## Why
`thread_resume` tests can intentionally create an in-flight turn, assert
a `thread/resume` error path, and return immediately. That leaves turn
work active during teardown, which can surface as intermittent `LEAK`
failures.
Sample output that motivated this investigation (reported during test
runs):
```text
LEAK ... codex-app-server::all suite::v2::thread_resume::thread_resume_rejoins_running_thread_even_with_override_mismatch
```
## What Changed
Updated only `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`
Both tests now:
1. capture the running turn id from `TurnStartResponse`
2. assert the expected `thread/resume` error
3. call `turn/interrupt` for that running turn
4. wait for `codex/event/turn_aborted` before returning
## Why This Is The Correct Fix
These tests are specifically validating resume behavior while a turn is
active. They should also own cleanup of that active turn before exiting.
Explicitly interrupting and waiting for the terminal abort notification
removes teardown races and avoids relying on process-drop behavior to
clean up in-flight work.
## Repro / Verification
Repro command used for investigation:
```bash
cargo nextest run -p codex-app-server -j 2 --no-fail-fast --stress-count 50 --status-level leak --final-status-level fail -E 'test(suite::v2::thread_resume::thread_resume_rejoins_running_thread_even_with_override_mismatch) | test(suite::v2::thread_resume::thread_resume_rejects_history_when_thread_is_running) | test(suite::v2::thread_resume::thread_resume_rejects_mismatched_path_when_thread_is_running) | test(suite::v2::thread_resume::thread_resume_keeps_in_flight_turn_streaming)'
```
Observed before this change: intermittent `LEAK` in
`thread_resume_rejects_history_when_thread_is_running`.
Also verified with:
- `cargo test -p codex-app-server`
---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/openai/codex/pull/12269).
* #12271
* __->__ #12269
## Summary
Implements the `ConfigToml.permissions.network` and uses it to populate
`NetworkProxyConfig`. We now parse a new nested permissions/network
config shape which is converted into the proxy’s runtime config.
When managed requirements exist, we still apply those constraints on top
of user settings (so managed policy still wins).
* Cleaned up the old constructor path so it now accepts both user config
+ managed constraints directly.
* Updated the reload path so live proxy config reloads respect
[permissions.network] too, while still supporting the existing top-level
[network] format.
### Behavior
- User-defined `[permissions.network]` values are now honored.
- Managed constraints still take effect and are validated against the
resulting policy.
If a first-party proc_macro crate has tests/binaries that would get
autogenerated by the macro, it was being handled incorrectly. Found by
an external OS contributor!
## Summary
Implements a configurable MCP OAuth callback URL override for `codex mcp
login` and app-server OAuth login flows, including support for non-local
callback endpoints (for example, devbox ingress URLs).
## What changed
- Added new config key: `mcp_oauth_callback_url` in
`~/.codex/config.toml`.
- OAuth authorization now uses `mcp_oauth_callback_url` as
`redirect_uri` when set.
- Callback handling validates the callback path against the configured
redirect URI path.
- Listener bind behavior is now host-aware:
- local callback URL hosts (`localhost`, `127.0.0.1`, `::1`) bind to
`127.0.0.1`
- non-local callback URL hosts bind to `0.0.0.0`
- `mcp_oauth_callback_port` remains supported and is used for the
listener port.
- Wired through:
- CLI MCP login flow
- App-server MCP OAuth login flow
- Skill dependency OAuth login flow
- Updated config schema and config tests.
## Why
Some environments need OAuth callbacks to land on a specific reachable
URL (for example ingress in remote devboxes), not loopback. This change
allows that while preserving local defaults for existing users.
## Backward compatibility
- No behavior change when `mcp_oauth_callback_url` is unset.
- Existing `mcp_oauth_callback_port` behavior remains intact.
- Local callback flows continue binding to loopback by default.
## Testing
- `cargo test -p codex-rmcp-client callback -- --nocapture`
- `cargo test -p codex-core --lib mcp_oauth_callback -- --nocapture`
- `cargo check -p codex-cli -p codex-app-server -p codex-rmcp-client`
## Example config
```toml
mcp_oauth_callback_port = 5555
mcp_oauth_callback_url = "https://<devbox>-<namespace>.gateway.<cluster>.internal.api.openai.org/callback"
## Summary
- The experimental Bazel CI builds fail on all platforms because askama
resolves template paths relative to `CARGO_MANIFEST_DIR`, which points
outside the Bazel sandbox. This produces errors like:
```
error: couldn't read
`codex-rs/core/src/memories/../../../../../../../../../../../work/codex/codex/codex-rs/core/templates/memories/consolidation.md`:
No such file or directory
```
- Replaced `#[derive(Template)]` + `#[template(path = "...")]` with
`include_str!` + `str::replace()` for the three affected templates
(`consolidation.md`, `stage_one_input.md`, `read_path.md`).
`include_str!` resolves paths relative to the source file, which works
correctly in both Cargo and Bazel builds.
- The templates only use simple `{{ variable }}` substitution with no
control flow or filters, so no askama functionality is lost.
- Removes the `askama` dependency from `codex-core` since it was the
only crate using it. The workspace-level dependency definition is left
in place.
- This matches the existing pattern used throughout the codebase — e.g.
`codex-rs/core/src/memories/mod.rs` already uses
`include_str!("../../templates/memories/stage_one_system.md")` for the
fourth template file.
## Test plan
- [ ] Verify Bazel (experimental) CI passes on all platforms
- [ ] Verify rust-ci (Cargo) builds and tests continue to pass
- [ ] Verify `cargo test -p codex-core` passes locally
## Why
`cargo nextest` was intermittently reporting `LEAK` for
`codex-app-server` tests even when assertions passed. This adds noise
and flakiness to local/CI signals.
Sample output used as the basis of this investigation:
```text
LEAK [ 7.578s] ( 149/3663) codex-app-server::all suite::output_schema::send_user_turn_output_schema_is_per_turn_v1
LEAK [ 7.383s] ( 210/3663) codex-app-server::all suite::v2::dynamic_tools::dynamic_tool_call_round_trip_sends_text_content_items_to_model
LEAK [ 7.768s] ( 213/3663) codex-app-server::all suite::v2::dynamic_tools::thread_start_injects_dynamic_tools_into_model_requests
LEAK [ 8.841s] ( 224/3663) codex-app-server::all suite::v2::output_schema::turn_start_accepts_output_schema_v2
LEAK [ 8.151s] ( 225/3663) codex-app-server::all suite::v2::plan_item::plan_mode_uses_proposed_plan_block_for_plan_item
LEAK [ 8.230s] ( 232/3663) codex-app-server::all suite::v2::safety_check_downgrade::openai_model_header_mismatch_emits_model_rerouted_notification_v2
LEAK [ 6.472s] ( 273/3663) codex-app-server::all suite::v2::turn_start::turn_start_accepts_collaboration_mode_override_v2
LEAK [ 6.107s] ( 275/3663) codex-app-server::all suite::v2::turn_start::turn_start_accepts_personality_override_v2
```
## How I Reproduced
I focused on the suspect tests and ran them under `nextest` stress mode
with leak reporting enabled.
```bash
cargo nextest run -p codex-app-server -j 2 --no-fail-fast --stress-count 25 --status-level leak --final-status-level fail -E 'test(suite::output_schema::send_user_turn_output_schema_is_per_turn_v1) | test(suite::v2::dynamic_tools::dynamic_tool_call_round_trip_sends_text_content_items_to_model) | test(suite::v2::dynamic_tools::thread_start_injects_dynamic_tools_into_model_requests) | test(suite::v2::output_schema::turn_start_accepts_output_schema_v2) | test(suite::v2::plan_item::plan_mode_uses_proposed_plan_block_for_plan_item) | test(suite::v2::safety_check_downgrade::openai_model_header_mismatch_emits_model_rerouted_notification_v2) | test(suite::v2::turn_start::turn_start_accepts_collaboration_mode_override_v2) | test(suite::v2::turn_start::turn_start_accepts_personality_override_v2)'
```
This reproduced intermittent `LEAK` statuses while tests still passed.
## What Changed
In `codex-rs/app-server/tests/common/mcp_process.rs`:
- Changed `stdin: ChildStdin` to `stdin: Option<ChildStdin>` so teardown
can explicitly close stdin.
- In `Drop`, close stdin first to trigger EOF-based graceful shutdown.
- Wait briefly for graceful exit.
- If still running, fall back to `start_kill()` and the existing bounded
`try_wait()` loop.
- Updated send-path handling to bail if stdin is already closed.
## Why This Is the Right Fix
The leak signal was caused by child-process teardown timing, not
test-logic assertion failure. The helper previously relied mostly on
force-kill timing in `Drop`; that can race with nextest leak detection.
Closing stdin first gives `codex-app-server` a deterministic, graceful
shutdown path before force-kill. Keeping the force-kill fallback
preserves robustness if graceful shutdown does not complete in time.
## Verification
- `cargo test -p codex-app-server`
- Re-ran the stress repro above after this change: no `LEAK` statuses
observed.
- Additional high-signal stress run also showed no leaks:
```bash
cargo nextest run -p codex-app-server -j 2 --no-fail-fast --stress-count 100 --status-level leak --final-status-level fail -E 'test(suite::output_schema::send_user_turn_output_schema_is_per_turn_v1) | test(suite::v2::dynamic_tools::dynamic_tool_call_round_trip_sends_text_content_items_to_model)'
```
## Summary
- Require revised `<proposed_plan>` blocks in the same planning session
to be complete replacements, not partial/delta plans.
- Scope that cumulative replacement rule to the current planning session
only.
- Clarify that after leaving Plan mode (for example switching to Default
mode to implement) or when explicitly asked for a new plan, the model
should produce a new self-contained plan without inheriting prior plan
blocks unless requested.
## Testing
- Not run (prompt/template text-only change).
Summary
- avoid emitting metrics for features marked as `Stage::Removed`
- keep feature metrics aligned with active and planned states only
Testing
- Not run (not requested)
## Why
`McpConnectionManager` used a two-phase setup (`new()` followed by
`initialize()`), which forced call sites to construct placeholder state
and then mutate it asynchronously. That made MCP startup/refresh flows
harder to follow and easier to misuse, especially around cancellation
token ownership.
## What changed
- Replaced the two-phase initialization flow with a single async
constructor: `McpConnectionManager::new(...) -> (Self,
CancellationToken)`.
- Added `McpConnectionManager::new_uninitialized()` for places that need
an empty manager before async startup begins.
- Added `McpConnectionManager::new_mcp_connection_manager_for_tests()`
for test-only construction.
- Updated MCP startup and refresh call sites in
`codex-rs/core/src/codex.rs` to build a fresh manager via `new(...)`,
swap it in, and update the startup cancellation token consistently.
- Updated MCP snapshot/connector call sites in
`codex-rs/core/src/mcp/mod.rs` and `codex-rs/core/src/connectors.rs` to
use the consolidated constructor.
- Removed the now-obsolete `reset_mcp_startup_cancellation_token()`
helper in favor of explicit token replacement at the call sites.
## Testing
- Not run (refactor-only change; no new behavior was intended).
