DevPlan MCP Server

Transform ideas into executable development plans — an MCP server that brings the ClaudeCode-DevPlanBuilder methodology to Claude Code.

The Problem: AI coding assistants often lose context, skip steps, or produce inconsistent code across sessions.

The Solution: DevPlan creates detailed, Haiku-executable development plans with built-in validation, lessons learned, and issue remediation workflows.

Key Features

Feature	Description
Haiku-Executable Plans	Plans so detailed that Claude Haiku can execute them mechanically
Built-in Validation	Validates plans are complete before execution begins
Real-Time Progress Tracking	Integrates with Claude Code's Task tools for live visibility
Lessons Learned	Captures issues from verification and injects them into future plans
Issue Remediation	Converts GitHub issues directly into remediation tasks
Executor & Verifier Agents	Auto-generates specialized agents with task tracking built-in

Install

claude mcp add devplan --transport sse https://mcp.devplanmcp.store/sse --scope user

Or add to ~/.claude.json under the mcpServers key:

{
  "mcpServers": {
    "devplan": {
      "type": "sse",
      "url": "https://mcp.devplanmcp.store/sse"
    }
  }
}

Update Existing Installation

If you already have DevPlan installed, remove from both scopes and re-add:

claude mcp remove devplan --scope project; claude mcp remove devplan --scope user; claude mcp add devplan --transport sse https://mcp.devplanmcp.store/sse --scope user

Quick Start

You: "Use devplan_start to help me build a CLI tool for managing dotfiles"

That's it. DevPlan will guide Claude through the entire process.

The DevPlan Workflow

DevPlan uses a scaffold → enhance → validate workflow that ensures every plan is Haiku-executable before implementation begins.

flowchart LR
    subgraph Planning["📋 Planning"]
        A[Interview] --> B[Brief]
        B --> C[Generate Scaffold]
    end

    subgraph Enhancement["✨ Enhancement"]
        C --> D[Enhance with Code]
        D --> E{Validate}
        E -->|Fail| D
        E -->|Pass| F[Ready]
    end

    subgraph Execution["⚡ Execution"]
        F --> G[Haiku Executes]
        G --> H[Sonnet Verifies]
    end

    subgraph Learning["🧠 Learning"]
        H -->|issues| I[Capture Lessons]
        I -->|improve| C
    end

    style E fill:#fff3e0,stroke:#f57c00
    style F fill:#c8e6c9,stroke:#2e7d32
    style I fill:#e3f2fd,stroke:#1565c0

How It Works

1. Interview → DevPlan asks questions to understand your project
2. Brief → Creates a structured PROJECT_BRIEF.md with requirements
3. Generate Scaffold → devplan_generate_plan creates a starting template
4. Enhance with Code → Claude (Opus/Sonnet) fills in complete, copy-pasteable code
5. Validate → devplan_validate_plan checks the plan is Haiku-executable
6. Execute → Haiku implements each subtask mechanically
7. Verify → Sonnet tries to break the implementation
8. Learn → Issues become lessons for future projects

Validation Ensures Quality

The validation step checks that plans are truly Haiku-executable:

• ✅ Complete code blocks (not pseudocode or placeholders)
• ✅ All imports included in code blocks
• ✅ No "add to existing" instructions
• ✅ No cross-subtask references
• ✅ Verification commands with expected outputs

# Example validation output
{
  "valid": true,
  "errors": [],
  "warnings": [],
  "stats": {
    "subtasks": 5,
    "codeBlocksChecked": 8,
    "issuesFound": 0
  }
}

Real-Time Progress with Task Tools

Generated executor and verifier agents integrate with Claude Code's Task tools for live progress visibility:

• Executor agents create tasks for each subtask, showing real-time spinners as work progresses
• Verifier agents create tasks for each verification phase (Smoke Tests, Feature Verification, Edge Cases, etc.)
• Progress is visible without scrolling — you always know what Claude is working on

# Example: Executor tracks subtasks
TaskCreate({ subject: "1.2.3: Implement auth middleware", activeForm: "Implementing auth middleware" })
TaskUpdate({ taskId: "...", status: "in_progress" })
# ... work happens ...
TaskUpdate({ taskId: "...", status: "completed" })

Both Task tools (real-time visibility) and DEVELOPMENT_PLAN.md (durable record) are updated — giving you the best of both worlds.

Usage Examples

New Project

"Use devplan_start to help me build [your idea]"

Fix a GitHub Issue

# Get issue JSON
gh issue view 123 --json number,title,body,labels,comments,url > issue.json

# Then tell Claude:
"Use devplan_issue_to_task with this issue to create a remediation plan"

Check Progress

"Use devplan_progress_summary to show me where we are"

Multi-Model Support

DevPlan generates plans and agent files for multiple AI coding tools and models. Use the target parameter to generate outputs for your preferred tool.

Supported Targets

Target	Tool	Agent File	Best For
claude	Claude Code	CLAUDE.md	Claude Code IDE (default)
cursor	Cursor IDE	.cursorrules	Cursor AI editor
aider	Aider CLI	.aider.conf.yml	Terminal-based AI pair programming
cline	VS Code Cline	.cline/instructions.md	VS Code extension
windsurf	Windsurf IDE	.windsurf/rules.md	Codium's AI IDE
generic	Any Model	AGENTS.md + files	Model-agnostic markdown format

Using Targets

When generating plans or agent files, specify the target tool:

Generate plan for Cursor:

"Use devplan_generate_plan to create a plan, then I'll customize it for Cursor. Set target to 'cursor' for .cursorrules format"

Generate executor for Aider:

"Use devplan_generate_executor with target='aider' to create an Aider-compatible executor agent"

Generate generic agent files:

"Use devplan_generate_claude_md with target='generic' to create model-agnostic AGENTS.md files"

How Targets Work

Each target has a dedicated adapter that transforms the DevPlan methodology into the appropriate format:

• Claude - Generates CLAUDE.md with executor/verifier agents in .claude/agents/
• Cursor - Generates .cursorrules with all guidance in one file (Cursor doesn't support separate agents)
• Aider - Generates .aider.conf.yml with architect mode instructions
• Cline - Generates .cline/instructions.md with executor/verifier split
• Windsurf - Generates .windsurf/rules.md with cascade-optimized format
• Generic - Generates AGENTS.md, EXECUTOR.md, and VERIFIER.md for any tool

Examples

Start a new project for Cursor:

"Use devplan_start to help me build a CLI tool, then generate the plan with target='cursor' for Cursor IDE"

Add executor for specific target:

"I have a development plan. Use devplan_generate_executor with target='aider' to create the executor agent for Aider"

Compare adapter capabilities: See docs/ADAPTERS.md for a detailed comparison of each target's capabilities and limitations.

Tools

Planning

Tool	Purpose
devplan_start	Main entry point - guides Claude through the methodology
devplan_interview_questions	Get questions to gather project requirements
devplan_create_brief	Generate PROJECT_BRIEF.md
devplan_parse_brief	Parse existing brief into structured data
devplan_list_templates	List project templates (cli, web_app, api, library)

Generation

Tool	Purpose
devplan_generate_plan	Generate DEVELOPMENT_PLAN.md scaffold with validation instructions
devplan_generate_claude_md	Generate CLAUDE.md scaffold
devplan_generate_executor	Generate Haiku-powered executor agent with Task tool integration
devplan_generate_verifier	Generate Sonnet-powered verifier agent with Task tool integration

Validation & Execution

Tool	Purpose
devplan_validate_plan	Validate plan structure and Haiku-executability
devplan_get_subtask	Get specific subtask details by ID
devplan_update_progress	Mark subtasks complete with notes
devplan_progress_summary	Get completion stats and next actions

Lessons Learned

Feedback loop that captures issues from verification and incorporates them into future plans.

Tool	Purpose
devplan_add_lesson	Capture a lesson from verifier findings
devplan_list_lessons	List accumulated lessons by severity
devplan_archive_lesson	Archive old lessons without deleting them
devplan_delete_lesson	Remove outdated or incorrect lessons
devplan_extract_lessons_from_report	Auto-extract lessons from verification reports

Issue Remediation

Convert GitHub issues into structured remediation tasks — perfect for bug fixes and post-release maintenance.

Tool	Purpose
devplan_parse_issue	Analyze a GitHub issue to extract requirements
devplan_issue_to_task	Generate remediation task with subtasks from an issue

Analytics

Tool	Purpose
devplan_usage_stats	View usage distribution across users

Why DevPlan?

Without DevPlan	With DevPlan
Context lost between sessions	Plans preserve full context
Inconsistent code quality	Haiku follows exact specifications
Same mistakes repeated	Lessons learned system prevents recurrence
No verification step	Sonnet actively tries to break the code
Bugs found in production	Issues caught before release
Plans need interpretation	Validated plans are copy-paste ready

Dashboard & Analytics

DevPlan includes a public dashboard for viewing aggregate usage statistics:

Dashboard URL: devplanmcp.store/dashboard

The dashboard shows:

• Summary cards: Total sessions, total tool calls, countries reached
• Line chart: Sessions and tool calls over the last 30 days
• Country table: Top 10 countries by session count

Privacy

All analytics are privacy-preserving:

• No IP storage: Only Cloudflare-derived country/region codes
• No user identification: Sessions are anonymous
• Auto-expiration: Daily stats expire after 90 days via KV TTL

Development

npm install
npm run dev      # Local development
npm run deploy   # Deploy to Cloudflare Workers

Contributing

Contributions welcome! Please see the ClaudeCode-DevPlanBuilder repo for methodology details.

License

MIT

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Built for Claude Code

Model Context Protocol • Cloudflare Workers • DevPlanBuilder Methodology