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feat(FN-4004): add bounded room thread and mailbox reply context to agents

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Adds bounded room thread context and mailbox reply context to the chat system, implemented in `agent-tools.ts` with corresponding dashboard room handling in `chat.ts`; includes expanded test coverage for both modules and updated documentation in `agents.md`.

Fusion-Task-Id: FN-4004
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Fusion
2026-05-11 07:34:34 -07:00
committed by gsxdsm
parent 94fb1cc2ef
commit 95c7588e30
7 changed files with 260 additions and 9 deletions
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docs/dashboard-guide.md
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@@ -114,6 +114,7 @@ Chat Rooms are project-scoped group conversations for multiple agents. They are
- After a successful room send, the room composer is cleared (matching direct-chat composer behavior) so stale text is not left in the input.
- On mobile, room threads use the same keyboard-aware thread anchoring as direct chat, keeping the composer pinned above the soft keyboard while typing.
- The dashboard backend now orchestrates room responders on that POST: mentioned members are routed as direct responders, additional ambient members may reply (up to the room ambient responder cap), and each assistant reply is persisted with `senderAgentId` via `chatStore.addRoomMessage(...)`.
- Room responder prompt construction now includes a bounded recent room transcript (role, sender label, timestamp, content) plus an explicit latest-user-message marker, so replies stay thread-aware without unbounded prompt growth.
- The UI still avoids optimistic room echo; after `POST /api/chat/rooms/:id/messages`, it immediately re-fetches authoritative room messages to surface persisted user/assistant replies even if SSE delivery is delayed, and it continues to apply `chat:room:message:*` SSE updates for live fan-out.
- Relationship summary: direct Chat runs one target (agent or model) per session; rooms are shared threads with multiple agent members and now use the same message contract as direct Chat; Quick Chat stays a floating single-target panel and does not host rooms.
- For backend details, see the [Chat Room REST API reference](./architecture.md#real-time-channels) and the [chat room storage schema (`chat_rooms`, `chat_room_members`, `chat_room_messages`)](./storage.md#chat-rooms-migration-70).