docs(03-01): complete setup backend plan

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.planning/REQUIREMENTS.md

@@ -23,9 +23,9 @@ Requirements for initial release. Each maps to roadmap phases.
 
 ### Setups
 
-- [ ] **SETP-01**: User can create named setups (e.g. "Summer Bikepacking")
-- [ ] **SETP-02**: User can add/remove collection items to a setup
-- [ ] **SETP-03**: User can see total weight and cost for a setup
+- [x] **SETP-01**: User can create named setups (e.g. "Summer Bikepacking")
+- [x] **SETP-02**: User can add/remove collection items to a setup
+- [x] **SETP-03**: User can see total weight and cost for a setup
 
 ### Dashboard
 
@@ -82,9 +82,9 @@ Which phases cover which requirements. Updated during roadmap creation.
 | THRD-02 | Phase 2 | Complete |
 | THRD-03 | Phase 2 | Complete |
 | THRD-04 | Phase 2 | Complete |
-| SETP-01 | Phase 3 | Pending |
-| SETP-02 | Phase 3 | Pending |
-| SETP-03 | Phase 3 | Pending |
+| SETP-01 | Phase 3 | Complete |
+| SETP-02 | Phase 3 | Complete |
+| SETP-03 | Phase 3 | Complete |
 | DASH-01 | Phase 3 | Pending |
 
 **Coverage:**

.planning/ROADMAP.md

@@ -61,7 +61,7 @@ Plans:
   2. User can add and remove collection items from a setup
   3. User can see total weight and cost for a setup, computed live from current item data
   4. User sees a dashboard home page with cards linking to their collection, active threads, and setups
-**Plans:** 3 plans
+**Plans:** 1/3 plans executed
 
 Plans:
 - [ ] 03-01-PLAN.md — Backend TDD: setup schema, service, routes, and tests with junction table
@@ -77,4 +77,4 @@ Phases execute in numeric order: 1 -> 2 -> 3
 |-------|----------------|--------|-----------|
 | 1. Foundation and Collection | 4/4 | Complete    | 2026-03-14 |
 | 2. Planning Threads | 3/3 | Complete    | 2026-03-15 |
-| 3. Setups and Dashboard | 0/3 | Not started | - |
+| 3. Setups and Dashboard | 1/3 | In Progress|  |

.planning/STATE.md

@@ -2,16 +2,16 @@
 gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: milestone
-status: completed
-stopped_at: Phase 3 context gathered
-last_updated: "2026-03-15T11:22:28.300Z"
-last_activity: 2026-03-15 — Completed 02-03 visual verification
+status: in_progress
+stopped_at: Completed 03-01-PLAN.md
+last_updated: "2026-03-15T11:43:11.000Z"
+last_activity: 2026-03-15 — Completed 03-01 setup backend
 progress:
   total_phases: 3
   completed_phases: 2
-  total_plans: 7
-  completed_plans: 7
-  percent: 100
+  total_plans: 10
+  completed_plans: 8
+  percent: 80
 ---
 
 # Project State
@@ -21,16 +21,16 @@ progress:
 See: .planning/PROJECT.md (updated 2026-03-14)
 
 **Core value:** Make it effortless to manage gear and plan new purchases — see how a potential buy affects your total setup weight and cost before committing.
-**Current focus:** Phase 2: Planning Threads
+**Current focus:** Phase 3: Setups and Dashboard
 
 ## Current Position
 
-Phase: 2 of 3 (Planning Threads)
-Plan: 3 of 3 in current phase (COMPLETE)
-Status: Phase complete
-Last activity: 2026-03-15 — Completed 02-03 visual verification
+Phase: 3 of 3 (Setups and Dashboard)
+Plan: 1 of 3 in current phase
+Status: In progress
+Last activity: 2026-03-15 — Completed 03-01 setup backend
 
-Progress: [██████████] 100%
+Progress: [████████░░] 80%
 
 ## Performance Metrics
 
@@ -56,6 +56,7 @@ Progress: [██████████] 100%
 | Phase 02 P01 | 5min | 2 tasks | 9 files |
 | Phase 02 P02 | 4min | 2 tasks | 10 files |
 | Phase 02 P03 | 1min | 1 tasks | 0 files |
+| Phase 03 P01 | 8min | 2 tasks | 9 files |
 
 ## Accumulated Context
 
@@ -81,6 +82,8 @@ Recent decisions affecting current work:
 - [Phase 02-02]: Candidate panel runs as separate SlideOutPanel instance with independent uiStore state
 - [Phase 02-02]: Resolution invalidates threads, items, and totals queries for cross-tab data freshness
 - [Phase 02-03]: All four THRD requirements verified working end-to-end in browser
+- [Phase 03-01]: syncSetupItems uses delete-all + re-insert in transaction for simplicity
+- [Phase 03-01]: SQL COALESCE ensures 0 returned for empty setups instead of null
 
 ### Pending Todos
 
@@ -93,6 +96,6 @@ None yet.
 
 ## Session Continuity
 
-Last session: 2026-03-15T11:22:28.298Z
-Stopped at: Phase 3 context gathered
-Resume file: .planning/phases/03-setups-and-dashboard/03-CONTEXT.md
+Last session: 2026-03-15T11:43:11.000Z
+Stopped at: Completed 03-01-PLAN.md
+Resume file: .planning/phases/03-setups-and-dashboard/03-02-PLAN.md

.planning/phases/03-setups-and-dashboard/03-01-SUMMARY.md

@@ -0,0 +1,107 @@
+---
+phase: 03-setups-and-dashboard
+plan: 01
+subsystem: api
+tags: [drizzle, hono, sqlite, junction-table, tdd]
+
+requires:
+  - phase: 01-collection-core
+    provides: items table, categories table, item service pattern, route pattern, test helper
+provides:
+  - Setup CRUD API at /api/setups
+  - Junction table setup_items (many-to-many items-to-setups)
+  - SQL aggregation for setup totals (weight, cost, item count)
+  - syncSetupItems for batch item assignment
+affects: [03-02-setup-frontend, 03-03-dashboard]
+
+tech-stack:
+  added: []
+  patterns: [junction-table-with-cascade, sql-coalesce-aggregation, delete-all-reinsert-sync]
+
+key-files:
+  created:
+    - src/server/services/setup.service.ts
+    - src/server/routes/setups.ts
+    - tests/services/setup.service.test.ts
+    - tests/routes/setups.test.ts
+  modified:
+    - src/db/schema.ts
+    - src/shared/schemas.ts
+    - src/shared/types.ts
+    - src/server/index.ts
+    - tests/helpers/db.ts
+
+key-decisions:
+  - "syncSetupItems uses delete-all + re-insert in transaction for simplicity over diff-based sync"
+  - "SQL COALESCE ensures 0 returned for empty setups instead of null"
+
+patterns-established:
+  - "Junction table pattern: cascade deletes on both FK sides for clean removal"
+  - "Sync pattern: transactional delete-all + re-insert for many-to-many updates"
+
+requirements-completed: [SETP-01, SETP-02, SETP-03]
+
+duration: 8min
+completed: 2026-03-15
+---
+
+# Phase 3 Plan 1: Setup Backend Summary
+
+**Setup CRUD API with junction table, SQL aggregation for totals, and transactional item sync**
+
+## Performance
+
+- **Duration:** 8 min
+- **Started:** 2026-03-15T11:35:17Z
+- **Completed:** 2026-03-15T11:43:11Z
+- **Tasks:** 2 (TDD RED + GREEN)
+- **Files modified:** 9
+
+## Accomplishments
+- Setup CRUD with all 7 API endpoints working
+- Junction table (setup_items) with cascade deletes on both setup and item deletion
+- SQL aggregation returning itemCount, totalWeight, totalCost via COALESCE subqueries
+- Full TDD with 24 new tests (13 service + 11 route), all 87 tests passing
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: RED - Failing tests + schema** - `1e4e74f` (test)
+2. **Task 2: GREEN - Implementation** - `0f115a2` (feat)
+
+## Files Created/Modified
+- `src/db/schema.ts` - Added setups and setupItems table definitions
+- `src/shared/schemas.ts` - Added createSetupSchema, updateSetupSchema, syncSetupItemsSchema
+- `src/shared/types.ts` - Added CreateSetup, UpdateSetup, SyncSetupItems, Setup, SetupItem types
+- `src/server/services/setup.service.ts` - Setup business logic with DB injection
+- `src/server/routes/setups.ts` - Hono API routes for all 7 setup endpoints
+- `src/server/index.ts` - Mounted setupRoutes at /api/setups
+- `tests/helpers/db.ts` - Added setups and setup_items CREATE TABLE statements
+- `tests/services/setup.service.test.ts` - 13 service unit tests
+- `tests/routes/setups.test.ts` - 11 route integration tests
+
+## Decisions Made
+- syncSetupItems uses delete-all + re-insert in transaction for simplicity over diff-based sync
+- SQL COALESCE ensures 0 returned for empty setups instead of null
+- removeSetupItem uses raw SQL WHERE clause for compound condition (setupId + itemId)
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+
+None
+
+## User Setup Required
+
+None - no external service configuration required.
+
+## Next Phase Readiness
+- Setup API complete and tested, ready for frontend consumption in Plan 02
+- Junction table pattern established for any future many-to-many relationships
+
+---
+*Phase: 03-setups-and-dashboard*
+*Completed: 2026-03-15*