fix(agent-runtime): require JSON media type for current workflow evidence - #704
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📝 WalkthroughWalkthrough워크플로 상태 응답에 JSON 콘텐츠 유형 검증을 추가했습니다. 허용되지 않은 Changes응답 콘텐츠 유형 검증
Priority: ⬇️ Low Estimated code review effort: 2 (Simple) | ~10 minutes Change: Bug fix Merge Risk: 🔵 Low · up to Repeated invalid media-type responses may retain connection or stream resources. The localized cleanup fix should be applied before merge or explicitly accepted. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
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Inline comments:
In `@src/agent-runtime/procedural-current-lifecycle.ts`:
- Around line 225-227: Update the invalid-content-type branch in
readCurrentWorkflowEvidence to best-effort cancel response.body before calling
rejectCurrentLifecycle, ignoring both synchronous exceptions and rejected
cancellation promises; preserve the existing lifecycle rejection and add a
regression test verifying the body cancellation path.
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📒 Files selected for processing (2)
src/agent-runtime/procedural-current-lifecycle.tstest/procedural-current-lifecycle-response-bounds.test.ts
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Exact-head review for 42b15e865bdf88fde622c3bba2c0b123770d18be: verified the owner contract still emits application/json; charset=utf-8; the media-type gate remains within Agent Runtime admission and does not import Workflow / Task lifecycle truth. Re-verified the earlier resource-lifecycle finding: unsupported media types request best-effort body cancellation while synchronous throw, asynchronous rejection, null body, and non-settling cleanup cannot replace or delay the stable invalid_workflow_state_response decision. Application CI 34740557468, reviewer-ci 34740557524, Security Scan 34740557461, and patch-validator-image 34740557472 are terminal success on this exact head; the prior coverage RED was repaired only by hostile edge tests. No unresolved review thread remains. This is a COMMENT review, not self-approval.
1 participant
Problem
Agent Runtime admitted a
200Workflow / Task Execution response as current lifecycle authority after bounded byte/UTF-8/JSON parsing without first requiring the private durable owner’s declared JSON media type. Parseable JSON delivered astext/plaincould therefore enter the authority path even though the owner emitsapplication/json; charset=utf-8.RED-first lineage
Test-only exact
57259205eec4e420dca65e87c8fb3c9c92268065introduced the hostile regression before the repair: parseable workflow-state JSON identified astext/plain; charset=utf-8must fail closed with the stableinvalid_workflow_state_responsediagnostic. Its hosted runs were cancelled when the shared PR branch advanced, so they are retained as test-first history but are not claimed as completed hosted RED evidence.Repair and review findings
The Agent Runtime now accepts only the exact JSON media-type forms emitted by the private Workflow / Task Execution owner and rejects mismatches before body parsing. Review of the first repair identified a resource-lifecycle gap: rejecting a non-JSON response without consuming or cancelling its stream could retain transport resources. The repair therefore requests body cancellation as best-effort cleanup and never waits for cancellation completion before returning the stable fail-closed decision. The hostile regression proves both rejection and cleanup-liveness semantics.
A second verification pass found test-fixture drift exposed by the new admission boundary: fail-closed evidence fixtures and the stalled-read response mock did not consistently identify successful owner responses as JSON, even though the real Durable Object owner does. Those fixtures now use the owner’s JSON media type so locked-body, no-body, malformed-envelope, malformed-chunk, read-failure and absolute read-deadline branches remain genuinely exercised rather than short-circuiting at the new media gate.
Production and focused test-helper documentation was added after the diff-scoped docstring warning. CodeRabbit's actionable resource-lifecycle finding is resolved; later review-capacity/rate-limit notices are not treated as approval.
Exact-head verification RCA
Exact
13203351fac18324aace66f37a1b1b55577e602bpassed all 708 test files / 4,777 tests but correctly failed application CI run34740033187because the repository's 100% coverage gate exposed previously unexecuted branches introduced by the repair: missing media type / null-body cleanup and synchronous cancellation failure. This was a real CI finding, not a flake. Test-only commitsda169126ae35c209ba52e614c63faedf51c3b9bcand42b15e865bdf88fde622c3bba2c0b123770d18beadd hostile cases for null-body cleanup, synchronous cancellation throw, and asynchronous cancellation rejection without changing production semantics.The current exact head is
42b15e865bdf88fde622c3bba2c0b123770d18be. Its application CI, reviewer-ci, Security Scan and patch-validator-image are the only merge evidence for this head and must all be terminal GREEN before merge; older-head GREEN runs are not merge authority.This remains a narrow Agent Runtime response-admission repair. Workflow / Task lifecycle truth stays with its Durable Object owner. Provider/model routing, destination/outbound authority, credentials, quarantine/security authority, Policy / Approval, State / Checkpoint, release/deployment authority, and foreign product truth do not move into Agent Runtime.