebalances, or a middlebox closes the socket mid-stream. Without mitigation, `httpx` surfaces this as `httpx.ReadError` / `httpx.RemoteProtocolError`, the downstream SDK sees a truncated SSE stream with no terminating event, and the agent dies on a fatal `socket connection was closed unexpectedly` — losing all in-flight work (see [#1907](https://github.com/jwbron/egg/issues/1907)). + +The gateway's `proxy_anthropic_messages()` handles this in two complementary ways: + +| Reset timing | Gateway behavior | Agent-visible effect | +|--------------|------------------|----------------------| +| **Pre-stream** (on `client.send()` or before the first downstream byte) | Close the failed upstream, rebuild the request, retry once. If the retry succeeds, proceed normally; if it also fails, fall through to the existing 502 error path. | None — the retry is transparent. | +| **Mid-stream** (after downstream bytes have already flowed) | Catch the `ReadError` / `RemoteProtocolError` inside the `iter_bytes()` loop, emit a well-formed synthetic SSE `event: error` frame with an Anthropic-style payload, feed it through the accumulator so the transcript still captures the failure, and close the stream cleanly. `finally: upstream.close()` + `_capture_streaming_response` continue to run. A `logger.warning` records the reset with `container_id` and `bytes_seen`. | A clean SSE `error` event instead of a truncated socket. The SDK reports a recoverable error rather than a fatal hang-up, and the `aclose()` cleanup bug is avoided. | + +**Why not full stream resumption?** Anthropic's API exposes no resume tokens, and the partial generation on the wire is orphaned once the upstream socket dies. Mid-stream retry would risk double-charging and interleaving two divergent generations on the downstream wire. Pre-stream retry is safe because by definition no downstream bytes have been committed yet. + +**Bounded retry.** The pre-stream retry is capped at one attempt and is gated on the first chunk not yet having been yielded downstream (enforced structurally by `_send_and_prime()`, which raises before `generate()` begins). Second-failure cases fall through to the pre-existing `except httpx.ConnectError / TimeoutException / Exception` handlers, preserving their 502/504 error contracts. + +**Scope.** This fix lives entirely inside the gateway. It is distinct from [#1883](https://github.com/jwbron/egg/issues/1883) (gateway pod restart — gateway *process* is gone) and [#1873](https://github.com/jwbron/egg/issues/1873) (turn-1 transient retry in `consensus-wrapper`). Those handle cases where the gateway itself cannot re-issue the upstream request; this handles the far more common case where the gateway is healthy and only a single upstream connection died. ### Container Configuration diff --git a/gateway/README.md b/gateway/README.md index 2ec5cbbbb1..95faeb653e 100644 --- a/gateway/README.md +++ b/gateway/README.md @@ -421,7 +421,14 @@ POST /api/v1/git/execute ``` POST /v1/messages - Description: Proxy for Anthropic messages API with credential injection + Description: Proxy for Anthropic messages API with credential injection. + Streaming responses survive upstream TCP resets — a bounded + single pre-stream retry covers resets before any byte has + been yielded downstream; mid-stream resets are surfaced as + a synthetic SSE `event: error` frame so the SDK fails + cleanly instead of dying on a truncated socket. + See ../docs/architecture/credential-injection.md + ("Upstream Stream Resilience") for design rationale. POST /v1/messages/count_tokens Description: Proxy for Anthropic token counting API @@ -555,6 +562,8 @@ Both methods clear all in-memory config caches so the next access re-reads from 10. **Concurrent-mode push enforcement**: In BRC mode, direct `git push` is blocked — agents must use `egg-orch consensus propose --push`. This makes the "all changes must be reviewed" invariant structural rather than relying on agent compliance. A `consensus_push` marker flows from the orch CLI directly to the gateway API (bypassing the git wrapper), distinguishing protocol-originated pushes from direct pushes. A `CONCURRENT_PUSH_ENFORCEMENT` killswitch follows the same pattern as `PUSH_TARGET_ENFORCEMENT` for emergency bypass. +11. **Upstream stream-reset resilience (Anthropic proxy)**: `proxy_anthropic_messages()` applies two asymmetric mitigations for `httpx.ReadError` / `httpx.RemoteProtocolError` on long-running SSE responses. A *pre-stream* retry (bounded to one attempt, gated on the first chunk not yet having been yielded downstream) transparently re-issues the upstream request when the reset lands before any downstream byte. A *mid-stream* synthetic SSE `event: error` frame is emitted when the reset lands after bytes have already flowed, because Anthropic exposes no resume tokens and mid-stream retry would risk double-charging and interleaving divergent generations. Full details in [credential-injection.md](../docs/architecture/credential-injection.md#upstream-stream-resilience). Distinct from gateway-pod-restart handling (#1883) and turn-1 consensus-wrapper retry (#1873). + ## Testing ```bash diff --git a/gateway/gateway.py b/gateway/gateway.py index 784c998862..aacbbcd7be 100644 --- a/gateway/gateway.py +++ b/gateway/gateway.py @@ -5241,14 +5241,79 @@ def proxy_anthropic_messages() -> tuple[Response, int] | Response: try: if is_streaming: # Stream SSE response using httpx's send() with stream=True - # This gives us direct control over the response lifecycle - http_request = client.build_request( - "POST", - "/v1/messages", - headers=headers, - content=request_body, - ) - upstream = client.send(http_request, stream=True) + # This gives us direct control over the response lifecycle. + # + # Resilience strategy (see #1907): + # (A) Pre-stream retry — if the upstream TCP connection resets + # before any byte has been yielded downstream, open a fresh + # upstream connection and retry the request once. The + # downstream SDK never sees the error. Covers + # connection-pool staleness and very-early resets. + # (B) Mid-stream synthetic error — if the reset happens after + # bytes have already flowed, emit a well-formed SSE + # ``event: error`` frame and close the downstream stream + # cleanly. Lets the SDK fail gracefully instead of dying + # on a truncated socket. + # + # Full stream resumption is not attempted — Anthropic's API has + # no resume tokens, and the partial generation on the wire is + # orphaned on any mid-stream reset regardless. + def _send_and_prime() -> tuple[Any, Any, bytes | None]: + """Send upstream request and pre-fetch the first chunk. + + Returns ``(upstream_response, iterator, first_chunk)`` where + ``first_chunk`` is ``None`` if upstream returned an empty + body. Raises ``httpx.ReadError`` or + ``httpx.RemoteProtocolError`` if the connection resets during + ``send()`` or the first ``iter_bytes()`` call — callers use + that signal to retry transparently. + """ + http_req = client.build_request( + "POST", + "/v1/messages", + headers=headers, + content=request_body, + ) + upstream_resp = client.send(http_req, stream=True) + try: + iterator = upstream_resp.iter_bytes() + try: + first = next(iterator) + except StopIteration: + first = None + return upstream_resp, iterator, first + except BaseException: + # Close the failed upstream so the caller's retry can + # open a fresh connection without leaking the old one. + # Broad catch ensures cleanup on *any* exception from + # iter_bytes() / next(), not just the two transport + # errors we expect. + try: + upstream_resp.close() + except Exception: + pass + raise + + upstream: Any = None + primed_iterator: Any = None + first_chunk: bytes | None = None + for attempt in range(2): + try: + upstream, primed_iterator, first_chunk = _send_and_prime() + break + except (httpx.ReadError, httpx.RemoteProtocolError) as reset_err: + if attempt == 0: + logger.warning( + "Upstream Anthropic connection reset before any byte " + "was forwarded; retrying once", + container_id=container_id, + error=str(reset_err), + ) + continue + # Retry exhausted — fall through to the outer + # exception handler which returns a 502 to the caller. + raise + response_headers = _filter_response_headers(upstream.headers) # Forward actual Content-Type from upstream (usually text/event-stream) content_type = upstream.headers.get("content-type", "text/event-stream") @@ -5267,22 +5332,59 @@ def proxy_anthropic_messages() -> tuple[Response, int] | Response: bytes_seen = 0 capture_truncated = False - def generate() -> Any: + def _consume_chunk(chunk: bytes) -> None: + """Feed a chunk into the capture accumulator if under budget.""" nonlocal bytes_seen, capture_truncated + if accumulator is not None and not capture_truncated: + if bytes_seen + len(chunk) <= MAX_CAPTURE_SIZE: + accumulator.feed(chunk) + bytes_seen += len(chunk) + else: + capture_truncated = True + logger.debug( + "Streaming capture truncated due to size limit", + container_id=container_id, + size_limit=MAX_CAPTURE_SIZE, + ) + + def generate() -> Any: try: - for chunk in upstream.iter_bytes(): - if accumulator is not None and not capture_truncated: - if bytes_seen + len(chunk) <= MAX_CAPTURE_SIZE: - accumulator.feed(chunk) - bytes_seen += len(chunk) - else: - capture_truncated = True - logger.debug( - "Streaming capture truncated due to size limit", - container_id=container_id, - size_limit=MAX_CAPTURE_SIZE, - ) - yield chunk + try: + if first_chunk is not None: + _consume_chunk(first_chunk) + yield first_chunk + for chunk in primed_iterator: + _consume_chunk(chunk) + yield chunk + except (httpx.ReadError, httpx.RemoteProtocolError) as mid_err: + # Mid-stream reset: emit a synthetic SSE `error` + # frame so the downstream SDK treats this as a + # clean API error instead of a truncated socket. + # The frame shape matches Anthropic's documented + # error event and is parsed by ``_SSEAccumulator`` + # so operators still see the failed turn in the + # captured transcript. + logger.warning( + "Upstream Anthropic stream reset mid-response; " + "emitting synthetic SSE error frame", + container_id=container_id, + bytes_seen=bytes_seen, + error=str(mid_err), + ) + error_payload = { + "type": "error", + "error": { + "type": "api_error", + "message": "upstream connection reset", + }, + } + error_frame = ( + b"event: error\ndata: " + + json.dumps(error_payload).encode("utf-8") + + b"\n\n" + ) + _consume_chunk(error_frame) + yield error_frame finally: upstream.close() if accumulator is not None and container_id: diff --git a/tests/gateway/test_anthropic_proxy.py b/tests/gateway/test_anthropic_proxy.py index fda4f9ab78..3bb9fd18c7 100644 --- a/tests/gateway/test_anthropic_proxy.py +++ b/tests/gateway/test_anthropic_proxy.py @@ -542,6 +542,275 @@ def test_streaming_content_type_forwarded(self, client, mock_credentials): assert "text/event-stream" in response.content_type + # ------------------------------------------------------------------ + # Upstream TCP-reset resilience tests (issue #1907). + # + # The gateway's /v1/messages proxy wraps the upstream stream with two + # complementary pieces of resilience machinery in proxy_anthropic_messages(): + # + # (A) Pre-stream bounded (1x) retry around ``client.send()`` and the + # first-chunk prime — if httpx raises ReadError or + # RemoteProtocolError before any byte has flowed downstream, the + # gateway tears down the failed upstream and reissues the request + # transparently. The SDK never sees the reset. + # + # (B) Mid-stream synthetic error frame — if the reset arrives after a + # chunk has already been yielded downstream, the gateway catches + # the exception inside ``generate()``, emits an Anthropic-style + # ``event: error`` SSE frame, and closes the stream cleanly so the + # downstream SDK fails gracefully instead of dying on a truncated + # socket. + # + # Each scenario below drives the exact failure mode that triggered the + # original crash (pipeline issue-1901 lost 282s / 32 turns / $1.33 of + # context to a bare ReadError propagated from httpcore). + # ------------------------------------------------------------------ + + @staticmethod + def _iter_then_raise(chunks, exc): + """Yield each chunk in order, then raise ``exc``. + + Small helper for simulating upstream TCP resets during SSE streaming. + Passing an empty ``chunks`` list causes ``exc`` to be raised on the + very first ``next()`` pull (simulating a reset before any byte is + forwarded downstream). Passing N chunks causes the raise to land on + pull N+1 (simulating a mid-stream reset after N chunks have been + yielded). + """ + yield from chunks + raise exc + + def test_streaming_send_reset_retries_once(self, client, mock_credentials): + """(a) client.send() raises ReadError once; retry succeeds with clean 200 SSE. + + Covers task-1-1 acceptance: ``When client.send() raises ReadError + once, the retry succeeds and downstream sees a clean 200 SSE response.`` + """ + import httpx + from httpx import Headers + + with patch("gateway.gateway.get_anthropic_client") as mock_get: + mock_client = MagicMock() + mock_get.return_value = mock_client + + good_chunks = [ + b'event: message_start\ndata: {"type":"message_start"}\n\n', + b'event: content_block_delta\ndata: {"type":"content_block_delta"}\n\n', + b'event: message_stop\ndata: {"type":"message_stop"}\n\n', + ] + good_response = MagicMock() + good_response.status_code = 200 + good_response.headers = Headers([("content-type", "text/event-stream")]) + good_response.iter_bytes = MagicMock(return_value=iter(good_chunks)) + good_response.close = MagicMock() + + mock_client.build_request.return_value = MagicMock() + # First send() raises ReadError; second returns the good response. + mock_client.send.side_effect = [ + httpx.ReadError("connection reset by peer"), + good_response, + ] + + response = client.post( + "/v1/messages", + data=json.dumps({"model": "claude-3", "stream": True}), + content_type="application/json", + ) + + # The gateway retried exactly once (bounded 1x retry). + assert mock_client.send.call_count == 2 + # Downstream saw a clean 200 with the full good response body. + assert response.status_code == 200 + body = b"".join(response.response) + assert b"message_start" in body + assert b"message_stop" in body + # Retry succeeded, so no synthetic error frame should be emitted. + assert b"event: error" not in body + # Upstream released via the finally: branch. + good_response.close.assert_called() + + def test_streaming_first_chunk_reset_retries_once(self, client, mock_credentials): + """(b) iter_bytes() raises on first pull once; retry succeeds. + + Covers task-1-1 acceptance: ``When the first iter_bytes() call + raises ReadError, the gateway re-primes and produces a normal stream.`` + Simulates an upstream reset that happens after the TCP connection + established but before the first SSE byte — a common + connection-pool-staleness failure mode at Anthropic's edge. + """ + import httpx + from httpx import Headers + + with patch("gateway.gateway.get_anthropic_client") as mock_get: + mock_client = MagicMock() + mock_get.return_value = mock_client + + # First upstream: iter_bytes returns a generator that raises on + # the first next() pull — i.e., no chunk is ever yielded downstream. + bad_response = MagicMock() + bad_response.status_code = 200 + bad_response.headers = Headers([("content-type", "text/event-stream")]) + bad_response.iter_bytes = MagicMock( + return_value=self._iter_then_raise( + [], httpx.ReadError("peer reset during first-chunk prime") + ) + ) + bad_response.close = MagicMock() + + # Second upstream: healthy normal stream. + good_chunks = [ + b'event: message_start\ndata: {"type":"message_start"}\n\n', + b'event: message_stop\ndata: {"type":"message_stop"}\n\n', + ] + good_response = MagicMock() + good_response.status_code = 200 + good_response.headers = Headers([("content-type", "text/event-stream")]) + good_response.iter_bytes = MagicMock(return_value=iter(good_chunks)) + good_response.close = MagicMock() + + mock_client.build_request.return_value = MagicMock() + mock_client.send.side_effect = [bad_response, good_response] + + response = client.post( + "/v1/messages", + data=json.dumps({"model": "claude-3", "stream": True}), + content_type="application/json", + ) + + # Exactly one retry happened. + assert mock_client.send.call_count == 2 + # The failed upstream must be closed so the connection isn't leaked + # back into the httpx connection pool in a half-open state. + bad_response.close.assert_called() + # Downstream saw a clean 200 with the healthy stream body. + assert response.status_code == 200 + body = b"".join(response.response) + assert b"message_start" in body + assert b"message_stop" in body + assert b"event: error" not in body + good_response.close.assert_called() + + def test_streaming_midstream_reset_yields_synthetic_error_frame(self, client, mock_credentials): + """(c) RemoteProtocolError after first chunk; body ends with synthetic error frame. + + Covers task-1-2 acceptance: ``When iter_bytes() raises after one + chunk has been yielded, the downstream body contains the original + chunk followed by a well-formed `event: error` SSE frame, the + stream closes without raising, and _capture_streaming_response + still runs.`` No retry is attempted here because a byte has already + flowed downstream — the gateway cannot re-issue idempotently once + the SDK has begun parsing SSE events. + """ + import httpx + from httpx import Headers + + with patch("gateway.gateway.get_anthropic_client") as mock_get: + mock_client = MagicMock() + mock_get.return_value = mock_client + + first_chunk = ( + b"event: message_start\n" + b'data: {"type":"message_start","message":' + b'{"id":"msg_abc","model":"claude-3","role":"assistant"}}\n\n' + ) + mid_reset_response = MagicMock() + mid_reset_response.status_code = 200 + mid_reset_response.headers = Headers([("content-type", "text/event-stream")]) + # Yield one valid SSE chunk, then simulate Anthropic's edge + # dropping the connection mid-stream (the exact failure mode + # from #1901 — httpx surfaces it as RemoteProtocolError when + # the peer closes without sending a complete body). + mid_reset_response.iter_bytes = MagicMock( + return_value=self._iter_then_raise( + [first_chunk], + httpx.RemoteProtocolError( + "peer closed connection without sending complete message body" + ), + ) + ) + mid_reset_response.close = MagicMock() + + mock_client.build_request.return_value = MagicMock() + mock_client.send.return_value = mid_reset_response + + response = client.post( + "/v1/messages", + data=json.dumps({"model": "claude-3", "stream": True}), + content_type="application/json", + ) + + # No retry — a chunk was already forwarded downstream. + assert mock_client.send.call_count == 1 + + assert response.status_code == 200 + # Consume the body first — the finally: branch that calls + # upstream.close() runs when the streaming generator is + # exhausted, not when Flask returns the Response object. + body = b"".join(response.response) + + # Upstream still released via the finally: branch even though + # iter_bytes raised. + mid_reset_response.close.assert_called() + + # The original (pre-reset) chunk is preserved intact. + assert first_chunk in body + + # The body ends with a well-formed Anthropic-style SSE error frame. + assert b"event: error" in body + # The error event must carry an ``api_error`` type and a message + # field — the shape the Claude SDK's error handler understands. + assert b'"type": "api_error"' in body or b'"type":"api_error"' in body + assert b"upstream connection reset" in body + # And the SSE frame terminator is the last thing on the wire so + # the downstream parser sees a complete event, not a truncation. + assert body.endswith(b"\n\n") + # Synthetic error frame must come AFTER the original chunk, not + # interleaved or before it. + assert body.index(first_chunk) < body.index(b"event: error") + + # Parse the synthetic frame as JSON to catch any malformed output. + error_frame_start = body.index(b"event: error") + error_frame = body[error_frame_start:] + assert error_frame.startswith(b"event: error\ndata: ") + data_start = len(b"event: error\ndata: ") + data_end = error_frame.index(b"\n\n") + payload = json.loads(error_frame[data_start:data_end].decode("utf-8")) + assert payload["type"] == "error" + assert payload["error"]["type"] == "api_error" + assert "message" in payload["error"] + + def test_streaming_send_reset_retry_exhausted_returns_502(self, client, mock_credentials): + """Both attempts raise — retry exhausted, falls through to 502. + + Covers the ``On second failure, fall through to the existing + error-return path`` clause of task-1-1. Exhaustion must not loop + infinitely and must not leak an unclosed upstream. + """ + import httpx + + with patch("gateway.gateway.get_anthropic_client") as mock_get: + mock_client = MagicMock() + mock_get.return_value = mock_client + + mock_client.build_request.return_value = MagicMock() + mock_client.send.side_effect = [ + httpx.ReadError("reset #1"), + httpx.RemoteProtocolError("reset #2"), + ] + + response = client.post( + "/v1/messages", + data=json.dumps({"model": "claude-3", "stream": True}), + content_type="application/json", + ) + + # Exactly two attempts — retry is bounded to 1x. + assert mock_client.send.call_count == 2 + # Falls through to the generic exception handler → 502. + assert response.status_code == 502 + body = response.get_data() + assert b"api_error" in body + class TestFilterBlockedTools: """Test _filter_blocked_tools helper for private mode security."""