codex

fix: Features should be immutable over the lifetime of a session/thread (#7540 )

I noticed that `features: Features` was defined on `struct
SessionConfiguration`, which is commonly owned by `SessionState`, which
is in turn owned by `Session`.

Though I do not believe that `Features` should be allowed to be modified
over the course of a session (if the feature state is not invariant, it
makes it harder to reason about), which argues that it should live on
`Session` rather than `SessionState` or `SessionConfiguration`.

This PR moves `Features` to `Session` and updates all call sites. It
appears the only place we were mutating `Features` was:

- in tests
- the sub-agent config for a review task:


https://github.com/openai/codex/blob/3ef76ff29d5eed258fb6b8550e0e2b973d0dca21/codex-rs/core/src/tasks/review.rs#L86-L89

Note this change also means it is no longer an `async` call to check the
state of a feature, eliminating the possibility of a
[TOCTTOU](https://en.wikipedia.org/wiki/Time-of-check_to_time-of-use)
error between checking the state of a feature and acting on it:


https://github.com/openai/codex/blob/3ef76ff29d5eed258fb6b8550e0e2b973d0dca21/codex-rs/core/src/codex.rs#L1069-L1076

Michael Bolin · 2025-12-03 16:12:31 -08:00

1cfc967eb8

feat: add compaction event (#7289 )

jif-oai · 2025-11-25 16:12:14 +00:00

9ba27cfa0a

[app-server & core] introduce new codex error code and v2 app-server error events (#6938 )

This PR does two things:
1. populate a new `codex_error_code` protocol in error events sent from
core to client;
2. old v1 core events `codex/event/stream_error` and `codex/event/error`
will now both become `error`. We also show codex error code for
turncompleted -> error status.

new events in app server test:
```
< {
<   "method": "codex/event/stream_error",
<   "params": {
<     "conversationId": "019aa34c-0c14-70e0-9706-98520a760d67",
<     "id": "0",
<     "msg": {
<       "codex_error_code": {
<         "response_stream_disconnected": {
<           "http_status_code": 401
<         }
<       },
<       "message": "Reconnecting... 2/5",
<       "type": "stream_error"
<     }
<   }
< }

 {
<   "method": "error",
<   "params": {
<     "error": {
<       "codexErrorCode": {
<         "responseStreamDisconnected": {
<           "httpStatusCode": 401
<         }
<       },
<       "message": "Reconnecting... 2/5"
<     }
<   }
< }

< {
<   "method": "turn/completed",
<   "params": {
<     "turn": {
<       "error": {
<         "codexErrorCode": {
<           "responseTooManyFailedAttempts": {
<             "httpStatusCode": 401
<           }
<         },
<         "message": "exceeded retry limit, last status: 401 Unauthorized, request id: 9a1b495a1a97ed3e-SJC"
<       },
<       "id": "0",
<       "items": [],
<       "status": "failed"
<     }
<   }
< }
```

Celia Chen · 2025-11-20 23:06:55 +00:00

9bce050385

Revert "[core] add optional status_code to error events (#6865 )" (#6955 )

This reverts commit c2ec477d93.

# External (non-OpenAI) Pull Request Requirements

Before opening this Pull Request, please read the dedicated
"Contributing" markdown file or your PR may be closed:
https://github.com/openai/codex/blob/main/docs/contributing.md

If your PR conforms to our contribution guidelines, replace this text
with a detailed and high quality description of your changes.

Include a link to a bug report or enhancement request.

Celia Chen · 2025-11-20 01:26:14 +00:00

72a1453ac5

[core] add optional status_code to error events (#6865 )

We want to better uncover error status code for clients. Add an optional
status_code to error events (thread error, error, stream error) so app
server could uncover the status code from the client side later.

in event log:
```
< {
<   "method": "codex/event/stream_error",
<   "params": {
<     "conversationId": "019a9a32-f576-7292-9711-8e57e8063536",
<     "id": "0",
<     "msg": {
<       "message": "Reconnecting... 5/5",
<       "status_code": 401,
<       "type": "stream_error"
<     }
<   }
< }
< {
<   "method": "codex/event/error",
<   "params": {
<     "conversationId": "019a9a32-f576-7292-9711-8e57e8063536",
<     "id": "0",
<     "msg": {
<       "message": "exceeded retry limit, last status: 401 Unauthorized, request id: 9a0cb03a485067f7-SJC",
<       "status_code": 401,
<       "type": "error"
<     }
<   }
< }
```

Celia Chen · 2025-11-19 19:51:21 +00:00

c2ec477d93

chore: consolidate compaction token usage (#6894 )

jif-oai · 2025-11-19 11:26:01 +00:00

3e9e1d993d

Run remote auto compaction (#6879 )

pakrym-oai · 2025-11-19 00:43:58 -08:00

75f38f16dd

Add the utility to truncate by tokens (#6746 )

- This PR is to make it on path for truncating by tokens. This path will
be initially used by unified exec and context manager (responsible for
MCP calls mainly).
- We are exposing new config `calls_output_max_tokens`
- Use `tokens` as the main budget unit but truncate based on the model
family by Introducing `TruncationPolicy`.
- Introduce `truncate_text` as a router for truncation based on the
mode.

In next PRs:
- remove truncate_with_line_bytes_budget
- Add the ability to the model to override the token budget.

Ahmed Ibrahim · 2025-11-18 11:36:23 -08:00

3de8790714

feat: remote compaction (#6795 )

Co-authored-by: pakrym-oai <pakrym@openai.com>

jif-oai · 2025-11-18 16:51:16 +00:00

838531d3e4

Improve compact (#6692 )

This PR does the following:
- Add compact prefix to the summary
- Change the compaction prompt
- Allow multiple compaction for long running tasks
- Filter out summary messages on the following compaction

Considerations:
- Filtering out the summary message isn't the most clean
- Theoretically, we can end up in infinite compaction loop if the user
messages > compaction limit . However, that's not possible in today's
code because we have hard cap on user messages.
- We need to address having multiple user messages because it confuses
the model.

Testing:
- Making sure that after compact we always end up with one user message
(task) and one summary, even on multiple compaction.

Ahmed Ibrahim · 2025-11-15 07:17:51 +00:00

0b28e72b66

feat: proxy context left after compaction (#6597 )

jif-oai · 2025-11-13 16:54:03 +01:00

2a417c47ac

Move compact (#6454 )

jif-oai · 2025-11-10 11:59:48 +00:00

50a77dc138

12 Commits