Implement ClientIO interaction support on Agent-Server

[GeorgeNgMsft]

Async ClientIO Callbacks: Non-Blocking Deferred-Promise Pattern
Three ClientIO methods — askYesNo, proposeAction, and popupQuestion — were previously implemented as blocking RPC invoke calls in the agent server. This meant the server-side command processing was tied to a specific client connection: a disconnect would permanently hang the operation, reconnecting clients couldn't recover pending questions, and popupQuestion was entirely disabled in server mode.

This PR converts all three to a non-blocking deferred-promise pattern:

The server generates a unique interactionId, logs the pending interaction to the DisplayLog, stores a deferred Promise in a new PendingInteractionManager, and sends a fire-and-forget requestInteraction notification to the client(s). Command processing suspends at await as before, but is no longer coupled to the connection.

The client responds via a new respondToInteraction dispatcher method, which resolves the deferred promise and resumes processing exactly where it left off.
On client disconnect, pending interactions owned by that connection are cancelled (rejecting their promises), and all callers treat this as a cancellation of the operation.
popupQuestion is now fully supported in server mode via broadcast to all connected clients, with first-responder resolution.

Pending interactions are logged to DisplayLog so they can be replayed to reconnecting or newly joining clients.
Existing callers (askYesNoWithContext, confirmTranslation, sessionContext.popupQuestion) required no changes — the ClientIO interface signatures are unchanged.

[Copilot]

Pull request overview

This PR introduces an async “deferred interaction” mechanism for ClientIO prompts in agent-server mode, so server-side command execution is no longer coupled to a single blocking RPC invoke call and can survive disconnect/reconnect scenarios.

Changes:

• Adds new dispatcher-types for pending interaction requests/responses and extends ClientIO/Dispatcher APIs to support requestInteraction + respondToInteraction.
• Implements server-side tracking/logging of pending interactions via PendingInteractionManager and new DisplayLog entry types.
• Wires new RPC surface area and propagates pending interactions to clients on session join.

Reviewed changes

Copilot reviewed 29 out of 30 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
ts/pnpm-lock.yaml	Adds workspace dependency links for @typeagent/dispatcher-types.
ts/packages/shell/src/renderer/src/main.ts	Adds ClientIO stubs for deferred interaction events (currently no-op).
ts/packages/dispatcher/types/src/pendingInteraction.ts	New shared types for pending interaction request/response payloads.
ts/packages/dispatcher/types/src/index.ts	Re-exports pending interaction types.
ts/packages/dispatcher/types/src/displayLogEntry.ts	Adds pending-interaction and interaction-resolved log entry types.
ts/packages/dispatcher/types/src/dispatcher.ts	Adds respondToInteraction to the Dispatcher interface.
ts/packages/dispatcher/types/src/clientIO.ts	Adds requestInteraction and interactionResolved to ClientIO.
ts/packages/dispatcher/rpc/src/dispatcherTypes.ts	Exposes respondToInteraction through dispatcher RPC invoke functions.
ts/packages/dispatcher/rpc/src/dispatcherServer.ts	Implements RPC server handler for respondToInteraction.
ts/packages/dispatcher/rpc/src/dispatcherClient.ts	Implements RPC client call for respondToInteraction.
ts/packages/dispatcher/rpc/src/clientIOTypes.ts	Adds new ClientIO call-function typings for deferred interactions.
ts/packages/dispatcher/rpc/src/clientIOServer.ts	Wires new ClientIO call handlers on the RPC server side.
ts/packages/dispatcher/rpc/src/clientIOClient.ts	Wires new ClientIO call senders on the RPC client side.
ts/packages/dispatcher/nodeProviders/test/provider.spec.ts	Updates test ClientIO stub to satisfy the extended interface.
ts/packages/dispatcher/dispatcher/src/internal.ts	Exposes PendingInteractionManager via internal exports.
ts/packages/dispatcher/dispatcher/src/helpers/console.ts	Adds no-op stubs for deferred interactions in console ClientIO.
ts/packages/dispatcher/dispatcher/src/displayLog.ts	Adds logging helpers for pending interactions and their resolution.
ts/packages/dispatcher/dispatcher/src/dispatcher.ts	Adds base respondToInteraction method (throws by default).
ts/packages/dispatcher/dispatcher/src/context/pendingInteractionManager.ts	New manager to store deferred promises and handle cancel/resolve.
ts/packages/dispatcher/dispatcher/src/context/interactiveIO.ts	Updates nullClientIO to include the new methods.
ts/packages/commandExecutor/src/commandServer.ts	Updates MCP ClientIO stub to include the new methods.
ts/packages/cli/src/enhancedConsole.ts	Adds no-op stubs for deferred interactions in CLI ClientIO.
ts/packages/agentServer/server/src/sharedDispatcher.ts	Implements deferred interaction flow in server shared dispatcher.
ts/packages/agentServer/server/src/sessionManager.ts	Returns pending interactions on session join.
ts/packages/agentServer/server/src/server.ts	Includes pending interactions in join-session response payload.
ts/packages/agentServer/server/package.json	Adds dependency on @typeagent/dispatcher-types.
ts/packages/agentServer/protocol/src/protocol.ts	Extends JoinSessionResult with optional pendingInteractions.
ts/packages/agentServer/protocol/package.json	Adds dependency on @typeagent/dispatcher-types.
ts/packages/agentServer/docs/async-clientio-design.md	Adds design documentation for the deferred interaction pattern.
ts/packages/agents/browser/src/extension/serviceWorker/dispatcherConnection.ts	Adds no-op stubs for deferred interactions in extension ClientIO.

Files not reviewed (1)

• ts/pnpm-lock.yaml: Language not supported

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 31 out of 32 changed files in this pull request and generated 10 comments.

Files not reviewed (1)

• ts/pnpm-lock.yaml: Language not supported

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.