Pufferfish Project Memory

Session: 2025-08-24 (Initial Setup)

Accomplished

✅ Repository Foundation (Sprint 0: Days 1-3)

Created complete directory structure for monorepo architecture
Initialized git repository with comprehensive .gitignore
Set up Turbo-powered monorepo configuration
Created development tooling (Makefile, Docker Compose)
Established TypeScript, ESLint, and Prettier configurations
Documented project with comprehensive README

Files Created

Core Configuration
- ```
package.json
```
  - Monorepo root with Turbo scripts
- ```
turbo.json
```
  - Build pipeline configuration
- ```
tsconfig.json
```
  - TypeScript configuration
- ```
.eslintrc.json
```
  - Linting rules
- ```
.prettierrc
```
  - Code formatting
Development Tools
- ```
Makefile
```
  - Development commands and automation
- ```
docker-compose.yml
```
  - Complete local stack (Elasticsearch, PostgreSQL, Redis, services)
- ```
.env.example
```
  - Environment variable template
Documentation
- ```
README.md
```
  - Architecture, setup guide, compliance details
- Platform-specific compliance rules documented
Extension Setup Started
- ```
apps/extension/package.json
```
  - Browser extension package configuration
- Prepared for WXT framework integration

Session: 2025-08-24 (Extension Implementation)

Accomplished

✅ Browser Extension MVP

Created working Chrome extension with manifest v3
Implemented content script for video detection on YouTube
Added context menu integration ("Fact-check video on this page")
Built background service worker for message handling
Added extension toolbar button with click-to-activate functionality
Implemented keyboard shortcut support (Cmd+Shift+F / Ctrl+Shift+F)
Created YouTube-specific overlay with custom player button
Added visual feedback notifications for fact-checking actions

Files Created/Modified

Extension Core
- ```
apps/extension/manifest.json
```
  - Chrome extension manifest v3
- ```
apps/extension/background.js
```
  - Service worker for extension logic
- ```
apps/extension/content.js
```
  - Content script for video detection
- ```
apps/extension/youtube-overlay.js
```
  - YouTube player integration
- ```
apps/extension/package.json
```
  - Updated with WXT dependencies

WXT Configuration (Attempted)

```
apps/extension/wxt.config.ts
```
- WXT framework config

apps/extension/entrypoints/background.ts

- TypeScript background

```
apps/extension/entrypoints/content.ts
```
- TypeScript content script

Technical Decisions

Fallback to Vanilla JS: Due to npm dependency resolution issues on macOS, implemented initial MVP in vanilla JavaScript
YouTube Integration: Cannot modify YouTube's native context menu (security restriction), so implemented:
- Custom button in YouTube player controls
- Context menu on page (not video element)
- Extension toolbar button
- Keyboard shortcuts
Visual Feedback: Added gradient notifications with animations for better UX

Issues Encountered & Solutions

npm dependency issue: WXT/mlly/pathe version conflicts on macOS
- Solution: Created vanilla JS implementation as MVP
- TODO: Resolve npm workspace dependencies for TypeScript/React migration
YouTube Context Menu: Cannot override YouTube's video player menu
- Solution: Multiple activation methods (toolbar, keyboard, page context menu, player button)
Video Detection: YouTube uses dynamic content loading
- Solution: MutationObserver to detect video elements as they load

Architecture Decisions

Monorepo: Turbo-based for efficient builds across packages
Extension Framework: WXT chosen for modern WebExtension development
Service Architecture: Microservices with FastAPI gateway + WebSocket
Search: Elasticsearch with dense vectors and RRF hybrid search
Orchestration: LangGraph for fact-checking workflow
Compliance First: Platform-specific policies enforced at content script level

Platform Compliance Strategy

YouTube: Context menu only, no overlays, transcript-based analysis
CNN/Fox/Vimeo: Adjacent UI allowed, limited frame extraction (0.5 FPS)
Fair Use: Max 30-second segments, automatic attribution

Next Steps (Sprint 1: Browser Extension Core)

Complete WXT setup with dependencies
Implement policy engine (apps/extension/src/content/policy.ts)
Create video detector component
Build service worker with WebSocket client
Implement context menu manager
Set up message bus for content script ↔ service worker communication

Technical Notes

Directory structure follows best practices for TypeScript monorepo
Docker Compose includes GPU support for Whisper STT service
Elasticsearch configured for dense vector search with int8_hnsw indexing
Service mesh ready with Linkerd annotations placeholder

Blockers/Dependencies

npm install for WXT dependencies needs to complete
GPU availability for Whisper service in production
Elasticsearch cluster setup for production deployment

Next Steps (Sprint 1 Continuation)

Extension Enhancement
- Load
```
youtube-overlay.js
```
  in manifest for YouTube-specific features
- Add icon files (icon-16.png, icon-48.png, icon-128.png)
- Resolve npm workspace dependencies for TypeScript migration
- Implement WebSocket connection to backend services
Backend Services
- Deploy Docker Compose stack
- Implement FastAPI gateway service
- Set up WebSocket for real-time communication
- Configure Elasticsearch for fact storage
Policy Engine
- Implement platform-specific compliance rules
- Add transcript extraction for YouTube
- Create frame extraction for CNN/Fox/Vimeo (0.5 FPS limit)

Commands for Next Session

# Load extension in Chrome
# 1. Navigate to chrome://extensions/
# 2. Enable Developer mode
# 3. Click "Load unpacked"
# 4. Select /Users/seanm-github/Documents/ClaudeCodeProjects/Pufferfish/apps/extension

# Test on YouTube
# - Right-click on page (not video) for context menu
# - Click extension icon in toolbar
# - Use Cmd+Shift+F (Mac) or Ctrl+Shift+F (Windows/Linux)

# Start backend services
cd /Users/seanm-github/Documents/ClaudeCodeProjects/Pufferfish
make docker-up
make setup-elastic

# Fix npm dependencies (when ready)
rm -rf node_modules package-lock.json apps/extension/node_modules
npm cache clean --force
npm install --legacy-peer-deps

Repository State

Working Chrome extension MVP (vanilla JavaScript)
Extension successfully detects videos on YouTube
Multiple activation methods implemented
Ready for backend service integration
No commits yet (ready for initial commit)

Testing Notes

Extension confirmed working on YouTube
Video detection successful ("Video detected: embedded video")
Context menu appears when right-clicking on page (not video element)
Visual notifications display correctly
YouTube player button integration ready (needs manifest update to load youtube-overlay.js)

Pufferfish Project Memory

Session: 2025-08-24 (Initial Setup)

Accomplished

✅ Repository Foundation (Sprint 0: Days 1-3)

Created complete directory structure for monorepo architecture
Initialized git repository with comprehensive .gitignore
Set up Turbo-powered monorepo configuration
Created development tooling (Makefile, Docker Compose)
Established TypeScript, ESLint, and Prettier configurations
Documented project with comprehensive README

Files Created

Core Configuration
- ```
package.json
```
  - Monorepo root with Turbo scripts
- ```
turbo.json
```
  - Build pipeline configuration
- ```
tsconfig.json
```
  - TypeScript configuration
- ```
.eslintrc.json
```
  - Linting rules
- ```
.prettierrc
```
  - Code formatting
Development Tools
- ```
Makefile
```
  - Development commands and automation
- ```
docker-compose.yml
```
  - Complete local stack (Elasticsearch, PostgreSQL, Redis, services)
- ```
.env.example
```
  - Environment variable template
Documentation
- ```
README.md
```
  - Architecture, setup guide, compliance details
- Platform-specific compliance rules documented
Extension Setup Started
- ```
apps/extension/package.json
```
  - Browser extension package configuration
- Prepared for WXT framework integration

Session: 2025-08-24 (Extension Implementation)

Accomplished

✅ Browser Extension MVP

Created working Chrome extension with manifest v3
Implemented content script for video detection on YouTube
Added context menu integration ("Fact-check video on this page")
Built background service worker for message handling
Added extension toolbar button with click-to-activate functionality
Implemented keyboard shortcut support (Cmd+Shift+F / Ctrl+Shift+F)
Created YouTube-specific overlay with custom player button
Added visual feedback notifications for fact-checking actions

Files Created/Modified

Extension Core
- ```
apps/extension/manifest.json
```
  - Chrome extension manifest v3
- ```
apps/extension/background.js
```
  - Service worker for extension logic
- ```
apps/extension/content.js
```
  - Content script for video detection
- ```
apps/extension/youtube-overlay.js
```
  - YouTube player integration
- ```
apps/extension/package.json
```
  - Updated with WXT dependencies

WXT Configuration (Attempted)

```
apps/extension/wxt.config.ts
```
- WXT framework config

apps/extension/entrypoints/background.ts

- TypeScript background

```
apps/extension/entrypoints/content.ts
```
- TypeScript content script

Technical Decisions

Fallback to Vanilla JS: Due to npm dependency resolution issues on macOS, implemented initial MVP in vanilla JavaScript
YouTube Integration: Cannot modify YouTube's native context menu (security restriction), so implemented:
- Custom button in YouTube player controls
- Context menu on page (not video element)
- Extension toolbar button
- Keyboard shortcuts
Visual Feedback: Added gradient notifications with animations for better UX

Issues Encountered & Solutions

npm dependency issue: WXT/mlly/pathe version conflicts on macOS
- Solution: Created vanilla JS implementation as MVP
- TODO: Resolve npm workspace dependencies for TypeScript/React migration
YouTube Context Menu: Cannot override YouTube's video player menu
- Solution: Multiple activation methods (toolbar, keyboard, page context menu, player button)
Video Detection: YouTube uses dynamic content loading
- Solution: MutationObserver to detect video elements as they load

Architecture Decisions

Monorepo: Turbo-based for efficient builds across packages
Extension Framework: WXT chosen for modern WebExtension development
Service Architecture: Microservices with FastAPI gateway + WebSocket
Search: Elasticsearch with dense vectors and RRF hybrid search
Orchestration: LangGraph for fact-checking workflow
Compliance First: Platform-specific policies enforced at content script level

Platform Compliance Strategy

YouTube: Context menu only, no overlays, transcript-based analysis
CNN/Fox/Vimeo: Adjacent UI allowed, limited frame extraction (0.5 FPS)
Fair Use: Max 30-second segments, automatic attribution

Next Steps (Sprint 1: Browser Extension Core)

Complete WXT setup with dependencies
Implement policy engine (apps/extension/src/content/policy.ts)
Create video detector component
Build service worker with WebSocket client
Implement context menu manager
Set up message bus for content script ↔ service worker communication

Technical Notes

Directory structure follows best practices for TypeScript monorepo
Docker Compose includes GPU support for Whisper STT service
Elasticsearch configured for dense vector search with int8_hnsw indexing
Service mesh ready with Linkerd annotations placeholder

Blockers/Dependencies

npm install for WXT dependencies needs to complete
GPU availability for Whisper service in production
Elasticsearch cluster setup for production deployment

Next Steps (Sprint 1 Continuation)

Extension Enhancement
- Load
```
youtube-overlay.js
```
  in manifest for YouTube-specific features
- Add icon files (icon-16.png, icon-48.png, icon-128.png)
- Resolve npm workspace dependencies for TypeScript migration
- Implement WebSocket connection to backend services
Backend Services
- Deploy Docker Compose stack
- Implement FastAPI gateway service
- Set up WebSocket for real-time communication
- Configure Elasticsearch for fact storage
Policy Engine
- Implement platform-specific compliance rules
- Add transcript extraction for YouTube
- Create frame extraction for CNN/Fox/Vimeo (0.5 FPS limit)

Commands for Next Session

# Load extension in Chrome
# 1. Navigate to chrome://extensions/
# 2. Enable Developer mode
# 3. Click "Load unpacked"
# 4. Select /Users/seanm-github/Documents/ClaudeCodeProjects/Pufferfish/apps/extension

# Test on YouTube
# - Right-click on page (not video) for context menu
# - Click extension icon in toolbar
# - Use Cmd+Shift+F (Mac) or Ctrl+Shift+F (Windows/Linux)

# Start backend services
cd /Users/seanm-github/Documents/ClaudeCodeProjects/Pufferfish
make docker-up
make setup-elastic

# Fix npm dependencies (when ready)
rm -rf node_modules package-lock.json apps/extension/node_modules
npm cache clean --force
npm install --legacy-peer-deps

Repository State

Working Chrome extension MVP (vanilla JavaScript)
Extension successfully detects videos on YouTube
Multiple activation methods implemented
Ready for backend service integration
No commits yet (ready for initial commit)

Testing Notes

Extension confirmed working on YouTube
Video detection successful ("Video detected: embedded video")
Context menu appears when right-clicking on page (not video element)
Visual notifications display correctly
YouTube player button integration ready (needs manifest update to load youtube-overlay.js)

Pufferfish Project Memory

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