Files
codex/codex-rs/thread-store
Eric Traut 80e0b51c9e Make session lookup pagination stable and report listing failures (#51230)
## Why

Session activity can move unread threads ahead of a pagination cursor, and timestamp-only cursors can skip threads with equal creation times. Either can prevent a session label lookup from detecting duplicate labels. Database failures must also remain distinguishable from an exhausted listing.

## What changed

- Resolve session labels using database-only listings ordered by `CreatedAt`, with thread IDs breaking timestamp ties. Accept unique matches across pages with valid timestamp-and-ID cursors, while retaining ambiguity errors for older cursors that cannot establish uniqueness.
- Preserve timestamp index ranges for database continuation queries and timestamp-only cursors for listings that may fall back to the filesystem.
- Propagate database-only listing and name-resolution failures. Keep best-effort name enrichment for ordinary listings and retry latest-session lookup with scan-and-repair after a database-only error.
- Keep loaded sessions selectable in the resume and fork pickers when a later page fails, stop further pagination, and display `Could not load more sessions`.

## Testing

Add regression coverage for creation-time continuation after session activity, cursor query plans, filesystem fallback, database and name-query errors, cross-page label uniqueness, older server cursors, and selection after picker pagination failures.

GitOrigin-RevId: 264ab2e69b8ad12d9edaa31fd253cb9805a46a90
2026-10-06 02:14:22 +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.