---
phase: 21-chat-foundation
plan: "00"
subsystem: testing
tags: [vitest, typescript, tdd, test-stubs, chat, server, ui]

# Dependency graph
requires: []
provides:
  - "chat-service.test.ts with 22 it.todo stubs (chatService CRUD, addMessage, listMessages)"
  - "chat-routes.test.ts with 11 it.todo stubs (all conversation and message endpoints)"
  - "ChatMarkdownMessage.test.tsx with 7 it.todo stubs (CHAT-02 markdown, CHAT-03 code blocks)"
  - "ChatInput.test.tsx with 6 it.todo stubs (INPUT-07 keyboard shortcuts, auto-resize, submit state)"
affects: [21-01, 21-02, 21-03, 21-04, 21-05]

# Tech tracking
tech-stack:
  added: []
  patterns:
    - "it.todo() for Wave 0 test scaffolding — vitest marks todos as skipped (exit 0)"
    - "// @vitest-environment node pragma for UI tests that do not need jsdom"

key-files:
  created:
    - server/src/__tests__/chat-service.test.ts
    - server/src/__tests__/chat-routes.test.ts
    - ui/src/components/ChatMarkdownMessage.test.tsx
    - ui/src/components/ChatInput.test.tsx
  modified: []

key-decisions:
  - "Used it.todo() (not it.skip()) so vitest marks stubs as todo rather than skipped — no false positives"
  - "Minimal imports (only describe/it from vitest) — no service mocks needed until Plans 01-05 wire them up"

patterns-established:
  - "Wave 0 stub pattern: describe/it.todo blocks only, no assertions, vitest exits 0"
  - "Server test stubs: no createApp/supertest until Plan 01 fills them in"
  - "UI test stubs: @vitest-environment node pragma following MarkdownBody.test.tsx reference"

requirements-completed: [HIST-01, CHAT-02, CHAT-03, CHAT-04, CHAT-05, CHAT-06, INPUT-07]

# Metrics
duration: 2min
completed: 2026-04-01
---

# Phase 21 Plan 00: Chat Foundation — Test Stubs Summary

**Four vitest test stub files (46 it.todo cases) establishing Wave 0 scaffolds for chat service, routes, markdown rendering, and keyboard input**

## Performance

- **Duration:** ~2 min
- **Started:** 2026-04-01T16:35:54Z
- **Completed:** 2026-04-01T16:37:57Z
- **Tasks:** 2
- **Files modified:** 4

## Accomplishments

- Created server stub `chat-service.test.ts` with 22 it.todo cases covering all chatService methods (createConversation, listConversations, getConversation, updateConversation, softDeleteConversation, addMessage, listMessages)
- Created server stub `chat-routes.test.ts` with 11 it.todo cases covering all chatRoutes endpoints (POST/GET conversations, PATCH/DELETE conversation, POST/GET messages)
- Created UI stub `ChatMarkdownMessage.test.tsx` with 7 it.todo cases covering CHAT-02 markdown rendering and CHAT-03 code block features
- Created UI stub `ChatInput.test.tsx` with 6 it.todo cases covering INPUT-07 keyboard shortcuts, auto-resize, and submit state
- All 4 files run via vitest with exit 0 (46 todos, 0 failures)

## Task Commits

Each task was committed atomically:

1. **Task 1: Create server-side test stubs (chat-service + chat-routes)** - `9a8c714e` (test)
2. **Task 2: Create UI test stubs (ChatMarkdownMessage + ChatInput)** - `ebb74914` (test)

**Plan metadata:** (docs commit — see below)

## Files Created/Modified

- `server/src/__tests__/chat-service.test.ts` - 22 it.todo stubs for chatService (HIST-01, CHAT-04, CHAT-05, CHAT-06)
- `server/src/__tests__/chat-routes.test.ts` - 11 it.todo stubs for chatRoutes endpoints
- `ui/src/components/ChatMarkdownMessage.test.tsx` - 7 it.todo stubs for markdown rendering (CHAT-02, CHAT-03)
- `ui/src/components/ChatInput.test.tsx` - 6 it.todo stubs for keyboard shortcuts (INPUT-07)

## Decisions Made

- Used `it.todo()` rather than `it.skip()` — vitest semantically distinguishes todos from skipped tests; this accurately represents "not yet implemented" vs "intentionally disabled"
- Minimal imports (only `describe`/`it` from vitest) until Plans 01-05 wire in actual implementations and mocks
- No `expect` import since todo tests never execute assertions

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered

None — vitest binary required path resolution (`/opt/nexus/node_modules/.bin/vitest`) since worktree doesn't have its own `node_modules`. Tests ran cleanly on first attempt.

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

- Plans 01-05 can now reference these stub files in their verify commands
- Each stub file has describe blocks matching the requirement IDs they cover
- Implementation plans should fill in the it.todo blocks with real assertions as they build each feature

---
*Phase: 21-chat-foundation*
*Completed: 2026-04-01*
