nexus/.planning/phases/23-brainstormer-flow/23-03-SUMMARY.md

phase	plan	subsystem	tags	dependency_graph	tech_stack	key_files	decisions	metrics
23-brainstormer-flow	03	ui	integration chat messageType dispatch handoff brainstormer-default	requires provides affects 23-01 23-02 ChatMessage messageType dispatch ChatMessageList propagation chatApi.handoffSpec chatApi.postStatusUpdate ChatPanel brainstormer default + handoff callback ui/src/components/ChatMessage.tsx ui/src/components/ChatMessageList.tsx ui/src/components/ChatPanel.tsx ui/src/api/chat.ts	added patterns messageType dispatch block in ChatMessage before role check useBrainstormerDefault auto-selection on new conversations (activeConversationId === null proxy) handleHandoff useCallback with queryClient.invalidateQueries + pushToast on error	created modified ui/src/components/ChatMessage.tsx ui/src/components/ChatMessageList.tsx ui/src/components/ChatPanel.tsx ui/src/api/chat.ts	Used activeConversationId === null as proxy for 'new conversation' in brainstormer auto-select (messages not needed) Used useToast() / pushToast() for error toast (sonner not used in codebase; project uses custom ToastContext) Streaming synthetic message already had messageType: null in ChatMessageList — no change needed	duration_minutes completed_date tasks_completed files_modified 5 2026-04-01 2 4

Phase 23 Plan 03: Chat Integration Wiring Summary

Wire all Phase 23 components into the existing chat pipeline: messageType dispatch in ChatMessage, prop propagation in ChatMessageList, brainstormer default auto-select in ChatPanel, and handoff/status-update API methods in chatApi.

Tasks Completed

Task	Name	Commit	Files
1	ChatMessage dispatch, ChatMessageList propagation, chatApi handoff method	c7a48bc5	ChatMessage.tsx, ChatMessageList.tsx, chat.ts
2	ChatPanel brainstormer default wiring and handoff callback	3f575453	ChatPanel.tsx

Changes Made

Task 1: ChatMessage, ChatMessageList, chatApi

ChatMessage.tsx:

• Added messageType?: string | null and conversationId?: string and onHandoff? props
• Added messageType dispatch block before the role === "user" check that routes to ChatSpecCard, ChatHandoffIndicator, ChatTaskCreatedBadge, ChatStatusUpdateBadge based on messageType
• Falls through to default markdown rendering if no messageType matches

ChatMessageList.tsx:

• Added onHandoff? prop to ChatMessageListProps
• Passes messageType={msg.messageType}, conversationId={conversationId}, and onHandoff={onHandoff} to <ChatMessage>
• Synthetic streaming entry already had messageType: null — no false dispatch possible

chat.ts:

• Added handoffSpec(conversationId, spec, targetRole) — POSTs to /conversations/:id/handoff
• Added postStatusUpdate(conversationId, data) — POSTs to /conversations/:id/status-update

Task 2: ChatPanel

• Imported useBrainstormerDefault hook and useToast context
• Called useBrainstormerDefault() to get the general agent ID
• Added useEffect to auto-select brainstormer when activeAgentId === null and !activeConversationId (new conversation proxy)
• Added handleHandoff useCallback that calls chatApi.handoffSpec, invalidates messages cache, and shows error toast via pushToast on failure
• Passed onHandoff={handleHandoff} to <ChatMessageList>

Verification

• TypeScript: pnpm exec tsc --noEmit -p ui/tsconfig.json — PASSED (no errors)
• Tests: All pre-existing test failures confirmed pre-existing (skill-registry, hmr-port, plugin-worker-manager, company-import-export). No new failures introduced.

Deviations from Plan

Auto-fixed Issues

None.

Observations

1. ChatMessageList already had messageType: null — The synthetic streaming entry already contained messageType: null from Plan 02's implementation. Task 1 confirmed this and passed the messageType through to ChatMessage without any additional changes needed to the streaming entry.

2. Toast library — Plan suggested using toast.error() from sonner. The codebase uses a custom ToastContext with pushToast({ title, tone: "error" }). Used the project's actual pattern instead of sonner.

3. brainstormer auto-select proxy — Plan offered two options: messages-based or !activeConversationId. Since messages was already available from useChatMessages(activeConversationId) in ChatPanel, either approach was valid. Used !activeConversationId as the simpler, more semantically correct proxy (new conversation = no ID yet).

Known Stubs

None — all wiring is complete. The handoff route was implemented in Plan 01 (server-side). The components were implemented in Plan 02. This plan connects them.

Self-Check: PASSED