Tianyi Cui 301a3d1233 fix(session-persistence): scope the ownerless-state claim to the cwd (review) ...

A reviewer found a cross-cwd hole: the ownerless-state claim path validated only
the seed prefix (via loadStored, any scope) and never compared the tracked
header's cwd to the live session's. So an ownerless `create(meta(id, "/a"))`
with cursor 0 (seed matches trivially) was claimed by a live session with the
same id at cwd "/b", and the "/b" events then appended under the "/a" header —
bypassing the cwd-scoped loadLive() guard that the HMR-adopt path (case 2) uses.

Add a cwd equality check before the seed check in the ownerless-claim branch: a
same-id ownerless artifact at a different cwd is a collision, not a claim. This
is a coordinator-level invariant (the live session's cwd must match the tracked
meta's cwd) and applies to both backends.

Tests (shared coordinator contract, run per backend): a live session at a
different cwd cannot claim cursor-0 ownerless state, cannot claim a
loaded-prefix even when the seed matches, and a no-cwd state cannot be claimed
by a cwd'd session. All fail without the guard.

Also documents WHY the `materialized` flag is needed (lazy create leaves no
artifact; it distinguishes registered-but-unwritten from durably-present for
has()/reclaim) and reframes the module doc to current-state, not the refactor
history (per the new AGENTS.md doc convention).

2026-06-20 12:50:55 +08:00

..

coordinator.ts

fix(session-persistence): scope the ownerless-state claim to the cwd (review)

2026-06-20 12:50:55 +08:00

index.ts

refactor(session-persistence): extract a shared write coordinator

2026-06-20 03:47:28 +08:00