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Author SHA1 Message Date
neil-oai a92a5085bd Forward app-server turn clientMetadata to Responses (#16009) 
## Summary
App-server v2 already receives turn-scoped `clientMetadata`, but the
Rust app-server was dropping it before the outbound Responses request.
This change keeps the fix lightweight by threading that metadata through
the existing turn-metadata path rather than inventing a new transport.

## What we're trying to do and why
We want turn-scoped metadata from the app-server protocol layer,
especially fields like Hermes/GAAS run IDs, to survive all the way to
the actual Responses API request so it is visible in downstream
websocket request logging and analytics.

The specific bug was:
- app-server protocol uses camelCase `clientMetadata`
- Responses transport already has an existing turn metadata carrier:
`x-codex-turn-metadata`
- websocket transport already rewrites that header into
`request.request_body.client_metadata["x-codex-turn-metadata"]`
- but the Rust app-server never parsed or stored `clientMetadata`, so
nothing from the app-server request was making it into that existing
path

This PR fixes that without adding a new header or a second metadata
channel.

## How we did it
### Protocol surface
- Add optional `clientMetadata` to v2 `TurnStartParams` and
`TurnSteerParams`
- Regenerate the JSON schema / TypeScript fixtures
- Update app-server docs to describe the field and its behavior

### Runtime plumbing
- Add a dedicated core op for app-server user input carrying turn-scoped
metadata: `Op::UserInputWithClientMetadata`
- Wire `turn/start` and `turn/steer` through that op / signature path
instead of dropping the metadata at the message-processor boundary
- Store the metadata in `TurnMetadataState`

### Transport behavior
- Reuse the existing serialized `x-codex-turn-metadata` payload
- Merge the new app-server `clientMetadata` into that JSON additively
- Do **not** replace built-in reserved fields already present in the
turn metadata payload
- Keep websocket behavior unchanged at the outer shape level: it still
sends only `client_metadata["x-codex-turn-metadata"]`, but that JSON
string now contains the merged fields
- Keep HTTP fallback behavior unchanged except that the existing
`x-codex-turn-metadata` header now includes the merged fields too

### Request shape before / after
Before, a websocket `response.create` looked like:
```json
{
  "type": "response.create",
  "client_metadata": {
    "x-codex-turn-metadata": "{\"session_id\":\"...\",\"turn_id\":\"...\"}"
  }
}
```
Even if the app-server caller supplied `clientMetadata`, it was not
represented there.

After, the same request shape is preserved, but the serialized payload
now includes the new turn-scoped fields:
```json
{
  "type": "response.create",
  "client_metadata": {
    "x-codex-turn-metadata": "{\"session_id\":\"...\",\"turn_id\":\"...\",\"fiber_run_id\":\"fiber-start-123\",\"origin\":\"gaas\"}"
  }
}
```

## Validation
### Targeted tests added / updated
- protocol round-trip coverage for `clientMetadata` on `turn/start` and
`turn/steer`
- protocol round-trip coverage for `Op::UserInputWithClientMetadata`
- `TurnMetadataState` merge test proving client metadata is added
without overwriting reserved built-in fields
- websocket request-shape test proving outbound `response.create`
contains merged metadata inside
`client_metadata["x-codex-turn-metadata"]`
- app-server integration tests proving:
- `turn/start` forwards `clientMetadata` into the outbound Responses
request path
  - websocket warmup + real turn request both behave correctly
  - `turn/steer` updates the follow-up request metadata

### Commands run
- `just write-app-server-schema`
- `cargo test -p codex-app-server-protocol`
- `cargo test -p codex-protocol`
- `cargo test -p codex-core
turn_metadata_state_merges_client_metadata_without_replacing_reserved_fields
--lib`
- `cargo test -p codex-core --test all
responses_websocket_preserves_custom_turn_metadata_fields`
- `cargo test -p codex-app-server --test all client_metadata`
- `cargo test -p codex-app-server --test all
turn_start_forwards_client_metadata_to_responses_websocket_request_body_v2
-- --nocapture`
- `just fmt`
- `just fix -p codex-core -p codex-protocol -p codex-app-server-protocol
-p codex-app-server`
- `just fix -p codex-exec -p codex-tui-app-server`
- `just argument-comment-lint`

### Full suite note
`cargo test` in `codex-rs` still fails in:
-
`suite::v2::turn_interrupt::turn_interrupt_resolves_pending_command_approval_request`

I verified that same failure on a clean detached `HEAD` worktree with an
isolated `CARGO_TARGET_DIR`, so it is not caused by this patch.
 2026-04-09 11:52:37 -07:00
Owen Lin 72631755e0 chore(app-server): stop emitting codex/event/ notifications (#14392) 
## Description

This PR stops emitting legacy `codex/event/*` notifications from the
public app-server transports.

It's been a long time coming! app-server was still producing a raw
notification stream from core, alongside the typed app-server
notifications and server requests, for compatibility reasons. Now,
external clients should no longer be depending on those legacy
notifications, so this change removes them from the stdio and websocket
contract and updates the surrounding docs, examples, and tests to match.

### Caveat
I left the "in-process" version of app-server alone for now, since
`codex exec` was recently based on top of app-server via this in-process
form here: https://github.com/openai/codex/pull/14005

Seems like `codex exec` still consumes some legacy notifications
internally, so this branch only removes `codex/event/*` from app-server
over stdio and websockets.

## Follow-up

Once `codex exec` is fully migrated off `codex/event/*` notifications,
we'll be able to stop emitting them entirely entirely instead of just
filtering it at the external transport boundary.
 2026-03-12 00:45:20 +00:00
Eric Traut 28bfbb8f2b Enforce user input length cap (#12823) 
Currently there is no bound on the length of a user message submitted in
the TUI or through the app server interface. That means users can paste
many megabytes of text, which can lead to bad performance, hangs, and
crashes. In extreme cases, it can lead to a [kernel
panic](https://github.com/openai/codex/issues/12323).

This PR limits the length of a user input to 2**20 (about 1M)
characters. This value was chosen because it fills the entire context
window on the latest models, so accepting longer inputs wouldn't make
sense anyway.

Summary
- add a shared `MAX_USER_INPUT_TEXT_CHARS` constant in codex-protocol
and surface it in TUI and app server code
- block oversized submissions in the TUI submit flow and emit error
history cells when validation fails
- reject heavy app-server requests with JSON-RPC `-32602` and structured
`input_too_large` data, plus document the behavior

Testing
- ran the IDE extension with this change and verified that when I
attempt to paste a user message that's several MB long, it correctly
reports an error instead of crashing or making my computer hot.
 2026-02-25 22:23:51 -08:00
Michael Bolin 4fa304306b tests: centralize in-flight turn cleanup helper (#12271) 
## Why

Several tests intentionally exercise behavior while a turn is still
active. The cleanup sequence for those tests (`turn/interrupt` + waiting
for `codex/event/turn_aborted`) was duplicated across files, which made
the rationale easy to lose and the pattern easy to apply inconsistently.

This change centralizes that cleanup in one place with a single
explanatory doc comment.

## What Changed

### Added shared helper

In `codex-rs/app-server/tests/common/mcp_process.rs`:

- Added `McpProcess::interrupt_turn_and_wait_for_aborted(...)`.
- Added a doc comment explaining why explicit interrupt + terminal wait
is required for tests that intentionally leave a turn in-flight.

### Migrated call sites

Replaced duplicated interrupt/aborted blocks with the helper in:

- `codex-rs/app-server/tests/suite/v2/thread_resume.rs`
  - `thread_resume_rejects_history_when_thread_is_running`
  - `thread_resume_rejects_mismatched_path_when_thread_is_running`
- `codex-rs/app-server/tests/suite/v2/turn_start_zsh_fork.rs`
  - `turn_start_shell_zsh_fork_executes_command_v2`
-
`turn_start_shell_zsh_fork_subcommand_decline_marks_parent_declined_v2`
- `codex-rs/app-server/tests/suite/v2/turn_steer.rs`
  - `turn_steer_returns_active_turn_id`

### Existing cleanup retained

In `codex-rs/app-server/tests/suite/v2/turn_start.rs`:

- `turn_start_accepts_local_image_input` continues to explicitly wait
for `turn/completed` so the turn lifecycle is fully drained before test
exit.

## Verification

- `cargo test -p codex-app-server`
 2026-02-20 01:47:34 +00:00
Owen Lin 0d8b2b74c4 feat(app-server): turn/steer API (#10821) 
This PR adds a dedicated `turn/steer` API for appending user input to an
in-flight turn.

## Motivation
Currently, steering in the app is implemented by just calling
`turn/start` while a turn is running. This has some really weird quirks:
- Client gets back a new `turn.id`, even though streamed
events/approvals remained tied to the original active turn ID.
- All the various turn-level override params on `turn/start` do not
apply to the "steer", and would only apply to the next real turn.
- There can also be a race condition where the client thinks the turn is
active but the server has already completed it, so there might be bugs
if the client has baked in some client-specific behavior thinking it's a
steer when in fact the server kicked off a new turn. This is
particularly possible when running a client against a remote app-server.

Having a dedicated `turn/steer` API eliminates all those quirks.

`turn/steer` behavior:
- Requires an active turn on threadId. Returns a JSON-RPC error if there
is no active turn.
- If expectedTurnId is provided, it must match the active turn (more
useful when connecting to a remote app-server).
- Does not emit `turn/started`.
- Does not accept turn overrides (`cwd`, `model`, `sandbox`, etc.) or
`outputSchema` to accurately reflect that these are not applied when
steering.
 2026-02-06 00:35:04 +00:00