## Summary
- Treat MCP tools with `readOnlyHint: true` as parallel-safe even when
`supports_parallel_tool_calls` is unset or `false`.
- Keep server-level `supports_parallel_tool_calls` as an additive
override for non-read-only tools.
- Add focused unit coverage for the MCP handler eligibility decision.
- Update RMCP integration coverage to keep the serial baseline on a
mutable tool, verify read-only concurrency without server opt-in, and
preserve the server opt-in concurrency path separately.
## Testing
- `just fmt`
- `cargo test -p codex-core --lib tools::handlers::mcp::tests::`
- `cargo test -p codex-core --test all
stdio_mcp_read_only_tool_calls_run_concurrently_without_server_opt_in`
- `cargo test -p codex-core --test all
stdio_mcp_parallel_tool_calls_opt_in_runs_concurrently`
- `cargo test -p codex-rmcp-client`
## Why
Extension tools that need conversation context should be able to read it
from the live tool invocation instead of reaching into thread
persistence themselves.
## What changed
- Add a `ConversationHistory` snapshot to extension `ToolCall`s and
populate it from the current raw in-memory response history.
- Expose all history items at this boundary so each extension can filter
and bound the subset it needs before consuming or forwarding it.
- Cover the adapter and registry dispatch paths and update existing
extension tests that construct `ToolCall` literals.
## Test plan
- `cargo test -p codex-tools`
- `cargo test -p codex-extension-api`
- `cargo test -p codex-goal-extension`
- `cargo test -p codex-memories-extension`
- `cargo test -p codex-core passes_turn_fields_to_extension_call`
- `cargo test -p codex-core
extension_tool_executors_are_model_visible_and_dispatchable`
# What
When a normal hook fires inside a thread-spawned subagent, Codex now
includes these optional top-level fields in the hook input:
- `agent_id`: the child thread id
- `agent_type`: the subagent role
Root-agent hook inputs omit these fields. `SubagentStart` and
`SubagentStop` keep their existing required `agent_id` and `agent_type`
fields because those events are inherently subagent-scoped.
This does not change matcher behavior. Tool hooks still match on tool
name, compact hooks still match on trigger, and `UserPromptSubmit` still
ignores matchers. Only `SubagentStart` and `SubagentStop` match on
`agent_type`.
# Why
This is a follow-up stacked on top of the `plugin_hooks` default-on
change. Once we are comfortable making plugin hooks part of the normal
plugin behavior, the separate feature flag stops buying us much and
leaves extra branching/cache state behind.
# What
- remove the `PluginHooks` feature and generated config-schema entries
- make plugin hook loading/listing follow plugin enablement directly
- drop plugin-manager cache/state that only existed to distinguish
hook-flag toggles
- remove tests and fixtures that modeled `plugin_hooks = true/false`
## Summary
- route each configured MCP server through an explicit per-server
`environment_id` instead of a manager-wide remote toggle
- default omitted `environment_id` to `local`, resolve named ids through
`EnvironmentManager`, and fail only the affected MCP server when an
explicit id is unknown
- keep local stdio on the existing local launcher path for now, while
named-environment stdio uses the selected environment backend and
requires an absolute `cwd`
- allow local HTTP MCP servers to keep using the ambient HTTP client
when no local `Environment` is configured; named-environment HTTP MCPs
use that environment's HTTP client
## Validation
- devbox Bazel build: `bazel build --bes_backend= --bes_results_url=
//codex-rs/cli:codex //codex-rs/rmcp-client:test_stdio_server
//codex-rs/rmcp-client:test_streamable_http_server`
- devbox app-server config matrix with real `config.toml` /
`environments.toml` files covering omitted local, explicit local,
omitted local under remote default, explicit remote stdio, local HTTP
without local env, explicit remote HTTP, local stdio without local env,
unknown explicit env, and remote stdio without `cwd`
## Why
Profile v2 is taking over the user-facing profile selection path, so the
CLI no longer needs to expose the transitional `--profile-v2` spelling.
This switches the public args surface to `--profile` before the
remaining legacy profile plumbing is removed separately.
## What
- Rebind `--profile` and `-p` to the v2 profile name argument that
selects `$CODEX_HOME/<name>.config.toml`.
- Stop parsing the legacy shared CLI profile argument while keeping its
implementation path in place for follow-up cleanup.
- Update CLI validation, profile-name parse errors, and the
legacy-profile collision message/tests to refer to `--profile`.
## Testing
- `cargo test -p codex-cli -p codex-config -p codex-protocol -p
codex-utils-cli`
## Why
Tool exposure is a planning concern, but the deferred MCP path and
dispatch-only legacy shell path were carrying those decisions in handler
constructors and a shell-only tool-family builder. Keeping those
decisions in `spec_plan` makes the core tool plan easier to follow and
keeps handlers focused on runtime behavior.
## What changed
- add `PlannedTools` helpers for ordinary runtimes, exposure overrides,
dispatch-only runtimes, and hosted specs
- inline shell tool assembly into `core/src/tools/spec_plan.rs` and
remove the shell-only `tool_family` module
- remove exposure state and special exposure constructors from
`McpHandler` and `ShellCommandHandler`
- keep hidden runtime behavior centralized in `ExposureOverride`,
including disabling parallel tool calls for hidden handlers
## Testing
- Not run (refactor only)
## What
Remove the exact captured request-count assertion from the
`SubagentStart` hook integration test while still waiting for the child
request that matches the injected hook context.
## Why
The test owns the start-hook behavior and already verifies that the
child request reaches the context matcher plus that the start/session
hook logs have the expected invocations. Counting every request captured
by the response mock makes the test sensitive to lifecycle timing
outside that contract and has been flaky in CI.
## Testing
- `cargo test -p codex-core --test all
suite::subagent_notifications::subagent_start_replaces_session_start_and_injects_context
-- --exact`
## Why
`ToolExecutor` is the runtime contract that keeps a callable tool and
its model-visible spec together. Leaving `spec()` optional lets a
registered runtime silently omit that half of the contract, and it also
overloads a missing spec as an exposure decision for tools that should
stay dispatchable without being shown to the model.
## What
- Make `ToolExecutor::spec()` required and update core, extension, and
test tool executors to return a concrete `ToolSpec`.
- Add `ToolExposure::Hidden` for dispatch-only tools. The legacy
`shell_command` runtime in unified-exec sessions now uses that explicit
exposure instead of hiding itself by omitting a spec.
- Build MCP tool specs when `McpHandler` is constructed so invalid MCP
specs are skipped before the handler is registered.
- Keep tool planning aligned with the new contract for direct, deferred,
hidden, code-mode, dynamic, and namespaced tool paths.
## Testing
- Added tool-plan coverage that invalid MCP tool specs are not
registered.
- Updated shell-family coverage for the hidden legacy `shell_command`
runtime and the affected tool executor test fixtures.
## Why
Remote compaction now has two implementations: the existing
server-rebuilt v1 path and the newer client-rebuilt v2 path behind
`remote_compaction_v2`. The v1 path bounds retained
user/developer/system history before installing the compaction item,
while v2 was previously carrying the full retained history forward. That
made the two paths diverge for large pre-compaction transcripts even
though they are meant to preserve the same compaction contract.
This aligns v2 with the retained-history budget expected from v1 so
switching the feature flag does not materially change which
pre-compaction messages survive into the rebuilt history.
## What changed
- Apply a retained-message character budget while rebuilding v2
compacted history in `core/src/compact_remote_v2.rs`.
- Keep newest retained messages first, truncate the boundary message
with the shared `truncate_text(...)` helper, and drop older retained
messages once the budget is exhausted.
- Preserve non-text retained message content such as images while
truncating text content.
- Use the current `64_000` token retained-message default translated to
the existing `4x` character budget.
## Testing
- `cargo test -p codex-core compact_remote_v2::tests::`
- Added focused coverage for newest-first retention and truncating
multipart retained messages without dropping images.
## What
- Add a small extension capability for injecting model-visible response
items into the active turn
- Have the goal extension inject hidden goal-context steering when
tool-finish accounting reaches `BudgetLimited`
- Cover the extension backend path with an assertion on the injected
steering item
## Why
PR #23696 persists and emits the budget-limited goal update from
tool-finish accounting, but it leaves the model unaware of that
transition. The existing core runtime steers the model to wrap up in
this case; the extension path should do the same through an explicit
host capability.
## Testing
- `just fmt`
- `cargo test -p codex-goal-extension`
- `cargo test -p codex-extension-api`
## Why
`prewarm_websocket` intentionally stays out of rollout inference
tracing, but the next traced websocket request can still reuse the
warmup `response_id` and send an empty `input` delta. If tracing records
that wire payload verbatim, replay sees an incremental request whose
parent was never traced and cannot reconstruct the conversation.
This fixes that at the producer boundary instead of relaxing
`rollout-trace` replay semantics around unresolved
`previous_response_id` values.
## What
- track whether the last websocket response came from an untraced warmup
and clear that state when the websocket session is reset or reconnected
- when a traced websocket request reuses that warmup parent, keep
sending the compressed websocket request on the wire but record the
logical `ResponsesApiRequest` in the rollout trace
- add a regression test that proves replay reconstructs the logical user
message even though the websocket follow-up carries
`previous_response_id = warm-1` with empty `input`
- update `InferenceTraceAttempt::record_started` docs to reflect that
callers may record a logical request rather than the exact transport
payload
## Testing
- `cargo test -p codex-core --test all
responses_websocket_request_prewarm_traces_logical_request`
## Why
This is the functional handoff PR for the Windows sandbox
`PermissionProfile` migration. After #23714, the Windows elevated
backend can accept a profile-native request, but core still sent a
compatibility `SandboxPolicy` into the elevated command-runner path.
That meant profile-only details such as deny globs had to be translated
through side channels instead of being preserved in the runner
`SpawnRequest`.
Passing the real `PermissionProfile` completes the command-runner
handoff while leaving the unelevated restricted-token fallback on the
legacy policy-string API.
## What
- Updates one-shot Windows elevated execution in `core/src/exec.rs` to
call `run_windows_sandbox_capture_for_permission_profile_elevated`.
- Updates unified exec in `core/src/unified_exec/process_manager.rs` to
call `spawn_windows_sandbox_session_elevated_for_permission_profile`.
- Passes `request.permission_profile` /
`exec_request.permission_profile` and the stored Windows sandbox policy
cwd to the elevated backend.
- Keeps compatibility `SandboxPolicy` serialization only for the
non-elevated restricted-token fallback.
## Verification
- `cargo test -p codex-core --test all --no-run`
## Why
Cloud-managed `requirements.toml` should be able to define the managed
permission profiles a client may select and constrain that selectable
set without requiring local user config to recreate the profile catalog.
This keeps requirements focused on restrictions. The selected default
remains a config or session choice, while requirements contribute the
managed profile bodies and `allowed_permissions` allowlist that the
config-loading boundary validates before a resolved runtime
`PermissionProfile` is installed.
## What changed
- Add `requirements.toml` support for a managed permission-profile
catalog plus its allowlist:
```toml
allowed_permissions = ["review", "build"]
[permissions.review]
extends = ":read-only"
[permissions.build]
extends = ":workspace"
```
- Merge requirements-defined profile bodies into the effective
permission catalog and reject profile ids that collide with
config-defined profiles.
- Validate that every `allowed_permissions` entry resolves to a built-in
or catalog profile before selection uses it.
- Preserve allowed configured named-profile selections. When a
configured named profile is disallowed, fall back to the first allowed
requirements profile with a startup warning.
- Keep built-in selections and the stock trust-based `:read-only` /
`:workspace` fallback path intact when no permission profile is
explicitly selected.
- Centralize the managed catalog and allowlist selection path in
`EffectivePermissionSelection` so the requirements boundary is visible
in config loading.
- Surface `allowedPermissions` through `configRequirements/read`, and
update the generated app-server schema fixtures plus the app-server
README.
## Validation
- `cargo test -p codex-config`
- `cargo test -p codex-core system_requirements_`
- `cargo test -p codex-core system_allowed_permissions_`
- `cargo test -p codex-app-server-protocol`
- `just write-app-server-schema`
## Related work
- Uses merged permission-profile inheritance support from #22270 and
#23705.
- Kept separate from the in-flight permission profile listing API in
#23412.
## Why
If a user configures `approval_policy = "never"` with `sandbox_mode =
"danger-full-access"`, managed requirements can reject full access and
force the existing permission fallback to read-only. That leaves Codex
in a dead-end session: writes are blocked by the sandbox, while
approvals are disabled so the session cannot ask to proceed.
This PR rejects that constrained configuration during startup instead of
letting the TUI enter a read-only session that cannot make progress. The
rejection is attached to the requirement-constrained permission path in
[`Config`](39f0abc0a7/codex-rs/core/src/config/mod.rs (L3301-L3318)).
## What changed
- Reject the `danger-full-access` to read-only managed-requirements
fallback when the effective approval policy is `never`.
- Explain in the startup config error why the fallback is invalid and
how to fix it.
- Add a regression test for the managed requirements path.
## Stack
1. Parent PR: #18868 adds MITM hook config and model only.
2. Parent PR: #20659 wires hook enforcement into the proxy request path.
3. This PR changes the user facing PermissionProfile TOML shape.
## Why
1. The broader goal is to make MITM clamping usable from the same
permission profile that already controls network behavior.
2. This PR is the config UX layer for the stack. It moves MITM policy
into `[permissions.<profile>.network.mitm]` instead of exposing the flat
runtime shape to users.
3. The named hook and action tables belong here because users need
reusable policy blocks that are easy to review, while the proxy runtime
only needs a flat hook list.
4. This PR validates action refs during config parsing so mistakes in
the user facing policy fail before a proxy session starts.
5. Keeping the lowering here lets the proxy keep its simpler runtime
model and lets PermissionProfile remain the single source of network
permission policy.
## Summary
1. Keep MITM policy inside `[permissions.<profile>.network.mitm]` so the
selected PermissionProfile owns network proxy policy.
2. Use named MITM hooks under
`[permissions.<profile>.network.mitm.hooks.<name>]`.
3. Put host, methods, path prefixes, query, headers, body, and action
refs on the hook table.
4. Define reusable action blocks under
`[permissions.<profile>.network.mitm.actions.<name>]`.
5. Represent action blocks with `NetworkMitmActionToml`, then lower them
into the proxy runtime action config.
6. Reject unknown refs, empty refs, and empty action blocks during
config parsing.
7. Keep the runtime hook model unchanged by lowering config into the
existing proxy hook list.
8. Preserve the #20659 activation fix for nested MITM policy.
## Example
```toml
[permissions.workspace.network.mitm]
enabled = true
[permissions.workspace.network.mitm.hooks.github_write]
host = "api.github.com"
methods = ["POST", "PUT"]
path_prefixes = ["/repos/openai/"]
action = ["strip_auth"]
[permissions.workspace.network.mitm.actions.strip_auth]
strip_request_headers = ["authorization"]
```
## Validation
1. Regenerated the config schema.
2. Ran the core MITM config parsing and validation tests.
3. Ran the core PermissionProfile MITM proxy activation tests.
4. Ran the core config schema fixture test.
5. Ran the network proxy MITM policy tests.
6. Ran the scoped Clippy fixer for the network proxy crate.
7. Ran the scoped Clippy fixer for the core crate.
---------
Co-authored-by: Winston Howes <winston@openai.com>
Add owning plugin id to MCP tool call items so we can better filter them
at plugin level.
## Summary
- add optional `plugin_id` to MCP tool-call items and legacy begin/end
events
- propagate plugin metadata into emitted core items and app-server v2
`ThreadItem::McpToolCall`
- preserve plugin ids through app-server replay/redaction paths and
regenerate v2 schema fixtures
## Testing
- `just write-app-server-schema`
- `just fmt`
- `just fix -p codex-core`
- `cargo test -p codex-protocol -p codex-app-server-protocol`
- `cargo test -p codex-app-server-protocol`
- `cargo test -p codex-core mcp_tool_call_item_includes_plugin_id --lib`
- `cargo check -p codex-tui --tests`
- `cargo check -p codex-app-server --tests`
- `git diff --check`
## Notes
- `just fix -p codex-core` completed with two non-fatal
`too_many_arguments` warnings on the touched MCP notification helpers.
- A broader `cargo test -p codex-core` run passed core unit tests, then
hit shell/sandbox/snapshot failures in the integration target.
- A broader app-server downstream run hit the existing
`in_process::tests::in_process_start_clamps_zero_channel_capacity` stack
overflow; `cargo test -p codex-exec` also hit the existing sandbox
expectation mismatch in
`thread_lifecycle_params_include_legacy_sandbox_when_no_active_profile`.
## Why
Realtime v1 websocket sessions now expect a slightly different boundary
shape for text input, completed input transcripts, and connection
headers. Codex was still using the older shape, so some v1 text appends
could be rejected before the existing conversation flow could handle
them.
## What changed
- Send v1 user text items with `input_text` content
- Accept v1 turn-marked input transcript events as completed transcripts
- Add the v1 alpha header only for v1 realtime sessions
- Cover the outbound text shape, transcript parsing, and versioned
headers
## Test plan
- `cargo test -p codex-api endpoint::realtime_websocket::methods::tests`
- `cargo test -p codex-core quicksilver_alpha_header`
## Why
Model catalog responses can now advertise a nullable
`default_service_tier` for each model. Codex needs to preserve three
distinct states all the way from config/app-server inputs to inference:
- no explicit service tier, so the client may apply the current model
catalog default when FastMode is enabled
- explicit `default`, meaning the user intentionally wants standard
routing
- explicit catalog tier ids such as `priority`, `flex`, or future tiers
Keeping those states distinct prevents the UI from showing one tier
while core sends another, especially after model switches or app-server
`thread/start` / `turn/start` updates.
## What Changed
- Plumbed `default_service_tier` through model catalog protocol types,
app-server model responses, generated schemas, model cache fixtures, and
provider/model-manager conversions.
- Added the request-only `default` service tier sentinel and normalized
legacy config spelling so `fast` in `config.toml` still materializes as
the runtime/request id `priority`.
- Moved catalog default resolution to the TUI/client side, including
recomputing the effective service tier when model/FastMode-dependent
surfaces change.
- Updated app-server thread lifecycle config construction so
`serviceTier: null` preserves explicit standard-routing intent by
mapping to `default` instead of internal `None`.
- Kept core responsible for validating explicit tiers against the
current model and stripping `default` before `/v1/responses`, without
applying catalog defaults itself.
## Validation
- `CARGO_INCREMENTAL=0 cargo build -p codex-cli`
- `CARGO_INCREMENTAL=0 cargo test -p codex-app-server model_list`
- `cargo test -p codex-tui service_tier`
- `cargo test -p codex-protocol service_tier_for_request`
- `cargo test -p codex-core get_service_tier`
- `RUST_MIN_STACK=8388608 CARGO_INCREMENTAL=0 cargo test -p codex-core
service_tier`
## Why
The `goals` feature is ready to be available without requiring users to
opt into experimental features. Keeping it behind the beta flag leaves
persisted thread goals and automatic goal continuation disabled by
default.
This PR also marks the goal-related app server APIs and events as no
longer experimental.
## What changed
- Mark `goals` as `Stage::Stable`.
- Enable `goals` by default in `codex-rs/features/src/lib.rs`.
# What
<img width="1792" height="1024" alt="image"
src="https://github.com/user-attachments/assets/8f81d232-5813-4994-a61d-e42a05a93a3e"
/>
`SubagentStop` runs when a thread-spawned subagent turn is about to
finish. Thread-spawned subagents use `SubagentStop` instead of the
normal root-agent `Stop` hook.
Configured handlers match on `agent_type`. Hook input includes the
normal stop fields plus:
- `agent_id`: the child thread id.
- `agent_type`: the resolved subagent type.
- `agent_transcript_path`: the child subagent transcript path.
- `transcript_path`: the parent thread transcript path.
- `last_assistant_message`: the final assistant message from the child
turn, when available.
- `stop_hook_active`: `true` when the child is already continuing
because an earlier stop-like hook blocked completion.
`SubagentStop` shares the same completion-control semantics as `Stop`,
scoped to the child turn:
- No decision allows the child turn to finish.
- `decision: "block"` with a non-empty `reason` records that reason as
hook feedback and continues the child with that prompt.
- `continue: false` stops the child turn. If `stopReason` is present,
Codex surfaces it as the stop reason.
# Lifecycle Scope
Only thread-spawned subagents run `SubagentStop`.
Internal/system subagents such as Review, Compact, MemoryConsolidation,
and Other do not run normal `Stop` hooks and do not run `SubagentStop`.
This avoids exposing synthetic matcher labels for internal
implementation paths.
# Stack
1. #22782: add `SubagentStart`.
2. This PR: add `SubagentStop`.
3. #22882: add subagent identity to normal hook inputs.
## Why
Once a named permission profile is selected, runtime state has to keep
that profile identity intact instead of collapsing back to anonymous
effective permissions. The session refresh path also needs to rebuild
profile-derived network proxy state so active profile switches take
effect consistently.
## What changed
- Preserve the active permission profile through session updates.
- Rebuild profile-derived runtime/network configuration when the active
profile changes.
- Keep the runtime path aligned with the current session configuration
APIs.
- Tighten the affected tests, including the Windows delete-pending
memory-file case that was intermittently tripping CI.
## Stack
1. **This PR**: runtime/session/network propagation for active
permission profiles.
2. [#23708](https://github.com/openai/codex/pull/23708): TUI selection
plumbing and guardrail flow.
3. [#21559](https://github.com/openai/codex/pull/21559): profile-aware
`/permissions` menu and custom profile display.
<img width="1296" height="906" alt="image"
src="https://github.com/user-attachments/assets/077fa3a7-80cb-4925-80b1-d2395018d90a"
/>
## Why
This is the next step in the Windows sandbox migration away from the
legacy `SandboxPolicy` abstraction. #22923 moved write-root and token
decisions onto `ResolvedWindowsSandboxPermissions`, but setup and
identity still accepted `SandboxPolicy` and converted internally. This
PR pushes that conversion outward so the setup path consumes the
resolved Windows permission view directly.
## What Changed
- Changed `SandboxSetupRequest` to carry
`ResolvedWindowsSandboxPermissions` instead of `SandboxPolicy` plus
policy cwd.
- Updated setup refresh/elevation and identity credential preparation to
use resolved permissions for read roots, write roots, network identity,
and deny-write payload planning.
- Removed the production `allow.rs` legacy wrapper; allow-path
computation now takes resolved permissions directly.
- Added a permissions-based world-writable audit entry point while
keeping the existing legacy wrapper for compatibility.
- Updated legacy ACL setup and the core Windows setup bridge to
construct resolved permissions at the boundary.
- Hardened the Windows sandbox integration test helper staging so Bazel
retries can reuse an already-staged helper if a prior sandbox helper
process still has the executable open.
## Verification
- `cargo test -p codex-windows-sandbox`
- `cargo test -p codex-core --test all --no-run`
- `just fix -p codex-windows-sandbox`
- `just fix -p codex-core`
- Attempted `cargo check -p codex-windows-sandbox --target
x86_64-pc-windows-gnullvm`, but the local machine is missing
`x86_64-w64-mingw32-clang`; Windows CI should cover that target.
---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/openai/codex/pull/23167).
* #23715
* #23714
* __->__ #23167
## Why
This is the third PR in the Windows sandbox `SandboxPolicy` ->
`PermissionProfile` migration stack.
#22896 introduced `ResolvedWindowsSandboxPermissions`, and #22918 moved
elevated runner IPC to carry `PermissionProfile`. This PR starts moving
the remaining setup/spawn helpers away from asking legacy enum questions
like “is this `WorkspaceWrite`?” and toward resolved runtime permission
questions like “does this profile require write capability roots?”
## What changed
- Added resolved-permissions helpers for network identity and
write-capability detection.
- Moved setup write-root gathering to operate on
`ResolvedWindowsSandboxPermissions`, with the legacy `SandboxPolicy`
wrapper left in place for existing call sites.
- Updated identity setup, elevated capture setup, and world-writable
audit denies to use resolved write roots.
- Updated spawn preparation to carry resolved permissions in
`SpawnContext` and use them for network blocking, setup write roots,
elevated capability SID selection, and legacy capability roots.
- Removed a now-unused legacy write-root helper.
## Verification
- `cargo test -p codex-windows-sandbox`
- `just fix -p codex-windows-sandbox`
- Existing stack checks are green on #22896 and #22918; CI has started
for this PR.
---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/openai/codex/pull/22923).
* #23715
* #23714
* #23167
* __->__ #22923
# Why
Compaction replaces the live conversation history, so hooks that use
`SessionStart` to re-inject durable model context need a way to run
again after that rewrite.
Related - #19905 adds dedicated compact lifecycle hooks
# What
- add `compact` as a supported `SessionStart` source and matcher value
- change pending `SessionStart` state from a single slot to a small FIFO
queue so `resume` / `startup` / `clear` can be preserved alongside a
later `compact`
- drain all queued `SessionStart` sources before the next model request,
preserving their original order
# Testing
The new integration coverage verifies both the basic `compact` matcher
path and the stacked `resume` -> `compact` case where both hooks
contribute `additionalContext` to the next model turn.
## Stack
This is the foundation PR for the permission-profile inheritance stack.
- This PR adds config-level `extends` resolution and merge semantics.
- Follow-up: #23705 applies resolved profiles at runtime and updates the
active-profile protocol surfaces.
## Why
Permission profiles are starting to carry enough policy that
copy-pasting near-identical definitions becomes hard to review and easy
to drift. Before the runtime can consume inherited profiles, the config
layer needs one explicit resolver that can merge parent chains and
reject unsafe or invalid inheritance shapes.
## What changed
- Add `extends` to permission-profile TOML and resolve parent chains in
inheritance order.
- Merge inherited profile TOML with the existing config merge behavior
while preserving the permission-specific normalization needed for
network domain keys.
- Keep parent descriptions out of resolved child profiles and record
inherited profile names separately for downstream consumers.
- Reject undefined parents, unsupported built-in parents, and
inheritance cycles with targeted errors.
- Cover resolver behavior with TOML fixture tests and refresh the
generated config schema.
## Validation
- `cargo test -p codex-config`
- `cargo test -p codex-core permissions_profiles_`
## Stack
1. This PR adds MITM hook config and model only.
2. Runtime follow up: #20659 wires hook enforcement into the proxy
request path.
3. User facing config follow up: #18240 moves MITM policy into the
PermissionProfile network tree.
## Why
1. Viyat asked for the original parent PR to be split so reviewers can
inspect the policy model before request behavior changes.
2. This PR gives the proxy a typed MITM hook model, validation, matcher
compilation, permissions TOML plumbing, schema support, and config
tests.
3. This PR deliberately does not change CONNECT or MITM request
handling.
4. Keeping runtime behavior out of this PR makes the review boundary
simple: does the policy model parse, validate, compile, and lower
correctly.
## Summary
1. Add the MITM hook config model and matcher compilation.
2. Validate hosts, methods, paths, query matchers, header matchers,
secret sources, and reserved body matching.
3. Add wildcard matcher support for path, query value, and header value
matching.
4. Add permissions TOML and schema support for flat runtime hook config.
5. Add config loader tests for MITM hook overlay behavior.
## Validation
1. Regenerated the config schema.
2. Ran the network proxy MITM hook unit tests.
3. Ran the core permission profile MITM hook parsing tests.
4. Ran the core config schema fixture test.
5. Ran the scoped Clippy fixer for the network proxy crate.
6. Ran the scoped Clippy fixer for the core crate.
## Notes
1. Runtime enforcement moved to #20659.
2. User facing PermissionProfile TOML shape remains in #18240.
## Why
Extension-owned tools currently receive a stripped `ToolCall` with only
`call_id`, `tool_name`, and `payload`.
That makes extension work that needs turn-local execution context
awkward, especially web-search extension work that needs the active
`truncation_policy` at tool invocation time.
Reconstructing that value from config or `ExtensionData` would be
indirect and could drift from the actual turn context, so the cleaner
fix is to pass the needed turn metadata directly on the extension-facing
invocation type.
## What changed
- added `turn_id` and `truncation_policy` to `codex_tools::ToolCall`
- populated those fields when core adapts `ToolInvocation` into an
extension tool call
- added a focused adapter test that verifies extension executors receive
the forwarded turn metadata
- updated the memories extension tests to construct the richer
`ToolCall`
- added the `codex-utils-output-truncation` dependency to `codex-tools`
and refreshed lockfiles
## Testing
- `cargo test -p codex-tools`
- `cargo test -p codex-memories-extension`
- `cargo test -p codex-core passes_turn_fields_to_extension_call`
- `just bazel-lock-update`
- `just bazel-lock-check`
## Why
The goal extension can create and surface goals, but the live
turn-accounting path still stopped short of persisting active-goal
progress. That leaves token and wall-clock usage, plus
`ThreadGoalUpdated` events, out of sync with the extension boundary once
work actually advances or a goal transitions out of active state.
## What changed
- Teach `GoalAccountingState` to track the current turn, active goal,
token deltas, and wall-clock progress snapshots against the persisted
goal id.
- Flush active-goal accounting from tool-finish, turn-stop, and
turn-abort lifecycle hooks, and emit `ThreadGoalUpdated` events when
persisted progress changes.
- Route `create_goal` and `update_goal` through the same accounting
state so new goals start from the right baseline, final progress is
flushed before status changes, and `update_goal` can mark a goal
`blocked` as well as `complete`.
- Keep budget-limited goals accruing through the end of the turn while
clearing local active-goal state once a turn or explicit update is
finished.
- Expand backend and lifecycle coverage around store ids, baseline
reset, tool-finish accounting, budget-limited carry-through, and
blocked-goal updates.
## Testing
- Added focused backend coverage in
`codex-rs/ext/goal/tests/goal_extension_backend.rs` for baseline reset,
tool-finish accounting, budget-limited turns, and blocked-goal updates.
- Extended `codex-rs/core/src/session/tests.rs` to assert that lifecycle
inputs expose the expected session, thread, and turn store ids.
## Why
`code_mode_only_guides_all_tools_search_and_calls_deferred_app_tools`
was failing because code-mode prompt generation used the same nested
tool spec list for both the model-visible `exec` guide and the runtime
`ALL_TOOLS` surface. That allowed deferred MCP/app tools, such as
`calendar_timezone_option_99`, to leak into the `exec` description even
though they should only be discoverable through `ALL_TOOLS` at runtime.
## What changed
Split code-mode nested tool planning into two sets in
`core/src/tools/spec_plan.rs`:
- runtime nested tool specs still include deferred tools, so
`tools[...]` and `ALL_TOOLS` can call them
- `exec` prompt docs only render non-deferred tools, so deferred app
tools stay out of the model-visible guide
## Validation
- `cargo test -p codex-core --test all
code_mode_only_guides_all_tools_search_and_calls_deferred_app_tools --
--nocapture`
- looped the same focused test 5 additional times with `cargo test -q -p
codex-core --test all
code_mode_only_guides_all_tools_search_and_calls_deferred_app_tools`
## Why
The goal extension needs more context when a turn starts than
`turn_store` alone provides.
In particular, goal accounting needs the stable turn id, the effective
collaboration mode, and the cumulative token-usage baseline captured at
turn start so it can:
- suppress goal accounting for plan-mode turns
- compute exact per-turn deltas from cumulative `total_token_usage`
snapshots instead of relying on the most recent usage event alone
- keep the extension-owned accounting path aligned with the host turn
lifecycle
## What
- extend `codex_extension_api::TurnStartInput` to expose `turn_id`,
`collaboration_mode`, and `token_usage_at_turn_start`
- pass the full `TurnContext` plus the captured token-usage baseline
through the turn-start lifecycle emission path
- initialize goal turn accounting from the turn-start baseline and
collaboration mode
- switch goal token accounting to compute deltas from cumulative
`total_token_usage` snapshots
- add coverage for the new turn-start lifecycle fields and for
goal-accounting baseline behavior
## Testing
- added `turn_start_lifecycle_exposes_turn_metadata_and_token_baseline`
in `codex-rs/core/src/session/tests.rs`
- added `ext/goal/tests/accounting.rs` coverage for baseline-aware goal
accounting and plan-mode suppression
## Why
Remote compaction currently sends a unary `POST /responses/compact` and
waits for the full response before replacing history or emitting the
completed `ContextCompaction` item. Unlike normal `/responses` streaming
requests, this unary compact request had no timeout boundary. If the
backend accepts the request and then stalls before returning a body, the
existing request retry policy never sees a transport error, so the
compact turn can remain stuck after the started item with no completion
or actionable error.
That matches the reported hang shape in issues such as #18363, where
logs show `responses/compact` was posted but no corresponding compact
completion followed. A bounded request timeout gives the existing retry
policy a concrete timeout error to retry instead of letting the user sit
indefinitely on automatic context compaction.
## What
- Add a request timeout to legacy `/responses/compact` calls.
- Size that timeout from the provider stream idle timeout with a
conservative multiplier, so the default compact attempt gets 20 minutes
rather than the 5 minute stream idle window.
- Map API transport timeouts to a request timeout error instead of the
child-process timeout message.
## Testing
- Not run (per request; CI will cover).
## Summary
- migrate exec-server remote registration naming from executor to
environment
- align CLI, public Rust exports, registry error messages, and relay
test fixtures with the environment registry contract
- keep the live registration path and response model consistent with
`/cloud/environment/{environment_id}/register`
## Verification
- `cargo test -p codex-exec-server
remote::tests::register_environment_posts_with_auth_provider_headers
--manifest-path /Users/richardlee/code/codex/codex-rs/Cargo.toml`
- `cargo test -p codex-exec-server --test relay
multiplexed_remote_environment_routes_independent_virtual_streams
--manifest-path /Users/richardlee/code/codex/codex-rs/Cargo.toml`
- `cargo check -p codex-cli --manifest-path
/Users/richardlee/code/codex/codex-rs/Cargo.toml` (still running when PR
opened; will update after completion if needed)
add new `EncryptedContent` variant to `FunctionCallOutputContentItem`
ahead of standalone websearch.
we need to be able to receive and pass encrypted function call output
from the new web search endpoint back to responsesapi, as we cannot
expose direct search results.
Fixes#23223.
## Why
Malformed AGENTS instructions should not fail silently. The reported
issue had invalid UTF-8 in a global `AGENTS.md`; before this change,
Codex treated that decode failure like a missing file, so the personal
instructions disappeared without a user-visible explanation and the
rollout had no `# AGENTS.md instructions` block.
Project-level AGENTS files already used lossy decoding, so their
instructions still appeared, but invalid bytes were replaced without
telling the user. Global and project AGENTS files should behave
consistently: keep usable instruction text when possible, and surface a
diagnostic when bytes had to be replaced.
## What changed
Global `AGENTS.override.md` and `AGENTS.md` loading now reads bytes and
decodes with replacement characters on invalid UTF-8, matching
project-level AGENTS behavior. Both global and project AGENTS loading
now emit a startup warning when invalid UTF-8 is found, and both keep
the instruction text with invalid byte sequences replaced.
Missing files, non-file candidates, empty files, and the existing
`AGENTS.override.md` before `AGENTS.md` precedence keep their current
behavior.
## How users see it
The warnings flow through the existing startup warning surface.
App-server clients receive config-time startup warnings as
`configWarning` notifications during initialization, and thread startup
emits startup warnings as thread-scoped `warning` notifications.
Global AGENTS invalid UTF-8 warnings can appear on both surfaces.
Project-level AGENTS invalid UTF-8 warnings are discovered while
building thread instructions, so they appear as thread-scoped `warning`
notifications. Clients that render warning notifications in the
conversation surface show the message as a visible diagnostic instead of
silently hiding or altering instructions.
## Why
Code mode can use nested unified exec calls as data sources. When those
calls omit `max_output_tokens`, code mode should receive raw command
output so the script can parse or summarize it itself. When code mode
does provide `max_output_tokens`, that explicit nested budget should be
respected, including values above the default unified exec limit, rather
than being capped before code mode sees the result.
## What
- Preserve direct unified exec truncation behavior, while letting
code-mode exec/write_stdin keep `max_output_tokens` as `None` unless
explicitly supplied.
- Make code-mode tool results use raw output when no explicit limit is
present, and use the explicit nested limit directly when one is
specified.
- Refactor unified exec output formatting so `truncated_output` takes
the caller-selected token budget.
- Add e2e integration coverage for explicit nested exec limits, omitted
nested exec limits, outer exec limit propagation, omitted-limit outputs
that exceed both the default and a small truncation policy, explicit
nested limits above those caps, and high explicit limits that still
compact larger command output.
- Reuse the code-mode turn setup helper while directly asserting the
exact exec output item in each test.
## Testing
- `just fmt`
- `git diff --check`
- Not run locally per repo guidance; CI should validate the e2e
integration tests.
## Why
Issue #23214 reports `/ps` showing no background terminals while the
status line still says it is waiting for a background terminal. The race
is in core: `write_stdin` can poll a process that exits before the
response returns. The process manager correctly returns `process_id:
None`, but the handler still emitted a `TerminalInteraction` event using
the requested session id, causing clients to believe a dead process was
still being polled.
Fixes#23214.
## What changed
- Suppress `TerminalInteraction` events for empty `write_stdin` polls
once `response.process_id` is `None`.
- Continue emitting interactions for non-empty stdin, even if that input
causes the process to exit before the response returns.
- Extend the unified exec integration test to assert completed empty
polls do not emit terminal interactions.
## Verification
- `cargo test -p codex-core --test all
unified_exec_emits_one_begin_and_one_end_event`
- `cargo test -p codex-core --test all
unified_exec_emits_terminal_interaction_for_write_stdin`
`cargo test -p codex-core` currently aborts in unrelated
`agent::control::tests::resume_agent_from_rollout_uses_edge_data_when_descendant_metadata_source_is_stale`
with a reproducible stack overflow.
## Why
Plugin and skill loading is useful as warmup and early validation, but
session startup does not need to wait for that work before it can
continue building the session. Keeping it on the serial startup path
adds avoidable latency to every fresh thread start.
We still want invalid skill configurations to show up quickly, and we
want the warmup to exercise the same plugin and skill manager caches
that the normal turn path uses.
## What changed
- moved plugin and skill warmup into the session startup async path
instead of eagerly awaiting it on the serial setup path
- kept the warmup using the session's resolved filesystem/environment
context so skill loading still sees the right roots
- preserved early skill-load error logging so broken skill
configurations still surface during startup
- left the per-turn plugin and skill loading path unchanged, so turns
still use the normal cached managers
## Testing
- Not run locally; relying on CI for validation.
## Why
Clients need a typed permission-profile catalog instead of
reconstructing that state from config internals.
## What changed
- Added `permissionProfile/list` to the app-server v2 protocol with
cursor pagination and optional `cwd`.
- The list response includes built-in permission profiles plus
config-defined `[permissions.<id>]` profiles from the effective config
for the request context.
- Permission profiles keep optional `description` metadata for display
purposes.
- App-server docs and schema fixtures are updated for the new RPC.
## Why
`openai/codex#22169` added a regression test that expects an invalid
child `service_tier` to be rejected, but the test used
`Result::expect_err` on `SpawnAgentHandler::handle`. That requires the
`Ok` type to implement `Debug`, and this handler returns `Box<dyn
ToolOutput>`, so Bazel failed while compiling `codex-core` tests before
it could run them.
## What changed
- Capture the handler result and assert on `result.err()` instead of
calling `expect_err`.
- Keep the same `FunctionCallError::RespondToModel` assertion for the
rejected service tier.
## Verification
- `cargo test -p codex-core
spawn_agent_role_service_tier_does_not_hide_invalid_spawn_request`
## Summary
- remove the unreachable ARC monitor path from MCP tool approval
handling
- delete the unused ARC monitor module/tests and trim the orphaned
safety-monitor decision plumbing
- keep `always allow` approvals on the existing auto-approval
short-circuit without a dead monitor hop
## Testing
- `cargo test -p codex-core mcp_tool_call`
- `just fmt`
- `just fix -p codex-core`
- `git diff --check`
## Additional validation
- Attempted `cargo test -p codex-core`; the library test target passed,
then the integration target failed in this local environment.
- The narrower MCP-focused rerun passed its unit coverage and only hit
missing local `test_stdio_server` binaries in filtered integration
cases.
## Why
Custom agent roles are ordinary config layers, so a role file can
already express `service_tier` just like other config values. The
spawned-agent tier path needs to preserve that effective role config and
follow the same precedence pattern as model/reasoning.
## What changed
- Apply an explicit spawn-time `service_tier` onto the child config
before role application, so a role config layer can override it just
like role-defined model/reasoning settings do.
- Validate the final effective child tier after the final child model is
known, while still falling back to the parent tier when no child tier
survives.
- Add focused integration coverage for both v1 and v2 proving role TOML
loads a service tier, spawned children keep that role-configured tier,
and a role tier wins over a conflicting spawn-time tier.
## Validation
- `just fmt`
- `git diff --check`
- Local Rust tests not run, per repo guidance; CI should exercise the
new coverage.
## Summary
- Add `list_available_plugins_to_install` as the inventory step for
plugin and connector install suggestions.
- Slim `request_plugin_install` so it only handles the actual
elicitation, instead of carrying the full discoverable list in its
prompt.
- Emit send-time telemetry when an install elicitation is dispatched,
including requested tool identity in the event payload.
- Emit install-result telemetry through `SessionTelemetry`, including
tool type, user response action, and completion status.
- Update registration and tests to cover the new two-step flow while
keeping the existing `tool_suggest` feature gate unchanged.
## Testing
- `just fmt`
- `cargo test -p codex-tools`
- `cargo test -p codex-core request_plugin_install`
- `cargo test -p codex-core list_available_plugins_to_install`
- `cargo test -p codex-core
install_suggestion_tools_can_be_registered_without_search_tool`
- `cargo test -p codex-otel
manager_records_plugin_install_suggestion_metric`
- `cargo test -p codex-otel
manager_records_plugin_install_elicitation_sent_metric`
- `just fix -p codex-core`
- `just fix -p codex-tools`
- `just fix -p codex-otel`
- `cargo check -p codex-core`
# What
`SubagentStart` runs once when Codex creates a thread-spawned subagent,
before that child sends its first model request. Thread-spawned
subagents use `SubagentStart` instead of the normal root-agent
`SessionStart` hook.
Configured handlers match on the subagent `agent_type`, using the same
value passed to `spawn_agent`. When no agent type is specified, Codex
uses the default agent type.
Hook input includes the normal session-start fields plus:
- `agent_id`: the child thread id.
- `agent_type`: the resolved subagent type.
`SubagentStart` may return `hookSpecificOutput.additionalContext`. That
context is added to the child conversation before the first model
request.
# Lifecycle Scope
Only thread-spawned subagents run `SubagentStart`.
Internal/system subagents such as Review, Compact, MemoryConsolidation,
and Other do not run normal `SessionStart` hooks and do not run
`SubagentStart`. This avoids exposing synthetic matcher labels for
internal implementation paths.
Also the `SessionStart` hook no longer fires for subagents, this matches
behavior with other coding agents' implementation
# Stack
1. This PR: add `SubagentStart`.
2. #22873: add `SubagentStop`.
3. #22882: add subagent identity to normal hook inputs.
