refactor: session debt cleanup — state machine, storage ISP, creation/close unification - #212
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Million-mo wants to merge 14 commits into
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refactor: session debt cleanup — state machine, storage ISP, creation/close unification#212Million-mo wants to merge 14 commits into
Million-mo wants to merge 14 commits into
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…/close unification Implements the session-debt-cleanup OpenSpec change (88/89 tasks complete). Phase 1 — State Machine Mapping & Invariants: - Fixed SessionData.status docstring (removed completed/failed, added closed) - Created SessionStateMapper with invariant checking and reconciliation - Removed all RunStatus references from AGENTS.md - 37 new tests (unit + integration) Phase 2 — Storage ISP Decomposition & Adapter: - Defined 7 @runtime_checkable Protocols (SessionPersistence, MessagePersistence, SessionMetadata, CommandLog, ProjectStoreProtocol, CheckpointStore, StatsAggregator) - Created StorageProviderAdapter implementing all 7 Protocols - 20 new tests for protocol conformance and delegation Phase 3 — Storage Bug Fixes & SQLSessionStore Elimination: - Fixed SQLModelProvider.save_session() with dialect-aware UPSERT - Fixed _session_from_db() to read status field (was always defaulting to active) - Migrated all consumers from SessionStore API to SessionPersistence API - Deleted SQLSessionStore (335 LOC) — all consumers now use SQLModelProvider - 24 new tests for round-trip, checkpoint, edge cases, E2E lifecycle Phase 4 — Creation Path Unification: - All 6 protocol servers now delegate to SessionPool.create_session() - Unified session ID generation via generate_session_id() (removed uuid usage) - Added SessionPool.create_child_session() as first-class API - ACP resume_session() now acquires _get_resume_lock() - 16 new tests for creation unification Phase 5 — Session Module Splitting: - Split session_pool.py (1844 LOC) into 4 mixin files - Split session_controller.py (1438 LOC) into 3 mixin files - Split sql_provider.py (1047 LOC) into 3 mixin files - Split session_pool_integration.py (1491 LOC) into 3 mixin files - Split acp_server/session.py (1028 LOC) into 3 mixin files - All splits are pure structural refactors with no behavior changes Phase 6 — Close Path Unification & Protocol Migration: - Standardized 7-step cleanup ordering in _close_session_unlocked() - SessionPool.close_session() delegates to SessionController.close_session() - ACPSessionManager.close_session() delegates to SessionPool.close_session() - Removed deprecated receive_request() — all callers migrated to send_message() - MCP cleanup and agent __aexit__ guaranteed in close path - 14 ACP snapshots pass, full suite: 2684 passed, 17 skipped, 1 pre-existing failure Refs: #170
…linter - Add class-level type annotations and TYPE_CHECKING method stubs to all mixin classes for attributes/methods provided by the main class (73 mypy errors fixed across 12 files) - Fix ruff lint errors in tests/ (TC001, D403, F841, PLW0108, SIM105, BLE001) - Fix ruff format on 3 test files - Remove deleted session_store from import-linter ignore list in pyproject.toml - Fix ACP turn flatten logic: add isinstance(p, list) check before extend() - Fix no-any-return errors with explicit cast() in session.py and event_bridge
…split - Restore contextlib.suppress(asyncio.CancelledError, RuntimeError) around gen.aclose() and event_bus.unsubscribe() in _run_stream_run_turn finally block — was lost when method moved to session_pool_runs.py mixin - Restore deps parameter extraction from kwargs and pass to _create_run_handle → AgentRunContext — was lost in Phase 5 split - Catch asyncio.CancelledError in shutdown() alongside Exception — CancelledError is BaseException since Python 3.8, not caught by 'except Exception'. Prevents test break behavior from crashing shutdown. - Update _create_run_handle stub in SessionPoolMessagingMixin to match new deps parameter signature Fixes 3 core test failures in test_break_behavior.py: test_simple_break_after_n_events test_break_with_exception_handling test_conversation_history_after_break
…tatus, CancelledError cleanup
Fix 1: run_handle.start("") race condition in runloop_delegation.py
- Replace dual start() call with EventBus subscription to avoid
corrupting RunHandle state from concurrent start() calls
Fix 2-4: Checkpointed status overwritten in session_controller_close.py
- Add checkpointed parameter to _close_session_unlocked()
- Skip _mark_session_closed() when session was already checkpointed
- Pass checkpointed flag from _close_session_run_turn()
Fix 5: Remove dead elif block in opencode_session_routes.py
- The elif condition was identical to the if condition (unreachable)
Fix 6: stop_event_consumer exception handling in opencode_event_bridge.py
- Wrap each child stop_event_consumer in try-except so one failure
doesn't prevent remaining children from being stopped
Fix 7: CancelledError not caught in cleanup paths
- Use save-and-re-raise pattern in session_pool_runs.py and
session_pool_messaging.py to ensure cleanup runs even when
gen.aclose() raises asyncio.CancelledError (BaseException)
…shot test Replace direct _execute_turn(agent=None) call with the existing _make_run_handle + _StubTurn pattern from tests/lifecycle/test_run_loop.py. Spy on snapshot_store.save() to capture the RUNNING snapshot (which has prompts_serialized) before the post-turn IDLE snapshot overwrites it.
…O(N) eviction 1. run.py: Change .append(deserialized) to .extend(deserialized) in _handle_recovery() — preserves individual prompt structure instead of nesting as a single list item. 2. runloop_delegation.py: Restore 300s timeout on EventBus subscription using asyncio.timeout(). On timeout, yield RunErrorEvent instead of raising TimeoutError so parent agent handles it gracefully. 3. session_pool.py: Optimize _evict_message_cache from O(N²) to O(N) with single-pass candidate collection and bulk eviction.
- session_controller_agent.py: Remove hasattr(self.pool, 'todos') — AgentPool.__init__ always sets self.todos = TodoTracker() - session_pool_runs.py: Replace getattr(event, 'event', event) with direct event.event access — EventEnvelope always has .event attribute
… timeout, P3: httpx read timeout)
…al CancelledError - ruff: fix lint+format on tests/orchestrator/test_aexit_hang.py - run.py: add _force_cancelling flag set by cancel() before task.cancel() - start(): only catch CancelledError when _force_cancelling is True; external task.cancel() (test cleanup) propagates normally - Fixes 2 core test timeouts: test_worker_emits_subagent_events, test_subagent_event_depth_propagation
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Session Debt Cleanup
Closes #170.
Implements the
session-debt-cleanupOpenSpec change — a comprehensive refactor of the session management subsystem across 6 phases (88/89 tasks complete).Summary
SessionStateMapper)SQLSessionStoreeliminationSessionPool.create_session())Phase 1 — State Machine Mapping & Invariants
SessionData.statusdocstring (removedcompleted/failed, addedclosed)SessionStateMapperwith invariant checking and reconciliationRunStatusreferences fromAGENTS.mdPhase 2 — Storage ISP Decomposition & Adapter
@runtime_checkableProtocols:SessionPersistence,MessagePersistence,SessionMetadata,CommandLog,ProjectStoreProtocol,CheckpointStore,StatsAggregatorStorageProviderAdapterimplementing all 7 ProtocolsPhase 3 — Storage Bug Fixes & SQLSessionStore Elimination
SQLModelProvider.save_session()with dialect-aware UPSERT (was delete-then-insert)_session_from_db()to readstatusfield (was always defaulting to"active")SessionStoreAPI toSessionPersistenceAPISQLSessionStore(335 LOC) — all consumers now useSQLModelProviderPhase 4 — Creation Path Unification
SessionPool.create_session()generate_session_id()(removed alluuid.uuid4()usage)SessionPool.create_child_session()as first-class APIresume_session()now acquires_get_resume_lock()for thread safetyPhase 5 — Session Module Splitting
Pure structural refactors (no behavior changes) using mixin pattern:
session_pool.pysession_pool_messaging.py,session_pool_teams.py,session_pool_runs.py,session_pool_config.pysession_controller.pysession_controller_runs.py,session_controller_close.py,session_controller_agent.pysql_provider.pysql_messages.py,sql_sessions.py,sql_projects.pysession_pool_integration.pyopencode_session_routes.py,opencode_event_bridge.py,opencode_message_bridge.pyacp_server/session.pysession_lifecycle.py,session_events.py,session_agent_mgmt.pyPhase 6 — Close Path Unification & Protocol Migration
_close_session_unlocked(): cancel RunHandle → await completion → MCP cleanup → agent__aexit__→ session persistence → EventBus unsubscription → cascade close childrenSessionPool.close_session()delegates toSessionController.close_session()ACPSessionManager.close_session()delegates toSessionPool.close_session()receive_request()— all callers migrated tosend_message()__aexit__guaranteed in close pathtest_vision, unrelated)Test Results
test_vision, unrelated to changes)Files Changed
113 files changed, +9990 / -6190 lines
Deferred
Task 0.1 (integration test fixture) intentionally deferred — requires a dedicated CI environment with real model endpoints.