Files
codex/codex-rs/thread-store
Owen Lin fa1d4c40d0 Gate paginated thread history on the state database (#35787)
## Why

Local thread stores without an initialized state database should not implicitly
create SQLite files or partially delete threads that have materialized history.

## What changed

- Report paginated history listing as unsupported when no state database is
  available, and skip history projection and materialization in that mode.
- Reject paginated forks without a state database.
- Validate access to materialized history before deleting rollout files, so a
  failed deletion preserves both the rollout and its history rows.

## Testing

Added coverage that a store without a state database creates no SQLite files
and preserves materialized history when deletion is unsupported. Existing
projection tests now initialize the state runtime explicitly.

GitOrigin-RevId: 2eaa0f5f0de8d5e4d84375ec50b310746a0ee68e
2026-07-28 16:00:39 +00:00
..
2026-04-14 13:51:00 -07:00

Thread Store

codex-thread-store is the storage boundary for Codex threads. It defines the ThreadStore trait plus local and in-memory implementations. Other storage implementations may live outside this repository.

Responsibilities

  • ThreadStore::append_items is the raw canonical history append API. It does not infer metadata from item contents.
  • ThreadStore::update_thread_metadata is the only thread metadata write API. It accepts a single literal metadata patch shape, regardless of whether the caller is applying a user/API mutation or facts derived above the store from appended history.
  • LiveThread is the preferred API for active session persistence. It owns a per-thread metadata sync helper, applies the rollout persistence policy, appends canonical history, and then sends metadata patches through ThreadStore::update_thread_metadata.
  • ThreadManager routes metadata mutations for loaded and cold threads through one entrypoint. Loaded threads use their LiveThread; cold threads go directly to the store.
  • LocalThreadStore persists history through codex-rollout JSONL files and persists queryable metadata through the SQLite state database when available. Local explicit metadata mutations also maintain JSONL/name-index compatibility so reading old or SQLite-less local storage keeps working.
  • RolloutRecorder is the local JSONL writer. It writes already-canonical items for ThreadStore::append_items; it no longer decides metadata updates for live thread-store appends.
  • core/session creates or resumes LiveThread handles and does not need to know whether persistence is backed by local files or another store.

Direction

New metadata observation semantics should live above ThreadStore. Stores persist explicit metadata fields, but raw history appends remain history-only.