The TurnRuntime per turn-runtime-design.md: constructor-injected,
container-ignorant, no per-turn state — every advanceTurn reconstructs
from the JSONL log, so normal execution and crash recovery share one
path.
- runtime.ts: createTurn/advanceTurn/getTurn; durable-barrier appends
before side effects; sequential sync tools with progress; async tool
exposure + durable suspension; permission pipeline (checker →
optional classifier batch → human/deny fallback, fail-closed on
checker errors); cancellation with synthetic results; recovery that
re-issues interrupted model calls and continues after interrupted
sync tools; model-call-limit exhaustion with machine-readable code.
- fs-repo.ts: date-partitioned append-only JSONL, strict line
validation, path-traversal rejection, per-turn in-process locking.
- stream.ts: hot execution stream — buffers before the consumer
attaches, outcome independent of consumption, close-drops-events.
- context-resolver.ts: chain-walking materialization of context
references with cycle detection.
- Seam interfaces for stage-4 bridges: model/tool registries,
permission checker/classifier, agent resolver, lifecycle bus, clock.
- shared reducer: track classification failures durably so failed
classifications are never re-run.
67 new tests: all nine §26 end-to-end scenarios (mocked deps,
recovery boundaries seeded directly) plus repo/stream/resolver suites.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Durable contracts for the new turn/session runtime, shared by core and
renderer:
- turns.ts: zod schemas for all 16 durable turn events, TurnContext
(previousTurnId ref | inline messages), ModelRequest with contextRef
and current-turn-only messages, ephemeral delta types, reduceTurn
enforcing every spec invariant, and pure derivations
(deriveTurnStatus, turnTranscript, outstanding work).
- sessions.ts: session_created/turn_appended/title_changed schemas,
reduceSession, and the SessionIndexEntry projection.
- vitest wiring for packages/shared (config, build-excluded tests);
92 tests covering happy paths, recovery-shaped histories, and one
named test per corruption invariant.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
