# OpenSpeak Specifications

This directory contains comprehensive feature specifications for the OpenSpeak project - an open-source TeamSpeak alternative built in Go.

## Overview

These specifications define the architecture, design, and implementation details for all major components of OpenSpeak. They serve as reference documentation for development and ensure consistency across the project.

## Specification Files

### Core Features

1. **[001-audio-streaming.md](001-audio-streaming.md)** - AUDIO-001
   - Real-time voice packet capture, encoding, transmission, and playback
   - Opus codec configuration and quality settings
   - Client and server audio pipeline architecture
   - Jitter buffer management and error handling
   - Performance targets and latency requirements

2. **[002-authentication.md](002-authentication.md)** - AUTH-001
   - Authentication and authorization system
   - Phase 1: Admin token-based authentication
   - Phase 2: User accounts and password authentication (future)
   - Permission models and access control
   - Security requirements and token management

3. **[003-channel-management.md](003-channel-management.md)** - CHANNEL-001
   - Voice channel creation, management, and lifecycle
   - Public/private channels with permission-based access
   - Member management and capacity control
   - Channel events and state tracking
   - Soft delete (archive) and hard delete operations

4. **[004-user-presence.md](004-user-presence.md)** - PRESENCE-001
   - Online status and presence tracking
   - User session management
   - Idle detection and heartbeat handling
   - Mute status tracking (microphone and speaker)
   - Real-time presence event distribution

### Infrastructure & Implementation

5. **[005-client-application.md](005-client-application.md)** - CLIENT-001
   - Desktop GUI client application
   - UI layout and screen design
   - User interactions and workflows
   - Audio subsystem integration
   - Configuration and settings management
   - Error handling and connection recovery

6. **[006-server-core.md](006-server-core.md)** - SERVER-001
   - Server architecture and component design
   - Package structure and organization
   - Core managers: Auth, Channel, Presence, Voice
   - Concurrency model with goroutines and channels
   - Configuration management and logging
   - Graceful shutdown and error handling

7. **[007-protocol-definition.md](007-protocol-definition.md)** - PROTO-001
   - Protocol Buffers definitions
   - gRPC service specifications
   - Message types for all services
   - Backwards compatibility strategy
   - Message versioning and evolution
   - Proto compilation instructions

### Operations & Development

8. **[008-deployment.md](008-deployment.md)** - DEPLOY-001
   - Server deployment options (standalone, Docker, systemd)
   - Configuration management and environment variables
   - System requirements and resource planning
   - TLS and security configuration
   - Monitoring, logging, and health checks
   - Backup, recovery, and upgrade procedures

9. **[009-development-guidelines.md](009-development-guidelines.md)** - DEV-001
   - Development environment setup
   - Build, test, and quality assurance commands
   - Code style and naming conventions
   - Testing standards and coverage goals
   - Git workflow and commit conventions
   - Debugging techniques and performance optimization

## Quick Start

### For Developers
1. Start with [009-development-guidelines.md](009-development-guidelines.md) for setup
2. Review [006-server-core.md](006-server-core.md) for architecture
3. Consult [007-protocol-definition.md](007-protocol-definition.md) for proto definitions
4. Read feature specs for implementing specific components

### For DevOps
1. Review [008-deployment.md](008-deployment.md) for deployment options
2. Check [006-server-core.md](006-server-core.md) for configuration
3. Consult for operational procedures and monitoring

### For Understanding Features
1. [001-audio-streaming.md](001-audio-streaming.md) - How voice works
2. [002-authentication.md](002-authentication.md) - How access control works
3. [003-channel-management.md](003-channel-management.md) - How channels work
4. [004-user-presence.md](004-user-presence.md) - How presence tracking works
5. [005-client-application.md](005-client-application.md) - How the UI works

## Key Design Decisions

### Architecture
- **Client-Server Model:** Separate client and server applications
- **gRPC+Protobuf:** Efficient binary protocol with streaming support
- **Server Broadcast:** Server broadcasts voice packets to channel members (not P2P or SFU)
- **Modular by Feature:** Packages organized around domain concepts

### Technology
- **Language:** Go (server), Go with Fyne (client GUI)
- **Audio:** Opus codec for low-latency, high-quality voice
- **Concurrency:** Goroutines and channels for scalability
- **Storage:** In-memory (MVP), database support (future)

### Performance Targets
- **Voice Latency:** <100ms end-to-end
- **Audio Bitrate:** 64 kbps default (8-128 kbps range)
- **Jitter Buffer:** 50ms (configurable 20-100ms)
- **Server Capacity:** 100+ concurrent users per server (scalable)

## Specification Conventions

### Status Levels
- **Planned:** Feature specification complete, implementation scheduled
- **In Progress:** Implementation started
- **Complete:** Implementation done, tested, and deployed

### Priority Levels
- **Critical:** Must have for MVP, foundation for other features
- **High:** Important for initial release
- **Medium:** Nice to have for v1.0
- **Low:** Future enhancement

### Phase Strategy
- **Phase 1 (MVP):** Core voice communication with admin tokens
- **Phase 2:** User accounts and persistent data
- **Phase 3+:** Advanced features (video, screen share, etc)

## Updating Specifications

When modifying specifications:
1. Update the version number and status
2. Add a changelog entry at the bottom
3. Maintain backwards compatibility notes
4. Update related specifications if needed
5. Verify implementation matches specification

## Questions?

Refer to the specific specification file for detailed information, or consult the [project.md](../project.md) file for project-level context and conventions.
