Sessions have been agent-scoped since v34, but the schema kept four
dead task-scoped columns that every session code path had to pretend
were meaningful:
- tasks.active_session_id (mirrored agents.session_id)
- tasks.session_json (superseded by task_sessions.session_params_json)
- tasks.session_display_id (superseded by task_sessions.session_display_id)
- task_sessions.task_id (always empty-string on new rows)
v41 drops all four via SQLite table rebuild — the only safe path when
multiple columns need to go in one step and indexes / FK directions
need to be preserved. `PRAGMA foreign_keys = OFF` spans the swap
window so cascade-delete does not fire mid-rebuild. The migration is
idempotent and also backfills the optional task columns
(task_type / requires_user_review / retry_count / last_failure_at /
started_at / completed_at / cancelled_at / checkout_run_id /
execution_locked_at) before rebuilding so it works whether or not
`ensureOptionalColumns` has run yet on this install.
Along with the schema change, every code path that read or wrote
those columns has been rewired to the agent-scoped equivalents:
- task-sessions-crud.ts: deleted updateTaskSession,
getTaskSession, getActiveTaskSession, updateTasksActiveSessionForAgent;
added updateSessionParams(sessionId, ...) for the worker's
finalizer. ensureAgentSession and createNewSession no longer touch
task_id.
- database-base.ts: facade drops the now-unused pass-throughs.
- snapshot.ts / task-queries.ts / tasks-status.ts / entity-crud.ts:
SELECT projections no longer pull session_json / session_display_id
/ active_session_id from tasks.
- tasks-crud.ts (TaskRow) and shared/types/records-core.ts
(TaskRecord): sessionJson / sessionDisplayId fields removed.
- TaskSessionRecord: taskId field removed.
- turn-context.ts::resolveSession: no more
updateTasksActiveSessionForAgent mirror; sessionParams read directly
from the current session via getSessionById.
- run-finished-helpers.ts::finalizeRun: stamps sessionParams via
updateSessionParams on the agent's current session, resolved through
agents.session_id.
- session-management-service.ts: rotateSession stops calling
updateTasksActiveSessionForAgent.
Test suite updated to use the new session-id API. Existing tests used
`getActiveTaskSession(taskId)` and `createNewSession({ taskId, ...})`
as probes; they now use `getSessionById(sessionId)` and the taskId-less
createNewSession input.
Tests: 603/603 green. Typecheck clean. Migration tested on fresh DB
(runs v1→v41 cleanly) and idempotent re-apply (detects absent dead
columns, skips).
ZacharyZhang-NY
2ace9183b0