## Why
Output produced before the streaming subscriber attaches can be missing from command completion events, even when it was returned to the model.
## What changed
Record the bounded completion transcript directly in `UnifiedExecProcess` as local and exec-server output arrives. Keep it independent of output polling and streaming delta delivery, and use it for completion events.
## Testing
Add regression coverage for output collected before subscription, both with and without later output. Strengthen the lifecycle test to assert that `aggregated_output` includes both early and late output.
GitOrigin-RevId: 9825acbd706dc4845837c8b4ab1347d8267ce0af
## Why
The default transport fallback bypassed managed application network policy when using `ReqwestDefault` proxy handling or running inside the Codex sandbox.
## What changed
Use a `RouteAwareClientPool` whenever application network policy is managed, retaining policy enforcement for requests and redirects while preserving legacy proxy behavior and custom CA fallback.
## Testing
Add code mode web search regression cases for denied initial requests and denied redirect destinations, verifying that policy errors reach tool output and no requests reach the denied destination.
GitOrigin-RevId: 74ba0e6e4dcad03f3e83c0450b8b17bcefcc267c
## Why
Tool lifecycle observers need visibility into calls rejected before execution starts and timing that remains available on cancellation, independently of tracing settings.
## What changed
- Add `on_tool_dispatch` and `on_tool_timing` callbacks to `ToolLifecycleContributor`, with thread, turn, and call IDs for correlation.
- Report direct calls before readiness, dispatch waiting, and hooks. Report handler duration when dispatch completes or is dropped, excluding readiness and gate waiting and returning zero if the call never passes the gate.
- Expose code-mode host durations as a separate `HostOperation` timing boundary. Exclude nested code-mode calls from dispatch and handler timing observations to avoid double counting.
## Testing
Add tests for callback ordering on completed and rejected calls, timing on cancellation, zero handler duration before gate admission without tracing, and code-mode host timing without nested dispatch or handler timing observations.
GitOrigin-RevId: 97998b5094564c13cb2cfad089bb0a9d6615eb5c
## What changed
Add `otel.log_agent_responses`, disabled by default and requiring an OTLP HTTP or gRPC log exporter. Emit `codex.agent_response` for completed `final_answer` messages from main agents and spawned task agents, with session, turn, item, and available parent/root attribution.
Strip memory citations from exported text, preserve the stored answer, and cap responses at 64 KiB on a UTF-8 character boundary. Include the original byte length and a truncation flag, and suppress duplicate item completions within each turn. Exclude commentary and non-task agents.
## Testing
Extend configuration tests for default-off and explicit opt-in behavior, the agent execution test for main/subagent response attribution, and the log-buffer test for response-event exclusion.
GitOrigin-RevId: eacda1150de2e6bac2c667d71b57214b0a086f1a
## Why
The Browser connector on `codex_apps` needs the computer-use policies and review handling already applied to `node_repl` and `cua_repl`.
## What changed
- Classify `connector_openai_browser` using registered tool metadata and preserve its computer-use scope through Guardian review.
- Extend confirmation-policy forwarding, review evidence capture, JavaScript execution tracking, and initial-call approval handling to the Browser connector.
- Correlate Browser elicitations with live invocations so nested actions retain their own review identity while assessments are attributed to the originating call. Require verified Browser identity for strict nested review.
- Include the Browser connector in computer-use policy prompts and bundled model messages.
## Testing
Add integration coverage for ordinary and strict Browser nested reviews, including policy injection and action attribution. Verify strict review declines requests with missing or unknown invocation correlation or a non-Browser registration.
GitOrigin-RevId: b04af6fb9db1bac2203dc4265913d210746df90b
## What changed
Add `model_messages.tools.indirect_description_prefixes` with selectors for exact namespaces and configured MCP server names. Apply the selected model's guidance to namespace documentation embedded in `CodeModeOnly` prompts, `ALL_TOOLS` descriptions, and namespaces returned by tool search.
Trim prefix values, treat empty values as no prefix, and reject conflicting selectors for the same namespace. Apply prefixes during rendering so model changes take effect without altering direct tool specifications, search ranking, or tool dispatch.
## Testing
Add unit tests for prefix normalization, namespace grouping, MCP server mapping, and conflicts. Add scenarios covering both Code Mode variants, clearing prefixes on model changes, unchanged tool dispatch, and conflict rejection before a model request.
GitOrigin-RevId: 0c7ce6d418c775945c2ccfdab3c605fa4d431b55
## Why
HTTP retries used local backoff even when the server supplied `Retry-After`. Relative retry delays also failed to account for time spent propagating errors or reporting retries.
## What changed
- Parse `Retry-After` delay seconds and HTTP dates into a monotonic deadline captured when response headers arrive.
- Honor that deadline for HTTP retries, falling back to local backoff when valid advice is absent.
- Preserve deadlines through API and Bedrock error mapping, stream retries, and exhausted retry state. Expired advice remains a zero delay instead of triggering local backoff.
## Testing
Add coverage for header parsing, deadline countdown and expiry, error mapping after exhausted HTTP retries, and delayed stream retry notifications. Update Responses and remote compaction tests to verify that HTTP retries honor `Retry-After`.
GitOrigin-RevId: a2eff02946e5524f29e06f7ba1431e3d339261a4
## What changed
- Add `tui.copy_on_select` with `auto` (default), `always`, and `never` modes, and apply it to the fullscreen transcript, transcript overlay, and resume/fork previews.
- Enable `auto` in tmux and Zellij, and in direct macOS terminals except Ghostty and Kitty. On other platforms, enable it in direct terminals identified as iTerm2 or Terminal.app.
- Copy nonempty mouse selections on release, including word and line selections, while retaining their highlight. Preserve link activation and ignore empty selections.
- Clear composer selections after confirmed keyboard copies, matching right-click copies, while preserving the draft and cursor. Keep selections when copying fails or delivery is unconfirmed.
## Testing
Add coverage for terminal defaults and configuration overrides, copying on release, retained highlights, repeated clicks, link activation, and empty drags. Extend composer coverage to verify selection clearing for `Cmd-C`, `Ctrl-C`, and right-click across clipboard outcomes.
GitOrigin-RevId: 24e6f9e267ef3ab249c5356db736e094127f68b8
## Why
Startup prewarm waited for tool discovery before opening its WebSocket connection. Slow MCP startup therefore delayed connection setup even though the handshake could proceed independently.
## What changed
- Run the WebSocket handshake concurrently with tool capture, then send `generate=false` with the discovered tools and finalized request metadata.
- Include model and effective service-tier routing hints in preconnect, including the inherited tier for spawned subagents. Omit routing hints for guardian reviewer requests.
- Recover authentication failures during preconnect and switch to HTTP fallback on `426 Upgrade Required`.
## Testing
Add and extend regression coverage for handshake overlap with delayed MCP discovery, cancellation before warmup, finalized Responses Lite tool metadata, socket reuse and reconnection, service-tier changes and inheritance, and authentication recovery during preconnect.
GitOrigin-RevId: ecb53540765df8227e55e79910a13a05260a4c8d
## What changed
Use `agent_control.resolve` for message board agent lookups and path validation instead of accessing `local_agent_runtime` directly. Derive paths from the session source, with a root fallback, and verify that each path resolves to the agent that owns it.
Validate the requested caller's thread for path and clock queries, and apply the same path ownership check to notification recipients.
GitOrigin-RevId: 92632a31b493b6519d2154f49e9d1d4a1019b394
## Why
Actions targeting a secondary environment could be reviewed with the primary environment's denied-read restrictions. Each review needs the permission context of the environment that owns the action, including when a Guardian session is reused across environments.
## What changed
- Carry `environment_id` through environment-scoped approval requests and their planned-action JSON.
- Select and label permission context using the target environment, explicitly stating when it has no denied-read paths or globs.
- Reject reviews for unavailable target environments and reject environment IDs longer than 256 bytes before Guardian inference, while preserving manual approval routing for oversized IDs.
## Testing
Add coverage for `exec_command`, `apply_patch`, and `request_permissions` reviews switching environments while preserving the existing review prefix. Extend tests for environment-specific restrictions, unavailable environments, action serialization, and the 256-byte ID boundary.
GitOrigin-RevId: ad3292edddb1c6f5b180142c6857cba6f1308328
## What changed
Add `AgentControl::ensure_child_loaded` and use the parent's configured agent control in `ThreadManager` to reload recorded V2 children. The local implementation delegates to the existing loader using the live parent's current configuration, preserving parent-controlled restoration without sending input.
GitOrigin-RevId: 67cadf79cbc034eb271c5ae13145f1a42722fe69
## Why
Enabling `features.token_budget.use_history_notes_extension`, explicitly or through model defaults, rejected session startup when the model lacked `supports_experimental_context`, even with experimental mode disabled.
## What changed
Remove that startup restriction so token-budget history and notes can be used independently of the model's experimental context capability.
## Testing
Extend core tests to cover explicit configuration and model defaults on startup and cold resume, checking `new_context`, token-budget contexts, and `history_ingest_requested` metadata. Add app-server coverage for native history and notes tools and context-window hints without experimental context capability.
GitOrigin-RevId: 6157479aeb75ffd785b8d4b2f48b11c6f46e8f35
## Why
Messages sent through the singular `user_message` connector were omitted from Guardian's delivered assistant message evidence because only `user_messaging` tool names were recognized.
## What changed
Accept both namespaced and flat `user_message` forms of `send_message` alongside the existing `user_messaging` forms.
## Testing
Extend Guardian subagent authorization tests to cover the singular connector and flat tool names, including blocked post-tool hooks and cancellation before confirmation. Add a negative case ensuring `send_message_to_thread` is not treated as delivered message evidence.
GitOrigin-RevId: 68495642ef4b78eec71df4fee2bacfda407adc47
## What changed
Add `resolve_root_git_project_uri_for_trust` to resolve repository trust roots through `ExecutorFileSystem` using executor path conventions. Share repository and linked-worktree validation with native lookup while preserving native ancestry for paths with opaque URI representations.
Extract `ProjectTrustLookup` to match merged project settings using supplied path spellings and an explicit path convention. Preserve canonical-before-original and cwd-before-repository-root precedence, including cwd entries without a trust level, with ASCII case-insensitive matching for Windows.
## Testing
Add coverage for POSIX, Windows drive and UNC trust roots, project-key precedence and case handling, and native/URI lookup parity. Extend environment-config coverage to verify returned `projects` entries include entries without a trust level.
GitOrigin-RevId: 315434802e86cceee85b14bc1c3767a45e3139f5
## What changed
Launch Unix shell snapshot commands through `codex_utils_pty::Command` with `ProcessMode::NewSession`, replacing the custom `pre_exec` hook. Pass the complete, scrubbed child environment and preserve the original command arguments so NUL bytes are rejected before execution.
## Testing
Add a Unix regression test asserting that a snapshot script containing a NUL byte returns `InvalidInput` without creating the file it would otherwise write.
GitOrigin-RevId: ef68a6c9f64d7a541498d3ecc4113fad8ff7ed14
## Why
A realtime call can start or end while a text turn is still running. Using call activity captured at turn creation leaves subsequent model requests with stale realtime context.
## What changed
Capture realtime activity and mode instructions together in a `StepContext` snapshot for each model request. Use that snapshot to build realtime instructions and persist `realtime_active` in the request's turn context. Store the conversation and mode instructions under one mutex so they are installed together when a call starts.
## Testing
Extend the realtime handoff integration test to start and close a call during one text turn, verifying that successive requests include the appropriate start and end instructions.
GitOrigin-RevId: 4c5c2b47b7c0c06ae28167013218dc2e3cd72c42
## What changed
Serialize custom reasoning effort values that parse as `u64` as JSON numbers in API requests. For example, `model_reasoning_effort = "64"` now sends `reasoning.effort` as `64`. Keep named values and custom values that cannot parse as `u64` as strings.
## Testing
Expand the request integration test to cover configured named effort, zero, a positive integer, an unknown name, a negative value, and an integer exceeding `u64`.
GitOrigin-RevId: 18ad03a1cd97dfa3f1a3cc49a43b3f7ca7d9b657
## Why
Guardian authorization reviews need the assistant message that prompted a user’s approval, even when a post-tool hook blocks the messaging result or compaction removes the original tool call.
## What changed
Retain confirmed delivered assistant text from tool-output metadata at the original call’s position in thread-owned Guardian context. Recover these messages when restoring checkpoints and respect the call’s inherited-context status.
## Testing
Extend authorization coverage to verify that a delivered message remains in the Guardian root snapshot after a blocked tool result, compaction, and resume, and update checkpoint expectations to preserve assistant/approval ordering.
GitOrigin-RevId: df30ec8a3ef21443210a937ab6db119de8a5fd51
## Why
A user can reply to a streamed question before its completed message is recorded. Assigning the assistant message's order at completion can place the reply before the question in retained context.
## What changed
Reserve an assistant message's order when its source stream starts in thread-owned Guardian context, then reuse that reservation when recording the message. Reserve completion-only messages before publishing their text, and give text and plan output from the same source message a single order.
## Testing
Add streaming regression coverage that accepts a reply before the question completes and verifies question-before-reply ordering both live and after resume. Cover server-provided and generated message IDs, plan output, and text combined with a plan.
GitOrigin-RevId: cb67e7459c804df7beb0841908244202448c655a
## Why
Ordinary user replies can depend on preceding assistant messages. Losing those messages during compaction can leave Guardian without the context needed to interpret a reply's scope.
## What changed
- Retain original assistant messages, including commentary, with their recorded order across checkpoints and resume. Exclude compaction output from this evidence.
- Include assistant context in local and delegated reviews as untrusted context, with separate storage limits and lower budget priority than user instructions.
- Prefer assistant context preceding ordinary replies when selecting bounded root evidence, and report unavailable context without inferring what a reply refers to.
- Preserve inherited context scope and remove assistant evidence beyond rollback boundaries, including during rollout migration.
## Testing
Extend coverage for compaction and resume, checkpoint migration, queued-input ordering and rollback, role labeling, and evidence budgets that preserve user restrictions while dropping assistant context.
GitOrigin-RevId: 886189b0be29ffc3d324b56f5d0b673d6b8d84da
## Why
Turn completion precedes active-turn cleanup, so the remote compaction test must wait for the thread to become idle before injecting its history fixture.
## What changed
Register the `ThreadIdle` lifecycle contributor and wait after the initial turn in `remote_compact_v2_rewrites_multiple_trailing_function_call_outputs`, covering both manual and automatic compaction cases.
GitOrigin-RevId: 1593b212db0e07b1457f090b5ac7ba2313a28360
## Why
Command execution analytics lack the observed sandbox backend. Older execution servers may omit this information, so an unknown backend must remain distinguishable from an explicitly unsandboxed process.
## What changed
- Carry optional `sandbox_type` metadata through command execution items and emit its metric tag as `sandbox_backend` in analytics.
- Propagate the observed backend through unified execution completion and failure events, including asynchronous exits.
- Preserve missing backend information as `None` and mark executed user shell commands as `Some(SandboxType::None)`.
- Exclude the metadata from serialized command items and generated schemas and TypeScript types.
## Testing
Extend tests for missing and explicit executor backends, backend propagation on failed execution, and analytics payloads, including platform-specific backend tags in app-server integration coverage.
GitOrigin-RevId: 178fe46824a6194910802ec02168ed40ee0b2019
## What changed
Add `features.multi_agent_v2.disable_direct_message`, defaulting to `false`. When enabled, omit `send_message` and `followup_task` while preserving spawning, automatic child results, and the remaining agent management tools.
Require an available message-board `post` tool when this option is enabled for sessions using multi-agent v2 collaboration tools, exempting internal worker sessions.
## Testing
Extend configuration parsing tests and run the message-board subscription/resume scenario with direct messaging both enabled and disabled. Verify post search, subscription behavior, and which collaboration tools are exposed.
GitOrigin-RevId: 72ec22ef0b92fa81e02cdeb058d8b4f93aca3be6
Add a regression test that fails `exec_command` with a missing working directory, pauses command completion, and interrupts the turn before releasing completion.
Verify that the command emits exactly one start and completion, retains its failure status and launch diagnostic, and persists the completion in the rollout. Check that reconstructed history includes the failed command in the interrupted turn.
GitOrigin-RevId: 5962f0791b298ebb05e752138d02b0e0b3af4c63
## Why
V2 tools and model context need to use the controller's agent tree even when the session's local runtime has no registry entries.
## What changed
- Add target resolution and direct-child path lookup to `AgentControl`.
- Move lazy root registration into the controller's resolution and listing methods.
- Build V2 subagent context from controller-provided paths, keeping formatting and size limits in the session layer and preserving loaded-first ordering.
## Testing
Extend the V2 spawn and messaging test with an empty session-local registry to cover relative-path resolution, message delivery, and subagent environment context through the controller.
GitOrigin-RevId: c935b34a6d3314e968ba451ff981cf2a223bbfa8
## Why
When unified exec cannot create a process, command lifecycle events are missing, leaving clients without a command failure notification.
## What changed
Emit start and failure events for terminal process-creation errors in both regular and zsh-fork execution. Report no process ID, an exit code of `-1`, zero duration, and the launch diagnostic, while retaining plugin attribution. Once event publication starts, let it finish even if the caller is cancelled.
Preserve approval rejection handling and retryable sandbox denials.
## Testing
Extend app-server tests to cover pipe and PTY launch failures, plugin attribution on failed launches, and zsh-fork launch failures after approval. Assert failure metadata and check for duplicate lifecycle notifications while retaining approval-decline coverage.
GitOrigin-RevId: 26ed191fc69b903ea4710dd1a6c3b031e8caa4eb
## What changed
- Store `Arc<dyn AgentControl>` in session services and route agent tools, turn admission, usage accounting, completion notifications, and shared settings through the trait.
- Add `AgentControlInit` so delegated and guardian sessions inherit the parent's controller and local runtime.
- Move local registry and context helpers to `LocalAgentRuntime`, keep resume, close, inspection, and status subscriptions on the local controller, and simplify synchronous and infallible trait methods.
GitOrigin-RevId: ad3f213eb483ac524bde56d769f20a78f20989a0
## What changed
Run `AGENTS.md` and thread-instruction refresh concurrently with capability discovery, MCP setup, and tool construction. Box both preparation futures to keep them off caller stacks while they are live together.
Finish delivering returned instruction warnings even when tool preparation fails or is cancelled. Preserve instruction-error precedence and publish the selected-plugin snapshot only after both branches succeed and cancellation is checked.
## Testing
Add tests covering concurrent preparation, warning delivery on tool failure and cancellation, instruction-error precedence, and plugin snapshot publication. Verify that cancellation does not repeat consumed warnings on the next capture.
GitOrigin-RevId: 6b2d7b091aae2dba67ad154a19bdb0ed0f96f6f7
## Why
Retry timing assertions can fail if the test is descheduled before retry telemetry is emitted, and parallel tests can leave shared tracing callsites disabled for the test subscriber.
## What changed
- Measure retry intervals from the failed request, filter HTTP observations to `/responses`, and track WebSocket stream requests as well as connections.
- Keep a tracing interest-cache guard alive and rebuild callsite interest when installing the telemetry capture.
- Reserve the connection-failure test's port with a bound socket until the recovery server starts listening.
- Wait for the WebSocket warmup request and assert `generate: false` before submitting user input in connection-limit, rate-limit, and overload tests.
GitOrigin-RevId: bba39ea2ac29ac8553ae6184139382f1e6cdc7ac
## What changed
- Add `environments` to `TurnSettingsUpdate` to replace the selection for subsequent steps without changing future turns.
- Capture model settings and environments together so combined updates apply or reject atomically, while existing steps retain their captured selection.
- Validate environment IDs, working directories, configuration ownership, and permission requirements against the running turn's selections.
- Preserve executor startup behavior when switching environments and use the step's local working directory for tool hooks.
## Testing
Add coverage for workspace switching and restoration on the next turn, atomic model and environment updates, permission validation, executor connection waits, and replacement of pending environment selections.
GitOrigin-RevId: 02b5c57a78fd594b2aed84fc09d9e99eb97be28c
## Why
Thread permission updates could affect later steps of a running turn. Keep inherited environment settings consistent throughout the turn and apply saved updates when the next turn starts.
## What changed
Store active thread defaults alongside selected environments and refresh them when activating a new turn, even when its environment selections are unchanged. Resolve new selections from those active defaults while preserving owner-provided configuration, selection workspace roots, and the local Windows sandbox type.
## Testing
Add a regression test that changes permissions during a paused turn and verifies that both steps retain restricted filesystem access while the next turn receives unrestricted access. Update session and MCP elicitation tests to check that permission changes take effect on the next turn.
GitOrigin-RevId: 37ee44198fa40c138d140974dc90c4177d8c1f4c
## Why
AWS credential discovery, analytics, and telemetry used clients that did not share the application's network policy. These requests need to honor destination restrictions and permission revocation.
## What changed
- Route AWS credential and region HTTP requests through the shared HTTP client, and check the signing destination before loading credentials. Skip discovery for static access keys with an explicit region.
- Apply account-scoped policy to Bedrock authentication. Require unrestricted policy for credential exporters and reauthentication commands, and cancel active work when permission is revoked. Document that AWS profile `credential_process` network traffic remains outside the application's HTTP policy.
- Send analytics through the authenticated account's HTTP client factory.
- Guard OTLP log, trace, and metric exports with revocable permits, disable them under destination restrictions, and make managed HTTP exports cancellable. Suppress global Statsig settings while managed policy is active.
## Testing
Add coverage for metadata credential request cancellation, allowed and denied SigV4 destinations, AWS credential precedence and endpoint configuration, and blocked credential exporter recovery. Update telemetry tests for account transitions and managed-policy Statsig suppression.
GitOrigin-RevId: d8a2018bfbbe971ec430699b0d3f86a7a9e1e072
## What changed
- Load `application.network` requirements at startup and explicit config/account reloads, applying local policy before authentication and cloud configuration bootstrap.
- Block traffic when policy loading fails, cancel requests that a new policy no longer permits, and reject configuration loads based on superseded policy snapshots. Local requirements edits take effect on the next explicit reload or restart.
- Bind authenticated clients to the current account and revoke them when account ownership changes. Carry policy enforcement through backend requests, realtime connections, workload identity exchanges, and code-mode gRPC streams while preserving gRPC trailers.
- Treat denied credential refreshes as policy errors without retrying them or invalidating stored credentials.
## Testing
Add regression coverage for startup restrictions, reload ordering, cancellation after restrictive or malformed requirements edits, account revocation, gRPC destination denial, workload identity cancellation, and credential preservation after denied OAuth refresh.
GitOrigin-RevId: 0cb4c720a906397e9df06675f01ecf60d741101f
## What changed
- Switch the GPT-6, GPT-5.6, GPT-5.5, and auto-review catalog entries to `shell_command` and expand their plan availability.
- Mark `gpt-6-astra` as supporting reasoning-effort updates and disable its experimental-context flag. Add explicit capability and instruction defaults to other entries.
- Update Astra's messaging guidance to recognize authorization from explicitly invoked skills or plugins, with attribution in the final response, and simplify its Default-mode clarification instructions.
- Revise auto-review guidance on autonomy, assumptions, and actions within the user's requested scope.
- Refresh seven scenario snapshots to reflect the updated prompts.
GitOrigin-RevId: b7ed8c413f6451008c982024506009b170e6311e
## Why
A single blob upload failure previously aborted the file upload, even for a temporary `503` response or an interrupted stream.
## What changed
- Retry `503` responses and timeout, connection, body, or request errors, with at most five attempts within a shared five-minute deadline.
- Honor `x-ms-retry-after-ms` and `Retry-After`, falling back to backoff when no valid server delay is available.
- Reopen the contents for each retry while reusing the same file record and upload URL. Preserve the initial read permission check and reopen MCP file streams under the same sandbox policy.
- Record retry, recovery, and terminal failure events with a fresh client request ID for each attempt.
## Testing
Add coverage for recovery after `503` responses and interrupted streams, attempt and deadline limits, non-retryable responses, retry delay parsing, and unique request IDs. Extend the restricted-read MCP upload test to verify that both attempts send the complete file contents.
GitOrigin-RevId: 78089ecfd5076313f5784cbbc864df12d082e3b1
## Why
Destination restrictions and policy revocation must remain effective during redirects, response body reads, and established WebSocket traffic. Policy denials must also survive error handling so callers do not retry them or report a revoked operation as successful.
## What changed
- Route managed HTTP clients through a shared `RequestBuilder` and policy-aware execution, checking each redirect destination before route resolution and retaining a network permit while consuming response bodies.
- Guard WebSocket connection setup, reads, and writes with revocable permits, including independent wakeups for split readers and writers.
- Preserve `TransportError::Policy` through HTTP, SSE, and realtime error handling, and treat policy denials as non-retryable.
- Keep the supplied network policy in plugin startup HTTP requests and propagate response body failures from backend and plugin requests.
## Testing
Add regression coverage for rejection before connecting, revocation during redirect routing and streamed body reads, split WebSocket revocation, realtime writer error propagation, and revoked plugin upload responses.
GitOrigin-RevId: fba36700444c98a8364c09b4dc5452c4d78a90fb
## What changed
Add `backend_reasoning_status`, disabled by default, to relay public reasoning summaries during active, server-managed realtime V3 delegations.
Use the last non-empty summary from each completed reasoning item, truncate it to 256 bytes at a character boundary, and append it as `[STATUS]` context on the `commentary` channel. Discard queued updates if their delegation is no longer active.
## Testing
Add an integration test covering enabled and disabled behavior, selection of the latest non-empty summary, exclusion of raw reasoning and partial summaries, and delivery without triggering `response.create` or changing the model's reasoning-summary setting.
GitOrigin-RevId: 75ce87dbbbab15a6d9d0ad0b23737738837192fd
## What changed
Add the default-off `features.prefer_mxc` flag to select MXC for local Windows execution when native support is available and effective network settings do not explicitly forbid local binding. Otherwise, retain the configured backend and legacy setup behavior.
Resolve the preference during config loading and use the effective local backend for execution, network proxy setup, sandbox diagnostics, and `windowsSandbox/readiness`. Preserve the configured backend for remote executors and `config/read`. Explicit `windows.sandbox = "mxc"` remains strict, and command failures do not trigger backend fallback.
## Testing
Add coverage for preference resolution, startup readiness without rewriting configuration, local and remote backend selection across environment updates and child threads, and workspace-write permission context in an agent turn.
GitOrigin-RevId: b51178f0371d38ebb58e41af54a068fca67fa316
## Why
Restoring persisted V2 agent identities reads descendant metadata serially, making each storage read wait for the previous one.
## What changed
Read up to eight descendants concurrently while registering identities in graph order, preserving path and nickname reservation order. Skip identities already registered and continue restoring after individual read failures.
## Testing
Add a cold-resume regression test that gates child metadata reads to verify overlap, completes reads out of order to check deterministic path reservation, and injects a read failure. It also verifies that child runtimes remain unloaded until requested.
GitOrigin-RevId: ae90f24875966be83208884937621a6a9eb0d848
## Why
Resuming a compacted thread should use the compaction and its newer records without depending on older turn contexts or restoring stale state from before the compaction.
## What changed
- Stop paginated model-context scans at the newest compaction with `replacement_history` and `window_number`. Fall back to full replay if the newest compaction lacks either field.
- Align reconstruction with that boundary and restore `last_started_turn_id`, previous turn settings, and the multi-agent version from compaction resume metadata. Allow newer completed turns to override the saved settings.
- Keep canonical session metadata alongside the bounded replay and use the same scan boundary for subagent rollout migration.
## Testing
Add coverage for cold resume after mid-turn compaction, bounded/full replay equivalence, missing companion state, settings precedence, and incomplete-compaction fallback.
GitOrigin-RevId: f836464bb5cadd9be4a4e05b5d1679223713fc87
## Why
`invalid_prompt` responses were classified as generic invalid requests, losing the server's specific error classification.
## What changed
Add `InvalidPrompt` variants to the API and core error types and serialize the core protocol classification as `invalid_prompt`. Recognize the code in HTTP 400 responses, wrapped WebSocket errors, and SSE `response.failed` events while preserving server messages and keeping the error non-retryable. Map it to `other` in the app-server v2 protocol.
## Testing
Extend coverage for typed error mapping, missing and blank messages, protocol conversion, and guardian retry handling. Exercise HTTP and SSE failures in core integration tests, asserting the error message, serialized classification, and a single request without retry.
GitOrigin-RevId: 5d9a299a013b06158a4dc27a4054f3dbc5fd0f4d
## Why
Cloud skill discovery ran on every turn, even when the Apps resource generation and authentication scope were unchanged.
## What changed
- Reuse warning-free catalogs, including empty catalogs, while their authentication scope and Apps resource cache key remain current.
- Refresh after invalidation and retry failed or partial discovery on the next turn.
- Reject discovery results if the Apps resource cache key changes during discovery.
## Testing
Update lifecycle tests to verify cached turns avoid catalog listings and skill reads, while connection and authentication changes trigger refreshes. Update the referenced-resource test to verify partial discovery retries on the next turn without an explicit MCP refresh.
GitOrigin-RevId: ac47d5202d76703c4946afef3b1a48eaf05b54c2
## What changed
Emit `<recommended_plugins>` with the `developer` role and append it to the shared developer message after other context. Retain recognition of legacy user-role recommendations in existing rollouts.
## Testing
Add a startup context snapshot and assertions that recommendations share the developer message with permissions instructions. Update core and app-server tests to check developer-role recommendations, including across successive model requests.
GitOrigin-RevId: 0326ff347e86ec38b948f93e39e90e6a88a8730c
## Why
Forked subagent startup serializes history persistence and spawn-edge writes. Cancellation during startup can also leave a provisional child behind.
## What changed
- Defer copied-history durability so it can run alongside spawn-edge persistence, while still awaiting both before submitting the child's initial input.
- Commit agent and residency reservations and notify clients only after initial input is accepted.
- Guard provisional children so cancellation or startup failure removes and shuts them down, discards their stored state, and closes their spawn edge after any pending edge write finishes.
## Testing
Add coverage for cancellation at the child-history durability barrier, checking child termination, removal, and edge closure. Extend fork-context tests in legacy and paginated history modes to verify inherited context can be read from storage after spawn acknowledgment without flushing the live child first.
GitOrigin-RevId: e02dda57efc32b7237bb7af0ce5e5844922890c3
## What changed
Skip the thread store title lookup when initializing an ephemeral fork, leaving its thread name unset.
## Testing
Add a regression test that forks an ephemeral thread from history and verifies that the in-memory thread store's `read_thread` count does not increase.
GitOrigin-RevId: 81180c4a836c932584d2cb94c0816eae33b04af3
## Why
Callers need to interrupt a specific active turn without discarding queued input. Tool callbacks must be able to await the interruption decision without blocking task cancellation.
## What changed
- Add `CodexThread::interrupt_if_no_pending_input` and `Op::InterruptIfNoPendingInput`.
- Check the turn identity and pending user input or mailbox items before taking the active task. Leave the turn running for stale or abandoned requests.
- Acknowledge the decision before joining cancellation, and unblock pending submissions when the active task is cancelled.
## Testing
Add regression coverage for successful interruption, stale turns, preservation of queued user input and agent mail, abandoned requests, and cancellation while the submission queue is full.
GitOrigin-RevId: 42e31c09369fb070ba1b4b3c64ef45334dd872d8
## What changed
- Add `gpt-6-sol` and `gpt-6-luna` catalog entries and refresh model descriptions.
- Offer migrations from `gpt-5.5`, `gpt-5.6-sol`, and `gpt-5.6-terra` to `gpt-6-sol`, and from `gpt-5.6-luna` to `gpt-6-luna`.
- Retarget retired `gpt-5.4` and `gpt-5.4-mini` selections to GPT-6 Sol and Luna, respectively.
- Recommend `gpt-6-luna` in the rate-limit switch prompt.
## Testing
Extend migration tests to cover the new targets, their default reasoning effort, and prompting again after a previously acknowledged migration to an older target. Update model-picker and rate-limit prompt snapshots.
GitOrigin-RevId: d3a093d18ce44a903383504ab8f5cbbc911d602d
## Why
Compaction companion records do not represent all resume state, including the last started turn and previous turn settings. The selected multi-agent runtime also needs a persisted value when no companion turn context is present.
## What changed
- Add optional `resume_metadata` to `CompactedItem`, recording the multi-agent version, last started turn ID, and previous turn settings. Preserve the distinction between absent metadata and explicitly empty values while retaining compatibility with older records.
- Capture this metadata under the settings persistence lock alongside the compaction checkpoint.
- Rewrite inherited metadata to use the child agent's runtime, and clear previous turn settings when the child must rebuild context.
- Clear pending continuation state before delivering acceptance of standalone settings updates, while holding the persistence lock.
## Testing
Add coverage for metadata round trips with empty values, legacy reader compatibility, checkpoint companion records, inherited fork metadata, and continuation invalidation while settings event delivery is blocked.
GitOrigin-RevId: f30b7feaa7e2fdb5b65fc3c53b37fd7a7fe27903
## What changed
Render unordered bullets as `•` and task markers as `☐` or `☑`, preserving ordered numbering and continuation indentation in streaming and completed Markdown. Add `tui.rendering.lists`, enabled by default; setting it to `false` retains hyphen bullets and textual task markers.
## Testing
Add snapshot coverage for nested, ordered, quoted, and wrapped task lists, plus code and escaped markers. Add character-by-character streaming tests that compare incremental and emitted output with full rendering, with list rendering enabled and disabled.
GitOrigin-RevId: df9209d8c42f277dd2a2d7073ea19a6feb7dd706
Steve Coffey