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Included review availability: Your plan provides up to 10 included reviews per hour; 8 remain after this review. 📝 WalkthroughWalkthroughThe change adds desktop control capabilities, open-thread activation, request liveness tracking, and stale-response protection. It also adds versioned provider integration context to Claude and Codex subprocess environments. ChangesDesktop control protocol
Provider integration context
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~60 minutes Change: Feature Merge Risk: ⚪ Minimal · up to No unresolved merge-blocking behavior is identified. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
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In `@apps/desktop/src/app/DesktopAppActivationBroker.ts`:
- Line 123: Bind renderer liveness and completion to a broker-generated dispatch
token rather than requestId alone. Update DesktopAppActivationBroker’s dispatch,
renderer request/response handling, isRequestActive(), and complete() paths to
carry and validate the same token, preventing stale work from affecting a reused
ID. Add a regression test covering cancellation or supersession, ID reuse for
another thread, and completion of the stale renderer task.
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📒 Files selected for processing (27)
apps/desktop/src/app/DesktopAppActivation.test.tsapps/desktop/src/app/DesktopAppActivation.tsapps/desktop/src/app/DesktopAppActivationBroker.test.tsapps/desktop/src/app/DesktopAppActivationBroker.tsapps/desktop/src/ipc/DesktopIpcHandlers.tsapps/desktop/src/ipc/channels.tsapps/desktop/src/ipc/methods/appActivation.tsapps/desktop/src/preload.tsapps/server/src/cli/app.test.tsapps/server/src/environment/ServerEnvironment.test.tsapps/server/src/environment/ServerEnvironment.tsapps/server/src/provider/Layers/ClaudeAdapter.test.tsapps/server/src/provider/Layers/ClaudeAdapter.tsapps/server/src/provider/Layers/CodexAdapter.test.tsapps/server/src/provider/Layers/CodexAdapter.tsapps/server/src/provider/providerIntegrationContext.test.tsapps/server/src/provider/providerIntegrationContext.tsapps/server/src/textGeneration/ClaudeTextGeneration.test.tsapps/server/src/textGeneration/ClaudeTextGeneration.tsapps/server/src/textGeneration/CodexTextGeneration.test.tsapps/server/src/textGeneration/CodexTextGeneration.tsapps/web/src/components/desktop/DesktopAppActivationCoordinator.tsxapps/web/src/desktopAppActivation.test.tsapps/web/src/desktopAppActivation.tspackages/contracts/src/desktopAppActivation.tspackages/contracts/src/environment.tspackages/contracts/src/ipc.ts
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What Changed
Let external desktop apps identify T3-managed conversations and open the exact thread represented by a session card or shortcut. The implementation extends the existing environment descriptor, provider launch environments and desktop control channel.
T3CODE_INTEGRATION_CONTEXTinto Codex and Claude conversation subprocesses. It contains the environment ID, T3 thread ID and provider instance ID. Auxiliary text generation gets a separateauxiliarymarker so hooks can distinguish background work from conversations.providerIntegrationContext: 1and, when a native desktop shell is available, the existing local control address in the environment descriptor.get-capabilitiesandopen-threadto the existing local request/response protocol. Capability discovery does not raise a window. Opening a thread raises the window only after the renderer confirms the requested environment and thread. Each renderer dispatch has a fresh broker-generated ID, so reusing a client's request ID cannot revive old renderer work. Replies retain the original client ID.The patch has no third-party app dependency, new HTTP endpoint, settings screen or authentication flow. Existing
open-workspaceclients keep their protocol-v1 behavior.Why
An external app observing provider hooks cannot reliably tell whether a Codex or Claude process represents a T3 conversation or auxiliary work. Combining those events with T3's thread list can produce duplicate or stale session cards. Bringing T3 to the foreground alone leaves the user on the previously selected conversation.
The integration gives external apps a stable identity,
(environmentId, threadId), and an acknowledged navigation target. VibeDeck, a Stream Deck plugin, is the motivating implementation. Launchers, menu-bar session monitors and notification tools can use the same interfaces without T3 containing app-specific integration code.How an external app can use it
/.well-known/t3/environment, verify/pin the environment identity and exchange the pairing credential through the existing/oauth/tokenendpoint withorchestration:readscope./api/orchestration/shellwith the resulting access token and key session entries by the environment/thread pair. Reconcile status, completion and archived/removed threads from T3's snapshot.T3CODE_INTEGRATION_CONTEXT. Associateconversationevents with the matching T3 thread instead of creating a second provider session. Ignoreauxiliaryevents as conversation cards. The marker is descriptive metadata, not an authorization credential.capabilities.desktopAppControl.address, validate the local endpoint and send a newline-terminated JSON capability probe. Ifopen-threadis supported, send the chosen environment/thread pair and check the matching acknowledgement.Example conversation marker:
{"version":1,"kind":"conversation","environmentId":"environment-id","threadId":"thread-id","providerInstanceId":"codex"}Example requests over the existing local control connection:
{"version":1,"requestId":"probe-1","type":"get-capabilities"} {"version":1,"requestId":"open-1","type":"open-thread","platform":"darwin","environmentId":"environment-id","threadId":"thread-id"}Send each request on its own connection and terminate it with a newline.
platformis the caller's native platform. A successful activation response includes the samerequestId,environmentIdandthreadIdwithok: true.Activation targets an existing, non-archived thread in the running desktop window's primary local environment. It does not start T3, create a thread, unarchive a conversation or send agent input. Unknown targets, environment mismatches, unavailable renderers and superseded requests return failures. The latest pending thread activation wins; late acknowledgements cannot raise an old target. Status reading remains independent of desktop activation availability.
Related: #8246 proposes OS URL deep links. This patch uses the existing local control transport so an external caller can discover supported operations and receive a correlated success or failure response.
Verification
packages/contracts,apps/desktop,apps/serverandapps/web.git diff --checkpassed.UI Changes
The existing conversation view is selected by the activation request; no new visual controls are introduced. A short interaction recording is not attached yet.
Checklist
Implementation: DeepSeek Flash through Pi CLI. Architecture, integration and review: GPT-6 Astra through Codex, with an independent Astra review. Initial integration review: Claude Fable 5.1 through Claude Code CLI. Dispatch-generation correction and focused tests: GPT-5.6 Luna through Codex, independently reviewed by GPT-6 Astra through Codex.
Summary by CodeRabbit
New Features
Bug Fixes