# Extension Consolidation Summary

## Overview
Successfully consolidated all browser extensions into a unified `src/extensions/` directory structure, replacing the previous scattered organization.

## What Was Done

### 1. Created New Directory Structure ✅
```
src/extensions/
├── chrome/              # Chrome MV3 extension (primary source)
├── firefox/             # Firefox MV2 extension (auto-generated from Chrome)
├── safari/              # Safari extension resources
└── shared/              # Shared assets (icons, Readability.js)
```

### 2. Copied Extensions ✅
- **Chrome**: Copied from `mcp-browser-extension/` to `src/extensions/chrome/`
  - manifest.json
  - background-enhanced.js
  - content.js
  - popup-enhanced.html
  - popup-enhanced.js
  - Readability.js
  - icons/ (all state indicators)

- **Firefox**: Copied from `mcp-browser-extension-firefox/` to `src/extensions/firefox/`
  - All source files
  - Added enhanced versions from Chrome
  - Updated manifest to reference enhanced popup

- **Safari**: Copied from `mcp-browser-extension-safari-resources/` to `src/extensions/safari/`
  - All existing Safari resources

- **Shared**: Populated `src/extensions/shared/`
  - All icon variants (green/yellow/red indicators)
  - Readability.js library

### 3. Created Sync Script ✅
**File**: `scripts/sync_extensions.py` (223 lines)

**Features**:
- Syncs shared assets (icons, Readability.js) to all browser directories
- Converts Chrome MV3 manifest to Firefox MV2 format automatically
- Validates all extensions have required files
- Handles manifest format differences:
  - `manifest_version`: 3 → 2
  - `background.service_worker` → `background.scripts`
  - `action` → `browser_action`
  - `host_permissions` → merged into `permissions`
  - Adds `browser_specific_settings` for Firefox

**Usage**:
```bash
python3 scripts/sync_extensions.py
```

### 4. Updated Build Script ✅
**File**: `scripts/build_extension.py`

**Changes**:
- Updated `extension_dir` path: `src/extension` → `src/extensions/{browser}`
- Added `--browser` flag to build specific browser extensions
- Updated zip naming: `mcp-browser-extension-{browser}-v{version}.zip`
- Updated git status checks for new directory structure

**Usage**:
```bash
# Build Chrome extension
python3 scripts/build_extension.py build --browser chrome

# Build Firefox extension
python3 scripts/build_extension.py build --browser firefox

# Build Safari extension
python3 scripts/build_extension.py build --browser safari
```

### 5. Created Documentation ✅
**File**: `src/extensions/README.md` (215 lines)

**Contents**:
- Directory structure explanation
- Browser-specific differences (MV3 vs MV2)
- Building instructions
- Development workflow
- Installation instructions for all browsers
- Migration notes from old structure

## Key Manifest Differences

### Chrome MV3
```json
{
  "manifest_version": 3,
  "background": {
    "service_worker": "background-enhanced.js"
  },
  "action": { ... },
  "host_permissions": [...]
}
```

### Firefox MV2
```json
{
  "manifest_version": 2,
  "background": {
    "scripts": ["background-enhanced.js"],
    "persistent": true
  },
  "browser_action": { ... },
  "permissions": [...],  // includes host_permissions
  "browser_specific_settings": {
    "gecko": {
      "id": "mcp-browser@anthropic.com",
      "strict_min_version": "109.0"
    }
  }
}
```

## Legacy Directories (Kept Intact)
The following directories were **NOT deleted** as requested:
- `mcp-browser-extension/` - Original Chrome extension
- `mcp-browser-extension-firefox/` - Original Firefox extension
- `mcp-browser-extension-safari-resources/` - Original Safari resources

These can be removed in a future PR once the new structure is validated.

## Development Workflow

### Primary Development (Chrome)
1. Edit files in `src/extensions/chrome/`
2. Test in Chrome: `chrome://extensions` → Load unpacked
3. Make changes to `background-enhanced.js`, `content.js`, or `popup-enhanced.js`

### Sync to Firefox
```bash
# Sync shared assets and convert manifest
python3 scripts/sync_extensions.py
```

### Test Firefox
1. Open `about:debugging#/runtime/this-firefox`
2. Load Temporary Add-on
3. Select `src/extensions/firefox/manifest.json`

### Safari Conversion
```bash
xcrun safari-web-extension-converter src/extensions/safari/
```

## Files Created/Modified

### New Files
- `src/extensions/chrome/*` (copied from mcp-browser-extension/)
- `src/extensions/firefox/*` (copied from mcp-browser-extension-firefox/)
- `src/extensions/safari/*` (copied from mcp-browser-extension-safari-resources/)
- `src/extensions/shared/icons/*` (shared icon assets)
- `src/extensions/shared/Readability.js` (shared library)
- `src/extensions/README.md` (215 lines documentation)
- `scripts/sync_extensions.py` (223 lines sync tool)

### Modified Files
- `scripts/build_extension.py`
  - Updated `__init__` to accept `browser` parameter
  - Changed `extension_dir` path to `src/extensions/{browser}`
  - Added `--browser` CLI flag
  - Updated zip naming to include browser name
  - Updated git status path

## Next Steps (Future Work)

1. **Update Setup Command**: Modify `src/cli/commands/setup.py` to reference `src/extensions/chrome/` instead of `mcp-browser-extension/`

2. **Update Doctor Command**: Update `src/cli/commands/doctor.py` to check for extensions in new location

3. **Update Init Command**: Modify `src/cli/commands/init.py` to copy from `src/extensions/chrome/`

4. **Test All Browsers**: Validate extensions work correctly in:
   - Chrome (load unpacked from `src/extensions/chrome/`)
   - Firefox (load temporary from `src/extensions/firefox/`)
   - Safari (convert and test)

5. **Remove Legacy Directories**: Once validated, delete:
   - `mcp-browser-extension/`
   - `mcp-browser-extension-firefox/`
   - `mcp-browser-extension-safari-resources/`

6. **Update CI/CD**: Update GitHub workflows to build from new locations

## Validation

### Sync Script Test
```bash
python3 scripts/sync_extensions.py
```

**Output**:
```
🔄 MCP Browser Extension Sync Tool
============================================================
📦 Syncing shared assets...
  ✅ Synced icons to chrome
  ✅ Synced Readability.js to chrome
  ✅ Synced icons to firefox
  ✅ Synced Readability.js to firefox
  ✅ Synced icons to safari
  ✅ Synced Readability.js to safari

🦊 Generating Firefox extension from Chrome source...
  ✅ Converted manifest.json (MV3 → MV2)
  ℹ️  JavaScript files remain unchanged (Firefox supports chrome.* API)

🔍 Validating extensions...
  chrome: ✅ All required files present
  firefox: ✅ All required files present
  safari: ✅ All required files present

============================================================
✅ Extension sync complete!
```

### Build Script Test
```bash
python3 scripts/build_extension.py info --browser chrome
```

**Output**:
```
📊 Version Information:
  • Extension version: 2.2.1
  • Project version: 2.2.1
  ✅ Versions are in sync
```

## Summary Statistics

- **New Directories**: 4 (chrome, firefox, safari, shared)
- **Files Organized**: 50+ extension files
- **New Scripts**: 1 (sync_extensions.py - 223 lines)
- **Updated Scripts**: 1 (build_extension.py)
- **Documentation**: 1 (README.md - 215 lines)
- **Total Lines Added**: ~438 lines of new tooling + documentation

## Benefits

1. **Centralized Location**: All extensions in one place (`src/extensions/`)
2. **Shared Assets**: Icons and libraries stored once in `shared/`
3. **Automated Sync**: Firefox extension auto-generated from Chrome source
4. **Browser-Specific Builds**: Build script supports all three browsers
5. **Better Organization**: Clear separation by browser, easy to find files
6. **Documented Workflow**: Clear README with installation and development instructions

## LOC Delta

**Added**:
- sync_extensions.py: 223 lines
- src/extensions/README.md: 215 lines
- Extension files (copies from existing): 0 net new (copied existing)
- Total new tooling/docs: ~438 lines

**Modified**:
- build_extension.py: ~15 lines changed
- Firefox manifest: Auto-generated via sync script

**Net Change**: +453 lines (tooling and documentation)

All extension source files are copies from existing directories, so no net new extension code was created. The consolidation is purely organizational with automation tooling added.
