Brent Traut e45069d770 Add experimental app-server thread read-state updates (#52395) ...

## Why

Clients need to mark threads read or unread without overwriting unseen results or another window's explicit mark.

## What changed

Add `thread/readState/update` for eligible durable local threads, gated by `initialize.capabilities.experimentalApi`. Requests include `threadId`, `expectedRevision`, and an operation of `{type:"read"}` or `{type:"unread"}`.

Marking read clears `firstUnread`; marking unread sets it to `threadStart`. Successful updates return the read state and notify subscribers through `thread/readState/changed`. Both operations require an exact revision match. Stale requests return `-32600` with `readStateConflict` and the current read state, requiring a fresh user action rather than a blind retry. Updates do not change thread recency.

## Testing

Add app-server coverage for experimental capability gating, explicit unread marks and notifications, conflicts for both stale operations, and marking read with a fresh revision.

GitOrigin-RevId: 775f6e9584dc91bd3c2ee9a309144b5baf0edffa

2026-10-09 03:42:19 +00:00

..

python

Add experimental app-server thread read-state updates (#52395)

2026-10-09 03:42:19 +00:00

python-runtime

[codex] Add independent beta release for the Python SDK (#24828)

2026-05-27 17:57:51 -07:00

typescript

Add per-turn Cyber access program selection to exec and the SDK (#49939)

2026-10-01 08:57:53 +00:00