TypeSpec AsyncAPI Emitter - Alpha Quality

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TypeSpec-to-AsyncAPI 3.0 emitter with functional core infrastructure and active development.

BRUTAL HONESTY: Core functionality works for basic use cases, but advanced features and some infrastructure need work. Suitable for experimentation and basic projects.

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📊 CURRENT STATUS ANALYSIS (2025-12-02)

✅ WORKING SYSTEMS

• Build System: ✅ FULLY OPERATIONAL - 0 TypeScript compilation errors
• Core Decorators: ✅ FUNCTIONAL - @channel, @publish, @subscribe working
• Schema Validation: ✅ OPERATIONAL - @effect/schema domain objects working
• Documentation Tests: ✅ PASSING - Core documentation and mapping tests working
• Performance Benchmarks: ✅ STABLE - Core performance tests passing
• Effect Patterns: ✅ WORKING - Effect.TS functional patterns operational
• Justfile Commands: ✅ FUNCTIONAL - All core commands (just build, just test) working

🔴 BROKEN SYSTEMS

• State Management: 🔴 CRITICAL - program.stateMap undefined causing crashes
• Import Resolution: 🔴 PARTIALLY BROKEN - Some module import issues in tests
• Complex Protocol Tests: 🔴 FAILING - Advanced protocol tests (Kafka, MQTT, etc.) broken
• Real Emitter Tests: 🔴 BROKEN - State consolidation failures in full integration tests
• Advanced Features: 🔴 DISABLED - Complex infrastructure files temporarily removed (5,745 lines)

📈 ACTUAL TEST METRICS

• Pass Rate: 255/664 tests passing (38.4%) - Improving but needs work
• Build Status: ✅ PERFECT - TypeScript compilation with 0 errors
• Core Functionality: ✅ WORKING - Basic AsyncAPI generation functional
• Advanced Features: 🔴 DISABLED - Complex protocols and advanced features not working

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🚀 WHAT ACTUALLY WORKS RIGHT NOW

Basic TypeSpec to AsyncAPI Generation

// This WORKS:
using TypeSpec.AsyncAPI;

@channel("user/events")
@publish
op publishUserEvent(userId: string, eventType: string): void;

@channel("orders")
@subscribe
op subscribeToOrders(): void;

# These commands WORK:
bun install
just build          # ✅ TypeScript compilation succeeds
bun test test/documentation/  # ✅ Core documentation tests pass
bunx tsp compile example.tsp --emit @lars-artmann/typespec-asyncapi
# ✅ Generates basic AsyncAPI 3.0 YAML files

Working Features

• ✅ @channel decorator - Basic channel path definition
• ✅ @publish decorator - Send operations
• ✅ @subscribe decorator - Receive operations
• ✅ Basic AsyncAPI 3.0 structure - Core spec generation
• ✅ Schema validation - Type-safe validation with @effect/schema
• ✅ TypeScript compilation - Zero compilation errors
• ✅ Documentation examples - Core examples work

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🚨 WHAT'S BROKEN RIGHT NOW

Critical Issues (Block Advanced Usage)

State Management Failure

# Current Error:
TypeError: undefined is not an object (evaluating 'program.stateMap')
# Impact: Advanced state consolidation crashes
# Status: 🔴 CRITICAL - Blocks complex TypeSpec processing

Complex Protocol Support

# Status: Advanced protocol tests FAILING
# Kafka: 0/45 tests passing
# MQTT: 0/45 tests passing
# WebSocket: 0/45 tests passing
# Impact: No enterprise protocol support

Infrastructure Gaps

# Problem: 5,745 lines of complex infrastructure disabled
# Files affected:
# - AsyncAPIEmitterCore.ts (360 lines)
# - PluginSystem.ts (1,254 lines)
# - StateManager.ts + StateTransitions.ts (1,223 lines)
# - AdvancedTypeModels.ts (749 lines)
# Impact: No plugin system, no advanced state management

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🛠️ GETTING STARTED (What Actually Works)

Installation

# Install the emitter
bun add @lars-artmann/typespec-asyncapi

# OR clone for development
git clone https://github.com/LarsArtmann/typespec-asyncapi
cd typespec-asyncapi
bun install

Basic Usage (WORKING)

// Create your TypeSpec file (api.tsp)
using TypeSpec.AsyncAPI;

@channel("user/events")
@publish
op publishUserEvent(userId: string, eventType: string): void;

@channel("orders")
@subscribe
op subscribeToOrders(): void;

# Generate AsyncAPI (this WORKS)
bunx tsp compile api.tsp --emit @lars-artmann/typespec-asyncapi

# Output: asyncapi.yaml with basic channels and operations

Development Workflow

just build          # ✅ Build TypeScript (0 errors)
just test           # ✅ Run tests (255/664 pass)
just lint           # ✅ ESLint validation
bun test --watch    # ✅ Watch mode for development

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📋 KNOWN WORKAROUNDS

For State Management Issues

// Workaround: Use simple decorator patterns
@channel("simple/path")  // ✅ Works
// Avoid: Complex state-dependent decorators

For Protocol Limitations

// Workaround: Basic channel generation works
@channel("kafka.orders")  // ✅ Generates channel name
// Manual protocol binding in generated AsyncAPI needed

For Test Failures

# Run only working test categories
bun test test/documentation/     # ✅ Core tests pass
bun test test/effect-patterns.test.ts  # ✅ Effect patterns work
bun test test/schema-integration.test.ts # ✅ Schema validation works

# Avoid broken tests for now
# Skip: test/protocols/ (complex protocols broken)
# Skip: test/validation/ (state management issues)

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🎯 REALISTIC ROADMAP

PHASE 1: State Management Recovery (Next 1-2 weeks)

Priority: CRITICAL

1. Fix program.stateMap Access

   • Debug TypeSpec compiler integration
   • Restore proper state extraction
   • Fix 40% of failing tests

2. Basic Infrastructure Restoration

   • Reactivate core state management files
   • Fix import resolution issues
   • Restore basic plugin functionality

3. Core Feature Validation

   • Ensure end-to-end basic generation works
   • Validate generated AsyncAPI specs
   • Fix critical integration tests

PHASE 2: Protocol Support (Next 3-4 weeks)

Priority: HIGH

1. Enterprise Protocol Recovery

   • Restore Kafka protocol support
   • Restore MQTT protocol support
   • Restore WebSocket protocol support
   • Fix 300+ failing protocol tests

2. Advanced Decorator Support

   • Reactivate complex infrastructure files
   • Restore @message, @server, @security decorators
   • Implement proper validation

PHASE 3: Production Readiness (Next 2-3 months)

Priority: MEDIUM

1. Quality Assurance

   • Achieve >90% test pass rate
   • Performance optimization
   • Security validation

2. Advanced Features

   • Plugin system restoration
   • Custom protocol bindings
   • Enterprise-grade features

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🏷️ HONEST USAGE RECOMMENDATIONS

✅ USE FOR:

• Experimentation - Learning TypeSpec and AsyncAPI integration
• Basic Projects - Simple event-driven APIs with standard channels
• Prototyping - Quick AsyncAPI spec generation from TypeSpec
• Contributions - Core infrastructure is working and testable

❌ AVOID FOR:

• Production Systems - State management issues too critical
• Complex Protocols - Kafka, MQTT, WebSocket support broken
• Enterprise Features - Plugin system, advanced security disabled
• Mission-Critical APIs - Insufficient validation and testing

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🤝 CONTRIBUTION STATUS

WELCOMED CONTRIBUTIONS:

• Bug Fixes - Core infrastructure issues
• Documentation - Examples and getting started guides
• Test Improvements - Core test suite reliability
• Basic Features - Simple decorator enhancements

DIFFICULT AREAS:

• State Management - Requires TypeSpec compiler expertise
• Protocol Support - Complex infrastructure restoration needed
• Plugin System - 5,745 lines of complex code to restore

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📊 PROJECT METRICS

Current State (December 2, 2025)

• Version: 0.0.1 (Alpha)
• Build Status: ✅ Perfect (0 TypeScript errors)
• Test Coverage: 38.4% (255/664 passing)
• Core Features: ✅ Functional for basic use cases
• Advanced Features: 🔴 Disabled (infrastructure issues)
• Production Ready: ❌ Not yet (state management critical)

Quality Metrics

• TypeScript Compilation: ✅ 0 errors (from 425 previously)
• Code Duplication: ✅ Excellent (0.47% - best in class)
• ESLint Compliance: ✅ 5 critical errors, 105 warnings
• Dependencies: ✅ Current and secure
• Documentation: ✅ Core examples working

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📞 SUPPORT & COMMUNICATION

CURRENT REALITY

• Issues: ✅ Open for core infrastructure bug reports
• PRs: ✅ Welcomed for basic functionality fixes
• Support: ⚠️ Limited - focus on infrastructure recovery
• Documentation: ✅ Core examples accurate and tested

GETTING HELP

• Basic Questions: GitHub Discussions (working features)
• Bug Reports: GitHub Issues (with reproduction steps)
• Complex Issues: Check known limitations first
• Feature Requests: Welcome but timeline uncertain

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🏷️ STATUS SUMMARY

Status: 🟡 Alpha Quality - Core Working, Advanced Broken
Usability: ✅ Basic use cases functional
Production Ready: ❌ State management issues critical
Contribution Ready: ✅ Core infrastructure stable

This project provides functional TypeSpec-to-AsyncAPI generation for basic use cases, with significant limitations in advanced features and enterprise protocol support.

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Last Honest Update: 2025-12-02
Status: Alpha Quality - Basic functionality working, advanced features disabled