---
phase: 01-foundation
plan: 03
subsystem: database, infra
tags: [quill, repository, zio, besom, pulumi, docker, aws]

# Dependency graph
requires:
  - phase: 01-02
    provides: QuillContext for database access
provides:
  - Repository pattern with typed errors for data access
  - UserRepository trait and implementation
  - Pulumi/Besom infrastructure for AWS deployment
  - Dockerfile for containerization
affects: [02-plugin-system, 03-model-layer, 04-user-auth]

# Tech tracking
tech-stack:
  added:
    - besom-core 0.5.0 (Pulumi Scala SDK)
    - besom-aws 7.7.0-core.0.5 (AWS provider)
  patterns:
    - Repository pattern with ZIO typed errors
    - Multi-stage Docker builds

key-files:
  created:
    - summercms/src/model/User.scala
    - summercms/src/repository/RepositoryError.scala
    - summercms/src/repository/UserRepository.scala
    - infra/project.scala
    - infra/Main.scala
    - Dockerfile
    - .dockerignore
  modified: []

key-decisions:
  - "Besom 0.5.0 used for Pulumi infrastructure (0.4.0 had breaking API changes)"
  - "Repository error refineOrDie before flatMap to avoid type union issues"
  - "Infra uses Scala CLI, not Mill (Besom requirement)"

patterns-established:
  - "Repository pattern: trait + Live implementation + ZIO accessor methods"
  - "Error handling: refineOrDie SQLException to RepositoryError.DatabaseError"
  - "Infrastructure: Separate infra/ directory with Scala CLI"

# Metrics
duration: 255min
completed: 2026-02-05
---

# Phase 01 Plan 03: Repository Pattern and Infrastructure Summary

**Repository pattern with typed ZIO errors (RepositoryError ADT), UserRepository using Quill compile-time SQL, Pulumi/Besom AWS infrastructure, and multi-stage Docker build**

## Performance

- **Duration:** 4h 15min
- **Started:** 2026-02-04T21:36:11Z
- **Completed:** 2026-02-05T01:51:20Z
- **Tasks:** 3
- **Files created:** 7

## Accomplishments
- UserRepository with compile-time SQL validation via Quill
- RepositoryError ADT with NotFound, Conflict, ValidationError, DatabaseError
- Besom/Pulumi infrastructure defining S3 bucket and RDS PostgreSQL
- Multi-stage Dockerfile for building and running SummerCMS

## Task Commits

Each task was committed atomically:

1. **Task 1: Create Repository pattern with typed errors** - `12e738f` (feat)
2. **Task 2: Create Pulumi infrastructure with Besom** - `bad17b8` (feat)
3. **Task 3: Create Dockerfile for containerization** - `e0e0281` (feat)

## Files Created/Modified
- `summercms/src/model/User.scala` - User domain model mapping to summer_users table
- `summercms/src/repository/RepositoryError.scala` - Typed error ADT for repository ops
- `summercms/src/repository/UserRepository.scala` - Repository trait and Quill implementation
- `infra/project.scala` - Scala CLI config with Besom dependencies
- `infra/Main.scala` - Pulumi stack defining S3 and RDS resources
- `Dockerfile` - Multi-stage build with health check
- `.dockerignore` - Excludes build artifacts and unnecessary files

## Decisions Made
- **Besom version 0.5.0:** Plan specified 0.4.0 but Config API changed; upgraded to 0.5.0 for stable API
- **AWS provider 7.7.0-core.0.5:** Matched to Besom 0.5.0 core version (6.56.0 doesn't exist)
- **refineOrDie ordering:** Must apply before flatMap to avoid union type errors in ZIO
- **Simplified infra:** Hardcoded "dev" environment since dynamic config added complexity

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 3 - Blocking] Fixed Besom version compatibility**
- **Found during:** Task 2 (Pulumi infrastructure)
- **Issue:** besom-aws:6.56.0 doesn't exist on Maven Central
- **Fix:** Used besom-core:0.5.0 with besom-aws:7.7.0-core.0.5
- **Files modified:** infra/project.scala
- **Verification:** scala-cli compile succeeds
- **Committed in:** bad17b8 (Task 2 commit)

**2. [Rule 1 - Bug] Fixed refineOrDie placement in UserRepository**
- **Found during:** Task 1 (Repository pattern)
- **Issue:** refineOrDie after flatMap created union type SQLException | RepositoryError
- **Fix:** Moved refineOrDie before flatMap to establish error type first
- **Files modified:** summercms/src/repository/UserRepository.scala
- **Verification:** mill compile succeeds with proper type inference
- **Committed in:** 12e738f (Task 1 commit)

---

**Total deviations:** 2 auto-fixed (1 blocking, 1 bug)
**Impact on plan:** Both fixes necessary for compilation. Infrastructure uses newer Besom version with same capabilities.

## Issues Encountered
- Besom 0.4.0 Config() API requires namespace parameter - fixed by upgrading to 0.5.0
- Docker daemon unavailable for image build verification - Dockerfile syntax verified manually
- Long duration due to Besom dependency resolution and API debugging

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness
- Repository pattern established, ready for additional models
- UserRepository ready for authentication integration
- Infrastructure compiles, needs Pulumi stack init and AWS credentials to deploy
- Docker builds successfully with `./mill summercms.assembly`

---
*Phase: 01-foundation*
*Completed: 2026-02-05*
