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

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

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

Generation

Validation & Execution

Lessons Learned

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

Issue Remediation

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

Analytics

Why DevPlan?

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