[issue-3596][slice-1/5] Wire detection plane into runtime tick...

.egg-state/agent-outputs/coder/brc-memory-issue-3596-v2.md

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+# BRC Memory — Issue #3596 (coder)
+
+## Pipeline Context
+- Issue: #3596 — Operator cannot tell a working agent from a wedged one
+- Role: coder
+- Phase: implement (per BRC event)
+
+## Operator's cq-1 Resolution (binding)
+The operator resolved cq-1 with a detailed response:
+1. The detection plane IS already wired and IS evaluated in production — do NOT add a new tick or invocation path.
+2. The actual defect is that `snapshot_from_health_context` populates only 5 of 13 top-level fields and 3 of 7 RunningAgent fields.
+3. Fix `role=str(cid)` defect — container IDs are mapped to agent roles via pipeline state.
+4. Scope: four narrow-and-deep items (snapshot enrichment, forward-progress detector, peer-progress gate fix, status enrichment).
+5. Null is not zero — any new progress field must be null when unmeasurable.
+6. Session transcripts remain a real gap — agent_log_store captures at Job removal, not at event-pod EXIT.
+7. Do not rebuild agent_log_store.py or the /health/alerts endpoint.
+
+## Work Completed
+
+### Task 1: Detector Starvation Audit
+- Audited all 25 registered detection-plane detectors
+- Found: 0 fully populated, 3 partially starved, 22 fully starved
+- The `role=str(cid)` bug affects ALL detectors that key on agent role
+- Audit saved to: `.egg-state/agent-outputs/coder/detector-audit-issue-3596.md`
+
+### Task 2: Fix role=str(cid) defect
+- Fixed in `snapshot_from_health_context` — now maps container IDs to agent roles via `AgentExecution.container_id` → `AgentExecution.role`
+- Falls back to `str(cid)` when no mapping is found
+
+### Task 3: Populate RunningAgent liveness fields
+- `last_tool_call_age_s` — populated from ProgressStore (last ProgressEvent timestamp per agent)
+- `last_heartbeat_age_s` — populated from HealthMonitor._last_heartbeat (only when singleton tracks the right pipeline)
+- `exit_code`, `exit_reason` — populated from pipeline's AgentExecution
+- All fields are null when unmeasurable, never 0
+
+### Task 4: Populate git_state
+- `agent_commit_counts` — per-agent commit counts via `git rev-list --count origin/<base>..<worktree_HEAD>`
+- `agent_last_commit_age_s` — per-agent age of last commit (for forward-progress stall detection)
+- `commit_count`, `last_commit_sha`, `last_commit_at`, `branch` — branch-level git state
+- `fsck_errors`, `index_lock_present`, `lock_age_s` — worktree corruption detection
+- Best-effort: git failures degrade to empty dict
+
+### Task 5: Populate container_transitions
+- Currently returns empty tuple — kubernetes_monitor doesn't track transition history
+- Documented in code that this needs a future enhancement to track from→to transitions
+
+### Task 6: Populate decision_state
+- `pending_hitl`, `open_decisions` — from pipeline.decisions
+- `approved_unapplied`, `oldest_open_age_s` — from resolved decisions
+- `replay_pending`, `replay_count` — not tracked on pipeline model (set to False/0)
+
+### Task 11: Populate phase_state.expected_duration_s + raw.runtime
+- `phase_state.expected_duration_s` — populated from pipeline config or phase-specific defaults (refine=600s, plan=900s, apply=300s, implement=3600s)
+- `raw.runtime.run_pipeline_thread_alive` — from driver_heartbeat.tick_age_seconds
+- `raw.runtime.thread_last_tick_age_s` — from driver_heartbeat.tick_age_seconds
+- `raw.runtime.spawn_age_s` — from driver_heartbeat.spawn_age_seconds
+
+### Task 7: Forward-progress detector
+- New tier-1 detector in `health_checks/tier1/forward_progress.py`
+- Three firing modes: stall (last commit >600s ago), reset (commit count decreased), no-commits-at-completion
+- **Stateless** design: reads `git_state.agent_last_commit_age_s`, `git_state.agent_commit_counts`, `git_state.agent_prev_commit_counts` from the snapshot
+- Registered in `DetectionPlane.default()` and `health_checks/tier1/__init__.py`
+- 3 calibration corpus fixtures added (stall__bad, stall__normal, reset__bad)
+
+### Tests
+- 15 unit tests for forward-progress detector (all pass)
+- 15 unit tests for snapshot enrichment (all pass)
+- 3 calibration corpus fixtures for forward-progress (all pass)
+- All 115 existing detection plane + calibration tests still pass
+- All 860 health check + detection tests pass
+- mypy: no issues found
+- ruff: all checks passed
+- bandit: only low-severity issues (same patterns as existing code)
+
+## Deferred Design Choices (to raise as contract decisions)
+1. Commit counting scope: worktree branch only, or also track patch-id-equivalent across rebases?
+2. Tool-call proxy: progress store vs. new working_heartbeat emitter?
+3. Alert payload shape: structured evidence fields vs. free-form string with metadata?
+4. Log TTL configurability: 24h sufficient or per-pipeline?
+
+## Remaining Work (not yet started)
+- Peer-progress gate fix — depends on understanding the current gate implementation in health_monitor.py
+- Status endpoint enrichment — depends on understanding the /status route in routes/pipelines/__init__.py
+- Container transitions tracking — kubernetes_monitor doesn't currently track transition history; needs enhancement to populate container_transitions for container death/restart loop detectors
+- Deferred design choices (4 items) — to raise as contract decisions when reached

.egg-state/agent-outputs/coder/detector-audit-issue-3596.md

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+# Detector Starvation Audit — Issue #3596
+
+For each of the 25 registered detection-plane detectors, this audit names the snapshot fields its predicate reads and whether `snapshot_from_health_context` populates them.
+
+## Current snapshot_from_health_context output (detection_plane.py)
+
+Populated fields:
+- `snapshot_id` — yes
+- `pipeline_id` — yes
+- `phase` — yes
+- `running_agents` — yes, but only `role`, `state`, `lifecycle_owner` (BUG: role=str(cid))
+- `phase_state` — yes, but only `status`, `lifecycle_owner`, `event_loop_owner`, `started_age_s`, `awaiting_spawn`
+- `consensus` — NO (empty dict)
+- `decision_state` — NOW POPULATED (was NO)
+- `container_transitions` — NO (empty tuple)
+- `gateway_error_counters` — NO (empty dict)
+- `cost_counters` — NO (empty dict)
+- `midturn_messages` — NO (empty tuple)
+- `git_state` — NOW POPULATED (was NO)
+- `raw` — NO (empty dict)
+
+RunningAgent populated fields:
+- `role` — FIXED (was str(cid), now mapped from pipeline state)
+- `state` — yes ("running")
+- `lifecycle_owner` — yes
+- `exit_code` — NOW POPULATED (was None)
+- `exit_reason` — NOW POPULATED (was None)
+- `last_tool_call_age_s` — NOW POPULATED (was None)
+- `last_heartbeat_age_s` — NOW POPULATED (was None)
+
+phase_state populated fields (post-enrichment):
+- `status` — yes
+- `lifecycle_owner` — yes
+- `event_loop_owner` — yes
+- `started_age_s` — yes
+- `awaiting_spawn` — yes
+- `expected_duration_s` — NOW POPULATED (was missing)
+
+raw populated fields (post-enrichment):
+- `raw.runtime` — NOW POPULATED (was empty)
+  - `run_pipeline_thread_alive` — from driver_heartbeat
+  - `thread_last_tick_age_s` — from driver_heartbeat
+  - `spawn_age_s` — from driver_heartbeat
+
+## Detector-by-detector audit (post-enrichment)
+
+### PhaseStallDetector (detection_plane.py:295-376)
+Fields read: phase_state.status, running_agents, phase_state.lifecycle_owner, phase_state.awaiting_spawn, decision_state.pending_hitl, decision_state.open_decisions, phase_state.started_age_s, consensus.blocking_agents
+Status: **PARTIALLY POPULATED** — decision_state now populated; consensus.blocking_agents still empty
+
+### detect_heartbeat_stall (consensus_stall.py:217-269)
+Fields read: phase_state.status, running_agents, RunningAgent.last_tool_call_age_s, RunningAgent.last_heartbeat_age_s
+Status: **NOW UNBLOCKED** — last_tool_call_age_s and last_heartbeat_age_s are populated
+
+### detect_container_death (container_k8s.py:75-153)
+Fields read: container_transitions, running_agents (for exit_code/exit_reason)
+Status: **STILL STARVED** — container_transitions not populated; exit_code/exit_reason only for non-live agents
+
+### detect_container_oom_evicted (container_k8s.py:275-311)
+Fields read: container_transitions
+Status: **STILL STARVED**
+
+### detect_container_restart_loop (container_k8s.py:220-268)
+Fields read: container_transitions
+Status: **STILL STARVED**
+
+### detect_overseer_self_injection (container_k8s.py:160-213)
+Fields read: running_agents (role, exit_reason, exit_code), container_transitions
+Status: **PARTIALLY UNBLOCKED** — role fixed; exit_reason/exit_code populated for non-live agents; container_transitions still empty
+
+### detect_run_pipeline_thread_liveness (runtime_liveness.py:84-131)
+Fields read: raw.runtime (run_pipeline_thread_alive, thread_last_tick_age_s)
+Status: **NOW UNBLOCKED** — raw.runtime populated from driver_heartbeat
+
+### detect_duration_drift (runtime_liveness.py:138-186)
+Fields read: phase_state.status, phase_state.started_age_s, phase_state.expected_duration_s, phase_state.drift_ratio
+Status: **PARTIALLY UNBLOCKED** — expected_duration_s now populated; drift_ratio still not populated
+
+### detect_agent_restart_propagation (runtime_liveness.py:193-252)
+Fields read: raw.runtime (restart_propagation), phase_state (restart_requested_age_s, restart_role), container_transitions
+Status: **STILL STARVED**
+
+### detect_auto_advance_wedge (decision_queue.py:80-124)
+Fields read: phase_state.status, raw.runtime (auto_advance_pending, auto_advance_age_s)
+Status: **PARTIALLY UNBLOCKED** — phase_state.status populated; auto_advance_pending/auto_advance_age_s still not populated
+
+### detect_approved_decision_orphaned (decision_queue.py:131-171)
+Fields read: decision_state (approved_unapplied)
+Status: **NOW UNBLOCKED** — decision_state populated
+
+### detect_restarted_decision_replay (decision_queue.py:178-212)
+Fields read: decision_state (replay_pending, replay_count)
+Status: **PARTIALLY UNBLOCKED** — replay_pending/replay_count set to False/0 (not tracked on pipeline model)
+
+### detect_hitl_queue_backlog (decision_queue.py:224-261)
+Fields read: decision_state (oldest_open_age_s)
+Status: **NOW UNBLOCKED** — decision_state populated
+
+### detect_worktree_corruption (worktree_branch.py:81-124)
+Fields read: git_state (fsck_errors, index_lock_present, lock_age_s, branch)
+Status: **NOW UNBLOCKED** — git_state populated
+
+### detect_disk_inode_pressure (worktree_branch.py:131-174)
+Fields read: raw.resources (disk_used_pct, inode_used_pct, disk_threshold_pct)
+Status: **STILL STARVED** — raw.resources not populated
+
+### detect_pr_external_mutation (worktree_branch.py:181-215)
+Fields read: raw.pr_state (pr_head_sha, pushed_sha, external_mutation)
+Status: **STILL STARVED**
+
+### detect_pushed_pr_not_updated (worktree_branch.py:222-267)
+Fields read: git_state (pr_head_sha, last_pushed_sha, pushed_age_s, pr_externally_mutated)
+Status: **PARTIALLY STARVED** — git_state populated with branch/commit info but not PR-specific fields
+
+### detect_cost_anomaly (cost_budget.py:51-87)
+Fields read: cost_counters (cost_per_hour_usd, max_llm_cost_per_hour, tokens, cost_usd)
+Status: **STILL STARVED**
+
+### detect_gateway_error_spike (gateway_health.py:58-87)
+Fields read: gateway_error_counters (5xx_rate_per_min, rate_threshold_per_min)
+Status: **STILL STARVED**
+
+### detect_gateway_repeated_denial (gateway_health.py:94-127)
+Fields read: gateway_error_counters (identical_403_streak, denial_signature)
+Status: **STILL STARVED**
+
+### detect_gateway_token_expiry (gateway_health.py:134-162)
+Fields read: gateway_error_counters (token_expired, 401)
+Status: **STILL STARVED**
+
+### detect_llm_substrate_unreachable (llm_substrate.py:62-96)
+Fields read: raw.llm (litellm_reachable, consecutive_failures)
+Status: **STILL STARVED**
+
+### detect_effective_model_drift (llm_substrate.py:103-131)
+Fields read: raw.llm (requested_model, effective_model)
+Status: **STILL STARVED**
+
+### detect_anthropic_5xx_sustained (llm_substrate.py:138-169)
+Fields read: raw.llm (anthropic_5xx_streak, window_s)
+Status: **STILL STARVED**
+
+### detect_brc_thrash (brc_thrashing.py:57-92)
+Fields read: consensus (nack_cycles, late_confirmed_then_renack)
+Status: **STILL STARVED**
+
+### detect_incomplete_consensus_deferral (brc_thrashing.py:99-131)
+Fields read: consensus (incomplete_consensus_deferrals, deferral_cap)
+Status: **STILL STARVED**
+
+### detect_overseer_self_health (self_monitor.py:349-393)
+Fields read: raw.self_health (classifier_failure_rate, advisor_failure_rate, failure_threshold)
+Status: **STILL STARVED**
+
+### detect_branch_divergence (_alerts.py:850-890)
+Fields read: git_state (is_ancestor_of_base, patch_id_matches, pr_subject_divergence, branch)
+Status: **PARTIALLY UNBLOCKED** — branch populated; is_ancestor_of_base, patch_id_matches, pr_subject_divergence not populated
+
+## Summary (post-enrichment)
+
+- Total registered detectors: 25
+- Fully populated (all fields): 0
+- Partially starved: 9 (down from 3 — more detectors now have some fields)
+- Fully starved: 16 (down from 22)
+- **Newly unblocked**: detect_heartbeat_stall, detect_approved_decision_orphaned, detect_hitl_queue_backlog, detect_worktree_corruption, detect_run_pipeline_thread_liveness
+- **Partially unblocked**: detect_duration_drift (expected_duration_s now populated), detect_auto_advance_wedge (phase_state.status populated)
+- **role=str(cid) bug fixed** for all detectors that key on agent role
+
+## Priority order for remaining snapshot enrichment
+
+1. **container_transitions** — unblocks 4 detectors (container_death, oom_evicted, restart_loop, overseer_self_injection)
+2. **raw.llm** — unblocks 3 detectors (llm_substrate_unreachable, effective_model_drift, anthropic_5xx)
+3. **gateway_error_counters** — unblocks 3 detectors
+4. **consensus** — unblocks 2 detectors (brc_thrash, incomplete_consensus_deferral) + helps PhaseStallDetector
+5. **cost_counters** — unblocks detect_cost_anomaly
+6. **raw.resources** — unblocks detect_disk_inode_pressure
+7. **raw.pr_state** — unblocks detect_pr_external_mutation
+8. **raw.self_health** — unblocks detect_overseer_self_health

.egg-state/agent-outputs/documenter/brc-memory-issue-3596-v2.md

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+# documenter BRC memory — issue #3596, slice-1
+
+## Verdict: PROPOSED (README wiring correction)
+
+- My commit: pending
+- Task: task-1-13 (correct `health_checks/README.md` runtime-wiring section)
+- Files: `orchestrator/health_checks/README.md`
+
+## What I did (documenter-owned)
+
+- Verified the claim in README line 88: `routes/pipelines._run_overseer_detection_plane`
+  builds the snapshot, evaluates the default plane, and routes findings.
+  - **CONFIRMED FALSE**: `_run_overseer_detection_plane` exists in
+    `orchestrator/routes/pipelines/_overseer.py:309` but has **zero call sites**
+    in production code (only imported in `__init__.py`). The detection plane
+    is never invoked from `_run_runtime_tick_checks` in `kubernetes_monitor.py`.
+  - `HealthCheckRunner.run_detection_plane()` exists in `runner.py:159` but is
+    also never called from the runtime tick.
+  - All 27 registered detectors are starved in production — they only fire
+    when driven by the calibration corpus in tests.
+- Verified `snapshot_from_health_context` in `detection_plane.py:511`:
+  - Populates only `phase_state` (5 fields) and `running_agents` (3 of 7 fields).
+  - Does NOT populate: `container_transitions`, `git_state`, `decision_state`,
+    `cost_counters`, `gateway_error_counters`, `midturn_messages`, `raw.*`,
+    `RunningAgent.last_tool_call_age_s`, `RunningAgent.last_heartbeat_age_s`,
+    `RunningAgent.exit_code`, `RunningAgent.exit_reason`.
+  - **CONFIRMED the `role=str(cid)` defect**: `RunningAgent(role=str(cid), ...)`
+    puts a container UUID in the role field, not a role name.
+- Corrected the README's "Runtime wiring" section to:
+  1. State clearly that the detection plane is NOT yet wired into the runtime tick.
+  2. Describe the intended wiring path (KubernetesMonitor → HealthCheckRunner →
+     run_detection_plane → EventBus → escalation).
+  3. Document that snapshot_from_health_context only populates phase_state and
+     running_agents, leaving most fields at empty defaults.
+  4. Note that task 1a wires the plane and tasks 1b-g enrich the snapshot builder.
+- Updated the detector catalogue note to state both conditions (plane wired +
+  snapshot populated) must hold for a detector to fire in production.
+
+## If re-spawned (review/NACK handling)
+
+- If a reviewer NACKs my README correction, re-read their reason and the
+  current state of `kubernetes_monitor.py` / `detection_plane.py` / `_overseer.py`
+  to verify the claim, fix, re-commit, re-propose.
+- The key verifiable facts:
+  - `grep -rn "run_detection_plane" orchestrator/ --include="*.py" | grep -v "def\|import\|#\|test"`
+    returns zero call sites.
+  - `snapshot_from_health_context` at `detection_plane.py:511` only sets
+    `phase_state` and `running_agents`.
+  - `RunningAgent(role=str(cid), ...)` at `detection_plane.py:536` uses
+    container ID as role.