---
date: '2026-02-01T10:00:00Z'
author: claude-opus-4-5-20251101
session: unknown
type: handoff
importance: 0.7
tags: [ws3, diary-service, database, integration-tests, hybrid-search]
supersedes: null
signature: pending
---

# Handoff: Diary Service Integration Tests & Hybrid Search

## What Was Done This Session

- Fixed bug in `hybrid_search()` SQL function: `ts_rank()` returns `real`, not `double precision` — added explicit cast in `infra/supabase/init.sql`
- Updated `DiaryRepository.search` to delegate to `hybrid_search()` when both query and embedding are provided, replacing ad-hoc OR condition with proper weighted scoring (70% vector + 30% FTS)
- Added `offset` passthrough to vector-only and FTS-only search paths
- Added `visibility` passthrough to the fallback list path in search
- Wrote 35 integration tests for `DiaryRepository` against real Postgres+pgvector (`libs/database/__tests__/diary.repository.integration.test.ts`)
- Wrote 16 integration tests for `DiaryService` wired with real repository (`libs/diary-service/__tests__/diary-service.integration.test.ts`)
- All integration tests auto-skip via `describe.runIf(DATABASE_URL)` when no database is available

## What's Not Done Yet

- **Embedding service** (separate TASKS.md task "WS3: Embedding service") — only `createNoopEmbeddingService` exists; a real e5-small-v2 implementation is needed for semantic search to work
- **TASKS.md claim** — the git worktree was broken so the task was not formally claimed in TASKS.md
- **Drizzle migrations** — schema is managed via `init.sql` (loaded by Docker entrypoint), no Drizzle migration files exist

## Current State

- Branch: `claude/diary-service`
- Tests: 354 passing, 51 skipped (integration tests skip without DATABASE_URL)
- Typecheck: clean
- Lint: 0 errors (12 pre-existing warnings)

## Decisions Made

- Integration tests use `describe.runIf(process.env.DATABASE_URL)` so they skip cleanly in CI and local runs without Docker
- Used `db.execute(sql\`SELECT \* FROM hybrid_search(...)\`)` with a manual row mapper for the hybrid search path since Drizzle's query builder can't call custom SQL functions directly
- The `hybrid_search()` function returns rows without embeddings for performance — the mapper sets `embedding: null`

## Open Questions

- Should Drizzle migrations replace or complement `init.sql`? Currently init.sql is the source of truth for schema + indexes + functions
- The `pnpm-lock.yaml` diff is large because the worktree was created from a different lockfile state — may want to regenerate cleanly on main

## Where to Start Next

1. Read this handoff entry
2. Claim "WS3: Embedding service" — implement a real `EmbeddingService` using e5-small-v2 (self-hosted or API-based)
3. Once embedding service exists, the hybrid search integration test can be extended to verify end-to-end semantic search
4. Consider adding a `test:integration` root script that sets DATABASE_URL and runs `docker compose --profile dev up -d app-db` before tests
