## Summary
- make the builtin MCP config test derive the expected `--codex-home`
argument from `AbsolutePathBuf`
## Why
`AbsolutePathBuf::try_from("/tmp/codex-home")` is rendered as
`D:\\tmp\\codex-home` on Windows, but the test asserted the Unix literal
`"/tmp/codex-home"`. That made the Windows Bazel job fail even though
the production code was behaving correctly.
## Impact
This keeps the test cross-platform while preserving the same transport
assertion on Unix and Windows.
## Validation
- `cargo test -p codex-builtin-mcps`
Co-authored-by: Codex <noreply@openai.com>
## Why
`session_id` and `thread_id` are separate identities after #20437, but
app-server only surfaced `sessionId` on the `thread/start`,
`thread/resume`, and `thread/fork` response envelopes. Other
thread-bearing surfaces such as `thread/list`, `thread/read`,
`thread/started`, `thread/rollback`, `thread/metadata/update`, and
`thread/unarchive` either lacked the grouping key or forced clients to
special-case those three responses.
Making `sessionId` part of the reusable `Thread` payload gives every v2
API surface one place to expose session-tree identity.
## Mental model
1. thread.sessionId lives on `Thread`
2. It is a view/runtime identity for the current live session tree, not
durable stored lineage metadata
3. When app-server has a live loaded thread, it copies the real value
from core’s session_configured.session_id
4. When it only has stored/unloaded data, it falls back to
thread.sessionId = thread.id
## What changed
- Added `sessionId` to the v2
[`Thread`](8fc9e9b4cf/codex-rs/app-server-protocol/src/protocol/v2/thread_data.rs (L105-L109)).
- Removed the duplicate top-level `sessionId` fields from
`thread/start`, `thread/resume`, and `thread/fork`; clients should now
read `response.thread.sessionId`.
- Populated `thread.sessionId` when building live thread responses,
replaying loaded threads, and returning stored-thread summaries so the
field is present across start, resume, fork, list, read, rollback,
metadata-update, unarchive, and `thread/started` paths. See
[`load_thread_from_resume_source_or_send_internal`](8fc9e9b4cf/codex-rs/app-server/src/request_processors/thread_processor.rs (L2824-L2918))
and
[`thread_from_stored_thread`](8fc9e9b4cf/codex-rs/app-server/src/request_processors/thread_processor.rs (L3671-L3719)).
- Preserved the stored-thread fallback: if a thread has not been loaded
into a live session tree yet, `thread.sessionId` falls back to
`thread.id`; once the thread is live again, the field reports the active
session tree root.
- Regenerated the JSON/TypeScript schemas and updated the app-server
README examples to show
[`thread.sessionId`](8fc9e9b4cf/codex-rs/app-server/README.md (L306-L310))
on the thread object.
## Summary
- resolve or inject the installation ID before core startup and pass it
through `ThreadManager`, `CodexSpawnArgs`, and `Session` as a plain
`String`
- keep child sessions on the parent installation ID instead of
rediscovering it inside core
- propagate installation ID startup failures in `mcp-server` instead of
panicking
## Why
Core was still touching the filesystem on the session startup path to
discover `installation_id`. This moves that work to the outer host
boundary so core no longer depends on `codex_home` reads during session
construction.
---------
Co-authored-by: Codex <noreply@openai.com>
## Why
`/responses/compact` should preserve the request-affinity fields that
apply to the active auth mode. ChatGPT-auth compact requests need the
effective `service_tier`, and compact requests for every auth mode need
the stable `prompt_cache_key`, so compaction does not quietly lose
routing or cache behavior that normal sampling already has.
This follows the request-parity direction from #20719, but keeps the net
change focused on the compact payload fields needed here.
## What changed
- Add `service_tier` and `prompt_cache_key` to the compact endpoint
input payload.
- Build the remote compact payload from the existing responses request
builder output so `Fast` still maps to `priority` when compact sends a
service tier.
- Pass the turn service tier into remote compaction, but only include it
in compact payloads for ChatGPT-backed auth.
- Keep `prompt_cache_key` on compact payloads for all auth modes.
- Add request-body diff snapshot coverage in
`core/tests/suite/compact_remote.rs` for:
- API-key auth reusing `prompt_cache_key` while omitting `service_tier`
even when `Fast` is configured.
- ChatGPT auth reusing both `service_tier` and `prompt_cache_key`.
- Drive the snapshot coverage through five varied turns: plain text,
multi-part text, tool-call continuation, image+text input, local-shell
continuation, and final-turn reasoning output.
## Verification
- Added insta snapshots for compact request-body parity against the last
normal `/responses` request after five varied turns.
- Not run locally per repo guidance; relying on GitHub CI for test
execution.
---------
Co-authored-by: Codex <noreply@openai.com>
## Why
`thread/start` and `thread/resume` already return `sessionId`, but
`thread/fork` only returned the new thread. That left clients to infer
the forked thread's session identity from `thread.id`, which kept the
new `session_id` / `thread_id` split implicit at one lifecycle boundary.
Follow-up to #20437.
## What changed
- Add `sessionId` to `ThreadForkResponse`.
- Populate it from the forked session configuration.
- Regenerate the v2 JSON/TypeScript schema fixtures and update the
app-server docs/example.
- Extend the fork integration test to assert the returned `sessionId`.
## Verification
- Added coverage in `thread_fork_creates_new_thread_and_emits_started`
for the new response field.
## Why
MCP tool calls already include `session_id` in `x-codex-turn-metadata`,
but descendant threads intentionally share that value with the root
thread. Consumers that need to correlate work at the concrete thread
level also need the current `thread_id`.
## What changed
- add `thread_id` to `x-codex-turn-metadata` while preserving
`session_id` as the shared session identity
- thread the two identities separately through normal turns and spawned
review threads
- add regression coverage for resumed sessions, reserved metadata
fields, and deferred MCP tool calls
## Verification
- added focused coverage in `core/src/session/tests.rs`,
`core/src/turn_metadata_tests.rs`, and `core/tests/suite/search_tool.rs`
## Why
The in-process `app-server-client` tests were still building their
configs from the ambient `codex_home` and letting the embedded app
server create its own state DB when `state_db` was absent. That matters
because in-process startup falls back to
`init_state_db_from_config(...)` in that case, so tests can otherwise
share persisted state instead of getting isolated fixtures:
[`app-server/src/in_process.rs`](a98623511b/codex-rs/app-server/src/in_process.rs (L368-L373)).
## What changed
- Give each in-process test client its own temporary `codex_home`.
- Initialize the matching state DB from that per-client config and pass
it into the client explicitly.
- Keep the temp directory alive for the lifetime of the test client
through a small `TestClient` wrapper.
- Add `tempfile` as a dev dependency for the new harness.
The updated setup lives in
[`app-server-client/src/lib.rs`](35c1133d45/codex-rs/app-server-client/src/lib.rs (L982-L1055)).
## Testing
- Existing `codex-app-server-client` tests continue to exercise the
updated in-process client path through the isolated helper.
## Summary
Related to
https://openai.slack.com/archives/C095U48JNL9/p1777537279707449
TLDR:
We update the meaning of session ids and thread ids:
* thread_id stays as now
* session_id become a shared id between every thread under a /root
thread (i.e. every sub-agent share the same session id)
This PR introduces an explicit `SessionId` and threads it through the
protocol/client boundary so `session_id` and `thread_id` can diverge
when they need to, while preserving compatibility for older serialized
`session_configured` events.
---------
Co-authored-by: Codex <noreply@openai.com>
## Why
#21255 changed the Linux sandbox fallback so Codex can use a bundled
`codex-resources/bwrap` executable when no suitable system `bwrap` is
available. That lookup is relative to the native Codex executable
returned by
`std::env::current_exe()`, as implemented in
[`bundled_bwrap.rs`](9766d3d51c/codex-rs/linux-sandbox/src/bundled_bwrap.rs (L83-L93)).
The release already publishes a separate `bwrap` DotSlash output, but
the Linux `codex` DotSlash output still pointed at a single-binary
`.zst` payload. Running the `codex` DotSlash manifest only materializes
the native `codex` executable; it does not also create sibling files
from the separate `bwrap` manifest. The fallback path therefore needs
the Linux `codex` DotSlash artifact itself to include the real `bwrap`
executable at `codex-resources/bwrap`.
## What changed
- stage a Linux primary `codex-<target>-bundle.tar.zst` release artifact
containing `codex` and `codex-resources/bwrap`
- point the Linux `codex` DotSlash outputs at that bundle tarball
- leave the standalone `bwrap` DotSlash output in place for consumers
that want to fetch `bwrap` directly
## Verification
- `jq . .github/dotslash-config.json`
- Ruby YAML parse of `.github/workflows/rust-release.yml`
