v2.4.0

What's New in v2.4.0

New Features

Multi-Session Browser Support (#75)

• SessionManager for concurrent Strudel sessions with browser context isolation
• Max 5 concurrent sessions with 30-minute auto-cleanup timeout
• New MCP tools: create_session, destroy_session, list_sessions, switch_session
• Optional session_id parameter on existing tools for session targeting

MIDI Export (#74)

• MIDIExportService for exporting Strudel patterns to standard MIDI files
• export_midi tool with note name to MIDI number conversion
• Chord expansion support (major, minor, 7th, maj7, m7, dim, aug, etc.)

Audio Capture (#71, #72)

• AudioCaptureService with MediaRecorder integration
• New MCP tools: start_audio_capture, stop_audio_capture, capture_audio_sample

AI-Powered Pattern Feedback (#67, #73, #76)

• GeminiService for AI-powered music analysis via Google Gemini
• get_pattern_feedback MCP tool with Gemini integration
• get_feedback option added to compose workflow
• Application Default Credentials (ADC) support for Google Cloud auth
• Gemini CLI credential auto-detection from config files

Creative Tools

• refine - Iteratively improve patterns with specific instructions
• set_energy - Adjust pattern energy level (0-100)
• jam_with - Collaborate with AI to evolve patterns
• shift_mood - Transform pattern emotional character

New Music Genres (#52)

• intelligent_dnb - Intelligent drum and bass patterns
• trip_hop - Trip hop style patterns (Portishead, Massive Attack style)
• boom_bap - Classic boom bap hip hop patterns (DJ Premier style)

Fixed

• Gemini CLI credential paths now check correct locations
• PerformanceMonitor falsy check bugs
• CodeMirror timing race condition (#54)
• StrudelController now uses window.strudelMirror API (strudel.cc compatibility fix)

Security

• Removed executeInStrudelContext() - eliminated Function constructor injection vulnerability (#56)

Documentation

• Updated all tool counts from 52 to 66
• Updated test counts from 704 to 1521
• Updated coverage from 69% to 78%
• Fixed file structure documentation to match actual codebase
• Updated CodeMirror API references to use strudelMirror

Tests

• StrudelController coverage improved to 81.67% (#70)
• Comprehensive PatternValidator tests (#69)
• AudioAnalyzer algorithm validation tests
• ErrorRecovery comprehensive test suite
• Gemini integration and E2E tests
• 46 new tests for session management

Dependencies

• Bumped hono (security update) (#55)
• Bumped @modelcontextprotocol/sdk (#53)
• Bumped qs (security update) (#51)
• Added @tonejs/midi for MIDI export
• Added google-auth-library for ADC support

Full Changelog: v2.3.0...v2.4.0