## Why
Configured MCP servers must not be able to request user verification, even when they reuse the hosted apps server name. Local verification identity selection also needs to distinguish a user's workspace memberships.
## What changed
- Advertise `userVerification` only to the host-owned apps MCP server and cancel verification requests from other servers before prompting the client.
- Add `CodexAuth::get_chatgpt_account_user_id()` to read the access token's opaque `chatgpt_account_user_id` only when its workspace matches the selected account. Missing or malformed claims return no identity, without falling back to another user ID or breaking ordinary authentication.
## Testing
Add coverage for capability filtering, rejection of configured servers including those using the hosted apps name, and account-user identity selection with malformed or mismatched claims. Add an MCP round-trip test showing that verification waits for a client response even in full access mode, returns the supplied proof, and discards response metadata.
GitOrigin-RevId: 156e83d5a0302c013b85e564b46b4bfe858cbdb0
## What changed
Advertise the experimental `codex/auth-change` capability for stdio MCP connections with an auth manager. When the server opts in, send `notifications/codex/authChanged` after initialization and on subsequent auth changes, with credential and owner generation counters and no credentials.
Track owner changes separately from credential refreshes so consumers can detect login, logout, or user, workspace, and auth-mode changes even when notifications coalesce. Treat credential changes with incomplete owner identity as owner changes as well.
Tie the notification watcher to the managed client's lifetime, limit each send to five seconds, and close the connection if a subsequent notification fails.
## Testing
Add tests for credential refreshes versus owner changes, coalesced logout and account switches, capability opt-in, notification payloads, and watcher cleanup.
GitOrigin-RevId: 35a99f5252bd48ca60a71fbdd1f708a8158e812c
## Why
Device-authenticated verification needs an app response outside automated approval and review. Previously, MCP user-verification requests were always cancelled.
## What changed
- Add typed `openai/userVerification` elicitations carrying a title, description, and challenge through core and app-server.
- Route verification to one connection enabled by trusted host activation. Restrict responses to that owner, exclude requests from replay, and cancel on disconnect or authentication changes, including account switches away and back.
- Return proofs in `content`, discard response metadata, and cancel malformed acceptances. Suppress verification response logging and analytics, and send only a generic verification notice to realtime.
- Keep the mode experimental and exclude it from stable schema exports. Capability advertisement remains disabled, and the TUI cancels verification requests.
## Testing
Add coverage for owner isolation, disconnect and authentication races, proof response handling, automated-review bypass, inactive-host cancellation, stable schema filtering, and realtime payload exclusion. Update the MCP integration test to verify that an activated request holds the tool until the client responds.
GitOrigin-RevId: c8c7b6691a3f7756682bbcca9def1df0d1feb906
## What changed
- Handle `openai/userVerification` requests through `openai/elicitation/create` when the client advertises `userVerification` support.
- Validate request fields, size limits, and base64url encoding. Require a correctly shaped, bounded proof for acceptance; cancel invalid acceptance responses and discard proof material on decline or cancellation.
- Handle request and service cancellation, including cancellation received before request dispatch. Bound early-cancellation storage and cancel new verifications when capacity is exceeded.
- Keep verification inactive in Codex: cancel requests without prompting until the typed app-server and UI path is available.
## Testing
Add tests for request and proof validation, malformed modes, cancellation races and capacity limits, timeout-pause cleanup, and independent concurrent requests. Add integration coverage showing that verification does not prompt or prevent tool and turn completion before activation.
GitOrigin-RevId: 6313c1be40fae0b33cc3ce0f8fe025b4124ed2ef
## Why
Refreshed Apps catalogs need to survive connection reuse. Catalog revisions scoped to the connection set can lose refreshed tools during reconciliation and invalidate prepared calls for unrelated servers.
## What changed
- Store tools, revisions, and refresh coordination on each MCP client, and key cached bindings by client identity and revision.
- Preserve existing binding snapshots while rejecting stale calls before preparation. Wait for active calls to finish before publishing a refreshed catalog.
- Add `CodexThread::refresh_codex_apps_tools` to reconcile the runtime and return the refreshed client's raw Apps inventory alongside tool names eligible under that runtime's generic MCP policy. Keep hidden and disabled tools in the inventory for callers to apply app-specific policy.
## Testing
Add regression coverage for refreshed catalogs surviving client reuse, unrelated calls remaining valid, binding cache invalidation, and refresh snapshots retaining the client's own inventory when another client wins the shared-cache race. Update stale-call and preparation tests to use client-owned catalogs.
GitOrigin-RevId: f2308c81f7474eb31f3380c091c977030123cda2
## Why
An empty tool map does not distinguish a successfully returned empty catalog from a server whose startup or tool discovery failed.
## What changed
- Add nullable `toolsError` to each `mcpServerStatus/list` entry when no catalog is available because startup or tool discovery failed.
- Keep `toolsError` null for returned catalogs, including cached and empty catalogs, and continue returning healthy servers when another server fails.
- Update the protocol schemas and generated TypeScript type.
## Testing
- Extend the app-server status integration test with a broken MCP server and verify its error without losing the healthy server's inventory.
GitOrigin-RevId: 30b4ca4d9a45cec6998f5f626d3fddbee90a525d
## What changed
- Honor `McpOAuthRefreshMode::Coordinated` for streamable HTTP MCP connections by letting RMCP refresh and persist credentials through the pinned credential store.
- Reread credentials while holding the refresh lock, persist refreshed tokens before retrying requests, and serialize login and logout writes with in-flight refreshes.
- Keep OAuth preparation outside MCP operation and handshake deadlines, and allow refresh persistence to finish if the initiating caller is cancelled.
## Testing
- Cover coordinated startup refresh, concurrent refreshes, `401` retries, credential mutation races, provider timeouts, and caller cancellation.
GitOrigin-RevId: 100ae788048087be23e26bb43f868b1fcebb007a
## Why
Selected plugin MCP servers may be skipped after the optional startup grace
period. When a user explicitly mentions a plugin or MCP server, the turn should
continue waiting so the requested tools are available to the model.
## What changed
- Track explicitly mentioned plugin IDs and MCP servers across later samples,
steered input, and same-turn restarts.
- Require matching selected-plugin MCP servers to finish startup before
capturing the tool catalog, while leaving unmentioned servers optional.
- Match `plugin://` identities independently of display names and ignore
targeting query parameters such as `app` and `browserFamily`.
## Testing
Added coverage for linked and structured plugin mentions, direct and batched
capability discovery, delayed environment attachment, steering, and same-turn
restarts.
GitOrigin-RevId: c509ef8df45df1a7edb0da6afdb2682dc53a4de8
## What changed
- Log failed MCP server startup outcomes once per startup attempt, including failures during discovery that do not emit startup notifications.
- Preserve the full error chain when converting startup failures into cloneable outcome errors.
GitOrigin-RevId: 54bbf2abaf3329d9828b2d2bc5d877fddc2917e1
## What changed
- Add the under-development `mcp_oauth_refresh_coordination` feature and pin its selected refresh mode to each MCP connection.
- Treat the refresh mode as part of OAuth connection identity so runtime and MCP configuration refreshes reconnect when the mode changes.
- Keep legacy refresh behavior in builds where coordination is unavailable and emit a warning when coordinated mode is selected.
## Testing
- Cover connection replacement when the feature is toggled through both runtime and MCP configuration refresh paths.
GitOrigin-RevId: 89596150f0338e6ede0e712badecea4450831766
## Why
Event subscriptions may need to outlive the MCP runtime associated with a task.
## What changed
- Add `McpEventStreamOpener`, which retains the hosted Apps MCP connection settings and opens each event stream with an independent client.
- Keep subscription cancellation tied to account changes and removal of the task's event server, including when cancellation ownership is forwarded across runtime replacement.
- Expose the opener and cancellation forwarding through `McpResourceClient`.
## Testing
Add an HTTP transport test that shuts down the runtime, refreshes credentials for the same account, and verifies that a new event stream connects with the current authorization and receives notifications.
GitOrigin-RevId: e102aa382e63121661ff0567f7523515e459922d
## What changed
- Add `McpEventStream::open` to construct event stream requests and keep the
underlying `RmcpClient` alive until the subscription completes or is canceled.
- Stop retaining the broader `McpServerConnection` for the lifetime of an event
stream, and remove the connection-returning lookup helper.
- Use MCP event server terminology in event discovery and subscription errors.
GitOrigin-RevId: 7d6c7b8ed9c5447d2d8cda4a077da845fb026173
## What changed
- Allow MCP server names to contain `:`, `@`, `/`, and `.`, enabling names such as `npm:@modelcontextprotocol/server-sequential.thinking`.
- Preserve these names across `mcp add`, `get`, `list`, and `remove`, runtime tool namespaces, and OAuth credential lookup.
- Quote non-bare server names in generated `config.toml` recovery hints and keep similarly escaped OAuth credential names isolated.
## Testing
- Add CLI and runtime round-trip coverage for npm-style names.
- Add snapshot coverage for quoted recovery hints and a regression test for OAuth credential-name collisions.
GitOrigin-RevId: 97e9353cdbc544db4eb2377ddbfa1d2d539b1e04
## What changed
- Advertise `openai/elicitation` form support when the client declares an
object-valued `form` capability, without deriving it from the legacy
`openai/form` capability.
- Handle `openai/elicitation/create` requests in `form` mode and forward their
metadata and opaque schema through app-server as `openaiForm`, preserving
`x-openai-*` annotations.
- Keep legacy form handling independent and have the TUI automatically decline
the new form requests it cannot render.
## Testing
- Add an app-server round-trip test for capability negotiation, request
forwarding, and accepted responses.
- Extend MCP capability filtering coverage for `openai/elicitation.form`.
GitOrigin-RevId: 88f39257bffafe4ee98a9c910e38507843cd7eeb
## What changed
- Add a positive `output_token_limit` setting to each entry under an MCP server's `tools` configuration.
- Apply the most restrictive limit when plugin and user policies overlap, while keeping approval policy independent.
- Carry the effective MCP output budget in conversation history so tool output, post-tool hook responses, and resumed sessions use the same truncation limit.
## Testing
- Cover configuration parsing, serialization, schema validation, and plugin policy merging.
- Cover MCP output below and above the configured limit, post-tool hook responses, and session resume.
GitOrigin-RevId: d0beb4fca9ba6055d9e1d31c137373b465d50d61
## Why
An MCP binding can wait for one server while another connection updates a
shared tool catalog. Preferring the catalog captured before that wait can omit
newly available tools from the first model request.
## What changed
- Recheck the current MCP tool catalog before using the captured fallback.
- Keep the captured catalog when it expires during the wait, while honoring a
server that disables catalog caching.
## Testing
- Cover a shared Apps cache populated by a peer while binding capture waits.
- Cover cache opt-out while capture waits for another server.
GitOrigin-RevId: e4389c7ba23e4d8397dbae0930c9e36ba0a172fb
## Why
Binding capture can wait for multiple MCP servers concurrently. During that wait, a tool catalog may be published by another connection or expire after it has already allowed a server to remain dormant. Re-reading only the current cache could omit those tools or trigger unnecessary startup.
## What changed
- Retain the cached catalog that permits lazy startup for the duration of binding capture.
- Recheck the cache after the optional startup grace so catalogs published while waiting are included.
- Add regression coverage for catalogs published during startup and catalogs that expire while another server is resolving.
GitOrigin-RevId: b5c66831db8f9ebecc79ff25c5b4b0182ad68a2f
## What changed
- Add `mcp_optional_startup_grace_ms` with a default of 1,000 ms to control how long tool catalog capture waits for optional MCP servers.
- Treat a value of `0` as disabling the shared grace, so optional servers use their configured `startup_timeout_sec` instead.
- Apply updated grace values during runtime and MCP configuration refreshes, and reset cached startup deadlines when the configured duration changes.
## Testing
- Cover custom, disabled, refreshed, and shared startup grace behavior in MCP connection and core integration tests.
GitOrigin-RevId: 936196215ed6e0a29c9ec72cfee17663978df8ef
## Why
Plugin MCP trust decisions must describe the exact host-discovered server
registration. Looking up a plugin again by ID can resolve a different root.
## What changed
- Retain the host plugin root in MCP catalog attribution and connection identity.
- Reconnect an MCP server when its attributed plugin root changes.
- Pass the retained root through tool lifecycle attribution and use it directly
when building trusted tool context.
## Testing
Add coverage for catalog identity, connection reconciliation, lifecycle
attribution, and rejecting a different root associated with the same plugin ID.
GitOrigin-RevId: bc92743dd40ab44065a07c3ea972b4956ef8351f
## What changed
- Fetch ChatGPT account access and attach `cyber_trusted_access` under
`openai/entitlementContext` when an installed or selected plugin explicitly
requests it from a local, read-only stdio tool with no arguments.
- Reject caller-supplied entitlement context on direct MCP calls, and fall back
to an `unknown` status when access cannot be verified or the account changes
during the lookup.
- Count entitlement lookup time against the MCP tool-call timeout.
## Testing
- Cover eligible calls plus unowned, remote, HTTP, mutable, argument-bearing,
API-key, undeclared, direct, and account-switch cases in core and app-server
integration tests.
GitOrigin-RevId: 303b61585ef4530276c373d914a2d0ccef1f4ac2
## What changed
- Add `TrustedAccessContext` to fetch account-bound cyber verified-access grants and attach them as host-owned `openai/entitlementContext` metadata.
- Replace caller-supplied entitlement metadata and return an `unknown` status when authentication, identity consistency, response validation, size limits, or the lookup deadline cannot be verified.
- Add `HttpResponseBodyStream::from_chunks` for lightweight in-memory streaming clients.
## Testing
- Cover grant mapping, unsupported authentication, account and workspace changes, malformed or oversized responses, duplicate programs, and lookup timeouts.
GitOrigin-RevId: 343b6a6608c98c45a34939ef507c2183516a11c1
## What changed
- Add optional `McpToolContext` metadata to `ToolStartInput`, exposing the
model-visible MCP tool details and its source classification without exposing
the executable client.
- Classify MCP calls as connectors, configured servers, plugin servers,
executor-selected plugins, or other registrations based on the prepared call.
- Prepare each MCP call before notifying tool lifecycle contributors and reuse
that same call for execution so the callback describes the call that runs.
## Testing
- Cover host-owned connector calls and extension-owned Apps server calls,
including their distinct provenance and executed tool names.
GitOrigin-RevId: efd23f511b1045ffdd96349d621ad62365569b2b
## Why
MCP servers attached to executor environments must retain their owner's
permission profile instead of inheriting the thread-wide sandbox authority.
## What changed
- Resolve and capture a permission profile for each enabled MCP server when
publishing the runtime, and reject calls or elicitations when that authority
is unavailable.
- Use the captured server profile for tool approval decisions, elicitation, and
sandbox metadata, including after runtime refreshes.
- Materialize `:workspace_roots` from `PathUri` values so permissions preserve
the path convention of remote executor environments.
- Give threadless app discovery and resource reads an explicit default
permission profile.
## Testing
Added coverage for per-server elicitation authority, unresolved attachments,
runtime refreshes, restricted tool calls, and foreign-platform workspace roots.
GitOrigin-RevId: 6b188d4b08b29e9971ff7aa68a7785a0cdf9e394
## Why
MCP servers can share an OAuth callback URL. Without a validated issuer or a
server-specific callback path, an authorization response could be associated
with the wrong server.
## What changed
- Use stable callbacks when authorization metadata advertises issuer-bound
responses, and validate the returned issuer before exchanging the code.
- Retain server-specific callback IDs for providers without issuer support,
including fallback to the global or default callback for legacy registered
clients.
- Persist registered callback URLs for MCP servers and plugins, and insert the
active listener port into portless loopback redirects.
## Testing
Add coverage for issuer validation, callback-mode discovery, registered and
legacy clients, plugin OAuth, CLI persistence, and loopback listener ports.
GitOrigin-RevId: 2878c92e237fc17fd3def0bd2e1cce3e104a3db8
## Why
Reusing an MCP connection that is still starting after its
`startup_timeout_sec` changes leaves the old startup budget in effect.
## What changed
- Track the effective startup timeout on each MCP connection.
- Reuse a pending startup only when its timeout still matches the current
configuration.
- Continue reusing ready connections when only the startup timeout changes.
## Testing
Added integration coverage that refreshes the timeout while one server is
still initializing and another is ready, verifying that only the pending
startup is replaced.
GitOrigin-RevId: 5ed71a57d3bf0dd6e227aacd16acd3a35bc37ecf
## What changed
- Include the configured authentication mode in the MCP connection identity so
runtime reconciliation replaces connections instead of reusing them after an
authentication-mode change.
- Add a regression test covering a switch from OAuth to ChatGPT authentication
for an executor-owned MCP server.
GitOrigin-RevId: 18cd9df62a9a5ee44594dcde6a844ad7d5e67ee2
## What changed
- Add Windows sandbox mode, private-desktop behavior, and legacy Landlock selection to each `EnvironmentConfig`.
- Centralize sandbox context construction on `TurnEnvironment`, preserving environment-owned permissions, paths, and backend settings while applying additional permission grants.
- Use the environment-derived context for project instructions, capability discovery, file uploads, and filesystem-oriented tools.
## Testing
- Verify capability discovery uses the selected environment's permission profile and sandbox backends when they differ from the thread defaults.
GitOrigin-RevId: 7ae2fed90c8ada950f2e8431e571e9b2c793c291
## Why
MCP inventory can be cached or collected separately from a thread's live
connections, so tool availability alone does not describe the current runtime
state.
## What changed
- Add a nullable `runtimeStatus` to `mcpServerStatus/list` for thread-scoped
requests, covering not-started, starting, connected, authentication-required,
failed, cancelled, and disabled connections.
- Observe published connection state without starting or reconnecting servers,
and return an unknown status when no thread is supplied or the active
configuration no longer matches the published registration.
- Show connection state and tool counts in the compact `/mcp` view while
retaining the detailed inventory in `/mcp verbose` and compatibility with
servers that omit `runtimeStatus`.
## Testing
- Cover runtime status transitions, deferred and disabled servers, closed
transports, configuration changes, protocol compatibility, and TUI rendering.
GitOrigin-RevId: e3bb6efe652f0fa8b3c97d5c53e4729b3a87cd91
## What changed
Propagate canonical denial, timeout, and abort responses from strict MCP
auto-review instead of replacing them with a generic decline. This preserves
the reviewer's action and metadata, including denial rationale, while still
failing closed when no canonical decision is available.
Update the fallback message to direct the agent to request explicit user
approval before proceeding.
## Testing
Add unit and app-server integration coverage for strict auto-review denials
and cancellations.
GitOrigin-RevId: d8126ab223ab546b95e2d984f6e4dd540a324a59
## What changed
- Scope executor-provided stop-hook calls to the MCP server environment that registered the hook, and reject calls when that environment does not match.
- Forward turn metadata with executor stop-hook requests while retaining the hook call's `threadId` metadata.
## Testing
- Cover environment matching for MCP tool calls and verify executor stop hooks receive their environment ID and request metadata.
GitOrigin-RevId: b544ea3a6ca1f61389fb4597978ed7aac27d529a
## Why
Older executors do not support resolving HTTP header values from their own
environment. Sending environment-backed bearer tokens to them can prevent MCP
servers from starting.
## What changed
- Advertise executor support for environment-backed HTTP headers with the
`httpHeaderEnvVars` capability.
- Delegate bearer-token resolution only when the selected executor advertises
that capability; otherwise, resolve tokens available in the host environment.
- Exclude executor-owned MCP servers that require environment-backed bearer
tokens when the executor cannot resolve them, while retaining compatible
host-owned and executor-owned servers.
## Testing
Added protocol and environment-variable coverage plus an end-to-end test that
simulates an older executor and verifies compatible MCP servers remain usable.
GitOrigin-RevId: 43545926f6f7e0f3b1091eb29d34647f6372bc4a
## What changed
- Read `mcp_servers` configuration and requirements from each selected remote
executor and add eligible HTTP servers to the thread's MCP runtime.
- Bind discovered servers to the thread's concrete executor snapshot and apply
environment MCP policy and requirements. Discovery is best effort, and
executor-local servers are not treated as required at startup.
- Ignore unsupported stdio servers and HTTP configurations that depend on
environment-provided headers or header helpers.
## Testing
- Added an app-server integration test covering discovery, authenticated HTTP
tool invocation, requirements enforcement, and exclusion of stdio servers.
GitOrigin-RevId: 6e1cdcebdbb1cc21a5a2285fbc5617d8d5997182
## Why
Remote HTTP MCP connections can source header values from the host environment,
so those variables must remain part of the connection identity even when the MCP
server runs in an executor environment.
## What changed
- Track `env_http_headers` variables for remote HTTP MCP connections.
- Continue tracking `bearer_token_env_var` only for local environments, where the
host resolves the token.
## Testing
Add coverage that verifies remote connections track host header variables without
tracking executor bearer-token variables, while local connections track both.
GitOrigin-RevId: 8fe175c54a101721a27b76495dcd298f0c2bc6a3
## Why
Executor-owned HTTP MCP servers need to read their bearer credentials from the
selected executor environment instead of the host process.
## What changed
- Preserve `bearer_token_env_var` for executor-owned HTTP MCP configurations and
resolve it when the executor sends each request.
- Extend delegated HTTP headers with executor-local environment references while
rejecting missing, empty, or protected credential variables.
- Keep transport-provided bearer authentication compatible with MCP redirect and
OAuth handling without sending a placeholder authorization value.
## Testing
- Cover authenticated executor-owned MCP requests end to end.
- Cover delegated header resolution and rejection of protected variables.
- Cover parsing executor-owned bearer configuration and transport-provided bearer
behavior.
GitOrigin-RevId: 442bf7382198ffb69eba797eb36d4c74faabda88
## What changed
- Add experimental `mcpServer/event/stream/start` and `mcpServer/event/stream/stop` requests for hosted apps, plus `mcpServer/event/stream/notification` forwarding.
- Scope subscriptions to the owning app-server connection and subscribed thread, enforce unique IDs and a per-connection limit, and clean them up when the thread is unsubscribed or the connection closes.
- Wait for the MCP active notification before completing startup, retry streams that close immediately, and terminate them when authentication or hosted runtime ownership changes.
## Testing
- Add an app-server integration test covering activation, event forwarding, duplicate subscription rejection, and explicit cancellation.
GitOrigin-RevId: 8a6fc1615adfc5af7e67def3b824fa5909ab3e7b
## Why
The Responses API accepts tool names up to 128 bytes, but MCP tool name
normalization limited model-visible names to 64 bytes.
## What changed
- Preserve MCP tool names up to the 128-byte Responses API limit.
- Continue shortening and hashing names that exceed the limit so generated
names remain bounded and unique.
## Testing
- Cover names at the 128-byte boundary and immediately above it.
- Verify distinct long names remain 128 bytes and code-mode compatible.
GitOrigin-RevId: 75544d00e75dd0e9328b3e2ac763d26f9cc99a48
## What changed
- Add environment-provided MCP restrictions for configured and plugin-provided servers.
- Disable attachment-scoped servers while their environment configuration is pending, failed, or unselected, while preserving selected-plugin access and the controller-owned Apps server.
- Apply the resolved policy to runtime startup, model tool exposure, telemetry, OAuth flows, and skill dependency installation.
## Testing
- Cover policy filtering for configured and plugin servers, environment state transitions, Apps ownership, and managed OAuth rejection.
GitOrigin-RevId: 7ca5d4dda14068e758497f88835d5cba685e159e
## What changed
- Execute hook-triggered MCP calls through the runtime's latest connection set instead of preparing a separate catalog-bound call.
- Keep hook calls from waiting for server startup or reconnecting, and reject disconnected servers immediately.
- Apply the shorter of the hook-requested timeout and the server's configured tool timeout.
## Testing
- Update connection manager tests to cover non-waiting calls and disabled tool filters.
GitOrigin-RevId: 3166b2d1e26d9ae2b8b3a648b4d0897cc260eb93
## What changed
- Execute `mcp_tool` hook handlers through the session's shared MCP runtime, including managed hook configurations.
- Restrict hook calls to already-connected, cataloged, and policy-allowed tools. Unavailable servers fail immediately without starting or reconnecting them.
- Pass session metadata to hook tools, cap hook timeouts by the server timeout, and invoke hooks without model-tool approval or recursive hook dispatch.
- Record handler type and execution mode in hook telemetry, and mark memory as externally influenced after successful or blocking MCP hooks when configured.
## Testing
- Added end-to-end coverage for prompt interpolation, hidden tools, blocking decisions, unavailable servers, thread metadata, approval bypass, and memory-mode handling.
- Added MCP runtime coverage for startup readiness, tool filters, catalog revisions, and managed connector policy.
GitOrigin-RevId: 1647cb801ebc5fa385c7bda9d9c266a389c611b8
## What changed
- Add an optional `connectorId` to `mcpServer/resource/read`.
- Forward the selected connector through `x-codex-turn-metadata` for threaded and threadless resource reads, restricting hosted app resources to that connector.
- Update the generated protocol schemas and app-server documentation.
GitOrigin-RevId: 5cc94d703abbbb6086665910c1c9ed5dc7075210
## Why
Compaction can remove the tool-call events that associate an MCP app widget with
the tool, account, and URI needed to authorize later resource reads.
## What changed
- Store a bounded MCP resource-origin checkpoint with each compacted rollout.
- Restore the checkpoint when resuming a session so existing widgets remain
readable after compaction and restart.
- Discard saved origins when rollback rewrites history across the compaction
boundary, and reject oversized or invalid checkpoints during restoration.
## Testing
- Extend the app-server MCP resource-origin test to compact a paginated thread,
continue the conversation, and read the original widgets before and after a
restart.
- Verify rollback clears provenance that no longer matches retained history.
GitOrigin-RevId: 7f91c6202fe8d9be21c78dda42fa205937c44263
## Why
App widgets need to read resources using the app and account context of the
tool call that produced them, including after a thread is restored.
## What changed
- Add an optional `originCallId` to `mcpServer/resource/read` requests and
return it on successful scoped reads.
- Track bounded provenance for successful app tool calls in thread history and
use the current tool binding, account link, and app policy when reading the
associated widget resource.
- Reject missing, mismatched, failed, or ambiguous origins, while keeping
app-only tools available for widget reads without exposing them to the model.
## Testing
Add app-server coverage for scoped widget reads across both history modes,
ephemeral and persistent threads, server restarts, app-only visibility, and
invalid origin cases.
GitOrigin-RevId: 11eaefc066b2a3b639599e4cbdef680233d150a2
## What changed
Add `server_kind=openai_codex_apps` to the
`codex.mcp.protocol_discovery` counter and its duration metric when protocol
discovery runs for the Codex Apps MCP server. Other MCP servers retain the
existing `mode` and `outcome` tags.
GitOrigin-RevId: aadbdc54642f2c103a9f1bab39308e962c115f75
## What changed
- Record a counter and duration for MCP client protocol discovery.
- Tag observations with the configured `legacy` or `auto` mode and classify
outcomes as `modern`, `legacy`, or `failure`.
GitOrigin-RevId: f348e0d900b437d5a9fef1c33cdb1314f2421785
## What changed
Keep MCP namespace descriptions when publishing tool definitions to the
process-scoped catalog cache. Cached definitions now expose the server
instructions to the model before a lazily started MCP connection finishes
initializing.
## Testing
Update the cached MCP startup integration test to verify that cached namespace
descriptions retain the originating server instructions.
GitOrigin-RevId: d1b73381852fd43c6b54a7c22a599474c774dc20
## Why
MCP runtime reconciliation can occur while an unchanged server is still
starting, such as when capability roots become available. Reconciliation
should neither wait for that startup nor initialize the same server again.
## What changed
- Reuse an active, uncancelled pending MCP connection when its identity,
catalog limit, and protocol mode still match.
- Publish the shared startup result through the reconciled server view while
applying its updated tool filter.
- Preserve cancellation when a reused pending server is subsequently removed.
## Testing
Added coverage for filtered-tool publication, disabling a reused pending
server, and capability-root reconciliation during Codex Apps startup.
GitOrigin-RevId: 690cf8695e75b341d097d7d22b5da6993b24e787
## What changed
- Add `oauth.callback_port` to MCP server configuration and preserve it when
serializing configuration edits.
- Accept `oauth.callbackPort` from plugin MCP declarations and skill dependency
metadata.
- Prefer the server-specific callback port over `mcp_oauth_callback_port` for
CLI login, app-server, plugin installation, executor, and skill dependency
OAuth flows.
## Testing
- Cover configuration parsing, serialization, and fallback behavior.
- Verify plugin, executor, and skill OAuth registrations use their configured
callback ports instead of the global port.
GitOrigin-RevId: 7f65e5e7869358307e49779f1b75e8672b607736
## Why
Local MCP requests can fail when the platform TLS backend cannot negotiate a
protocol version with an HTTPS endpoint.
## What changed
- Retry replayable local MCP requests once with rustls after a recognized TLS
protocol-version negotiation failure. Keep certificate, timeout, and unrelated
connection failures on the existing error path.
- Remember successful fallback per HTTPS origin and outbound route, while keeping
the platform TLS backend as the default for other destinations.
- Share the fallback-enabled client across local MCP resolution, CLI login, and
OAuth discovery while preserving remote environment HTTP clients.
## Testing
Added coverage for platform-specific error detection, request replay, cached
fallback reuse and isolation, non-replayable requests, redirects, and remote MCP
client selection.
GitOrigin-RevId: 39a2d96fdb2ea0e51df14f652ba2a953d24e69a1
## Why
When an MCP server rejects existing OAuth credentials, reporting that the server
is merely not logged in obscures that the user needs to authenticate again.
## What changed
Pass the MCP startup failure reason into error formatting and report that the
server requires OAuth reauthentication when appropriate. Preserve the existing
recovery hint for either `codex mcp login` or the client's OAuth sign-in flow.
## Testing
Cover the reauthentication message for both login flows and verify it in the
streamable HTTP OAuth round-trip test.
GitOrigin-RevId: 6f6d5fe7519b1a476f8b70d976223b2ea1ec938e
