Why: T4 workspaces are declared by plugins via provides.workspaces (Core PluginWorkspace is the authoritative type); the host must surface the merged overlay for the frontend to render in OverlayHost.
Evidence: go test green - plugins suite new TestWorkspacesOverlay (manifest + workspaces/main.json loads, ListWorkspaces returns the declaration with shortcut and body); full internal sweep unchanged.
Impact: plugins host loads workspaces/*.json assets and exposes ListWorkspaces; server adds GET /api/workspaces passthrough; no behavior change without the manifest key.
Refs: docs/proposals/2026-09-30-ui-inbox-command-workspace.md T4; task card feature/workspaces-r1
Why: T3 of the interaction foundation - unify button/card/slash/chat entries onto one command bus (D27) composing the Agent-Command library (D30), with danger=high commands gated behind inline confirm cards and every dispatch leaving the same audit envelope.
Evidence: go test green - cmdbus suite (four-entrance audit symmetry, high-danger confirm lifecycle incl. cancel/expiry/handler-reject, audit-unavailable yields unknown, plugin spec fail-closed, schema scalar validation) and server e2e (danger command via POST /api/commands -> confirm card -> card action confirm -> committed receipt -> audit query ordered accepted->committed); legacy /help,/new,/mock,/model,/profile contract preserved through the bus; store migration v7 command_audit (both dialects) with roundtrip test updated.
Impact: new internal/cmdbus (L1 package per D33), server routes POST /api/commands/{id} + GET /api/commands/audit + registry-driven GET /api/commands, postMessage chat-entrance dispatch when the intent gate matches a registered command, plugins host OnCommands overlay, module cards policy/modules/{cmdbus,cardsvc}.md; pending confirm state is process-local (documented limitation).
Refs: docs/proposals/2026-09-30-ui-inbox-command-workspace.md T3; task card feature/command-bus-r1
Why: The frontend appends the confirmation receipt locally so it appears
immediately; returning the server-persisted message (with its id) keeps the
authoritative reconcile duplicate-free.
Evidence: go build green; covered by combo test in Dev.
Impact: response shape gains receipt field (additive).
Refs: proposal 2026-09-30-ui-inbox-command-workspace
Why: T2 of the interaction foundation — activity cards as first-class state
objects behind the right-rail inbox (proposal D25): upload ingest cards
(SR-A5 failures explicit, artifact retrievable), HITL projection cards
(double-presence, ref-linked two-way sync), squad orchestration cards and
the mock #upload demo of the full card lifecycle.
Evidence: go test ./... green across 14 packages incl. new cardsvc suite
(lifecycle, action labels and idempotency, pin/dismiss, owner isolation,
resolve-by-ref idempotency) and updated migration test (v6 activity_cards,
both dialects); events flow through the session event buffer (persist, seq,
replay); receipts appended to the conversation timeline on card actions.
Impact: additive; cards disabled (SetCards nil) degenerates to the T0
baseline; upload cards persist at project level per the v1 inbox boundary
(conversation-scoped inbox; project-level aggregation is follow-up).
Refs: modules/documents docs/proposals/2026-09-30-ui-inbox-command-workspace.md
Details (original message):
Add the vector RAG pipeline: paragraph chunker, OpenAI-compatible embeddings and rerank clients, dual-tier vector store with cosine search, and RRF hybrid retrieval
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