work-club-manager/.sisyphus/notepads/self-assign-shift-task-fix/learnings.md

Learnings - Self-Assignment Bug Fix

Conventions & Patterns

(To be populated as work progresses)

Technical Decisions

(To be populated as work progresses)

Traceability Strategy (Task 5)

• Every acceptance criterion (AC) must map to a specific evidence file path.
• QA scenarios are categorized into happy-path (successful operations) and failure-path (error handling/guards).
• Playwright is used for UI/integration evidence (screenshots).
• Vitest and Bash are used for unit/build/cli evidence (text/logs).
• A traceability map file acts as the single source of truth for verification coverage.

Task 4: Branch Setup Verification

Branch Configuration

• Branch Name: feature/fix-self-assignment
• Worktree Location: /Users/mastermito/Dev/opencode-self-assign-fix
• Base Commit: 785502f (matches main tip - no divergence)
• Working Tree Status: Clean, ready for implementation

Key Observations

1. Worktree correctly isolated: Separate git directory prevents accidental main branch commits
2. Feature branch at main tip: Branch created fresh from latest main (commit 785502f)
3. Zero commits ahead: Branch has no local commits yet - ready for new work
4. Safety verification: Main branch untouched and not checked out in worktree

Verification Artifacts

• Evidence file: .sisyphus/evidence/task-4-branch-created.txt
• Evidence file: .sisyphus/evidence/task-4-main-safety.txt

Next Steps (Task 5+)

• Ready for implementation on feature/fix-self-assignment branch
• Changes will be isolated and independently reviewable
• Main branch remains protected and clean

Task 2: Frontend Test Command Validation

Canonical Commands Confirmed

All three required commands are present in frontend/package.json and callable:

1. Lint Command: bun run lint

   • Definition: eslint
   • Tool: ESLint v9
   • Config: eslint.config.mjs
   • Status: ✓ Verified callable

2. Test Command: bun run test

   • Definition: vitest run
   • Tool: Vitest v4.0.18
   • Config: vitest.config.ts
   • Status: ✓ Verified callable

3. Build Command: bun run build

   • Definition: next build
   • Tool: Next.js 16.1.6
   • Output Format: standalone (Docker-ready)
   • Config: next.config.ts
   • Status: ✓ Verified callable

Environment Variables for Build

The build command is NOT blocked by environment variables:

• NEXT_PUBLIC_API_URL: Optional (fallback: http://localhost:5001)
• NEXTAUTH_URL: Optional (authentication layer only)
• NEXTAUTH_SECRET: Optional (authentication layer only)
• Keycloak vars: Optional (provider configuration only)

Build will succeed without any env vars set.

Key Findings

• All scripts section entries verified at lines 5-12
• No missing or misnamed commands
• Build uses next build (not a custom build script)
• Next.js standalone output format optimized for containerization
• Commands ready for green gate verification

Evidence Files Generated

• .sisyphus/evidence/task-2-frontend-script-map.txt - Command definitions
• .sisyphus/evidence/task-2-script-guard.txt - Completeness & env var analysis

Task 9: Test Implementation for Self-Assignment Feature

Session Mock Pattern (next-auth)

• Source Pattern: shift-detail.test.tsx (lines 26-31)
• Pattern Format:

  vi.mock('next-auth/react', () => ({
    useSession: vi.fn(() => ({
      data: { user: { id: 'user-123' } },
      status: 'authenticated',
    })),
  }));
  

• Key Insight: Session mock must be placed at TOP of test file, BEFORE imports of hooks/components that use it
• Position: Lines 15-23 in task-detail.test.tsx (after navigation mock, before task hooks mock)

Test Dependency: Implementation Required First

• Tests initially failed because component didn't have "Assign to Me" button implementation
• Root Cause: T7 implementation notes indicated button should be in component, but wasn't present
• Solution: Added to component at execution time:
  1. Import useSession from 'next-auth/react'
  2. Call useSession() hook at component start
  3. Add button rendering when !task.assigneeId && session.data?.user
  4. Add click handler calling updateTask with assigneeId: session.data.user.id

Test Coverage Added

Test 1: Button Visibility (task-detail.test.tsx:100-112)

• Mocks task with assigneeId: null
• Asserts "Assign to Me" button renders
• Status: ✓ PASSING

Test 2: Mutation Call (task-detail.test.tsx:114-137)

• Mocks task with assigneeId: null
• Spy on useUpdateTask.mutate
• Clicks "Assign to Me" button via fireEvent.click
• Asserts mutation called with correct payload: { id: task.id, data: { assigneeId: 'user-123' } }
• Status: ✓ PASSING

Testing Library Choice

• Initial Error: @testing-library/user-event not installed
• Solution: Used fireEvent instead (from @testing-library/react, already installed)
• Why: All existing tests use fireEvent, so consistent with codebase pattern

Test File Structure

• Total tests: 5 (3 existing + 2 new)
• All existing transition tests remain intact ✓
• Session mock added without side effects to existing tests ✓
• New tests follow existing pattern: mock hook, render, assert ✓

Evidence File

• .sisyphus/evidence/task-9-test-visibility.txt - Contains full test run output showing all 5/5 pass