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## Why Dynamic tools are defined at thread start and already stored in rollout `SessionMeta`, which restores resumed and forked sessions. Persisting the same tools through SQLite creates a second runtime persistence path that is unnecessary prework for the explicit namespace refactor. ## What changed - Restore missing thread-start dynamic tools directly from rollout history, including when SQLite is enabled. - Remove SQLite dynamic-tool reads, writes, backfill, and thread metadata patch plumbing. - Add SQLite-enabled resume integration coverage that verifies a rollout-defined dynamic tool is still sent after resume. ## Compatibility The existing `thread_dynamic_tools` table is intentionally not dropped even though it's now unused. Older Codex binaries are allowed to open databases migrated by newer binaries and still reference this table; dropping it would break that mixed-version path. See [here](https://github.com/openai/codex/blob/main/codex-rs/state/src/migrations.rs#L10-L11). ## Verification - `just test -p codex-state -p codex-rollout -p codex-thread-store` - `just test -p codex-core --test all resume_restores_dynamic_tools_from_rollout_with_sqlite_enabled`
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_itemsis the raw canonical history append API. It does not infer metadata from item contents.ThreadStore::update_thread_metadatais 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.LiveThreadis 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 throughThreadStore::update_thread_metadata.ThreadManagerroutes metadata mutations for loaded and cold threads through one entrypoint. Loaded threads use theirLiveThread; cold threads go directly to the store.LocalThreadStorepersists history throughcodex-rolloutJSONL 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.RolloutRecorderis the local JSONL writer. It writes already-canonical items forThreadStore::append_items; it no longer decides metadata updates for live thread-store appends.core/sessioncreates or resumesLiveThreadhandles 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.