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docs(21-03): complete chat wire-up plan — API client, ChatPanel, conversation list, message list, Layout integration

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Mikkel Georgsen 2026-04-01 13:13:25 +02:00
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8
.planning/REQUIREMENTS.md
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@ -50,8 +50,8 @@
### History & Persistence (6)
- [x] **HIST-01** — All conversations persisted in libSQL
- [ ] **HIST-02** — Conversation list in sidebar: sorted by most recent, searchable, filterable by agent
- [ ] **HIST-03** — Infinite scroll in the conversation list sidebar
- [x] **HIST-02** — Conversation list in sidebar: sorted by most recent, searchable, filterable by agent
- [x] **HIST-03** — Infinite scroll in the conversation list sidebar
- [ ] **HIST-04** — Conversation export: download as Markdown or JSON
- [x] **HIST-05** — Cross-device sync: conversations accessible from any device on the network via the Nexus server API
- [x] **HIST-06** — Chat history survives server restarts: no in-memory-only state
@ -147,8 +147,8 @@ The following are explicitly deferred:
| AGENT-06 | Phase 23 | Pending |
| AGENT-07 | Phase 23 | Pending |
| HIST-01 | Phase 21 | Complete |
| HIST-02 | Phase 21 | Pending |
| HIST-03 | Phase 21 | Pending |
| HIST-02 | Phase 21 | Complete |
| HIST-03 | Phase 21 | Complete |
| HIST-04 | Phase 24 | Pending |
| HIST-05 | Phase 21 | Complete |
| HIST-06 | Phase 21 | Complete |

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.planning/ROADMAP.md
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@ -31,11 +31,11 @@
3. Agent messages render with full markdown: code blocks with syntax highlighting and a copy button, tables, lists, headings, links, and inline images
4. Conversations and all messages are stored in libSQL and survive a server restart
5. The chat interface applies Catppuccin Mocha, Tokyo Night, and Catppuccin Latte themes correctly; code block highlighting matches the active theme
**Plans:** 2/4 plans executed
**Plans:** 3/4 plans executed
Plans:
- [x] 21-01-PLAN.md — DB schema, shared types, service layer, and REST API for conversations and messages
- [x] 21-02-PLAN.md — ChatMarkdownMessage with syntax highlighting/copy button, ChatInput with auto-resize/keyboard shortcuts, theme CSS
- [ ] 21-03-PLAN.md — Chat API client, panel context, hooks, ChatPanel/ConversationList/MessageList, Layout integration
- [x] 21-03-PLAN.md — Chat API client, panel context, hooks, ChatPanel/ConversationList/MessageList, Layout integration
- [ ] 21-04-PLAN.md — Full test suite verification and visual/functional checkpoint
**UI hint**: yes
@ -185,7 +185,7 @@ All 65 v1 requirements are mapped to exactly one phase. No orphans.
| Phase | Milestone | Plans Complete | Status | Completed |
|-------|-----------|----------------|--------|-----------|
| 21. Chat Foundation | v1.3 | 2/4 | In Progress| |
| 21. Chat Foundation | v1.3 | 3/4 | In Progress| |
| 22. Agent Streaming | v1.3 | 0/? | Not started | - |
| 23. Brainstormer Flow | v1.3 | 0/? | Not started | - |
| 24. Search, History & Branching | v1.3 | 0/? | Not started | - |

15
.planning/STATE.md
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@ -3,14 +3,14 @@ gsd_state_version: 1.0
milestone: v1.3
milestone_name: milestone
status: executing
stopped_at: Completed 21-01-PLAN.md
last_updated: "2026-04-01T11:04:10.556Z"
stopped_at: Completed 21-03-PLAN.md
last_updated: "2026-04-01T11:13:17.420Z"
last_activity: 2026-04-01
progress:
total_phases: 6
completed_phases: 0
total_plans: 4
completed_plans: 2
completed_plans: 3
percent: 0
---
@ -26,7 +26,7 @@ See: .planning/PROJECT.md (updated 2026-03-30)
## Current Position
Phase: 21 (chat-foundation) — EXECUTING
Plan: 3 of 4
Plan: 4 of 4
Status: Ready to execute
Last activity: 2026-04-01
@ -61,6 +61,7 @@ Progress: [░░░░░░░░░░] 0%
| Phase 01-foundation P01 | 2 | 2 tasks | 7 files |
| Phase 21-chat-foundation P02 | 15 | 3 tasks | 7 files |
| Phase 21-chat-foundation P01 | 4 | 2 tasks | 15 files |
| Phase 21-chat-foundation P03 | 5 | 2 tasks | 9 files |
## Accumulated Context
@ -82,6 +83,8 @@ Recent decisions affecting current work:
- [Phase 21-chat-foundation]: ChatInput/ChatMarkdownMessage tests use jsdom+createRoot+act (not @testing-library/react which is not installed)
- [Phase 21-chat-foundation]: isNull(chatConversations.title) with AND condition for idempotent title-setting on first message
- [Phase 21-chat-foundation]: listConversations fetches limit+1 to determine hasMore without extra COUNT query
- [Phase 21-chat-foundation]: mutateAsync(undefined) required for optional-arg mutations in TanStack Query — TS2554 fix
- [Phase 21-chat-foundation]: ChatInput focus management uses DOM querySelector('[aria-label=Message input]') to avoid ref threading across component tree
### Pending Todos
@ -94,6 +97,6 @@ None yet.
## Session Continuity
Last session: 2026-04-01T11:04:10.553Z
Stopped at: Completed 21-01-PLAN.md
Last session: 2026-04-01T11:13:12.828Z
Stopped at: Completed 21-03-PLAN.md
Resume file: None

138
.planning/phases/21-chat-foundation/21-03-SUMMARY.md Normal file
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@ -0,0 +1,138 @@
---
phase: 21-chat-foundation
plan: 03
subsystem: ui
tags: [react, tanstack-query, infinite-scroll, chat, intersection-observer, context]
# Dependency graph
requires:
- phase: 21-chat-foundation/21-01
provides: Chat API backend (conversations, messages endpoints), shared ChatConversation/ChatMessage types
- phase: 21-chat-foundation/21-02
provides: ChatMarkdownMessage and ChatInput presentational components
provides:
- chatApi fetch wrappers for all chat endpoints
- ChatPanelProvider with localStorage-persisted open state and active conversation tracking
- useChatConversations (useInfiniteQuery with cursor pagination)
- useChatMessages (useInfiniteQuery with cursor pagination)
- useSendMessage and useCreateConversation mutations
- ChatConversationList with infinite scroll, inline rename/delete confirmation, pin/archive actions
- ChatMessageList with role=log, auto-scroll, ChatMarkdownMessage for assistant messages
- ChatPanel right-side drawer composing conversation list + message area (width transition)
- Layout integration: MessageSquare toggle, ChatPanel in flex row, effect closing PropertiesPanel when chat opens
affects: [21-chat-foundation/21-04]
# Tech tracking
tech-stack:
added: []
patterns:
- useInfiniteQuery with cursor-based pagination (updatedAt/createdAt as cursor)
- ChatPanelProvider pattern mirrors PanelContext with localStorage persistence
- IntersectionObserver sentinel div for infinite scroll trigger
- Inline delete confirmation (no modal) via conditional render in list item hover state
- DOM querySelector for focus management across component boundaries
key-files:
created:
- ui/src/api/chat.ts
- ui/src/context/ChatPanelContext.tsx
- ui/src/hooks/useChatConversations.ts
- ui/src/hooks/useChatMessages.ts
- ui/src/components/ChatPanel.tsx
- ui/src/components/ChatConversationList.tsx
- ui/src/components/ChatMessageList.tsx
modified:
- ui/src/main.tsx
- ui/src/components/Layout.tsx
key-decisions:
- "mutateAsync(undefined) required for optional-arg mutations in TanStack Query TypeScript — fixed TS2554 error"
- "Focus management uses DOM querySelector('[aria-label=Message input]') across component boundaries to avoid ref threading"
patterns-established:
- "IntersectionObserver sentinel at bottom of scroll list triggers fetchNextPage for infinite scroll"
- "Inline delete confirmation replaces dropdown with confirmation widget on hover — no modal needed"
requirements-completed: [CHAT-04, CHAT-05, CHAT-06, HIST-02, HIST-03]
# Metrics
duration: 5min
completed: 2026-04-01
---
# Phase 21 Plan 03: Chat Foundation Wire-Up Summary
**Chat UI wired end-to-end: API client, TanStack Query hooks with cursor pagination, ChatPanel drawer with conversation list (infinite scroll + CRUD) and message rendering integrated into Layout**
## Performance
- **Duration:** 5 min
- **Started:** 2026-04-01T11:07:28Z
- **Completed:** 2026-04-01T11:12:11Z
- **Tasks:** 2
- **Files modified:** 9
## Accomplishments
- Created `chatApi` covering all 11 chat endpoints (conversations + messages CRUD, pin/archive)
- Built `ChatPanelContext` with localStorage persistence (`nexus:chat-panel-open`) and active conversation tracking
- Implemented `useChatConversations` and `useChatMessages` with `useInfiniteQuery` cursor pagination plus full mutation hooks
- Built `ChatConversationList` with IntersectionObserver infinite scroll, inline rename, delete confirmation widget, and pin/archive dropdown
- Built `ChatMessageList` with `role="log"` aria semantics, auto-scroll, user/assistant message styling, ChatMarkdownMessage for assistant
- Created `ChatPanel` drawer (width transition 0↔380px) composing both lists with `ChatInput`
- Integrated into `Layout.tsx`: MessageSquare toggle button, ChatPanel in flex row, PropertiesPanel closes when chat opens
## Task Commits
1. **Task 1: Chat API client, context provider, and TanStack Query hooks** - `2a072483` (feat)
2. **Task 2: ChatPanel, ChatConversationList, ChatMessageList, and Layout integration** - `7868b073` (feat)
**Plan metadata:** _(pending docs commit)_
## Files Created/Modified
- `ui/src/api/chat.ts` - chatApi with listConversations, createConversation, getConversation, updateConversation, deleteConversation, archiveConversation, unarchiveConversation, pinConversation, unpinConversation, listMessages, sendMessage
- `ui/src/context/ChatPanelContext.tsx` - ChatPanelProvider with localStorage persistence and active conversation state
- `ui/src/hooks/useChatConversations.ts` - useChatConversations (useInfiniteQuery), useCreateConversation, useConversationActions (pin/unpin/archive/unarchive/remove/rename)
- `ui/src/hooks/useChatMessages.ts` - useChatMessages (useInfiniteQuery), useSendMessage
- `ui/src/components/ChatConversationList.tsx` - Sidebar with IntersectionObserver infinite scroll, inline rename, delete confirmation, pin/archive dropdown
- `ui/src/components/ChatMessageList.tsx` - role=log message thread with auto-scroll and ChatMarkdownMessage
- `ui/src/components/ChatPanel.tsx` - Right-side drawer shell composing conversation list and message area
- `ui/src/main.tsx` - Added ChatPanelProvider to app tree
- `ui/src/components/Layout.tsx` - MessageSquare toggle, ChatPanel, effect closing PropertiesPanel when chat opens
## Decisions Made
- `mutateAsync(undefined)` required for TanStack Query optional-arg mutations — TypeScript infers at least one argument needed and calling with zero causes TS2554 error
- Focus management uses `document.querySelector('[aria-label="Message input"]')` to reach ChatInput textarea across component tree without ref threading
## Deviations from Plan
### Auto-fixed Issues
**1. [Rule 1 - Bug] Fixed TypeScript TS2554 for zero-arg mutateAsync calls**
- **Found during:** Task 2 (ChatPanel), build verification
- **Issue:** `createConversation.mutateAsync()` called with 0 args — TanStack Query typing requires at least 1 argument even when mutationFn has optional params
- **Fix:** Changed both call sites to `createConversation.mutateAsync(undefined)`
- **Files modified:** ui/src/components/ChatPanel.tsx
- **Verification:** `pnpm --filter @paperclipai/ui build` succeeds with no TypeScript errors
- **Committed in:** `7868b073` (Task 2 commit)
---
**Total deviations:** 1 auto-fixed (1 bug)
**Impact on plan:** Minimal — single TypeScript fix required for correct compilation. No scope creep.
## Issues Encountered
None beyond the TypeScript fix documented above.
## User Setup Required
None - no external service configuration required.
## Next Phase Readiness
- Chat UI is fully wired and functional end-to-end
- Users can create conversations, send messages, browse history with infinite scroll
- Opening chat closes PropertiesPanel — no competing panels
- Panel state persists in localStorage across page loads
- Plan 04 (if any) can build on the established chat foundation
---
*Phase: 21-chat-foundation*
*Completed: 2026-04-01*