## 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
## 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
## What changed
Update `extra_policy_reaches_guardian_review` to expect a retained user
instructions section before the transcript, including the source-order notice
and the original user request. Adjust the subsequent snapshot item numbers.
GitOrigin-RevId: 9e57f9bb7cdc9318787d083bf4350143a1353287
Verify that unsubscribing from a message board thread remains effective
after posting to that thread and resuming the session. The runtime test
checks that replies from a child agent produce no `CHANNEL_POST` notices
while unsubscribed and that explicit resubscription restores delivery.
Use gated streaming responses to keep the recipient active during each
reply and drain worker completion messages before checking notices.
GitOrigin-RevId: fe2695a46722a94e6fca86a3d3bd49c0b8bb7ee7
## What changed
Mark `guardianv2.thread_context` as stable and enable it by default for synchronous and asynchronous Guardian reviews. Keep it independent of the Guardian v2 `enabled` toggle and preserve explicit configuration and profile overrides. Update the configuration schema documentation to match.
## Testing
Update coverage for default configuration and sender user messages, review prompt snapshots, history retention across compaction, and checkpoint provenance. Assert that later user input invalidates an in-flight review's authorization. Keep legacy transcript budgeting coverage by explicitly disabling thread context in that test.
GitOrigin-RevId: 19afd34d7bfc0ee36bbf878089c68b732a21bc6a
## What changed
Add a V1 spawn regression test that removes the child from the thread manager during startup, before spawn reports its settings. Verify that the completed spawn event retains the role-configured model and reasoning effort, nickname, and role even when the child can no longer be looked up.
Also verify that the child receives its initial input with the effective settings and the parent receives a successful spawn result.
GitOrigin-RevId: 5e94e3ddb0feda0eaaa86e7539ef8c6720176f88
## Why
Remote compaction v2 excluded descendant progress messages from retained history but kept `CHANNEL_POST` messages from those same agents.
## What changed
Treat descendant `CHANNEL_POST` messages like `MESSAGE` progress updates when selecting history to retain after remote compaction v2.
## Testing
Extend the remote compaction test to verify that a child channel post is included in the compaction input and omitted from the follow-up request.
GitOrigin-RevId: 204bf44b8cddf1e6dc1e48234f51d4ac2aaf2e9f
## Why
Accepted inter-agent messages can still be waiting in the submission queue when a worker appears idle. Evicting that worker can lose the queued work, while cancelling an eviction caller can leave shutdown unfinished and allow delivery to a closing runtime.
## What changed
- Pin V2 recipients until queued submissions are handled or dropped, and verify that delivery targets the registered runtime.
- Move `Submission` into core so it can carry the residency guard through queue handoffs.
- Give eviction exclusive access to each runtime and keep it counted against capacity until removal. Run teardown in a separate task so it completes even if its caller is cancelled, and remove registry and residency entries together.
## Testing
Add a regression test covering queued follow-up delivery, eviction refusal while mail is pending, cancelled eviction completing teardown, rejection of late delivery, and capacity reuse after removal.
GitOrigin-RevId: d6de3d68cb6b911942e9ddfc05c65b3741b796b2
## Why
Channel and thread subscriptions, or explicit `agents_to_notify`, could cause agents to receive notifications for their own posts.
## What changed
Exclude the author from notification recipients, even when explicitly targeted. Preserve the author's subscriptions so replies from other agents still reach them, and document this requirement in the board API.
## Testing
Update board tests to cover explicit self-targeting, subscribed authors, and delivery of other agents' replies. Update the model-context scenario and snapshot to verify posts remain searchable without a `CHANNEL_POST` self-notification.
GitOrigin-RevId: 0b2558e7df79122a6da06ad592f9735ba260cce1
## Why
MCP requests pass through background transport queues, so HTTP requests need the caller's trace context carried explicitly to preserve trace ancestry.
## What changed
- Capture W3C trace context in request metadata for tool and resource operations, custom requests, and event streams.
- Restore that context in an `mcp.http.request` span around HTTP POSTs, linking outgoing HTTP traces to the originating request.
- Preserve application metadata while replacing trace fields with the current caller's context and removing stale `tracestate`. Read the SDK's merged metadata so extension fields retain precedence over parameter metadata.
## Testing
Add a unit test for metadata merge precedence and an integration test covering concurrent paginated requests, tool calls, custom requests, and tool-call continuations across legacy and `2026-07-28` protocol modes. Verify HTTP trace ancestry, metadata preservation, and removal of stale `tracestate`.
GitOrigin-RevId: 0b22cd75f31f9fcb855b27fa8d34ecdffd6e3549
## Why
Standalone web search selected a proxy route only for the initial endpoint. Redirect destinations can require a different system proxy route.
## What changed
- Add `RouteAwareClientPool` support to `ReqwestTransport` for both buffered and streaming requests, and use it for standalone web search.
- Preserve default Codex headers and Cloudflare cookie handling across routes, while retaining the default client behavior when route-aware handling is disabled or Codex is sandboxed.
- Share request construction so URL authentication and header precedence follow `reqwest` semantics, applying them once before redirects and TLS retries.
- Map route-aware failures to transport errors and remove request URLs from those errors.
## Testing
Add regression coverage for redirects through distinct proxies, preservation of POST bodies and default headers, URL authentication and header precedence, and transport error classification without URL leakage.
GitOrigin-RevId: 19a10a62118846db09dd95265dc277e54aac09ef
## Why
Injecting context before the first turn currently forces a full flush. Stores need a preparation checkpoint that can leave disposable context in memory, while local storage must keep prepared context durable before the first user input.
## What changed
- Add `PersistContext::ThreadPreparation` and `CodexThread::checkpoint_preparation()`, and use the checkpoint in `inject_response_items()`.
- Allow stores to defer rollout-derived metadata writes through `record_thread_metadata()`, including during preparation and execution checkpoints. Keep standard metadata updates synchronous.
- Flush local storage at preparation checkpoints so injected context survives restart.
## Testing
Add tests showing that preparation and first sampling can proceed without waiting for durable metadata. Cover prepared context in first and follow-up requests, plus durability before first input and restoration after restart, in both legacy and paginated history modes.
GitOrigin-RevId: 74f6bb1a5f8d47192364b8bba6afd703a3b7d688
## Why
Reaching the pending tool-call limit could evict finished empty cells even though removing them frees no pending-call capacity. This loses the metadata needed to certify an empty tool-call inventory on a later `wait`.
## What changed
Only evict cells with pending calls when reclaiming pending-call capacity. Keep empty cells eligible for eviction when a cell slot is needed.
## Testing
Extend recorder coverage to check empty inventories under pending-call pressure in fresh and resumed sessions. Add a code-mode integration test verifying that `wait` serializes an empty inventory with `tool_calls_complete: true` while another cell has filled the pending-call budget.
GitOrigin-RevId: 559d0b4fdc9864c42a90b7d087eb2a3327272d5c
Refresh the collaboration namespace hash and aggregate tools hash in the
`code_mode_catalog_messages` snapshot.
GitOrigin-RevId: bcfb793ba379760219cb4214d39f9c8bcd01e40c
## Why
Standalone web search used a default HTTP client, bypassing the configured system proxy route when `respect_system_proxy` was enabled.
## What changed
Pass the configured `HttpClientFactory` to the web search tool and create its client asynchronously for the provider's search URL using the API route policy. Export and reuse `SEARCH_ENDPOINT` so route selection and search requests use the same endpoint.
## Testing
Add an isolated regression test with environment proxies removed and a mock system proxy. Verify that standalone web search reaches the proxy and returns its result in the follow-up model request.
GitOrigin-RevId: 3b64803a777b9d1eb0ccf694e06658b0fd562129
## What changed
Remove `ultrafast` from the bundled `gpt-5.6-sol` model's `service_tiers`, leaving `priority` (Fast) as its only advertised service tier. Update scenario snapshots for the affected multi-agent tool definitions.
GitOrigin-RevId: 9a235d8f7ea8a72e71152708d2d602194256d420
## What changed
- Add `auto_review.extra_policy` and the managed `guardian_extra_policy` requirement to supply policy text alongside the resolved tenant policy. Nonblank managed values take precedence; blank values are ignored.
- Render the additional text through `{{ extra_policy }}` in Guardian reviewer templates and append it to the tenant policy for Guardian v2 classification before truncation.
- Preserve placeholder-like text inside supplied policies literally.
## Testing
Add coverage for configuration precedence, blank values, template substitution, and classifier prompts, plus a scenario verifying that managed tenant and extra policies reach the Guardian reviewer together.
GitOrigin-RevId: 180d8d716c63fe96a92ec5bfbd22db4ddccd4f1f
## Why
Attachment stores need the receiving thread ID to support thread-based placement.
## What changed
Add `thread_id` to `UploadRequest` and pass the session's thread ID through image preparation for messages and tool outputs. Include the ID in debug output while continuing to redact attachment bytes.
## Testing
Extend the image rollout test to assert that a new image uploaded after resume carries the resumed session's thread ID. Update the debug-output test for the new field.
GitOrigin-RevId: f81e3bd761dca704064287177b8ecd7175662f07
## What changed
- Add `tools.code_mode` catalog messages for `exec`, `wait`, deferred-tool guidance, and shared MCP TypeScript definitions.
- Render `{{ default_exec_yield_time_ms }}` and `{{ image_helper }}` in `exec` descriptions while preserving runtime tool declarations and the freeform grammar.
- Resolve `wait` descriptions and parameter schemas independently, falling back to bundled parameters for invalid or unsupported schemas.
- Use the active model's Code Mode messages, including after mid-turn model changes. Missing overrides retain bundled defaults; empty text overrides suppress the corresponding text.
## Testing
Add coverage for literal template substitution, runtime section preservation, independent `wait` overrides and fallback behavior, mid-turn model changes, and a yielded cell completing through `wait` with catalog messages.
GitOrigin-RevId: e542a0cd47a7138a414871192cee47790ed1214e
## Why
Remote plugin requests always sent `OAI-Product-Sku: codex`, ignoring the existing `apps_mcp_product_sku` setting.
## What changed
Pass `apps_mcp_product_sku` through plugin configuration and use it for authenticated remote plugin requests, including discovery, search, installation, and sharing. Keep `codex` as the default and include the SKU when comparing remote service configurations.
## Testing
Extend app-server plugin listing and core agent-turn tests to check default and configured SKU headers. Update the CLI worktree test to wait for the user prompt's model request, skipping background title generation requests.
GitOrigin-RevId: 508c9ef9aa3e41b87c92383c3088eb1eb9227fd8
## What changed
- Capture optional `creator_user_id` and `creator_account_id` from authentication when creating a thread, including forks.
- Carry these fields through thread storage, rollout metadata, and a SQLite migration. Leave them absent when unavailable or when reading older threads.
- Preserve recorded creator values across resume and metadata updates. On revert, recover missing rollout values from SQLite before writing replacement metadata.
## Testing
Add coverage for ChatGPT and API-key sessions, resume under another account, forks using current authentication, metadata extraction and upserts, and repeated reverts after creator fields are removed from a rollout.
GitOrigin-RevId: 9839fa42f9392f12226002e2c27d05d5656f5695
## Why
Code Mode callbacks can retain skill tools after another turn becomes active. Looking up the active turn when a delayed skill invocation completes can lose access to the originating turn's metrics and metadata.
## What changed
- Capture and retain the originating `SkillTurnMetrics` when constructing skill analytics.
- Expose turn analytics metadata through the turn extension store and carry it into skill telemetry.
- Add optional turn metadata to `TrackEventsContext` and pass it from app, skill, and plugin usage call sites.
## Testing
Add a regression test that yields a Code Mode cell, starts another turn, and releases both skill reads through a shared barrier. Assert that each `skill_invocation` event retains its originating `turn_id`.
GitOrigin-RevId: aa629dd5f84563d558aa6a86bfbdfc356f1b98e4
## Why
Realtime WebSockets connected directly, bypassing the configured proxy policy for Voice's WebRTC sideband.
## What changed
Pass the configured `HttpClientFactory` into `RealtimeWebsocketClient` and connect through the shared `WebSocketConnector`. Add support for supplying an existing Rustls configuration to preserve custom CA handling and Windows platform trust.
## Testing
Add an integration test that enables `respect_system_proxy`, starts a WebRTC conversation, and verifies that the sideband establishes its session through an HTTP `CONNECT` proxy and closes successfully.
GitOrigin-RevId: d974c9275d7fe29f388d56a9d5d8ce0c483eb8d0
## What changed
- Describe GPT-5.6-Sol as a reliable agentic workhorse for everyday tasks and change its catalog `priority` from `6` to `4`.
- Describe GPT-5.5 as a proven previous-generation model for coding and general work.
- Refresh model picker, migration prompt, and agent tool snapshots to reflect the catalog updates.
GitOrigin-RevId: b39f51c22862b8cef585ed76f3973c9f4b670c27
## What changed
- Record each MCP source and its first turn, including connector and plugin identifiers when available. Cover direct and Code Mode calls, including returned errors and results that are not printed.
- Persist cumulative attribution checkpoints and restore them across compaction, resume, and forks, including forks limited to recent turns.
- Attach fresh attribution to Responses API `client_metadata` under `mcp_attribution`, outside model-visible content. Restrict transmission to allowed OpenAI HTTPS destinations for both HTTP and WebSocket requests.
- Report `attribution_error` for legacy history without checkpoints, malformed or conflicting attribution, and serialized attribution exceeding 16 KiB.
## Testing
Add coverage for source deduplication, checkpoint persistence and restoration, recent-turn forks, direct and Code Mode calls, destination filtering, and the serialized size limit.
GitOrigin-RevId: fd285e152ca9e24bfa000debb20013709d67a86e
## Why
Concurrent credential refreshes could restore a removed environment by overwriting the selection list with stale state. Unpolled snapshot futures could also keep pending configuration alive after an environment was removed.
## What changed
- Protect environment selections with a mutex and update them in place to serialize selection changes, configuration refreshes, and connection listener setup.
- Capture only selection metadata and resolution futures in snapshots so they do not retain pending configuration senders.
## Testing
Add regression tests for removal during credential refresh and cancellation while an unpolled snapshot is held. Strengthen the pending attachment integration test to check that `wait_for_environment` returns the expected environment ID and `ready` status.
GitOrigin-RevId: c6f933e8d3031b05335ddcfed00ab400aa5bad2a
## Why
Message board notifications exposed only post and thread IDs, requiring a read to see any post content.
## What changed
Deliver notifications as `agent_message` items with author and recipient attribution. Include a `CHANNEL_POST` payload with the sender, channel, message and thread IDs, and up to 150 characters of post text. Direct agents to `read_post` when the preview is truncated, and retain recognition of legacy user-role notices.
## Testing
Update the model-context scenario to assert the notification's author, recipient, and preview payload, and update the idle-agent scenario to check for the new notification format.
GitOrigin-RevId: e0e2794be82e38bba47f41fb4fc8128eb5e47619
## What changed
- Replace the built-in orchestrator skill provider with a host-supplied cloud provider, using `cloud` authority and `c` root aliases in skill tools and prompts.
- Add `cloud.skills.enabled`, defaulting to true but requiring a supplied provider. Keep `orchestrator.skills` accepted as a legacy no-op setting, and remove the app server's automatic orchestrator provider registration.
- Discover cloud skills once per turn during cancellable startup. Serve catalog snapshots to prompts and tools without triggering discovery or retries.
- Scope cached catalogs and resources to authentication state. Preserve them on refresh failures within the same scope, invalidate them when that scope changes, and reject late discovery or read results from replaced cache generations.
- Reuse executor discovery catalogs only when successful discovery inputs and bundled-skill settings match.
## Testing
Add coverage for per-turn refresh, skill removal, same-account failures and reconnects, authentication changes, and stale in-flight results. Update configuration and tool tests for cloud authority, provider gating, and resource reads without an executor.
GitOrigin-RevId: c57e38ec7dcc880c0d4c8a2995adfd3e28301079
## Why
`TurnComplete` precedes active-turn cleanup, so injecting follow-up history immediately afterward can race with cleanup.
## What changed
Register the `ThreadIdle` lifecycle contributor in `review_preserves_user_instructions_until_request_budgeting` and wait for the thread to become idle after the initial and follow-up turns.
GitOrigin-RevId: 1ae6c80593a71d331c5c6ddf85bbe10822a68afe
## Why
Guardian can lose a confirmed User Messaging message from its parent context when a `PostToolUse` hook blocks the result or is cancelled. The message has already been sent and remains relevant to interpreting the user's authorization.
## What changed
Capture confirmed message text after input-rewriting hooks in shared per-call state before awaiting post-tool processing. Attach that evidence to the response metadata even when dispatch returns a blocked or aborted result, while keeping post-tool hooks cancellable. Calls cancelled before delivery confirmation contribute no message evidence.
## Testing
Extend Guardian subagent authorization coverage to verify retained messages after post-tool hook blocking and cancellation, and their absence when cancellation precedes delivery confirmation.
GitOrigin-RevId: 9abb7959980eada20d0fb5c0b3a4a8669e4cd0a3
## Why
Extension tool calls eagerly copied and converted conversation history even when the tool never read it.
## What changed
Retain a shared invocation-time snapshot and defer conversion to raw response items until `ConversationHistory::items()` is called. Cache the result across clones with `LazyLock`, and keep debug formatting from triggering materialization. Release unrelated history metadata when capturing the shared items.
## Testing
Extend the extension executor test to verify that history first read after a later turn still reflects the invocation-time snapshot, in both legacy and paginated history modes. Update the history API test to check that shared items preserve their envelopes.
GitOrigin-RevId: c737b765b7e4889735dc78e12d685d36e854570b
## Why
Guardian's retained root context appended assistant messages after user evidence and omitted questions sent through User Messaging. This could leave subagent authorization reviews with missing or misplaced conversational context.
## What changed
- Record assistant messages and function calls in the same order sequence as accepted user inputs, then merge retained review context by recorded position while prioritizing user evidence within the message budget.
- Capture bounded User Messaging text after input hooks when a send succeeds, and match it to the original call for assistant context.
- Label assistant context without a recorded position explicitly and clear parent assistant and tool positions when forking agent history.
- Clarify that recorded order does not establish delivery order or pair ordinary replies with questions; assistant messages remain untrusted context.
## Testing
Add coverage for hook-rewritten messages, failed or unconfirmed sends, queued replies with delayed tool results, ordering across resume, and removal of inherited assistant positions from forked history.
GitOrigin-RevId: ac717cf0f5efe4b05c18f2d8370dd48453ac4e35
## Why
Message-board tools hardcoded the `collaboration` namespace and used a different namespace description from the multi-agent tools. This ignored custom namespace configuration and caused conflicts under strict tool collision checking.
## What changed
- Use `multi_agent_v2.tool_namespace` and the shared multi-agent namespace description for message-board tools, resolving the namespace at runtime startup.
- Support unnamespaced tool specifications when no namespace is supplied.
- Remove hardcoded `collaboration` prefixes from message-board notifications.
## Testing
Add app-server integration coverage for the default `collaboration` namespace and a configured `agents` namespace with strict collision checking enabled. Verify that both tool families are advertised together and that `get_channels` executes through the installed extension.
GitOrigin-RevId: fef7be51ea2a84bbdb6d3491606db442ed4e6ea3
## What changed
- Register the existing message-board tools with the app server through a lifecycle extension, gated on `agent_message_board`, multi-agent v2, and non-ephemeral sessions. The new feature flag is disabled by default.
- Bind tools to each agent's identity and share the SQLite-backed board across the agent tree and runtime resumes.
- Use the runtime clock for posts and deliver ID-only notifications to running agents, with tools to retrieve post contents. Skip inactive recipients without starting them or queuing notices.
- Emit a warning and leave board tools unavailable if initialization fails.
## Testing
Add runtime scenarios and a context snapshot covering feature gating without creating storage, posting and searching, active-only notifications, sharing with child agents, persistence across resume, and clock failure without channel creation.
GitOrigin-RevId: a81bd85cd372b0d122ba375ed1a1bfd3ba3a3b7c
Adam Perry @ OpenAI