Distillation

Date: Sep 15, 2026

• 🟡 (08:01) Inspection of /home/byk/Code/opencode/packages/core/src/session/runner/llm.ts:95-164 showed the layer initializes EventV2.Service, LLMClient.Service, AgentV2.Service, ToolRegistry.Service, SessionRunnerModel.Service, SessionStore.Service, Location.Service, SystemContextRegistry.Service, SkillGuidance.Service, ReferenceGuidance.Service, Config.Service, Snapshot.Service, and Database.Service; it creates compaction with SessionCompaction.make({ events, llm, config: yield* config.entries() }).
• 🟡 (08:01) getSession in /home/byk/Code/opencode/packages/core/src/session/runner/llm.ts:112-116 calls store.get(sessionID) and dies with Session not found: ${sessionID} when no session exists; getContext at lines 118-120 delegates to store.context(sessionID).
• 🟡 (08:01) failInterruptedTools in /home/byk/Code/opencode/packages/core/src/session/runner/llm.ts:121-141 scans assistant messages from getContext(sessionID) and publishes SessionEvent.Tool.Failed for tool entries whose status is "pending" or "running". The event includes sessionID, DateTime.now, assistantMessageID, callID, error { type: "unknown", message: "Tool execution interrupted" }, provider.executed normalized to a boolean, and optional provider.metadata.
• 🟡 (08:01) /home/byk/Code/opencode/packages/core/src/session/runner/llm.ts:143-144 defines awaitToolFibers as Effect.raceFirst(FiberSet.join(fibers), FiberSet.awaitEmpty(fibers)).
• 🟡 (08:01) /home/byk/Code/opencode/packages/core/src/session/runner/llm.ts:146-152 documents that, matching V1, declining a user prompt halts the loop rather than becoming model-facing tool output. isUserDeclined detects a die reason whose defect is PermissionV2.DeclinedError or QuestionV2.RejectedError.
• 🟡 (08:01) /home/byk/Code/opencode/packages/core/src/session/runner/llm.ts:154-163 defines TurnTransition variants { readonly _tag: "ContinueAfterCompaction"; readonly step: number } and { readonly _tag: "ContinueAfterOverflowCompaction"; readonly step: number }; TurnTransitionError extends Error and stores a readonly transition.
• 🟡 (08:03) Search found 9 Compaction-related matches in /home/byk/Code/opencode/packages/schema/src/session-event.ts: namespace Compaction at line 423; event types "session.next.compaction.started" at line 425, "session.next.compaction.delta" at line 436, and "session.next.compaction.ended" at line 446; registrations/references to Compaction.Started and Compaction.Ended at lines 499-500, plus Compaction.Started, Compaction.Delta, and Compaction.Ended at lines 535-537.