* Adopt AHP 0.6.0 workingDirectories property in agent host Sync the generated agent host protocol copy to spec version 0.6.0 (agent-host-protocol @ 11f1a65e), which renames the singular `workingDirectory` on session/chat state to a `workingDirectories` array in preparation for multiroot session support. This change is a pure, behaviour-preserving property adoption across all consumers: sessions continue to use a single working directory. Reads of a single directory now use `workingDirectories?.[0]`, field-copy sites pass the array through unchanged, and writes from a single URI produce a one-element array. No multiroot client support is added here (no capability advertising, state actions, multi-folder workspaces, or UI); those land in a follow-up milestone. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Address PR review feedback - Reject the not-yet-supported multiroot working-directory client actions (session|chat/workingDirectorySet|Removed) in the handwritten dispatch path so a client cannot mutate the synchronized working-directory set without the agent actually reconfiguring its directory access. The protocol declarations remain; only the operational dispatch is deferred until multiroot lands. - Compare workingDirectories by array identity (not just the primary entry) in the state manager summary-equality check, matching the immutable reducers and SessionSummaryNotifier so secondary-directory changes still dirty the summary. - Update ISessionWithDefaultChat / mergeSessionWithDefaultChat API docs to describe a chat's workingDirectories subset overriding or inheriting the session's full set, fixing links to the removed singular members. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Fix agentHost session-filter test for workingDirectories migration The `sessionAdded notification filters out sessions outside the workspace` test constructed session summaries with the removed singular `workingDirectory` field, so the production filter (which now reads `workingDirectories[0]`) saw no directory and dropped the in-workspace session. Update the two directly-built summaries to the `workingDirectories` array form. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Migrate test createSession wire calls to workingDirectories The createSession dispatch handler now reads the working directory from the renamed `CreateSessionParams.workingDirectories` array (AHP 0.6.0), but several node integration / e2e test call sites still sent the removed singular `workingDirectory` field. Since the field is silently ignored, sessions were created without a working directory and fell back to the default chats folder, failing the Agent Host E2E workspace/fileOperations/hostFeatures suites across all providers (wrong cwd cascades into file completions, renames, worktree resolution, and cd-prefix stripping). Send `workingDirectories: [dir]` from the shared `createProviderSession` helper and the remaining direct wire call sites so the requested directory reaches the session state again. The real VS Code client already sent the array form. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Adopt AHP 0.7.0 primaryWorkingDirectory + requiresPrimary Re-sync the generated protocol copy to the multiroot spec at 148c716b (spec version 0.7.0) and adopt the two follow-up changes: - Capability flag renamed `MultipleWorkingDirectoriesCapability.immutablePrimary` -> `requiresPrimary`, with the new "agent needs one directory designated as its primary root" semantics. No consumers referenced the old name. - New optional `primaryWorkingDirectory` field at both the session level (CreateSessionParams / SessionMetadata -> SessionState + SessionSummary) and the chat level (CreateChatParams / ChatState + ChatSummary). Mirror it through the state<->summary projection layer exactly like `workingDirectories`: createSessionState / createChatState / chatSummaryFromState / mergeSessionWithDefaultChat, plus the state manager's summary projection, field-equality check, SessionSummaryNotifier diff, and markSessionPersisted propagation. The generated SessionChatUpdated partial-summary merge is field-agnostic, so it carries the new field automatically. Purely additive optional fields; no client multiroot behavior is added (consumers still read `workingDirectories[0]` as the single effective root). Also preserve the VS Code-local `CompletionItem.label` field (added in #326807, ahead of the spec) which the verbatim re-sync would otherwise drop. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Reject unsupported working-directory actions via reconciliation path Address PR review feedback on the multiroot working-directory action gate: - Instead of silently dropping the four not-yet-supported session|chat/workingDirectorySet|Removed client actions (which never echoed the origin, leaving the client's optimistic write-ahead action pending until reconnect), emit a rejection envelope through the normal reconciliation path. Added AgentHostStateManager.rejectClientAction, which emits an ActionEnvelope carrying the original ActionOrigin and a rejectionReason without running the reducer (no synchronized state change), so the originating client rolls back its optimistic action. - Guard the write-ahead client reconcile (SessionStateSubscription / ChatStateSubscription) so a rejected envelope is never applied to confirmed state in any branch — this also prevents a broadcast rejection from leaking the rejected action into a non-origin client's state. - Add a table-driven test covering all four action types asserting no dispatch and exactly one rejection envelope preserving the original origin. - Simplify the create-session working-directory read to `URI.parse(params.workingDirectories[0])` now the branch proves index 0 exists. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Refine primaryWorkingDirectory to per-chat read-only (AHP ea279d99) Re-sync the protocol copy to spec ea279d99 (0.7.0) and adopt the refined primaryWorkingDirectory design: - Session has NO primary: `primaryWorkingDirectory` is removed from SessionState / SessionSummary. The session is just the equal-peer `workingDirectories` set. Dropped all session-level primary handling (createSessionState, the SessionSummaryNotifier diff, _toSummary, _summaryFieldsEqual, and markSessionPersisted propagation). - Primary is per-chat, read-only, fixed at chat creation: kept the ChatState <-> ChatSummary mirroring (createChatState / chatSummaryFromState) and carry the chat's own primary through the session+default-chat composite (ISessionWithDefaultChat gains its own primaryWorkingDirectory; the merge no longer falls back to a session primary). It is not sent via `session/chatUpdated` (the state manager only ever puts status/activity/title in those changes), so it never mutates post-creation. - Inputs `CreateSessionParams.primaryWorkingDirectory` (seeds the default chat's primary) and `CreateChatParams.primaryWorkingDirectory` are synced; capability `requiresPrimary` unchanged. Also re-preserve the VS Code-local `CompletionItem.label` field (#326807, ahead of the spec) that the verbatim re-sync drops. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> --------- Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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