---
phase: 18-initiative-detail
plan: 02
subsystem: ui
tags: [react, tailwind, lucide-react, tree-view]

# Dependency graph
requires:
  - phase: 17-initiative-dashboard
    provides: StatusBadge component
  - plan: 18-01
    provides: component patterns, SerializedInitiative type
provides:
  - DependencyIndicator component for blocked-by annotations
  - TaskRow component with tree connectors and status
  - PhaseAccordion expandable phase container with task list
affects: [18-04 page assembly, initiative detail page]

# Tech tracking
tech-stack:
  added: []
  patterns: [tree-view with Unicode connectors, accordion with useState]

key-files:
  created:
    - packages/web/src/components/DependencyIndicator.tsx
    - packages/web/src/components/TaskRow.tsx
    - packages/web/src/components/PhaseAccordion.tsx
  modified: []

key-decisions:
  - "18-02: SerializedTask type defined in TaskRow (same Date-to-string serialization pattern as SerializedInitiative)"
  - "18-02: Phase hierarchy flattened — Plan layer hidden per decision 15-02, tasks rendered directly under phase"
  - "18-02: Underscore prefix for unused type prop in DependencyIndicator (_type) to satisfy noUnusedParameters"

patterns-established:
  - "Tree connector pattern: Unicode ├── / └── with border-l for visual continuity"
  - "Accordion pattern: useState toggle with ChevronDown/ChevronRight icons"

# Metrics
duration: 4min
completed: 2026-02-04
---

# Phase 18 Plan 02: PhaseAccordion, TaskRow & DependencyIndicator Summary

**Three interconnected components for the initiative detail hierarchy view: expandable phase containers, task rows with tree connectors, and dependency annotations**

## Performance

- **Duration:** 4 min
- **Started:** 2026-02-04
- **Completed:** 2026-02-04
- **Tasks:** 3
- **Files modified:** 3

## Accomplishments
- DependencyIndicator: pure presentational component rendering `^ blocked by: name1, name2` in amber text, returns null when empty
- TaskRow: task row with Unicode tree connectors (├── / └──), StatusBadge, inline agent name in blue, DependencyIndicator for blocked tasks, clickable with hover feedback
- PhaseAccordion: expandable/collapsible phase container with ChevronDown/ChevronRight toggle, phase number + name header, task count (completed/total), StatusBadge, phase-level DependencyIndicator, and TaskRow list when expanded
- All components are presentational — data assembly handled by parent page

## Task Commits

Each task was committed atomically:

1. **Task 1: Create DependencyIndicator component** - `a00b7b5` (feat)
2. **Task 2: Create TaskRow component** - `4becfe8` (feat)
3. **Task 3: Create PhaseAccordion component** - `92d4d36` (feat)

## Files Created/Modified
- `packages/web/src/components/DependencyIndicator.tsx` - Blocked-by annotation with ^ prefix in amber text
- `packages/web/src/components/TaskRow.tsx` - Task row with tree connectors, status badge, agent name, dependency indicator
- `packages/web/src/components/PhaseAccordion.tsx` - Expandable phase container with chevron toggle, task count, status, task list

## Decisions Made
- 18-02: SerializedTask type defined in TaskRow (same Date-to-string serialization pattern as SerializedInitiative)
- 18-02: Phase hierarchy flattened — Plan layer hidden per decision 15-02, tasks rendered directly under phase
- 18-02: Underscore prefix for unused type prop in DependencyIndicator (_type) to satisfy noUnusedParameters

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered
None

## User Setup Required
None - no external service configuration required.

## Next Phase Readiness
- All three components ready for page assembly in Plan 04
- Ready for 18-03-PLAN.md (DecisionList and remaining detail components)

---
*Phase: 18-initiative-detail*
*Completed: 2026-02-04*