Distillation

Date: Sep 17, 2026

• 🟡 (01:37) User supplied a patch excerpt adding optional durable event metadata with exact shape readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number } in generated/public type surfaces.
• 🟡 (01:37) The patch excerpt adds Session recovery database artifacts, including a session_recovery table, assistant_message_id, wake_attempts, and wake_pending; migration SQL defines wake_pending as integer DEFAULT true NOT NULL.
• 🟡 (01:37) The patch excerpt adds the database index session_execution_recovery_scan_idx.
• 🟡 (01:37) The patch excerpt changes LLM execution to invoke if (input.beforeStream) yield* input.beforeStream() immediately before streaming.
• 🟡 (01:37) The patch excerpt refactors Session Context Epoch preparation to prepareOnce(db, events, context, sessionID, claim).pipe(Effect.withSpan("SessionContextEpoch.prepare")), replacing portions of the prior direct advancement/update flow.
• 🟡 (01:37) The patch excerpt adds import { EventV2 } from "../../event" in Session recovery-related implementation code.