## Why
Standalone image generation returns image bytes to the model, but the
model also needs the host artifact path to reference the generated file
in follow-up work.
## What changed
- Append the default saved-image path hint alongside the generated image
tool output.
- Reuse the existing core image-generation hint text.
- Pass the thread ID and Codex home directory needed to compute the
artifact path.
- Add app-server and extension coverage for the model-visible hint.
## Validation
- `just fmt`
- `just bazel-lock-check`
- `just test -p codex-app-server
standalone_image_generation_returns_saved_path_hint_to_model`
## Why
The skills extension needs to become the path that exposes local host
skills without losing the behavior already owned by core skill loading.
Host skill discovery is not just `$CODEX_HOME/skills`: it also includes
config layers, bundled-skill settings, plugin roots, runtime extra
roots, and the filesystem for the selected primary environment.
Rather than making the extension reload host skills and risk drifting
from that authoritative load, this PR bridges the already-loaded
per-turn skills outcome into the extension. That lets the extension
advertise host skills and inject explicit `$skill` prompts while
preserving the same roots, disabled/hidden state, rendered paths, and
environment-backed file reads that the legacy path uses.
## What Changed
- Adds `HostLoadedSkills` in `core-skills` to wrap the turn's
`SkillLoadOutcome` and read `SKILL.md` through the filesystem that
loaded that skill.
- Stores `HostLoadedSkills` in turn extension data for normal turns and
review turns, so the skills extension can consume the loaded host
catalog without reloading it.
- Adds `HostSkillProvider` under `ext/skills/src/provider/host.rs`,
mapping host-loaded skill metadata into the skills-extension
catalog/read contract.
- Registers the host provider by default from
`codex_skills_extension::install()`.
- Preserves host skill metadata such as dependencies, disabled state,
hidden-from-prompt policy, and slash-normalized display paths.
- Passes host-loaded skills through `SkillListQuery` and
`SkillReadRequest` so explicit skill invocation reads only resources
from the loaded host catalog.
- Adds integration coverage for a real legacy
`$CODEX_HOME/skills/.../SKILL.md` skill being listed and injected
through the installed extension.
## Testing
- Added `installed_extension_loads_host_skills_from_legacy_roots` in
`ext/skills/tests/skills_extension.rs`.
- `just test -p codex-skills-extension`
## Why
Goal idle continuation is extension-triggered model-visible work, so it
should follow one core-owned rule for when automatic work may start. In
particular, it should not jump ahead of queued user/client work, start
while another task is active, or inject a continuation turn while the
thread is in Plan mode.
Keeping this policy in `try_start_turn_if_idle` avoids passing
`collaboration_mode` or review-specific state through
`ThreadLifecycleContributor::on_thread_idle`. Active `/review` is
covered by the same active-task gate because Review turns are not
steerable.
## What Changed
- Teach `Session::try_start_turn_if_idle` to reject automatic idle turns
in Plan mode, both before reserving an idle turn and after building the
turn context.
- Document `CodexThread::try_start_turn_if_idle` as the extension-facing
gate for automatic idle work, including Plan-mode and active Review-task
behavior.
- Add focused coverage for Plan-mode rejection and active Review-task
rejection without queuing synthetic input.
## Testing
- `just test -p codex-core try_start_turn_if_idle`
## Why
The skills extension needs a real turn-time path before host, executor,
or remote skills can be routed through it. The previous code was mostly
a placeholder catalog/provider sketch, so there was no bounded
available-skills fragment, no source-owned `SKILL.md` read, and no place
for warnings or per-turn selection state to live.
This PR makes `ext/skills` the authority-preserving flow for listing
candidate skills and injecting only explicitly selected main prompts,
without adding more of that logic to `codex-core`.
## What changed
- Expands catalog entries with `main_prompt`, display path, short
description, dependency metadata, enabled/prompt visibility flags, and
authority/package-aware read requests.
- Replaces the placeholder `providers/*` modules with
`SkillProviderSource` and `SkillProviders`, routing list/read/search
calls by source kind and surfacing provider failures as warnings.
- Adds bounded available-skills rendering and `SKILL.md` main-prompt
truncation before the fragments enter model context.
- Resolves explicit skill selections from structured `UserInput::Skill`,
skill-file mentions, `skill://...` paths, and plain `$skill` text
mentions, then reads selected prompts through their owning provider.
- Stores mutable per-thread skills config and per-turn
catalog/selection/warning state.
- Adds `install_with_providers` so tests and future host wiring can
supply concrete providers.
## Testing
- Not run locally.
- Added `codex-rs/ext/skills/tests/skills_extension.rs` coverage for
available-catalog injection, selected prompt injection through the
owning provider, and prompt-hidden skills that remain invokable.
## Why
Goal progress accounting can be reached from multiple completion paths
for the same thread. Each path takes a progress snapshot, writes the
usage delta, and then marks that snapshot as accounted. When two
tool-completion hooks run at the same time, they can both observe the
same unaccounted delta and charge it twice.
## What changed
- Added a per-thread progress-accounting permit to
`GoalAccountingState`.
- Held that permit across the snapshot/write/mark-accounted critical
section for active-turn, idle, and tool-finish accounting.
- Added regression coverage for parallel tool-finish hooks so a shared
token delta is charged once and only one progress event is emitted.
## Testing
- Not run locally.
- Added `parallel_tool_finish_accounts_active_goal_progress_once`.
## Why
The skills extension needs the resolved turn environments to build a
real per-turn `SkillListQuery`. The previous `TurnLifecycleContributor`
hook only had a turn id, so it could only seed a placeholder query and
never carry the executor authorities that executor-scoped skill routing
will need.
Moving catalog resolution onto `TurnInputContributor` puts the skills
extension on the same turn-preparation path that already has the
environment ids and working directories for the submitted turn, while
keeping the actual prompt injection work for follow-up changes.
## What changed
- switch `ext/skills` from `TurnLifecycleContributor` to
`TurnInputContributor`
- build `executor_authorities` from `TurnInputContext.environments` and
pass them through `SkillListQuery`
- keep storing the resolved catalog in `SkillsTurnState`, but drop the
placeholder query helper that no longer matches the real data flow
- update the extension TODOs to reflect that per-turn catalog resolution
now happens in the turn-input contributor, and that prompt/context
injection still needs to move later
## Testing
- Not run locally.
## Disclaimer
Do not use for now
## Why
Extensions can already contribute prompt fragments and request same-turn
item injection, but there was no host-owned hook for contributing
structured `ResponseItem`s while Codex is assembling a new turn's
initial model input. This change adds that seam so extensions can attach
turn-local input that depends on the submitted user input and resolved
turn environments without routing through prompt text or late injection.
## What changed
- add `TurnInputContributor` to `codex_extension_api` and export the new
`TurnInputContext` / `TurnInputEnvironment` types it receives
- teach `ExtensionRegistry` to register and expose turn-input
contributors alongside the existing extension hooks
- call registered turn-input contributors from
`core/src/session/turn.rs` while building the initial injected input for
a turn, then append their returned `ResponseItem`s after the skill and
plugin injections
## Disclaimer
This is only here for iteration purpose! Do not make any code rely on
this
## Why
Skills still live behind `codex-core` discovery and injection paths, but
the extension system needs an authority-aware home before that logic can
move. This adds that boundary without changing current skills behavior,
and keeps host, executor, and remote skills distinct so future
list/read/search flows do not collapse back to ambient local paths.
## What changed
- Add the `codex-skills-extension` workspace/Bazel crate under
`ext/skills`.
- Define the initial catalog, authority, provider, and turn-state types
for authority-bound skill packages and resources.
- Register placeholder thread/config/prompt/turn lifecycle contributors
plus host, executor, and remote provider aggregation points.
- Capture the remaining extraction work as TODOs, including the missing
extension API hooks needed for per-turn catalog construction and typed
skill injection.
- Keep plugins outside the runtime skills model: plugin-installed skills
are treated as materialized host-owned skill sources once available.
## Verification
- Not run locally.
## Why
Standalone image generation remained top-level-only in code-mode
sessions.
## What changed
- Change imagegen exposure from `DirectModelOnly` to `Direct`.
- Keep direct-mode access while enabling nested code-mode access.
- Add a focused regression test for the exposure contract.
## Validation
- `just test -p codex-image-generation-extension`
## Why
Standalone image-generation extensions emitted turn items through the
low-level event path, bypassing host-owned finalization such as image
persistence and contributor processing. At the same time, the
generated-image save-path hint must remain visible to the model through
the extension tool's `FunctionCallOutput`, rather than the legacy
built-in developer-message path.
## What changed
- Extended `ExtensionTurnItem` to support image-generation items while
keeping the extension-facing emitter API limited to `emit_started` and
`emit_completed`.
- Routed extension completion through core `finalize_turn_item`, so
standalone image-generation items receive host-owned processing and
persisted `saved_path` values before publication.
- Kept legacy built-in image generation on its existing
developer-message hint path, while standalone image generation returns
its deterministic saved-path hint in `FunctionCallOutput`.
- Shared the image artifact path and output-hint formatting used by core
and the image-generation extension.
- Passed thread identity through extension tool calls so standalone
image generation can construct the same intended artifact path as core.
- Added an app-server integration test covering real standalone image
generation, saved artifact publication, model-visible output hint
wiring, and absence of the legacy developer-message hint.
## Validation
- `just fmt`
- `just test -p codex-image-generation-extension`
- `just test -p codex-web-search-extension`
- `just test -p codex-goal-extension`
- `just test -p codex-memories-extension`
- Targeted `codex-core` tests for image save history, extension
completion finalization, and contributor execution
- `just test -p codex-app-server
standalone_image_generation_returns_saved_path_hint_to_model`
- `just fix -p codex-core`
- `just fix -p codex-image-generation-extension`
- `just bazel-lock-update`
- `just bazel-lock-check`
## 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`
## Summary
- add an extension-owned `GoalApi` for thread goal get/set/clear
operations
- register live goal runtimes with the API from the goal extension
backend
- cover the API and runtime-effect paths in goal extension tests
## Stack
Follow-up app-server wiring PR: #25108
## Validation
- `just fmt`
- `just fix -p codex-goal-extension`
- `just test -p codex-goal-extension`
## Why
Goal steering prompts have grown into long inline Rust strings, which
makes the authored prompt text hard to review and easy to damage while
changing the surrounding plumbing. Moving those prompts into embedded
Markdown templates keeps the policy text in the shape reviewers actually
read, while preserving the existing runtime substitution and objective
escaping behavior.
## What changed
- Added `ext/goal/templates/goals/continuation.md`, `budget_limit.md`,
and `objective_updated.md` for the three goal steering prompts.
- Updated `ext/goal/src/steering.rs` to parse those embedded templates
once with `codex-utils-template` and render the existing goal values
into them.
- Kept user objectives XML-escaped before rendering and converted budget
counters into template variables.
- Added the template directory to `ext/goal/BUILD.bazel` `compile_data`
so Bazel has the same embedded prompt inputs as Cargo.
## Testing
- Not run locally.
## Why
The goal extension needs a way to resume an active goal after the thread
becomes idle, but the old core goal runtime should not be refactored as
part of this step. The missing piece is a small core-owned turn-start
primitive: let an extension ask for a normal model turn only when the
thread is idle, and otherwise fail without injecting into whatever is
currently active.
## What Changed
- Adds `CodexThread::try_start_turn_if_idle(...)` as the narrow
extension-facing primitive for synthetic idle work.
- Implements the session side so it refuses to start when:
- the provided input is empty,
- the session is in plan mode,
- a turn is already active, or
- trigger-turn mailbox work is pending.
- Gives trigger-turn mailbox work priority if it appears while the idle
turn is being prepared.
- Wires `GoalExtension::on_thread_idle` to read the active persisted
goal and submit the continuation prompt through this idle-only
primitive.
- Keeps the legacy core goal continuation implementation in place
instead of folding it into this PR.
## Behavior
This is intentionally best-effort. If `try_start_turn_if_idle` observes
that the thread is not idle, or that higher-priority mailbox work should
run first, it returns the input to the caller. The goal extension drops
that continuation prompt and waits for a future idle opportunity instead
of injecting stale synthetic goal text into an active turn.
## Validation
- `just test -p codex-core
try_start_turn_if_idle_rejects_active_turn_without_injecting`
- `just test -p codex-goal-extension`
## Why
The standalone `/v1/alpha/search` request now requires a `model`, but
the `web.run` extension currently omits it.
Adds `model` to extension `ToolCall` invocation.
Follow-up to #23823.
## What changed
- Make `SearchRequest.model` required.
- Expose the effective per-turn model on extension tool calls and pass
it in standalone web-search requests.
- Assert the model is forwarded in the app-server round-trip test.
## Testing
- `just test -p codex-api -p codex-tools -p codex-web-search-extension
-p codex-memories-extension -p codex-goal-extension`
- `just test -p codex-core -E
'test(passes_turn_fields_and_scoped_turn_item_emitter_to_extension_call)'`
- `just test -p codex-app-server -E
'test(standalone_web_search_round_trips_encrypted_output)'`
## Why
The standalone `image_gen.imagegen` extension should behave like native
image generation for artifact persistence and UI completion, while
returning its save-location guidance as part of the tool result instead
of injecting a developer message.
## What Changed
- Added an image-generation completion hook for extension tools so core
can persist generated images and emit the existing `ImageGeneration`
lifecycle events.
- Reused core image artifact persistence for extension output and
removed extension-local save-path/file-writing logic.
- Split shared image persistence from built-in finalization so native
image generation keeps its existing developer-message instruction
behavior.
- Returned the generated image save-location instruction through the
extension `FunctionCallOutput`, alongside the generated image input for
model follow-up.
- Preserved the existing image-generation event shape for current UI and
replay compatibility.
- Avoided cloning the full generated-image base64 payload when emitting
the in-progress image item.
- Removed dependencies no longer needed after moving persistence out of
the extension crate.
## Fast Follow
- Adjust the existing Extension API and add a general `TurnItem`
finalization path for re-usability of code
## Validation
- Ran `just fmt`.
- Ran `just bazel-lock-update`.
- Ran `just bazel-lock-check`.
- Ran `just test -p codex-tools -p codex-extension-api -p
codex-image-generation-extension`.
- Ran `just test -p codex-core
image_generation_publication_is_finalized_by_core`.
- Ran `just test -p codex-core
handle_output_item_done_records_image_save_history_message`.
- Ran `just fix -p codex-tools -p codex-extension-api -p codex-core -p
codex-image-generation-extension`.
## Why
Standalone `web.run` calls run in the extension, so they need normal
web-search progress activity while a request is in flight and durable
completed activity after a thread is reloaded.
Follow-up to #23823; uses the extension turn-item emission path added in
#24813.
## What changed
- Emit standalone `web.run` start/completion items through the host
turn-item emitter, preserving standard client delivery and rollout
persistence.
- Include useful completion detail for queries, image queries, and
literal-URL `open`/`find` commands.
- Render completed searches as `Searched the web` or `Searched the web
for <detail>`, with snapshot coverage for the detail-free case.
- Extend the app-server round-trip test to verify completed search
activity is reconstructed by `thread/read` after a fresh-process reload.
## Testing
- `just test -p codex-web-search-extension`
- `just test -p codex-app-server -E
"test(standalone_web_search_round_trips_encrypted_output)"`
## Summary
- handle goal usage-limit turn errors in the goal extension
- exercise the extension path in the goal backend test
## Tests
- just fmt
- just test -p codex-goal-extension
- just fix -p codex-goal-extension
## Why
This PR is stacked on #24918, which moves goal steering onto
source-labeled internal model context fragments. Active-turn goal
steering should use the same running-turn injection path as other
runtime steering, so those fragments enter the pending input queue as
`ResponseItem`s through the existing
[`Session::inject_if_running`](https://github.com/openai/codex/blob/8d6f6cdf69b055c27682e7cdea9caf72a3e2ee7f/codex-rs/core/src/session/inject.rs#L12-L27)
behavior instead of through a goal-specific conversion wrapper.
## What Changed
- Exposes a narrow `CodexThread::inject_if_running` bridge for callers
that only hold a thread handle.
- Changes `ext/goal` active-turn steering to pass `ResponseItem`s
directly.
- Builds goal steering prompts as contextual internal model context
`ResponseItem`s before injecting them into the running turn.
## Testing
Not run locally; PR metadata update only.
## Why
Goal steering is one form of runtime-owned model context, but the old
`<goal_context>` wrapper made the contextual-fragment hiding path
goal-specific. Using a source-labeled internal context fragment gives
core and extensions a shared shape for hidden model steering while
keeping those prompts out of visible turn history.
The change also keeps legacy `<goal_context>` messages recognized as
hidden contextual input so existing stored history does not start
rendering old goal-steering prompts as user-visible turn items.
## What Changed
- Replaces `GoalContext` with `InternalModelContextFragment` plus a
validated `InternalContextSource`.
- Renders goal steering as `<codex_internal_context
source="goal">...</codex_internal_context>`.
- Updates core goal steering and `ext/goal` steering to inject the new
internal-context fragment.
- Updates contextual-fragment, event-mapping, goal, and session tests
for the new wrapper.
## Test Coverage
- Adds coverage for detecting the new internal model context fragment.
- Preserves coverage for hiding legacy `<goal_context>` fragments.
- Verifies invalid internal context sources are rejected and arbitrary
context tags are not hidden.
- Updates goal steering/session assertions to expect the new
`source="goal"` wrapper.
## Why
Add a standalone image generation path that can be exercised
independently of hosted Responses image generation, while retaining the
hosted tool as fallback unless the extension is actually available to
the model.
## What changed
- Added the `codex-image-generation-extension` crate with standalone
generate/edit execution, prior-image selection for edits, model-visible
image output, and local generated-image persistence.
- Installed the extension in app-server behind the disabled-by-default
`imagegenext` feature and backend eligibility checks.
- Updated core tool planning so eligible `image_gen.imagegen` exposure
replaces hosted `image_generation`, while unavailable configurations
retain hosted fallback.
- Added coverage for extension behavior, edit history reuse, feature
gating, auth eligibility, and hosted-tool replacement.
- The extension is installed through app-server only in this PR; other
execution paths retain hosted image generation because hosted
replacement occurs only when the standalone executor is actually
registered and model-visible.
- The initial extension contract intentionally fixes the image model to
`gpt-image-2` and uses automatic image parameters.
- Native generated-image history/card parity and rollout persistence
cleanup are intentionally deferred follow-up work.
## Validation
- `just test -p codex-image-generation-extension`
- `just test -p codex-features`
- `just test -p codex-core
hosted_tools_follow_provider_auth_model_and_config_gates`
- `just test -p codex-app-server`
- `just fix -p codex-image-generation-extension -p codex-features -p
codex-core -p codex-app-server`
- `just fmt`
- `just bazel-lock-update`
- `just bazel-lock-check`
---------
Co-authored-by: jif-oai <jif@openai.com>
## Why
Extension-contributed tools need to emit visible turn items through
Codex's normal event and persistence pipeline.
## What
- Add `TurnItemEmitter` to extension `ToolCall`s and route the core
implementation through `Session::emit_turn_item_*`.
- Hold weak session and turn references so retained tool calls cannot
keep host state alive.
- Provide a no-op emitter for extension test callers.
## Test Plan
- `just test -p codex-core -E
'test(passes_turn_fields_and_scoped_turn_item_emitter_to_extension_call)'`
---------
Co-authored-by: jif-oai <jif@openai.com>
## Why
Goal tools create and update goal state for a persistent thread. The
extension was only checking whether goals were enabled before
advertising those tools, which meant they could be surfaced in contexts
that should not receive thread goal controls: ephemeral threads without
persistent thread state and review subagents.
Those sessions can still run the goal extension lifecycle, but the
thread tools should only be visible when the current thread can safely
use them.
## What changed
- Adds a `GoalRuntimeConfig` that separates goal enablement from whether
goal tools are available for the current thread.
- Computes tool eligibility on thread start from
`persistent_thread_state_available` and `SessionSource`, hiding tools
for review subagents.
- Uses `GoalRuntimeHandle::tools_visible()` when contributing thread
tools so enabled runtime state does not automatically imply tool
exposure.
- Adds backend coverage for hiding goal tools on ephemeral threads and
review subagents.
## Testing
- Added `goal_tools_hidden_for_ephemeral_threads`.
- Added `goal_tools_hidden_for_review_subagents`.
Summary
- Add TurnErrorInput and TurnLifecycleContributor::on_turn_error to the
extension API.
- Emit the turn-error lifecycle from core turn error paths, including
usage limit failures.
- Add direct lifecycle coverage for the emitted error facts and stores.
Tests
- just fmt
- git diff --check
- Not run: full tests or clippy (per instructions)
Summary: add session source and persistent-state availability to
ThreadStartInput; populate them from session init; update existing goal
test harness constructors. Tests: just fmt; git diff --check. No full
tests or clippy run per request.
## Why
Dedicated memories tools are exposed through a Responses API namespace
tool. The namespace itself has to be a valid tool identifier, so
`memories/` can fail validation before the model ever gets a chance to
call the memory tools.
## What changed
- Changed `MEMORY_TOOLS_NAMESPACE` from `memories/` to `memories`.
- Added `memory_tool_namespace_matches_responses_api_identifier` so the
namespace stays non-empty and limited to Responses-safe identifier
characters.
## Verification
- Added unit coverage for the namespace identifier shape in
`codex-rs/ext/memories/src/tests.rs`.
## Why
Extensions can currently observe thread start, resume, and stop, but
they do not have a lifecycle point for the host to say that immediately
pending thread work has drained. That makes idle follow-up behavior
harder to express as extension-owned logic instead of host-specific
plumbing.
This adds an explicit idle lifecycle hook so an extension can react when
a thread becomes idle while the host keeps ownership of whether any
submitted follow-up input starts a turn, is queued, or is ignored.
## What changed
- Added `ThreadIdleInput` with access to the session-scoped and
thread-scoped extension stores.
- Added a default `on_thread_idle` method to
`ThreadLifecycleContributor`.
- Re-exported `ThreadIdleInput` from the extension API surface.
## Testing
Not run; this only extends the extension API trait surface with a
default hook and exported input type.
## Why
The extracted goal runtime needs a host-callable path for turns that
stop because the workspace usage limit is reached. In that case, any
in-turn goal progress should be accounted before the goal becomes
terminal, and active goal accounting must be cleared so later
tool-finish or turn-stop handling does not keep charging usage to a
stopped goal.
## What changed
- Adds `GoalRuntimeHandle::usage_limit_active_goal_for_turn`, which
accounts current active-goal progress, marks the active or
budget-limited thread goal as `UsageLimited`, records terminal metrics
when the status changes, clears active goal accounting, and emits the
updated goal event.
- Covers both active and budget-limited goals in
`ext/goal/tests/goal_extension_backend.rs`, including the invariant that
later token/tool events do not add usage after the goal has been
usage-limited.
## Testing
- Added
`usage_limit_active_goal_accounts_progress_and_clears_accounting`.
- Added `usage_limit_budget_limited_goal_accounts_remaining_progress`.
add new `parse_tool_input_schema_without_compaction` to bypass the
existing compaction/trimming of client-provided tool schemas that are
over 4k bytes.
we want this for standalone web search to keep field guidance/metadata
on certain fields; this keeps us closer to parity with existing hosted
tool schema (which didnt go through this 4k byte filter).
## Summary
Adds experimental `additionalContext` support to `turn/start` and
`turn/steer` so clients can provide ephemeral external context, such as
browser or automation state, without turning that plumbing into a
visible user prompt or triggering user-prompt lifecycle behavior.
## API Shape
The parameter shape is:
```ts
additionalContext?: Record<string, {
value: string
kind: "untrusted" | "application"
}> | null
```
Example:
```json
{
"additionalContext": {
"browser_info": {
"value": "Active tab is CI failures.",
"kind": "untrusted"
},
"automation_info": {
"value": "CI rerun is in progress.",
"kind": "application"
}
}
}
```
The keys are opaque and caller-defined.
## Context Injection
When provided, accepted entries are inserted into model context as
hidden contextual message items, not as visible thread user-message
items.
`kind: "untrusted"` entries are inserted with role `user`:
```text
<external_${key}>${value}</external_${key}>
```
`kind: "application"` entries are inserted with role `developer`:
```text
<${key}>${value}</${key}>
```
Values are not escaped. Each value is truncated to 1k approximate tokens
before wrapping.
For `turn/start`, accepted additional context is inserted before normal
user input. For `turn/steer`, additional context is merged only when the
steer includes non-empty user input; context-only steers still reject as
empty input.
## Dedupe Strategy
`AdditionalContextStore` lives on session state and stores the latest
complete additional-context map.
Each `turn/start` or non-empty `turn/steer` treats its
`additionalContext` as the current complete set of values. Entries are
injected only when the key is new or the exact entry for that key
changed, including `value` or `kind`. After merging, the store is
replaced with the provided map, so omitted keys are removed from the
retained set and can be injected again later if reintroduced.
Omitting `additionalContext`, passing `null`, or passing an empty object
resets the store to empty and injects nothing.
## What Changed
- Threads experimental v2 `additionalContext` through app-server into
core turn start and steer handling.
- Adds separate contextual fragment types for untrusted user-role
context and application developer-role context.
- Uses pending response input items so additional context can be
combined with normal user input without treating it as prompt text.
- Adds integration coverage for start/steer flow, role routing,
dedupe/reset behavior, deletion/re-add behavior, hook-blocked input
behavior, empty context-only steer rejection, external-fragment marker
matching, and truncation.
## Summary
Add the extension-backed standalone `web.run` tool so Codex can call the
standalone search endpoint through the `codex-api` search client and
return its encrypted output to Responses.
- gate the new tool behind `standalone_web_search`
- install the extension in the app-server thread registry and hide
hosted `web_search` when standalone search is enabled for OpenAI
providers so the two paths stay mutually exclusive
- build search context from persisted history using a small tail
heuristic: previous user message, assistant text between the last two
user turns capped at about 1k tokens, and current user message
## Test Plan
- `cargo test -p codex-web-search-extension`
- `cargo test -p codex-api`
- `cargo test -p codex-core
hosted_tools_follow_provider_auth_model_and_config_gates`
## Why
Goal idle accounting is supposed to survive a thread resume. Previously,
the resume hook restored the active goal state inline from the extension
lifecycle contributor, which left the runtime handle without a reusable
restoration path and made the behavior hard to cover directly. When a
thread with an active goal was resumed, goal accounting could lose track
of the active idle goal instead of continuing to accrue elapsed time.
## What changed
- Moved thread-resume restoration into
`GoalRuntimeHandle::restore_after_resume()` so the runtime owns
rehydrating active goal accounting from persisted thread goal state.
- Kept disabled goal runtimes as a no-op and preserved the existing
warning path when persisted goal state cannot be loaded.
- Added a backend regression test that seeds an active goal, resumes the
thread, waits briefly, and verifies elapsed idle time is reflected on
the next external goal mutation.
## Testing
- Not run locally; this metadata update only rewrote the PR title/body.
## Why
`core/src/goals.rs` already emits OTEL metrics for goal creation,
resume, terminal transitions, token counts, and duration. As `/goal`
moves into `ext/goal`, the extension needs to preserve that telemetry
contract instead of only emitting app-visible `ThreadGoalUpdated`
events.
This keeps the existing `codex.goal.*` metric surface intact while goal
lifecycle ownership shifts toward the extension.
## What changed
- Added an extension-local `GoalMetrics` helper that records the
existing `codex.goal.*` counters and histograms through `codex-otel`.
- Threaded an optional `MetricsClient` through `install_with_backend`,
`GoalExtension`, `GoalRuntimeHandle`, and `GoalToolExecutor`.
- Emitted created, resumed, and terminal goal metrics from the extension
paths that create goals, restore active goals on thread resume, account
budget limits, complete or block goals, and handle external goal
mutations.
- Updated existing goal extension test setup callsites to pass `None`
for metrics when instrumentation is not under test.
## Verification
Not run locally.
## Why
The memories extension already has dedicated `list`, `read`, `search`,
and `add_ad_hoc_note` tools, but app-server registration was still
disabled. The memories app collaborator needs an explicit config switch
so those native extension tools can be exposed intentionally, without
making ordinary memory prompt usage automatically register the dedicated
tool surface.
## What changed
- Added `[memories].dedicated_tools`, defaulting to `false`, to
`MemoriesToml` / `MemoriesConfig`.
- Regenerated `core/config.schema.json` for the new setting.
- Registered the memories extension as a `ToolContributor`, while
keeping tool contribution gated on both memories being enabled and
`dedicated_tools = true`.
- Added tests for the disabled default, the enabled dedicated-tools
path, and installer registration.
## Verification
- `just test -p codex-config -p codex-memories-extension`
## Why
The memories extension now receives a metrics exporter, but the useful
extension-owned signal is the memory tool call itself: which operation
ran, which memory area it touched, whether the backend call succeeded,
and whether the result was truncated.
## What changed
- Added the `codex.memories.tool.call` counter in
`ext/memories/src/metrics.rs`.
- Emit that counter from `memories/add_ad_hoc_note`, `memories/list`,
`memories/read`, and `memories/search` after backend execution.
- Tag each call with `tool`, `operation`, `scope`, `status`, and
`truncated`.
- Pass the existing `MetricsClient` through the memories extension into
the tool executors; tests use `None`.
## Verification
- `just test -p codex-memories-extension`
## Summary
- let the memories extension capture the process-global OTEL metrics
client at install time
- keep app-server/TUI/exec extension construction APIs unchanged
- store the metrics client for future memory metrics without emitting
any metrics yet
## Test plan
- `just fmt`
- `just bazel-lock-update`
- `just bazel-lock-check`
- Not run: tests/clippy per request; CI will cover them
## Why
Codex memory updates currently rely on instructions that tell agents to
create ad-hoc note files directly in the memory workspace. The memories
extension already has a `MemoriesBackend` abstraction for local storage
and future non-filesystem backends, so the ad-hoc note writer should
live behind that same interface instead of baking local filesystem
assumptions into the tool shape.
## What
- Adds a `memories/add_ad_hoc_note` tool to the existing memories tool
bundle.
- Extends `MemoriesBackend` with `add_ad_hoc_note` plus request/response
types so remote memory stores can implement the same operation later.
- Implements the local backend by creating append-only notes under
`extensions/ad_hoc/notes`.
- Validates the tool-provided filename contract
(`YYYY-MM-DDTHH-MM-SS-<slug>.md`), rejects path-like filenames, rejects
empty notes, and uses create-new semantics so existing notes are never
overwritten.
- Keeps memories tool contribution behind the existing commented-out
registration path; this defines the tool surface without newly exposing
it through app-server.
## Test Plan
- `just test -p codex-memories-extension`
## Why
The memories extension now owns the read-path developer instructions it
injects at thread start. Keeping that prompt builder and template in
`codex-memories-read` left the extension depending on a helper crate for
extension-specific prompt assembly, and kept async template/truncation
dependencies in the read crate after the remaining read surface no
longer needed them.
## What changed
- Moved `prompts.rs`, its tests, and `templates/memories/read_path.md`
from `memories/read` into `ext/memories`.
- Wired `MemoryExtension` to call the local prompt builder and added the
moved templates to `ext/memories/BUILD.bazel` compile data.
- Removed the now-unused prompt export and prompt-related dependencies
from `codex-memories-read`.
## Testing
- Not run locally.
## 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`
## 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.
## 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
`main` picked up two small Rust build failures after nearby merges:
- #23507 added a real handler for
`ServerNotification::ThreadSettingsUpdated`, but the same variant was
still listed in the ignored-notification match arm. Full Clippy runs
treat the resulting unreachable-pattern warning as an error.
- #23666 added `turn_id` and `truncation_policy` to
`codex_tools::ToolCall`, while the goal extension backend test fixtures
from the goal-extension work still used the old shape. That left
`codex-goal-extension` tests unable to compile once the branches met on
`main`.
## What changed
Removed the duplicate `ThreadSettingsUpdated` match pattern from
`tui/src/chatwidget/protocol.rs`.
Updated the goal extension test `tool_call` helper to populate the new
`ToolCall` fields, and reused that helper for the one direct literal
that still had the old field list.
## Verification
- `just fix -p codex-tui`
- `cargo test -p codex-goal-extension`
## What
- Preserve database accounting failures from the goal extension instead
of collapsing them into `None`
- Warn with turn/tool context when a flush fails
- Keep stop/abort accounting snapshots alive when the final flush did
not persist
## Why
PR #23696 can finish and discard a turn snapshot after
`account_thread_goal_usage` fails. That loses the final accumulated
accounting state silently. This follow-up keeps that failure explicit
and avoids deleting the local snapshot in the failing path.
## Testing
- `just fmt`
- `cargo test -p codex-goal-extension`
## 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
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