Distillation

Date: Sep 17, 2026

• 🟡 (00:45) Post-fix validation ran tsgo --noEmit and targeted Bun tests in packages/core/test/session-runner.test.ts; SessionRunnerLLM > settles cancellation when Step start notification is interrupted still failed because the query for session.next.step.interrupted.1 returned [] instead of an event with data.assistantMessageID: "msg_0acd377fa001tWy5i25TFPXgIh". Result: 3 pass, 106 filtered out, 1 fail, 14 expect() calls across 1 file in 2.30s.
• 🟡 (00:45) Investigation hypothesis: the adopted durable-assistant path might remove the execution claim without emitting Step.Interrupted, representing either a valid direct-settlement path or a failed event-publication path; proposed diagnostic was to inspect the complete durable event sequence and session.interrupt(sessionID) exit before changing implementation.
• 🟡 (00:46) packages/core/test/session-runner.test.ts was instrumented to print the complete durable event sequence, execution claim, and interrupt exit.
• 🟡 (00:46) Diagnostics showed only 4 durable events: 1. session.next.prompt.admitted.1, 2. session.next.prompt.execution_requested.1, 3. session.next.prompted.1, 4. session.next.step.started.1; no session.next.step.interrupted.1 event was published.
• 🟡 (00:46) Contrary to the preceding claim-removal hypothesis, the execution claim remained present with id: "b671f09e-0232-48b0-9211-8803a2018b64", session_id: "ses_runner_test", owner_id: "ea790626-a0d0-4053-8e2e-54a8abcb2737", assistant_message_id: "msg_0acd3f3500015IsdUOYtRAk9KF", phase: "cancelling", assistant_seq: 3, time_created: 0, expires_at: 30000, and recovery_error: null.
• 🟡 (00:46) The diagnostic run’s session.interrupt(sessionID) exit was an Effect Failure; the targeted test result was 0 pass, 109 filtered out, 1 fail, 3 expect() calls across 1 file in 1.63s.
• 🟡 (00:46) Debugging conclusion was refined: the runner never publishes the interruption, the interrupt exit carries the root cause, and the durable claim remains in phase: "cancelling"; the next diagnostic would pretty-print that cause once and then remove the instrumentation.
• 🟡 (00:46) A subsequent diagnostic reproduced the same 4-event sequence and showed another retained execution claim with id: "840cfe12-6dad-46b4-84c8-711d54a5dc71", session_id: "ses_runner_test", owner_id: "99838f67-e212-4f2a-8ee0-3ed657083671", assistant_message_id: "msg_0acd44a21001BJ2duUuA4dpdCZ", phase: "cancelling", assistant_seq: 3, time_created: 0, expires_at: 30000, and recovery_error: null.
• 🟡 (00:46) Pretty-printing the interrupt exit exposed only the coordinator-level error Interrupted Session settlement failed: ses_runner_test, while the assertion still found no session.next.step.interrupted.1 event. Result: 0 pass, 109 filtered out, 1 fail, 3 expect() calls across 1 file.
• 🟡 (00:46) Investigation refinement: the visible Interrupted Session settlement failed: ses_runner_test error comes from coordinator cleanup and masks an earlier runner settlement defect; packages/core/test/session-runner.test.ts was updated again to capture the runner cause separately and identify the exact publisher operation preventing Step.Interrupted. No subsequent diagnostic result was reported.