One planning session can now create multiple tasks. Task-creation claims
are epoch-scoped: proposalClaimId stays planning-session:{id} for epoch 0
and becomes planning-session:{id}#N after the plan is edited past a
created task (rotateTaskCreationEpochOnReopen archives createdTaskId into
createdTaskIds and resets claim state). Unedited Proceed replays stay
idempotent within an epoch; crash-after-insert dedup still reconciles via
the epoch-keyed task row. Complete sessions resume to an editable plan
review with a linked-task banner; the task-created handoff gains a
Continue planning action.
Hardening from the multi-agent code review (9 reviewers):
- Reopen + rotation run only AFTER turn admission, so a rejected request
never burns a phantom rotation (P1, 3 reviewers).
- Claim-lifecycle CAS writes are surgical jsonb merges and reconcile takes
an expected-epoch guard, so a concurrent rotation can never be reverted
or an archived task re-linked to a new epoch.
- create-task 409s while the session is still generating (turn-completion
persist could tear the fresh linkage).
- Durable-read fallback in create-task now logs before trusting the
in-memory epoch.
- linkedTaskId no longer leaks across session switches; the banner
resolves the just-created Task before the tasks prop refreshes and
falls back to the newest archived task after rotation; Continue
planning re-registers the active session.
- Shared applyCompletePlanningResume helper replaces triplicated resume
view-transitions; stale one-task-per-session comment corrected.
Tests: post-rotation replay idempotency and epoch-keyed crash reconcile
(e2e), rewind rotation + rejected-rewind non-rotation + payload
normalization round-trip (unit), Continue planning + banner-leak (UI),
create-task 409 (routes), and a new PG integration suite pinning the
surgical CAS merge and reconcile epoch guard.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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