🤖 Copilot Session Viewer

Multi-Tool Session Log Viewer & Analyzer
View and analyze AI coding assistant sessions from GitHub Copilot CLI, Copilot Chat (VSCode), Claude Code CLI, and Pi-Mono with time analysis, virtual scrolling, and AI-powered insights.

A modern web-based viewer for analyzing AI coding assistant session logs with virtual scrolling, infinite loading, time analysis, and AI-powered insights. Supports GitHub Copilot CLI, Copilot Chat (VSCode), Claude Code CLI, and Pi-Mono sessions.

Session List

Session Detail — Event Stream with Virtual Scrolling

Time Analysis — Gantt Timeline & Sub-Agent Breakdown

⚡ Quick Start

Try without installing (recommended)

npx -y @qiaolei81/copilot-session-viewer@latest

Then open http://localhost:3838

Install globally

npm install -g @qiaolei81/copilot-session-viewer
copilot-session-viewer

Requirements

Node.js ≥ 18.0.0
At least one AI coding assistant (optional for generating sessions):
- GitHub Copilot CLI (recommended)
- Claude Code CLI
- Pi-Mono

✨ Features

🎯 Core Capabilities

📊 Session Management - View, export, and import session archives
🔍 Event Analysis - Real-time log parsing with filtering and search
⏱️ Time Analysis - Execution timelines and performance metrics
🚀 Virtual Scrolling - Handle 1000+ events smoothly
♾️ Infinite Scroll - Progressive session loading for better performance
🤖 AI Insights - LLM-powered session analysis
🎭 Multi-Format Support - Copilot CLI, Copilot Chat (VSCode), Claude Code, and Pi-Mono sessions

🎨 User Experience

🌙 Dark Theme - GitHub-inspired interface
📱 Responsive - Works on desktop, tablet, and mobile
⚡ Fast - Optimized virtual rendering and lazy loading
🔐 Secure - Local-first with no data sharing, XSS protection, ZIP bomb defense

🛠️ Technical Features

Vue 3 - Reactive virtual scrolling
Express.js - Robust backend API
ZIP Import/Export - Session sharing capabilities with security validation
Multi-Source Support - Copilot CLI (~/.copilot/session-state/), Copilot Chat (auto-detected per OS), Claude (~/.claude/projects/), Pi-Mono (~/.pi/agent/sessions/)
Unified Event Format - Consistent schema across all sources
Memory Pagination - Efficient handling of large sessions
XSS Protection - DOMPurify-based HTML sanitization
ZIP Bomb Defense - 4-layer protection (compressed size, uncompressed size, file count, depth)

🚀 How It Works

Generate Sessions - Use GitHub Copilot CLI, Claude Code CLI, or Pi-Mono to create session logs
Auto-Discovery - Sessions are automatically detected from:
- Copilot CLI: ~/.copilot/session-state/
- Copilot Chat: auto-detected — ~/Library/Application Support/Code/User/workspaceStorage/ (macOS), ~/.config/Code/User/workspaceStorage/ (Linux), %APPDATA%\Code\User\workspaceStorage\ (Windows)
- Claude: ~/.claude/projects/
- Pi-Mono: ~/.pi/agent/sessions/
Browse & Analyze - View sessions with infinite scroll and detailed event streams
Time Analysis - Analyze turn durations, tool usage, and sub-agent performance
AI Insights - Generate comprehensive session analysis with Copilot

# Example: Generate sessions with different tools

# GitHub Copilot CLI
copilot --model claude-sonnet-4.5 -p "Help me refactor this code"

# Claude Code CLI
claude -p "Implement user authentication"

# Pi-Mono CLI
pi -p "Create a REST API endpoint"

# Start the viewer
npx @qiaolei81/copilot-session-viewer

# Browse all sessions at http://localhost:3838

📚 Documentation

Installation Guide - Detailed setup instructions
API Documentation - REST endpoints and responses
Development Guide - Contributing and local development
Troubleshooting - Common issues and solutions
Changelog - Release history

🧪 Testing & Quality

This project includes comprehensive unit and E2E test coverage with CI/CD integration.

Test Coverage

700+ Tests (622 unit + 80 E2E)
Unified Format Tests - Mock data validation for all sources (Copilot CLI, Copilot Chat, Claude, Pi-Mono)
Security Tests - XSS prevention, ZIP bomb defense
Integration Tests - Session import/export, file operations
CI-Friendly - Mock data generation for reproducible tests

Running Tests

# Unit tests only
npm test

# Unit tests with coverage
npm run test:coverage

# E2E tests only
npm run test:e2e

# Lint check
npm run lint:check

# Run all tests (unit + E2E)
npm run test:all

CI/CD Pipeline

GitHub Actions workflow includes:

Linting - ESLint code quality checks
Unit Tests - 622 Jest tests with coverage
Mock Data Generation - Reproducible test session fixtures
E2E Tests - 80 Playwright tests with Chromium
Artifact Upload - Test results on failure

Test Data Strategy:

✅ CI uses generated mock data (fast, reliable, no external dependencies)
✅ Local development can use real sessions for integration testing
✅ Fixtures cover all event formats (Copilot CLI, Copilot Chat, Claude, Pi-Mono)

🏗️ Architecture

┌─────────────────────────────────────────────────┐
│  Frontend (Vue 3 + EJS Templates)               │
│  • Virtual Scroller (vue-virtual-scroller)      │
│  • Infinite Scroll (JavaScript)                 │
│  • GitHub-inspired Dark Theme                   │
│  • XSS Protection (DOMPurify)                   │
└─────────────────────────────────────────────────┘
                      ↕ HTTP/API
┌─────────────────────────────────────────────────┐
│  Backend (Node.js + Express)                    │
│  • Multi-Source Session Repository              │
│  • Unified Event Format Normalizer              │
│  • JSONL Streaming Parser                       │
│  • Paginated API Endpoints                      │
│  • ZIP Import/Export with Security Validation   │
└─────────────────────────────────────────────────┘
                      ↕ File System
┌─────────────────────────────────────────────────┐
│  Data Layer (Multi-Source)                      │
│  • Copilot CLI: ~/.copilot/session-state/        │
│  • Copilot Chat: <OS-specific>/workspaceStorage/ │
│  • Claude:  ~/.claude/projects/                  │
│  • Pi-Mono: ~/.pi/agent/sessions/                │
└─────────────────────────────────────────────────┘

Unified Event Format

All session sources are normalized to a consistent schema:

{
  type: 'assistant.message',
  timestamp: '2026-02-23T00:00:00.000Z',
  data: {
    message: 'Response text',
    tools: [
      {
        id: 'tool-001',
        name: 'read',
        startTime: '2026-02-23T00:00:01.000Z',
        endTime: '2026-02-23T00:00:02.000Z',
        status: 'completed',
        input: { path: 'file.js' },
        result: { content: '...' },
        error: null,
        metadata: {
          source: 'copilot',  // or 'claude', 'pi-mono'
          duration: 1000
        }
      }
    ]
  }
}

Benefits:

✅ Consistent UI rendering across all sources
✅ Simplified frontend logic
✅ Easy to add new sources

🔒 Security

XSS Protection

DOMPurify Sanitization - All user-generated content is sanitized before rendering
Whitelist-based - Only safe HTML tags and attributes are allowed
JavaScript URL Protection - Blocks javascript:, data:, and onclick handlers
Tested - Comprehensive E2E tests for XSS attack vectors

ZIP Bomb Defense

4-layer protection against malicious archives:

Compressed Size Limit - 50 MB max upload
Uncompressed Size Limit - 200 MB max expansion
File Count Limit - 1000 files max
Directory Depth Limit - 5 levels max

Local-First Design

No external API calls for session data
All processing happens locally
Optional AI insights require user action
No telemetry or tracking

🎯 Use Cases

For Developers

Debug GitHub Copilot CLI sessions
Analyze conversation patterns and tool usage
Export sessions for team collaboration
Performance optimization insights

For Teams

Share interesting Copilot sessions
Analyze team AI usage patterns
Document complex problem-solving sessions
Training and best practice development

For Researchers

Study human-AI interaction patterns
Analyze tool usage effectiveness
Session data mining and analysis
AI conversation flow research

🤝 Contributing

This project welcomes contributions! See our Development Guide for:

Setting up the development environment
Code style guidelines
Testing procedures
Contribution workflow

📄 License

MIT License - see LICENSE file for details

🙏 Acknowledgments

Built with AI assistance - This project was developed using GitHub Copilot and Claude AI for code generation, documentation, and architectural decisions.

Key Dependencies:

Vue 3 - Reactive frontend framework
vue-virtual-scroller - High-performance virtual scrolling
Express.js - Web application framework
EJS - Templating engine
DOMPurify - XSS protection
Playwright - E2E testing

Recent Updates (v0.3.0):

✨ VSCode Copilot Chat support (4th source)
🏷️ Session tagging system
🔄 Multi-tool branding (Copilot CLI, Copilot Chat, Claude Code, Pi-Mono)
🔒 XSS protection with DOMPurify
🛡️ ZIP bomb defense (4-layer validation)
🧪 700+ tests with CI/CD integration
📚 Comprehensive documentation

🏠 Homepage • 📖 Docs • 🐛 Issues • 💬 Discussions

Made with ❤️ for the GitHub Copilot CLI community

Name		Name	Last commit message	Last commit date
Latest commit History 419 Commits
.github		.github
__tests__		__tests__
bin		bin
docs		docs
examples		examples
lib/parsers		lib/parsers
public/vendor		public/vendor
scripts		scripts
src		src
views		views
.env.example		.env.example
.gitignore		.gitignore
.npmignore		.npmignore
.nycrc		.nycrc
AGENTS.md		AGENTS.md
CHANGELOG.md		CHANGELOG.md
CONTRIBUTING.md		CONTRIBUTING.md
LICENSE		LICENSE
README.md		README.md
RELEASE.md		RELEASE.md
eslint.config.mjs		eslint.config.mjs
jest.config.js		jest.config.js
package-lock.json		package-lock.json
package.json		package.json
playwright.config.js		playwright.config.js
server.js		server.js

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🤖 Copilot Session Viewer

Session List

Session Detail — Event Stream with Virtual Scrolling

Time Analysis — Gantt Timeline & Sub-Agent Breakdown

⚡ Quick Start

Try without installing (recommended)

Install globally

Requirements

✨ Features

🎯 Core Capabilities

🎨 User Experience

🛠️ Technical Features

🚀 How It Works

📚 Documentation

🧪 Testing & Quality

Test Coverage

Running Tests

CI/CD Pipeline

🏗️ Architecture

Unified Event Format

🔒 Security

XSS Protection

ZIP Bomb Defense

Local-First Design

🎯 Use Cases

For Developers

For Teams

For Researchers

🤝 Contributing

📄 License

🙏 Acknowledgments

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