Distillation

Date: Sep 15, 2026

• 🟡 (01:39) Patch excerpt for packages/core/src/session/execution/local.ts showed database-backed session execution leasing: obtains db via Database.Service, creates or retrieves execution records using executionID, and repeatedly calls renew(executionID) with Effect.repeat(Schedule.spaced("10 seconds")).
• 🟡 (01:39) Patch excerpt for packages/core/src/session/runner/llm.ts added execution-claim enforcement that dies with the exact defect message Session execution claim lost: ${executionID} when a claim is absent.
• 🟡 (01:39) Patch excerpt for packages/core/src/session/runner/llm.ts added execution phase updates including updateExecution({ phase: "unknown" }).
• 🟡 (01:39) Patch excerpt for packages/core/src/session/runner/llm.ts added overflow recovery through runAfterOverflowCompaction(sessionID, executionID, undefined, defect.transition.step).
• 🟡 (01:39) Patch excerpt for packages/core/src/session/message-updater.ts expanded update(adapter: Adapter, event: SessionEvent.Event) with new message-appending behavior via adapter.appendMessage(...).
• 🟡 (01:39) Patch excerpt for packages/core/src/session/projector.ts showed event projection involving SessionEvent.Step.Started and validation that a retrieved message has assistant.type === "assistant".
• 🟡 (01:39) Patch excerpt for packages/core/src/session/recovery.ts imported SessionExecution, queried SessionMessageTable by session_id and type = "assistant", referenced claim.assistant_message_id, published SessionEvent.Step.Recovered, and matched SessionRecoveryTable.execution_id to claim.id.
• 🟡 (01:39) Patch excerpt for packages/core/src/session/runner/publish-llm-event.ts added handling keyed on definition.durable !== undefined, event publication via publishEvent(...), and generated event timestamps using timestamp: yield* timestamp.
• 🟡 (01:39) Patch excerpt showed durable-tool publication logic retaining per-call tool tracking through for (const [callID, tool] of tools), text accumulation through text.append(event.id, event.text), and settlement state via tool.settled = true.
• 🟡 (01:39) Patch excerpt for packages/core/src/session/sql.ts added unique index session_recovery_execution_idx on table.execution_id.
• 🟡 (01:39) Patch excerpt for packages/core/src/session/sql.ts added index session_execution_owner_idx on table.owner_id.