pirate-station/HANDOFF.md

# Pirate Station - Development Handoff

**Date:** 2026-02-03
**Phase:** Phase 1 (Foundation) Complete
**Next:** Phase 2 (CLI Tool)
**Environment:** Moving from dev machine to Raspberry Pi

---

## Current Status

### ✓ Phase 1: Foundation Complete

All code and configurations are ready. Docker runtime verification deferred to Pi deployment due to corporate proxy blocking Docker Hub access on dev machine.

**Commits:**
- `2691ded` - Go project with HTTP server and health check
- `38edbf6` - Multi-stage Dockerfile for cross-platform builds
- `257edf5` - Plan 01-01 completion
- `6cbf414` - Docker Compose dev environment
- `c09f4d7` - Plan 01-02 completion
- `c8cd06b` - Phase 1 completion metadata

**Requirements Delivered:**
- ✓ **INFRA-01**: Docker container isolation design (runtime verification deferred)
- ✓ **INFRA-02**: Single binary Go backend (fully verified)

---

## What Was Built

### Go HTTP Server
- **Location:** `cmd/server/main.go`, `internal/health/handler.go`
- **Port:** 32768 (high port to avoid Pi service conflicts)
- **Endpoints:**
  - `/` - Returns "Pirate Station API"
  - `/health` - Returns healthy when `/data` mounted, unhealthy otherwise
- **Binary Size:** 4.4MB (amd64), 4.2MB (arm64) - stripped static binary
- **Dependencies:** Go stdlib only (no external packages)

### Docker Configuration
- **Dockerfile:** `docker/Dockerfile`
  - Multi-stage build (golang:1.25-bookworm → debian:bookworm-slim)
  - CGO_ENABLED=0 for static binary
  - Non-root user (appuser, UID 10001)
  - Volume mount at `/data`
  - Multi-arch support via buildx (amd64 + arm64)

- **Compose:** `docker-compose.yml`
  - Dev environment with hot reload
  - Bind mount for live editing
  - Named volume for persistent data

- **Hot Reload:** `.air.toml`
  - Watches Go files for changes
  - Rebuilds automatically to `tmp/server`

---

## Known Blockers

### Docker Hub Registry Access
**Impact:** Cannot build/test Docker images on dev machine
**Cause:** Corporate proxy blocks registry-1.docker.io
**Status:** Deferred to Pi deployment

**Resolution Options:**
1. **Build on Pi** (Recommended) - Pi network config may allow registry access
2. **Configure proxy** - Set `HTTP_PROXY`/`HTTPS_PROXY` in Docker daemon
3. **Use mirror registry** - Modify Dockerfile to use gcr.io or quay.io
4. **Manual base images** - Pre-pull images on different network

---

## First Run on Raspberry Pi

### Prerequisites
- Git configured on Pi
- Docker installed
- Go 1.22+ installed (for local builds)
- Gitea set up (for future image pushes)

### Steps

1. **Clone repository on Pi:**
   ```bash
   git clone <gitea-url>/acty/pirate-station.git
   cd pirate-station
   ```

2. **Verify Go build works:**
   ```bash
   go build -o tmp/server ./cmd/server
   ./tmp/server
   # In another terminal:
   curl http://localhost:32768/
   curl http://localhost:32768/health
   ```

3. **Build Docker image:**
   ```bash
   docker build -f docker/Dockerfile -t pirate-station:latest .
   ```

   If build succeeds, check image size:
   ```bash
   docker images pirate-station:latest --format "{{.Size}}"
   # Should be under 150MB
   ```

4. **Test container isolation:**
   ```bash
   # Create test data volume
   docker volume create pirate-data

   # Run container
   docker run -d --name pirate-test -p 32768:32768 -v pirate-data:/data pirate-station:latest

   # Test endpoints
   curl http://localhost:32768/
   curl http://localhost:32768/health

   # Verify health returns "healthy" (volume is mounted)

   # Cleanup
   docker stop pirate-test
   docker rm pirate-test
   ```

5. **Test dev environment:**
   ```bash
   docker compose up --build
   # Server should start on port 32768
   # Edit cmd/server/main.go and watch for auto-rebuild
   ```

6. **Multi-arch build (optional):**
   ```bash
   docker buildx create --name pirate-builder --use
   docker buildx build --platform linux/amd64,linux/arm64 \
     -f docker/Dockerfile \
     -t gitea.local/acty/pirate-station:latest \
     --push .
   ```

---

## File Structure

```
pirate-station/
├── cmd/
│   └── server/
│       └── main.go              # HTTP server entry point
├── internal/
│   └── health/
│       └── handler.go           # Health check endpoint
├── docker/
│   └── Dockerfile               # Multi-stage container build
├── .planning/                   # GSD planning artifacts
│   ├── PROJECT.md               # Project definition
│   ├── ROADMAP.md               # 6-phase roadmap
│   ├── REQUIREMENTS.md          # 21 v1 requirements
│   ├── STATE.md                 # Current progress
│   └── phases/
│       └── 01-foundation/
│           ├── 01-CONTEXT.md    # Phase 1 decisions
│           ├── 01-RESEARCH.md   # Go/Docker research
│           ├── 01-01-PLAN.md    # Plan 1: Go + Dockerfile
│           ├── 01-01-SUMMARY.md # Plan 1 completion report
│           ├── 01-02-PLAN.md    # Plan 2: Compose + verification
│           ├── 01-02-SUMMARY.md # Plan 2 completion report
│           └── 01-VERIFICATION.md # Phase verification report
├── docker-compose.yml           # Dev environment
├── .air.toml                    # Hot reload config
├── .dockerignore                # Build context exclusions
├── go.mod                       # Go module definition
└── go.sum                       # Dependency checksums
```

---

## Next Steps: Phase 2 - CLI Tool

**Goal:** Admin can manage user accounts via CLI

**Requirements:**
- CLI-01: Create user account
- CLI-02: Delete user account
- CLI-03: Change user password
- CLI-04: List all users

**Before planning Phase 2:**

Run `/gsd:discuss-phase 2` to gather context and make decisions about:
- User storage format (SQLite, JSON, etc.)
- Password hashing algorithm (bcrypt vs argon2)
- CLI tool structure (subcommands vs flags)
- Where user database lives (in /data volume)

**Or skip directly to planning:**

Run `/gsd:plan-phase 2` if you want to proceed without discussion.

---

## Key Decisions Made

| Decision | Rationale |
|----------|-----------|
| Go stdlib only | Minimize binary size, maintain simplicity |
| Port 32768 | High port avoids Pi service conflicts |
| Debian slim base | Better debugging vs Alpine, acceptable size |
| Health check verifies /data | Enables orchestration readiness probes |
| Static binary (CGO_ENABLED=0) | True portability across platforms |
| Non-root container user | Security best practice |
| Multi-stage Dockerfile | 95% smaller image vs single-stage |
| Docker Compose for dev | Bind mount + hot reload for fast iteration |

---

## Commands Reference

### Development
```bash
# Local Go build and run
go build -o tmp/server ./cmd/server
./tmp/server

# Dev environment with hot reload
docker compose up --build

# Test endpoints
curl http://localhost:32768/
curl http://localhost:32768/health
```

### Docker Production
```bash
# Build image
docker build -f docker/Dockerfile -t pirate-station:latest .

# Run container
docker run -d -p 32768:32768 -v pirate-data:/data pirate-station:latest

# Multi-arch build
docker buildx build --platform linux/amd64,linux/arm64 \
  -f docker/Dockerfile -t pirate-station:multiarch .
```

### GSD Commands
```bash
# Resume project
/gsd:resume-work

# Check progress
/gsd:progress

# Plan next phase
/gsd:discuss-phase 2   # Gather context first
/gsd:plan-phase 2      # Create execution plan

# Execute phase
/gsd:execute-phase 2   # Run all plans in phase
```

---

## Verification Checklist for Pi

When you first run on Pi, verify these items to confirm Phase 1 is fully complete:

- [ ] Go binary compiles on Pi
- [ ] Server starts and responds on port 32768
- [ ] Health endpoint returns correct status
- [ ] Docker image builds successfully (no registry errors)
- [ ] Image size is under 150MB
- [ ] Container runs as non-root user (appuser)
- [ ] Container can only access /data volume
- [ ] Host filesystem is isolated (cannot read /tmp/host-secret.txt from container)
- [ ] Docker Compose dev environment starts
- [ ] Hot reload detects Go file changes and rebuilds

Once all items pass, Phase 1 verification is complete and Phase 2 can begin.

---

## Support

- **Planning docs:** `.planning/` directory
- **Verification report:** `.planning/phases/01-foundation/01-VERIFICATION.md`
- **Phase summaries:** `.planning/phases/01-foundation/*-SUMMARY.md`
- **GSD help:** `/gsd:help`

---

*Last updated: 2026-02-03*
*Next session: Raspberry Pi deployment + Phase 2 planning*