SpecLinter MCP

[!IMPORTANT] Project Status: No Longer Supported

SpecLinter MCP is no longer being actively supported, maintained, or developed. This repository remains available as-is for anyone who finds it useful, but issues, pull requests, and feature requests should not be considered actively monitored.

Thank you to everyone who tried SpecLinter, shared feedback, opened issues, or used it in a workflow. Your interest and encouragement are sincerely appreciated.

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    🔍 AI-Powered Specification Analysis  •  📊 Quality Grading  •  ⚡ Task Generation

SpecLinter MCP

🚀 Turn vague specs into structured tasks with AI-powered quality gates

Transform natural language specifications into actionable development tasks with built-in quality assessment, similarity detection, and implementation validation.

✨ What Makes SpecLinter Special

🎯 Quick Start (5 Minutes)

� Installation & Setup

git clone https://github.com/orangebread/speclinter-mcp.git
cd speclinter-mcp
pnpm install && pnpm build

🔌 MCP Configuration

Add this to your AI IDE's MCP configuration:

{
  "mcpServers": {
    "speclinter": {
      "command": "node",
      "args": ["/absolute/path/to/dist/cli.js", "serve"]
    }
  }
}

� Try It Out

Ask your AI: "Initialize SpecLinter and parse this spec: Create a user login form with email validation"

📋 Table of Contents

• Core Workflows • Setup Guide • Quality System • Advanced Features

🎯 Core Workflows

Scenario: Developer Gets Quality Feedback on Vague Spec

Given I have a vague specification: "Add social features"
When I ask SpecLinter to parse it
Then I get grade F with specific improvement suggestions
And actionable feedback like "Define specific social features"
And a template showing how to improve to grade A

Scenario: Developer Generates Structured Tasks

Given I have a detailed spec: "Create user authentication with email verification, password reset, and 2FA"
When SpecLinter analyzes it
Then I get grade A with 8-12 structured tasks
And each task has acceptance criteria and Gherkin scenarios
And tasks are saved in organized directories

Scenario: Developer Validates Implementation

Given I've implemented my authentication feature
When I ask SpecLinter to validate it
Then AI scans my codebase for related files
And compares implementation against original spec
And provides quality score with specific recommendations

Scenario: Team Avoids Duplicate Work

Given my teammate built user profile management
When I try to add "user settings page"
Then SpecLinter detects 85% similarity
And recommends extending existing feature
And prevents duplicate implementation

🚀 Setup Guide

Prerequisites

• Node.js 18+ • pnpm (recommended)

Installation

pnpm install && pnpm build

MCP Integration

Add this configuration:

{
  "mcpServers": {
    "speclinter": {
      "command": "node",
      "args": ["/absolute/path/to/dist/cli.js", "serve"]
    }
  }
}

✅ Verify Setup

# Test server starts
node dist/cli.js serve

# Or run full validation plus MCP startup probe
./start.sh --check

# In your AI IDE, try:
"Initialize SpecLinter in my project"
"Parse this spec: Create a user login form"

📖 GitMCP Integration

For documentation access and examples, you can also add GitMCP integration:

{
  "mcpServers": {
    "speclinter-docs": {
      "command": "npx",
      "args": ["mcp-remote", "https://gitmcp.io/orangebread/speclinter-mcp"]
    }
  }
}

This provides AI access to SpecLinter documentation and usage examples.

🐳 Docker Alternative

Quick Docker Setup:

# Clone and build
git clone https://github.com/orangebread/speclinter-mcp.git
cd speclinter-mcp
docker build -t speclinter/mcp .

# Run SpecLinter server
docker run -d --name speclinter-server -v $(pwd):/workspace speclinter/mcp

MCP Configuration for Docker:

{
  "mcpServers": {
    "speclinter": {
      "command": "docker",
      "args": ["exec", "-i", "speclinter-server", "node", "/app/dist/cli.js", "serve"]
    }
  }
}

Benefits:

• ✅ No Node.js installation required
• ✅ Isolated environment
• ✅ Consistent across all platforms
• ✅ Easy cleanup with docker rm -f speclinter-server

📊 Quality System

SpecLinter grades your specifications and provides actionable feedback:

Quality Criteria Checklist

• ✅ Clear acceptance criteria - What defines "done"?
• ✅ Specific requirements - Avoid vague terms like "user-friendly"
• ✅ Error handling - What happens when things go wrong?
• ✅ Sufficient detail - Enough info for implementation
• ✅ User story format - "As a... I want... So that..." (optional)

Example: F → A Transformation

❌ Grade F Spec:

"Add social features to the app"

✅ Grade A Spec:

As a user, I want to send direct messages to other users so that I can communicate privately.

Acceptance Criteria:
- Users can search for other users by username
- Messages are delivered in real-time using WebSocket
- Message history is preserved and searchable
- Users can block/unblock other users
- All messages are encrypted end-to-end

Error Handling:
- Show "User not found" for invalid usernames
- Display "Message failed to send" with retry option
- Handle offline users with message queuing

🔧 Advanced Features

🧪 AI-Powered Gherkin Scenarios

Every task gets comprehensive, actionable test scenarios with enhanced AI generation:

Feature: User Authentication System
  Implement secure user login and registration with email verification

  Scenario: Successfully authenticate user with valid credentials
    Given the user registration system is available
    And a user exists with email "[email protected]" and password "SecurePass123"
    When I submit login form with valid credentials
    Then the user should be authenticated successfully
    And a JWT token should be generated and returned
    And the user should be redirected to the dashboard
    And the login attempt should be logged

  Scenario: Handle invalid login attempts
    Given a user exists with email "[email protected]"
    When I submit login form with email "[email protected]" and password "WrongPassword"
    Then the authentication should be rejected
    And an error message "Invalid credentials" should be displayed
    And no JWT token should be generated
    And the failed attempt should be logged

  Scenario: Validate input format during login
    Given the login system is ready to accept input
    When I provide malformed email "invalid-email" and password "test123"
    Then input validation should be triggered
    And specific validation errors should be shown
    And the user should understand what needs to be corrected

🎯 Enhanced Scenario Features:

• AI-Generated Quality: Scenarios tailored to your project's tech stack and patterns
• Multiple Types: Happy path, error handling, edge cases, security, and performance scenarios
• Specific Data: Concrete examples instead of generic placeholders
• Actionable Steps: Each step can be implemented as an automated test
• Business Focus: User-centric language with technical accuracy
• Comprehensive Coverage: All acceptance criteria addressed
• Configurable Complexity: Adjust scenario depth and coverage via configuration

🔍 Semantic Similarity Detection

Prevents duplicate work by finding similar features:

Input: "user profile management"
Found: "user settings page" (85% similarity)
Recommendation: Extend existing feature

🤖 AI Implementation Validation

Advanced AI-powered validation that understands your code:

• Intelligent Codebase Scanning - Finds implementation files using semantic analysis
• Context-Aware Analysis - Understands your project's patterns and tech stack
• Quality Assessment - Provides detailed scoring with specific recommendations
• Acceptance Criteria Validation - Checks each requirement against actual implementation
• Auto-Status Updates - Updates task statuses based on implementation findings
• Architectural Review - Ensures consistency with project patterns and standards

📁 Project Structure

your-project/
├── .speclinter/
│   ├── config.json         # Settings
│   └── context/            # AI-generated project docs
└── speclinter-tasks/
    └── [feature-name]/
        ├── _active.md      # Status dashboard
        ├── task_*.md       # Individual tasks
        └── gherkin/        # Test scenarios

💬 How to Use SpecLinter

Just talk to your AI assistant naturally! Here are the most common commands:

🚀 Getting Started

"Initialize SpecLinter in my project"
"Analyze my codebase to understand patterns and tech stack"

📝 Working with Specs

"Parse this spec: Create a user authentication system with email verification"
"Grade this specification: [your spec here]"
"Find similar features to: user profile management"
"Generate comprehensive Gherkin scenarios for my authentication feature"

📊 Managing Tasks

"Show me the status of my authentication tasks"
"Mark the database setup task as completed"
"Validate the implementation of my login feature"
"Update task status for WebSocket connection to completed"

💡 Pro Tip: SpecLinter works through your AI IDE - no CLI commands needed for daily use!

🏗️ Real-World Examples

Example 1: E-commerce Product Catalog

Input Spec:

Create a product catalog page with filtering and search

SpecLinter Output:

• Grade: C (needs more detail)
• Generated Tasks: 6 structured tasks
• Improvements: Add specific filter types, search behavior, pagination

Example 2: User Authentication System

Input Spec:

As a user, I want to log in with email and password so I can access my account.

Acceptance Criteria:
- Email validation with proper error messages
- Password must be 8+ characters
- Failed attempts are rate-limited (3 attempts/5 minutes)
- Successful login redirects to dashboard
- Remember me option for 30 days

SpecLinter Output:

• Grade: A (excellent specification)
• Generated Tasks: 12 detailed tasks including security, validation, and UX
• Gherkin Scenarios: Auto-generated for each task

🤝 Team Collaboration

Preventing Duplicate Work

Scenario: Team coordination
  Given developer A built "user profile management"
  When developer B wants to add "user settings page"
  Then SpecLinter detects 85% similarity
  And recommends extending existing feature
  And prevents duplicate implementation

Cross-Project Similarity

SpecLinter can detect similar features across multiple repositories and microservices, helping large teams avoid redundant work.

🔧 Development Reference

These commands are retained for historical reference for anyone exploring or forking the project.

git clone https://github.com/orangebread/speclinter-mcp.git
cd speclinter-mcp

# Traditional development
pnpm install && pnpm build

# Available scripts
pnpm build        # Build for production
pnpm test         # Run Vitest tests (implementation validation)
pnpm lint         # Lint code with ESLint
pnpm dev          # Watch mode for development
pnpm start        # Start MCP server

# Docker development
docker build -t speclinter/mcp:latest .
docker run -it --rm -v $(pwd):/workspace speclinter/mcp

🧪 Testing

SpecLinter uses Vitest for implementation validation rather than traditional unit tests. The test framework validates that features are implemented according to their specifications using AI-generated Gherkin scenarios.

🏗️ Architecture

• 🔒 Type Safety: Full TypeScript with Zod validation
• 🤖 AI-Leveraged: Two-step pattern for semantic analysis
• 💾 Database: SQLite for task management and feature history
• 🔌 MCP Integration: Full Model Context Protocol support

📄 License

MIT