Distillation

Date: Sep 17, 2026

• 🔴 [requested-agent-resumption] (08:18) User stated the server restarted and directed the assistant to nudge any background agents so they resume.
• 🟡 (08:18) Assistant stated correctness review had finished with v19 rejected and resumed the potentially interrupted security reviewer as background task ses_f52fef029ffe2a2CGDN98jGF2v, while continuing the post-finalizer cancellation fix and regressions locally.
• 🔴 (08:19) User asserted the recovery contract: “never recovers an expired cancellation claim.”
• 🔴 (08:19) User asserted the recovery contract: “never quarantines cancellation after recovery ownership expires.”
• 🟡 (08:19) Recovery-test contract was refined in packages/core/test/session-projector.test.ts: expired cancelling claims remain quarantined with recovery_error: "Cancellation outcome unknown after owner loss", no wake, no SessionRecoveryTable row, and no SessionInputTable row; expired cancelled claims are treated separately and cleared as a known durable outcome.
• 🟡 (08:19) Updated packages/core/test/session-runner.test.ts and packages/core/test/session-projector.test.ts to replace the rejected interrupted-finalizer ordering and add distinct startup cases for expired cancelling versus expired cancelled.
• 🟡 (08:20) Focused validation passed: Core tsgo --noEmit; one runner test passed with 109 filtered and 6 assertions; two projector tests passed with 55 filtered and 8 assertions.
• 🟡 (08:20) Explicit durable-Step-start interruption regression settles cancellation when Step start notification is interrupted in packages/core/test/session-runner.test.ts:4001 passed: 1 pass, 109 filtered, 0 failures, 6 assertions.
• 🟡 (08:20) Confirmed cancellation edge contracts: interruption after loss of a durable Step.Started notification settles in coordinator cleanup; a blocked outer finalizer prevents any durable interruption until it joins; immediate claim renewals guard both snapshot writes.
• 🟡 (08:21) Broader recovery gate exposed stale tests after removing runner-owned settlement. Four direct-SessionRunner tests bypassed SessionExecutionLocal, so they incorrectly expected a durable Step.Interrupted and terminal projection instead of retaining phase unknown for startup reconciliation.
• 🟡 (08:21) Production cancellation regression also expected the old tool error Tool execution outcome unknown after interruption; post-join coordinator cleanup now emits canonical error Tool execution interrupted.
• 🟡 (08:21) Test-contract decision: direct runner interruption must leave the execution claim in phase unknown, publish no durable SessionEvent.Step.Interrupted, and avoid a falsely terminal projection; production SessionExecution.interrupt must still reconcile tools and Step after finalizers join.
• 🟡 (08:21) In verifyPartialFlushOnInterruption() at packages/core/test/session-runner.test.ts:572-616, the stale assertion at lines 598-602 expected a SessionEvent.Step.Interrupted; it was changed to expect no such event when the direct runner is interrupted without coordinator cleanup.
• 🟡 (08:21) The production test durably fails blocked local tools when a provider turn is interrupted at packages/core/test/session-runner.test.ts:3845 was updated to use the coordinator-settled interruption semantics rather than the prior Provider Step outcome unknown after interruption / Tool execution outcome unknown after interruption expectations.
• 🟡 (08:21) The direct-runner test durably fails blocked local tools when interrupted while awaiting settlement at packages/core/test/session-runner.test.ts:4143 was changed to assert nonterminal durable state rather than fabricated interruption settlement.
• 🟡 (08:22) A rerun showed four partial-fragment cases still had stale terminal-shape expectations: text and reasoning fragments projected empty text rather than "Partial", and tool input remained pending rather than becoming an error. The assistant concluded that ephemeral live deltas were never durably projected.
• 🟡 (08:22) Replaced partial-fragment terminal-shape matching with mutation-sensitive durable checks: execution remains unknown, no Step.Interrupted exists, and partial live deltas are absent from durable projection.
• 🟡 (08:23) The revised assertion initially failed Core typecheck at packages/core/test/session-runner.test.ts:608 because Message does not always have content, and at line 611 because a spread operand was not known to be an object. The test was corrected using the fragment types and fixtures defined around lines 427-511.
• 🟡 (08:24) Focused post-fix validation passed: Core tsgo --noEmit; 5 affected runner tests passed, 105 filtered, 0 failed, with 28 assertions in 1.58 seconds.
• 🟡 (08:24) Complete recovery gate passed: 251 tests across 8 files, 0 failures, 760 assertions, completed in 20.03 seconds.
• 🟡 (08:24) Assistant launched revised full validation as background task ses_f51883971ffev3uclQPbWE9FKR: full Core suite plus six package typechecks, followed if green by SEA rebuild, isolated v18 smoke, candidate freeze, and replacement correctness/security reviews.