# Session Note: Module Config & Migrations Infrastructure

**Date:** 2026-01-28
**Focus:** Self-contained module configuration and migrations auto-discovery

## Summary

Completed the infrastructure for fully self-contained modules with config and migrations auto-discovery. All modules now have placeholder files ready for the final migration phase.

## What Was Done

### 1. Module Config Auto-Discovery

Created `app/modules/config.py` that auto-discovers module configurations:

```python
from app.modules.config import get_module_config

marketplace_config = get_module_config("marketplace")
```

Each module now has a `config.py` placeholder:

```python
# app/modules/marketplace/config.py
class MarketplaceConfig(BaseSettings):
    model_config = {"env_prefix": "MARKETPLACE_"}

config = MarketplaceConfig()
```

### 2. Module Migrations Directories

Created `migrations/versions/` directories for all 11 self-contained modules:
- analytics, billing, cms, customers, dev_tools
- inventory, marketplace, messaging, monitoring, orders, payments

Each with required `__init__.py` files for Alembic discovery.

### 3. New Architecture Rules

Added rules MOD-013 to MOD-015:

| Rule | Description |
|------|-------------|
| MOD-013 | config.py should export `config` or `config_class` |
| MOD-014 | Migrations must follow naming convention `{module}_{seq}_{desc}.py` |
| MOD-015 | Migrations directory must have `__init__.py` files |

### 4. Module Migration Commits

Committed all pending module migration work:

| Commit | Description |
|--------|-------------|
| `2466dfd` | feat: add module config and migrations auto-discovery infrastructure |
| `bd2c99a` | feat: complete analytics module self-containment |
| `f79e67d` | feat: complete billing module self-containment |
| `b74d134` | feat: complete marketplace module self-containment |
| `705d336` | feat: add self-contained structure to remaining modules |
| `d987274` | feat: complete dev_tools module self-containment |
| `37cf74c` | refactor: update registry and main.py for module auto-discovery |
| `3ffa337` | refactor: convert legacy models/schemas to re-exports |
| `bf871dc` | refactor: convert legacy services/tasks to re-exports |
| `fbcf079` | chore: update API routers, validation, and docs |

### 5. Documentation Updates

- `docs/architecture/module-system.md` - Added Module Configuration and Module Migrations sections
- `docs/development/creating-modules.md` - Added config.py pattern, updated migrations docs

## Current Module Status

| Module | definition.py | config.py | migrations/ | routes/api/ | routes/pages/ | locales/ | Status |
|--------|--------------|-----------|-------------|-------------|---------------|----------|--------|
| analytics | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | **Complete** |
| billing | ✅ | ✅ | ✅ | ✅ | ⚠️ | ✅ | Needs pages |
| cms | ✅ | ✅ | ✅ | ✅ | ✅ | - | **Complete** |
| customers | ✅ | ✅ | ✅ | ⚠️ | ⚠️ | - | Needs routes |
| dev_tools | ✅ | ✅ | ✅ | ✅ | - | - | **Complete** |
| inventory | ✅ | ✅ | ✅ | ⚠️ | ⚠️ | - | Needs routes |
| marketplace | ✅ | ✅ | ✅ | ✅ | ⚠️ | ✅ | Needs pages |
| messaging | ✅ | ✅ | ✅ | ⚠️ | ⚠️ | - | Needs routes |
| monitoring | ✅ | ✅ | ✅ | ⚠️ | ⚠️ | - | Needs routes |
| orders | ✅ | ✅ | ✅ | ⚠️ | ⚠️ | - | Needs routes |
| payments | ✅ | ✅ | ✅ | ⚠️ | ⚠️ | - | Needs routes |
| core | ✅ | - | - | - | - | - | Minimal |
| tenancy | ✅ | - | - | - | - | - | Minimal |

## Decisions Made

1. **Config is environment-based**: Each module uses Pydantic Settings with `{MODULE}_` prefix
2. **Migrations stay central for now**: Existing migrations remain in `alembic/versions/`, module directories are for future changes
3. **Migration reorganization deferred**: Will move existing migrations to modules before production
4. **Legacy files become re-exports**: Original files in `models/database/`, `models/schema/`, `app/services/` re-export from modules

## Tomorrow's Tasks

### Phase 1: Module Alignment Audit

Run architecture validator and fix all modules to comply with rules:

```bash
python scripts/validate_architecture.py
```

Check each module for:
- [ ] MOD-001: Required directories exist
- [ ] MOD-002: Services contain actual code (not re-exports)
- [ ] MOD-003: Schemas contain actual code (not re-exports)
- [ ] MOD-004: Routes import from module, not legacy
- [ ] MOD-005: Templates and static exist for UI modules
- [ ] MOD-008: exceptions.py exists
- [ ] MOD-010: Routes export `router` variable
- [ ] MOD-011: Tasks have `__init__.py`

### Phase 2: Complete Module Routes Migration

Move remaining routes to self-contained structure:

1. **customers** - Move routes from `app/api/v1/*/customers.py`
2. **inventory** - Move routes from `app/api/v1/*/inventory.py`
3. **messaging** - Move routes from `app/api/v1/*/messages.py`
4. **monitoring** - Move routes from `app/api/v1/admin/monitoring.py`
5. **orders** - Move routes from `app/api/v1/*/orders.py`
6. **payments** - Move routes from `app/api/v1/*/payments.py`

### Phase 3: Migration Reorganization (Pre-Production)

Move existing migrations to module-specific directories:

1. Identify which tables belong to which module
2. Create baseline migrations in module directories
3. Test migration chain works correctly
4. Remove/reorganize central migrations

### Phase 4: Validation & Testing

1. Run full architecture validation
2. Test all routes are accessible
3. Test module enable/disable functionality
4. Verify Alembic discovers all migrations

## Files Changed

### New Files
- `app/modules/config.py` - Config auto-discovery
- `app/modules/*/config.py` - Module config placeholders (11 files)
- `app/modules/*/migrations/__init__.py` - Migration package markers (11 modules)
- `app/modules/*/migrations/versions/__init__.py` - Version package markers (11 modules)
- `.architecture-rules/module.yaml` - Module validation rules

### Modified Files
- `docs/architecture/module-system.md` - Added config/migrations sections
- `docs/development/creating-modules.md` - Added config pattern, updated migrations

## Related Documentation

- [Module System Architecture](../architecture/module-system.md)
- [Creating Modules Guide](../development/creating-modules.md)
- [Module Migration Plan](module-migration-plan.md)
