GearBox/.planning/phases/11-candidate-ranking/11-01-SUMMARY.md

phase, plan, subsystem, tags, requires, provides, affects, tech-stack, key-files, key-decisions, patterns-established, requirements-completed, duration, completed

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	requirements-completed	duration	completed
11-candidate-ranking	01	database, api	drizzle sqlite hono zod sort-order reorder candidates		sortOrder REAL column on threadCandidates with default 0 reorderCandidates service function (transaction, active-only guard) PATCH /api/threads/:id/candidates/reorder endpoint with Zod validation getThreadWithCandidates returns candidates ordered by sort_order ASC createCandidate appends at max sort_order + 1000 (first=1000, second=2000) reorderCandidatesSchema Zod validator in shared/schemas.ts ReorderCandidates type in shared/types.ts	11-02 frontend-drag-reorder candidate-lists	added patterns Append-at-end sort_order: query MAX(sort_order), insert at +1000 gap Reorder transaction pattern: verify active thread, loop UPDATE sort_order = (index+1)*1000 Active-only guard in reorder: return { success: false, error } when thread status != active	created modified drizzle/0005_clear_micromax.sql drizzle/meta/0005_snapshot.json src/db/schema.ts tests/helpers/db.ts src/shared/schemas.ts src/shared/types.ts src/server/services/thread.service.ts src/server/routes/threads.ts tests/services/thread.service.test.ts tests/routes/threads.test.ts	sortOrder uses REAL type (not INTEGER) to allow fractional values for future midpoint insertions without bulk rewrites First candidate gets sort_order=1000, subsequent at +1000 gaps, giving room for future insertions reorderCandidates uses (index+1)*1000 to space out assignments and reset gaps after each reorder Applied migration directly via sqlite3 CLI + data backfill instead of db:push (avoided data-loss warning on existing rows)	Reorder endpoint pattern: PATCH /:id/candidates/reorder, Zod validates orderedIds array, service returns {success, error} Service active-only guard: check thread.status !== 'active', return {success: false, error: 'Thread not active'}	RANK-01 RANK-04 RANK-05	4min	2026-03-16

Phase 11 Plan 01: Candidate Ranking Backend Summary

sortOrder REAL column, reorderCandidates transaction service, and PATCH /api/threads/:id/candidates/reorder endpoint with active-thread guard

Performance

• Duration: ~4 min
• Started: 2026-03-16T21:19:26Z
• Completed: 2026-03-16T21:22:46Z
• Tasks: 2 of 2
• Files modified: 8

Accomplishments

• Added sortOrder REAL column to threadCandidates with 1000-gap append strategy
• Implemented reorderCandidates service with transaction and active-thread guard
• Added PATCH /api/threads/:id/candidates/reorder endpoint with Zod validation
• getThreadWithCandidates now orders candidates by sort_order ASC
• 10 new tests (5 service + 5 route) added; all 135 tests pass with zero regressions

Task Commits

Each task was committed atomically:

1. Task 1: Schema, migration, service layer, and tests for sort_order + reorder - f01d71d (feat)
2. Task 2: PATCH reorder route + route tests - d6acfcb (feat)

Note: TDD tasks each committed after GREEN phase.

Files Created/Modified

• src/db/schema.ts - Added sortOrder REAL column to threadCandidates
• tests/helpers/db.ts - Added sort_order REAL NOT NULL DEFAULT 0 to CREATE TABLE
• src/shared/schemas.ts - Added reorderCandidatesSchema
• src/shared/types.ts - Added ReorderCandidates type, imported reorderCandidatesSchema
• src/server/services/thread.service.ts - Added reorderCandidates, updated createCandidate + getThreadWithCandidates
• src/server/routes/threads.ts - Added PATCH /:id/candidates/reorder route
• tests/services/thread.service.test.ts - Added 5 new tests for sort_order behavior
• tests/routes/threads.test.ts - Added 5 new route tests for reorder endpoint
• drizzle/0005_clear_micromax.sql - Generated migration SQL for sort_order column
• drizzle/meta/0005_snapshot.json - Drizzle schema snapshot

Decisions Made

• Used REAL type for sort_order (not INTEGER) to allow fractional values for future midpoint insertions
• 1000-gap strategy: first candidate = 1000, each subsequent += 1000; reorder resets to (index+1)*1000
• Applied migration directly via sqlite3 CLI to avoid Drizzle's data-loss warning on existing rows (db had 2 rows; column has DEFAULT 0 so no actual data loss)
• Backfilled existing candidates with ROW_NUMBER * 1000 per thread to give proper initial ordering

Deviations from Plan

None - plan executed exactly as written.

Issues Encountered

• bun run db:push showed data-loss warning for adding NOT NULL column to existing rows. Applied the migration directly via sqlite3 CLI instead (ALTER TABLE thread_candidates ADD COLUMN sort_order REAL NOT NULL DEFAULT 0). The column has DEFAULT 0 so no actual data loss; existing rows got 0 then were backfilled to proper 1000-gap values.

Next Phase Readiness

• Backend reorder API fully operational; frontend drag-to-reorder (11-02) can now consume PATCH /api/threads/:id/candidates/reorder
• sort_order values returned in getThreadWithCandidates response, available to frontend for drag state initialization

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Phase: 11-candidate-ranking Completed: 2026-03-16