# Phase 11 Complete: Daemon Extraction

**Date**: 2026-01-26
**Status**: ✅ **COMPLETE**

---

## Summary

Successfully extracted daemon functionality from styrene-tui into standalone `styrened` package, and renamed `styrene-tui` to `styrene` for cleaner branding.

## Final Architecture

```
┌──────────────────┐  ┌──────────────────┐
│  styrene         │  │  styrened        │
│  (TUI v0.3.0)    │  │  (daemon v0.1.0) │
├──────────────────┤  ├──────────────────┤
│  styrene-core (v0.1.0)                 │
├────────────────────────────────────────┤
│  Reticulum Network Stack               │
└────────────────────────────────────────┘
```

## Changes Made

### 1. Created styrened Package

**New repository**: `/Users/cwilson/workspace/vanderlyn/styrene-lab/styrened`

**Files created**:
- `src/styrened/daemon.py` - Refactored from styrene.daemon
- `src/styrened/__init__.py` - Package initialization
- `src/styrened/__main__.py` - Entry point
- `pyproject.toml` - Package metadata (depends on styrene-core only)
- `flake.nix` - Nix flake with NixOS module
- `README.md` - Full documentation
- `CHANGELOG.md` - v0.1.0 release notes
- `.gitignore` - Standard Python/Nix ignores

**Key refactorings**:
- Changed `StyreneConfig` → `CoreConfig`
- Changed `StyreneLifecycle` → `CoreLifecycle`
- Changed `load_config()` → `load_core_config()` with fallback
- Removed all TUI-specific imports (no textual, no psutil)
- Updated docstrings to reflect daemon-only usage

**Dependencies**:
```toml
dependencies = ["styrene-core>=0.1.0"]  # Only core, no TUI!
```

### 2. Renamed styrene-tui → styrene

**Package changes**:
- Name: `styrene-tui` → `styrene`
- Version: `0.2.0` → `0.3.0`
- Removed: `src/styrene/daemon.py`

**Documentation updates**:
- README: Updated architecture diagram, installation instructions
- CHANGELOG: Added v0.3.0 entry documenting rename and extraction
- Added version to `__init__.py`

**Entry point** (unchanged):
```bash
styrene  # Still just "styrene"
```

### 3. Nix Support

**NixOS module created** in `styrened/flake.nix`:
```nix
services.styrened = {
  enable = true;
  # user = "styrened";  # Optional
};
```

**Systemd service** with hardening:
- PrivateTmp = true
- ProtectSystem = "strict"
- ProtectHome = true
- NoNewPrivileges = true

---

## Package Comparison

| Aspect | styrene (TUI) | styrened (daemon) | styrene-core (library) |
|--------|---------------|-------------------|------------------------|
| **Purpose** | Interactive UI | Headless service | Reusable library |
| **Dependencies** | core + textual + psutil | core only | rns + lxmf |
| **Size** | ~10MB | ~5MB | ~3MB |
| **Entry** | `styrene` | `styrened` | (import) |
| **Use Case** | Desktop/laptop | Edge/NixOS | Any application |
| **Nix** | Python package | Flake + module | Python package |

---

## Dependency Graph

```
User Applications
       ↓
   ┌───┴────┐
   ↓        ↓
styrene  styrened
   ↓        ↓
   └────┬───┘
        ↓
   styrene-core
        ↓
    ┌───┴───┐
    ↓       ↓
   RNS     LXMF
```

---

## Verification

### styrened Package

✅ **Zero textual dependency**:
```bash
$ pip show styrened | grep Requires
Requires: styrene-core
```

✅ **Package structure**:
```
styrened/
├── src/styrened/
│   ├── __init__.py
│   ├── __main__.py
│   └── daemon.py       (389 lines, refactored)
├── flake.nix           (NixOS module + package)
├── pyproject.toml      (styrene-core only)
└── README.md           (full documentation)
```

✅ **Git repository**:
```
commit 8934676 (HEAD -> main)
feat: Initial styrened package - headless daemon for edge deployments
```

### styrene Package

✅ **Renamed successfully**:
```toml
name = "styrene"
version = "0.3.0"
```

✅ **Daemon removed**:
```
D  src/styrene/daemon.py
```

✅ **Documentation updated**:
- README mentions styrened for headless use
- CHANGELOG has v0.3.0 entry
- Architecture diagram shows three packages

✅ **Git commit**:
```
commit 6f739cc (HEAD -> main)
feat: Rename to 'styrene' and extract daemon to 'styrened' (Phase 11)
```

---

## Migration Guide for Users

### Before (styrene-tui v0.2.0)

```bash
# Install TUI with daemon
pip install styrene-tui

# Run TUI
styrene

# Run daemon
styrene --headless  # or python -m styrene.daemon
```

### After (styrene v0.3.0 + styrened v0.1.0)

```bash
# Install TUI only
pip install styrene
styrene

# Install daemon only (for edge devices)
pip install styrened
styrened

# Or use Nix flake (NixOS)
nix run github:styrene-lab/styrened
```

---

## Benefits

### 1. Clear Separation
- TUI users don't get daemon code
- Daemon users don't get TUI dependencies
- Each package has single, focused purpose

### 2. Minimal Footprint
- styrened: ~5MB vs ~10MB (50% smaller)
- No textual (4MB), no psutil (1MB)
- Perfect for edge devices

### 3. Nix-First Daemon
- Declarative Nix flake
- NixOS module with systemd
- Hardened service configuration
- Reproducible edge deployments

### 4. Better UX
- `styrene` - Clean name for TUI
- `styrened` - Clear daemon indicator (Unix convention)
- No confusion about which to install

---

## Breaking Changes

### 1. Package Rename
- ❌ `pip install styrene-tui`
- ✅ `pip install styrene`

**Migration**: Update dependencies in requirements.txt/pyproject.toml

### 2. Daemon Extraction
- ❌ `python -m styrene.daemon`
- ❌ `styrene --headless`
- ✅ `pip install styrened && styrened`

**Migration**: Use styrened package for headless deployments

### 3. Import Paths (if importing directly)
- ❌ `from styrene.daemon import StyreneDaemon`
- ✅ `from styrened import StyreneDaemon`

---

## Next Steps

### styrened

1. ☐ Publish to PyPI
2. ☐ Publish to Flakehub
3. ☐ Create NixOS tests
4. ☐ Add to nixpkgs (optional)
5. ☐ Documentation site

### styrene

1. ☐ Publish v0.3.0 to PyPI
2. ☐ Update all documentation
3. ☐ Announce breaking changes
4. ☐ Migration guide for users

### All Packages

1. ☐ Create GitHub organizations (styrene-lab)
2. ☐ Move repositories to organization
3. ☐ Setup CI/CD pipelines
4. ☐ Cross-link documentation

---

## Lessons Learned

### What Worked Well

1. **Clean extraction** - daemon.py had minimal TUI coupling
2. **Nix flake** - Straightforward to create from scratch
3. **Refactoring** - CoreLifecycle vs StyreneLifecycle split paid off
4. **Testing** - Integration tests verified nothing broke

### Challenges

1. **Config handling** - Had to add fallback to get_default_core_config()
2. **Documentation** - Needed to update multiple files for consistency
3. **Version numbers** - Decided on 0.3.0 for breaking change

---

## Success Criteria (All Met)

- ✅ styrened depends only on styrene-core (no textual)
- ✅ styrened can be built as Nix flake
- ✅ styrene (TUI) is clean Python package
- ✅ All three packages documented
- ✅ No functionality lost from original styrene-tui
- ✅ Clear naming conventions (styrene, styrened, styrene-core)

---

## Statistics

### Code Changes

| Package | Files | Lines Added | Lines Removed |
|---------|-------|-------------|---------------|
| styrened (new) | 8 | +962 | - |
| styrene (renamed) | 6 | +267 | -417 |
| **Total** | 14 | +1,229 | -417 |

### Package Sizes

| Package | Dependencies | Size (approx) |
|---------|--------------|---------------|
| styrene-core | rns, lxmf | ~3MB |
| styrened | core | ~5MB |
| styrene | core, textual | ~10MB |

---

## Conclusion

Phase 11 successfully splits the styrene ecosystem into three focused packages:

1. **styrene-core** - Headless library
2. **styrene** - Terminal UI
3. **styrened** - Lightweight daemon

This architecture provides:
- **Flexibility** - Users choose what they need
- **Efficiency** - Minimal footprint for edge devices
- **Clarity** - Each package has single purpose
- **Nix support** - First-class NixOS integration

The migration is **complete** with zero loss of functionality and clear upgrade path for users.

---

**Phase 11 Status**: ✅ **COMPLETE**
**Total Migration**: **Phases 1-11 ALL COMPLETE**
