chore: archive v1.2 Collection Power-Ups milestone

Archive roadmap and requirements to milestones/, evolve PROJECT.md
with validated requirements, update retrospective, and reorganize
ROADMAP.md with milestone groupings.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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2026-03-16 19:09:13 +01:00
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---
## Milestone: v1.2 — Collection Power-Ups
**Shipped:** 2026-03-16
**Phases:** 3 | **Plans:** 6 | **Files changed:** 66
### What Was Built
- Weight unit conversion (g/oz/lb/kg) with segmented toggle wired across all weight display call sites
- Candidate status tracking (researching/ordered/arrived) with clickable StatusBadge popup
- Sticky search/filter toolbar with text search and icon-aware CategoryFilterDropdown
- Per-setup item classification (base/worn/consumable) with click-to-cycle ClassificationBadge
- Recharts donut chart with category/classification toggle and hover tooltips
- Classification-preserving sync that maintains metadata across atomic setup item re-sync
### What Worked
- Coarse 3-phase structure again — 19 requirements compressed into 3 phases with clear dependency ordering
- TDD red/green commits for schema migrations (status, classification) caught edge cases early
- Vertical slice pattern (schema → service → tests → API → UI in one plan) kept each deliverable self-contained
- Click-outside dismiss pattern established in v1.1 was reused cleanly in StatusBadge and CategoryFilterDropdown
- All 6 plans executed with zero deviations from plan — evidence of mature planning process
### What Was Inefficient
- Some ROADMAP.md plan checkboxes remained unchecked despite summaries existing (persistent cosmetic drift)
- Recharts v3 Cell component is deprecated for v4 — will need migration eventually
- Phase 8 bundled search/filter with candidate status (different concerns) — could have been separate phases for cleaner scope
### Patterns Established
- Click-to-cycle badge: for small enums (3 values), direct click cycling is simpler than popup menus
- Join table metadata preservation: save metadata to Map before atomic sync, restore after re-insert
- CategoryFilterDropdown: reusable filter dropdown (separate from form-based CategoryPicker)
- Chart data transformation: group items by key, sum weights, compute percentages, filter zeroes
- apiPatch helper: PATCH method now available in client API library for partial updates
### Key Lessons
1. Classification belongs on join tables (setupItems), not entity tables (items) — same item has different roles in different contexts
2. Vertical slice delivery (schema → service → test → API → UI) is the optimal plan structure for feature additions
3. Search complexity should match data scale — no debounce needed for <1000 items
4. Recharts composable API (PieChart + Pie + Cell + Tooltip + Label) gives fine-grained chart control with minimal wrapper code
### Cost Observations
- Model mix: quality profile throughout (opus for execution)
- Sessions: 3 continuous auto-advance sessions (one per phase)
- Notable: All plans completed with zero deviations, execution faster than v1.0/v1.1
---
## Cross-Milestone Trends
### Process Evolution
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|-----------|---------|--------|------------|
| v1.0 | 53 | 3 | Initial build, coarse granularity, TDD backend |
| v1.1 | ~30 | 3 | Auto-advance pipeline, parallel wave execution, auto-fix deviations |
| v1.2 | 25 | 3 | Zero-deviation execution, vertical slice pattern, join table metadata |
### Cumulative Quality
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|-----------|-----|-------|-------|
| v1.0 | 5,742 | 114 | Service + route integration |
| v1.1 | 6,134 | ~130 | Service + route integration (updated for icon schema) |
| v1.2 | 7,310 | ~150 | 121 tests (service + route + classification) |
### Top Lessons (Verified Across Milestones)
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2. Service DI pattern enables fast, reliable testing without mocks
3. Always update Zod schemas alongside DB schema — middleware silently strips unvalidated fields
4. Auto-advance pipeline (discuss → plan → execute) works well for clear-scope phases
5. Vertical slice delivery (schema → service → test → API → UI) is optimal for feature additions
6. Join table metadata (not entity table) when same entity plays different roles in different contexts