## Why
Fixesopenai/codex#20944.
Desktop side chats are intentionally ephemeral and pathless. They can
still accept live turns while loaded, but after a reload there is no
persisted rollout to resume. In the reported failure mode, Desktop could
send `$CODEX_HOME` as the resume/fork path for one of these pathless
side chats.
`thread/resume` and `thread/fork` prefer an explicit `path` over
`threadId`, and rollout path lookup only checked that a candidate
existed. That let `$CODEX_HOME` pass as a rollout path, so the later
rollout reader tried to open a directory and surfaced the low-level `Is
a directory` error.
## What Changed
- Reject explicit rollout paths that resolve to a directory or other
non-file before attempting to read rollout history.
- Make `codex_rollout::existing_rollout_path` return only plain or
compressed rollout candidates that are actual files.
- Add an app-server regression test that creates an ephemeral fork, runs
a turn while the side thread is loaded, simulates reload, then verifies
both `thread/resume` and `thread/fork` reject `$CODEX_HOME` with `path
is a directory` instead of the OS-level directory-read error.
- Rebase over the `TestAppServer` rename and update the remaining stale
test harness call sites to use `TestAppServer` with `app_server` local
variables.
Relevant code:
- `thread-store/src/local/read_thread.rs` validates explicit rollout
paths before rollout reading:
https://github.com/openai/codex/blob/25b47c8f425d351aaba4baa955a8092064a1707b/codex-rs/thread-store/src/local/read_thread.rs#L146-L165
- `rollout/src/compression.rs` now requires file metadata for plain and
compressed rollout candidates:
https://github.com/openai/codex/blob/25b47c8f425d351aaba4baa955a8092064a1707b/codex-rs/rollout/src/compression.rs#L940-L950
- The repro test covers the pathless ephemeral side-chat reload case:
https://github.com/openai/codex/blob/25b47c8f425d351aaba4baa955a8092064a1707b/codex-rs/app-server/tests/suite/v2/thread_fork.rs#L774-L886
## Verification
- `just test -p codex-app-server
pathless_ephemeral_thread_rejects_codex_home_path_after_reload`
## Why
Production Codex binaries are stripped for distribution, which leaves
crashes and samples from released builds without the symbols needed for
useful stack traces. Publish symbols as separate release assets so
production artifacts stay small while released builds remain
symbolicateable.
## What changed
- Add `.github/scripts/archive-release-symbols-and-strip-binaries.sh` to
package platform-native symbols into `codex-symbols-<artifact>.tar.gz`
assets while stripping the corresponding Unix binaries before signing.
- Build release binaries with full debug information before producing
distribution artifacts.
- Publish macOS `.dSYM` bundles, Linux `.debug` files with
`.gnu_debuglink`, and Windows `.pdb` files.
- Strip Linux `bwrap` before computing its packaged-resource digest, but
intentionally omit `bwrap` from symbol archives.
- Preserve symbols artifacts in the unsigned macOS promotion flow.
## Verification
- Ran `shellcheck` and `bash -n` on
`.github/scripts/archive-release-symbols-and-strip-binaries.sh`.
- Parsed the modified workflow YAML files and ran `git diff --check`.
- Built a macOS release smoke binary and verified that the archived
`.dSYM` contains DWARF application source information and has the same
UUID as the stripped production binary.
- Built Linux smoke binaries and verified that the symbol archive
contains `codex.debug`, excludes `bwrap.debug`, leaves the expected
`.gnu_debuglink` in `codex`, and does not mutate the separately stripped
`bwrap` digest.
- Staged a Windows smoke archive and verified that it contains the
expected `.pdb` file.
## Why
The TUI shortcut overlay used static labels for `Tab` and `Ctrl+C`, even
though both keys change behavior while a task is running. That made the
visible help misleading: idle `Tab` submits rather than queues, and
active-turn `Ctrl+C` interrupts rather than exits.
Closes#25531.
Closes#25564.
## What Changed
- Pass task-running state into the shortcut overlay renderer.
- Render `Tab` as `submit message` while idle and `queue message` while
work is running.
- Render `Ctrl+C` as `exit` while idle and `interrupt` while work is
running.
- Add snapshot coverage for the active-work shortcut overlay and update
idle overlay snapshots.
## How to Test
1. Start Codex and open the shortcut overlay with `?` while no task is
running.
2. Confirm the overlay shows `tab to submit message` and `ctrl + c to
exit`.
3. Start a task, then open or keep the shortcut overlay visible while
work is running.
4. Confirm the overlay shows `tab to queue message` and `ctrl + c to
interrupt`.
5. Type a follow-up prompt during active work and press `Tab`; confirm
it queues rather than submitting immediately.
Targeted tests:
- `just test -p codex-tui footer_snapshots`
- `just test -p codex-tui footer_mode_snapshots`
## Validation Notes
`just test -p codex-tui` currently has two unrelated guardian
feature-flag test failures on this base:
-
`app::tests::update_feature_flags_disabling_guardian_clears_manual_review_policy_without_history`
-
`app::tests::update_feature_flags_disabling_guardian_clears_review_policy_and_restores_default`
`just argument-comment-lint codex-rs/tui/src/bottom_pane/footer.rs`
could not run locally because the prebuilt wrapper requires `dotslash`;
the touched Rust diff was manually inspected for opaque positional
literals.
Deferred tools need to be searchable even when they are not implemented
inside `codex-core`. Extension-provided tools can be registered for
later discovery, but the search metadata path was still owned by
core-specific runtime hooks, which meant the shared `ToolExecutor`
abstraction could not describe how a deferred extension tool should
appear in `tool_search`.
## Changes
- Move `ToolSearchEntry` and `ToolSearchInfo` into `codex-tools` and
re-export them from the shared tools crate.
- Add a default `ToolExecutor::search_info` implementation that derives
loadable tool-search metadata from function and namespace specs.
- Forward search metadata through extension adapters and exposure
overrides while keeping custom search text/source metadata for dynamic,
MCP, and multi-agent tools.
- Remove the old core-local `tool_search_entry` module now that search
metadata lives with the shared executor APIs.
## Testing
- Added `deferred_extension_tools_are_discoverable_with_tool_search`
coverage in `core/src/tools/spec_plan_tests.rs`.
Migrate the exec-side Windows sandbox override plumbing to pass PermissionProfile plus the split filesystem/network policies instead of accepting a legacy SandboxPolicy.
This keeps the remaining compatibility projection local to the writable-root comparison that still needs it, and removes ExecRequest::compatibility_sandbox_policy without touching the broader config, protocol, app-server, telemetry, or session surfaces from #25450.
## Why
#25701 renamed the app-server test harness to `TestAppServer`, but it
raced with #25681, which added a new `plugin_list` test call site still
using the old `McpProcess` name. Once both changes met on `main`,
app-server test builds failed before running the suite because
`McpProcess` no longer exists in that scope.
This PR fixes that CI break by updating the remaining stale call site to
the renamed helper.
## What Changed
- Replaced the `McpProcess::new(...)` use in
`codex-rs/app-server/tests/suite/v2/plugin_list.rs` with
`TestAppServer::new(...)`.
- Renamed the local variable from `mcp` to `app_server` at the same call
site to match the helper rename.
Relevant code:
https://github.com/openai/codex/blob/aadd9c999b4e0789f7afb2b9b8cc43000bb47e86/codex-rs/app-server/tests/suite/v2/plugin_list.rs#L234-L246
## Verification
Not run locally; this is a compile fix for the app-server test harness
rename.
## Summary
- opt the extension-backed standalone `web.run` tool into parallel tool
execution
- update the existing extension registration test to assert that the
tool advertises parallel-call support
## Why
The standalone web-search API endpoint now supports parallel requests.
The extension executor still inherited the shared serial default,
causing multiple `web.run` calls to acquire the exclusive runtime lock.
## Impact
Models that emit multiple standalone web-search calls can now execute
them concurrently when model-level parallel tool calls are enabled.
## Validation
- `just fmt`
- `just test -p codex-web-search-extension`
- `git diff --check origin/main...HEAD`
Migrate the exec-side Windows sandbox override plumbing to pass PermissionProfile plus the split filesystem/network policies instead of accepting a legacy SandboxPolicy.
This keeps the remaining compatibility projection local to the writable-root comparison that still needs it, and removes ExecRequest::compatibility_sandbox_policy without touching the broader config, protocol, app-server, telemetry, or session surfaces from #25450.
This PR brought to you via VS Code rather than Codex...
- opened `codex-rs/app-server/tests/common/mcp_process.rs`
- put the cursor on `McpServer`
- hit `F2` and renamed the symbol to `TestAppServer`
- went to the file tree
- hit enter and renamed `mcp_process.rs` to `test_app_server.rs`
- ran **Save All Files** from the Command Palette
- ran `just fmt`
The End
(Admittedly, most of the local variables for `TestAppServer` are still
named `mcp`, though.)
This PR brought to you via VS Code rather than Codex...
- opened `codex-rs/app-server/tests/common/mcp_process.rs`
- put the cursor on `McpServer`
- hit `F2` and renamed the symbol to `AppServer`
- went to the file tree
- hit enter and renamed `mcp_process.rs` to `app_server.rs`
The End
This PR brought to you via VS Code rather than Codex...
- opened `codex-rs/app-server/tests/common/mcp_process.rs`
- put the cursor on `McpServer`
- hit `F2` and renamed the symbol to `AppServer`
- went to the file tree
- hit enter and renamed `mcp_process.rs` to `app_server.rs`
The End
Migrate the exec-side Windows sandbox override plumbing to pass PermissionProfile plus the split filesystem/network policies instead of accepting a legacy SandboxPolicy.
This keeps the remaining compatibility projection local to the writable-root comparison that still needs it, and removes ExecRequest::compatibility_sandbox_policy without touching the broader config, protocol, app-server, telemetry, or session surfaces from #25450.
This PR brought to you via VS Code rather than Codex...
- opened `codex-rs/app-server/tests/common/mcp_process.rs`
- put the cursor on `McpServer`
- hit `F2` and renamed the symbol to `AppServer`
- went to the file tree
- hit enter and renamed `mcp_process.rs` to `app_server.rs`
The End
This PR brought to you via VS Code rather than Codex...
- opened `codex-rs/app-server/tests/common/mcp_process.rs`
- put the cursor on `McpServer`
- hit `F2` and renamed the symbol to `AppServer`
- went to the file tree
- hit enter and renamed `mcp_process.rs` to `app_server.rs`
The End
Migrate the exec-side Windows sandbox override plumbing to pass PermissionProfile plus the split filesystem/network policies instead of accepting a legacy SandboxPolicy.
This keeps the remaining compatibility projection local to the writable-root comparison that still needs it, and removes ExecRequest::compatibility_sandbox_policy without touching the broader config, protocol, app-server, telemetry, or session surfaces from #25450.
## Why
Python contributions in this repository should target the declared
Python 3 runtime instead of carrying Python 2 compatibility patterns
forward. When compatibility across Python 3 point releases matters,
contributors need a consistent source of truth for the minimum supported
version.
## What changed
- Added Python development guidance to `AGENTS.md` stating that the
repository uses Python 3+ and should not use the `__future__` module.
- Documented that contributors should check the nearest `pyproject.toml`
`requires-python` field when evaluating Python 3 point-release
compatibility.
## Testing
Not run (guidance-only change).
## Summary
- describe omitted code-mode tools as deferred nested tools instead of
MCP/app tools
- update the prompt-description assertion to match
## Why
Deferred dynamic tools are also callable through `tools` and
discoverable in `ALL_TOOLS`, so the previous MCP/app-specific wording
was too narrow.
## Validation
- `just fmt`
- `just test -p codex-code-mode`
- `git diff --check`
## Why
New unit test modules should follow one consistent layout so
implementation files stay focused and test suites remain easy to locate,
without creating cleanup churn in existing inline test modules.
## What changed
- Added `AGENTS.md` guidance requiring new test modules to use separate
sibling `*_tests.rs` files with an explicit `#[path = "..._tests.rs"]`
attribute.
- Clarified that existing inline `#[cfg(test)] mod tests { ... }`
modules should not be moved solely to follow the new convention.
## Validation
- Ran `git diff --check`.
## Summary
Add counter telemetry for the local rollout compression worker so we can
see when it runs, why it skips, and how individual file/materialization
paths resolve.
## Changes
- Emit `codex.rollout_compression.run` with statuses for start,
completion, failure, duplicate-run skip, and missing runtime skip.
- Emit `codex.rollout_compression.file` outcomes for scanned,
compressed, skipped, and failed compression candidates.
- Emit `codex.rollout_compression.temp_cleanup` and
`codex.rollout_compression.materialize` counters for cleanup and
decompression paths.
## Validation
- `just fmt`
- `just test -p codex-rollout`
- `just fix -p codex-rollout`
## Why
When unified exec is configured to launch through the zsh fork, local
commands should not let the model override the shell binary with the
`shell` parameter. The configured zsh fork is the mechanism that makes
`execv(2)` interception reliable, so exposing `shell` for local zsh-fork
execution would create a confusing API surface and undermine the
composition.
Remote environments are different: zsh-fork interception is local-only,
so remote unified-exec calls must keep direct unified-exec behavior and
still expose `shell` when a remote environment can be selected.
## What Changed
- Taught the `exec_command` schema builder to omit the `shell` parameter
when requested.
- Hid `shell` from the unified-exec tool schema only when zsh-fork
unified exec applies to all selectable environments.
- Kept `shell` visible when any remote environment can be targeted,
because those calls run through direct unified exec.
- Made unified exec choose the effective shell mode per selected
environment: local environments keep zsh-fork mode, remote environments
use direct mode.
- Left direct unified-exec behavior unchanged, including support for
model-specified shells there.
## Verification
- Added schema coverage showing `exec_command` can hide `shell`.
- Added planner coverage showing zsh-fork unified exec hides `shell` for
local-only execution while direct unified exec still exposes it.
- Added planner coverage showing `shell` remains visible when a remote
environment is available.
- Added handler coverage showing remote environments use direct
unified-exec shell mode instead of zsh-fork mode.
- Ran the focused `codex-core` shell-parameter and zsh-fork tests.
---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/openai/codex/pull/24980).
* #24982
* #24981
* __->__ #24980
## Why
`shell_zsh_fork` and unified exec need to remain independently
controllable for enterprise rollouts, but we also need a third mode that
composes them. That composed mode is intended to preserve unified exec
command lifecycle support while letting the zsh fork provide more
accurate `execv(2)` interception.
Enabling `unified_exec_zsh_fork` by itself is intentionally not
sufficient. It is a composition gate, not a dependency-enabling
shortcut:
- `unified_exec` selects the PTY-backed unified exec tool.
- `shell_zsh_fork` opts into the zsh fork backend.
- `unified_exec_zsh_fork` only allows those two already-enabled modes to
be composed so local zsh unified exec commands can launch through the
zsh fork.
This separation is deliberate. Enterprises and staged rollouts must be
able to enable or disable unified exec and zsh-fork independently. If
`unified_exec_zsh_fork` implied either dependency, then enabling one
under-development composition flag would silently activate a shell
backend that the configured feature set left disabled.
This PR introduces only the configuration and planning gate for that
composition. Existing `shell_zsh_fork` behavior continues to use the
standalone shell tool unless the new composition feature is explicitly
enabled alongside both dependencies.
## What Changed
- Added the under-development feature flag `unified_exec_zsh_fork`.
- Added `UnifiedExecFeatureMode` so the three input feature flags
collapse into `Disabled`, `Direct`, or `ZshFork` mode before tool
planning.
- Updated tool selection so zsh-fork composition requires
`unified_exec`, `shell_zsh_fork`, and `unified_exec_zsh_fork`.
- Kept the existing standalone zsh-fork shell tool behavior when only
`shell_zsh_fork` is enabled.
- Updated config schema output for the new feature flag.
## Verification
- Added feature and tool-config coverage for the new gate.
- Added planner coverage proving `shell_zsh_fork` remains standalone
until composition is explicitly enabled.
- Ran focused tests for `codex-features`, `codex-tools`, and the
affected `codex-core` planner case.
---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/openai/codex/pull/24979).
* #24982
* #24981
* #24980
* __->__ #24979
Michael Bolin