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DevPlan MCP Server

License: MIT MCP Cloudflare Workers 19 Tools

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 verification, lessons learned, and issue remediation workflows.

flowchart LR subgraph Planning["📋 Planning"] A[Interview] --> B[Brief] B --> C[Plan] end subgraph Execution["⚡ Execution"] C --> D[Execute] D --> E[Verify] end subgraph Learning["🧠 Learning"] E -->|issues| F[Lessons] F -->|improve| C end subgraph Remediation["🔧 Remediation"] G[GitHub Issue] --> H[Parse] H --> I[Task] I --> D end style A fill:#e1f5fe,stroke:#0288d1 style F fill:#fff3e0,stroke:#f57c00 style G fill:#fce4ec,stroke:#c2185b

Key Features

Feature

Description

Inline Methodology

All guidance is embedded — no external fetches needed

Haiku-Executable Plans

Plans so detailed that Claude Haiku can execute them

Lessons Learned

Captures issues from verification and injects them into future plans

Issue Remediation

Converts GitHub issues directly into remediation tasks

Tech Conflict Detection

Warns about incompatible technology choices

Executor & Verifier Agents

Auto-generates specialized agents for your project

Install

claude mcp add devplan --transport sse https://devplan-mcp-server.mike-c63.workers.dev/sse

Or add to ~/.claude/mcp.json:

{ "mcpServers": { "devplan": { "type": "sse", "url": "https://devplan-mcp-server.mike-c63.workers.dev/sse" } } }

Quick Start

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

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

sequenceDiagram participant You participant Claude as Claude Code participant MCP as DevPlan MCP participant KV as Lessons KV rect rgb(240, 248, 255) Note over You,MCP: 📋 Planning Phase You->>Claude: "build me a CLI tool" Claude->>MCP: devplan_start() MCP-->>Claude: inline methodology guidance Claude->>You: Interview questions (one at a time) You-->>Claude: Answers Claude->>MCP: devplan_create_brief() MCP-->>Claude: PROJECT_BRIEF.md Claude->>MCP: devplan_generate_plan() MCP->>KV: fetch lessons learned KV-->>MCP: past lessons MCP-->>Claude: DEVELOPMENT_PLAN.md + lessons Claude->>MCP: devplan_generate_executor() Claude->>MCP: devplan_generate_verifier() end rect rgb(255, 248, 240) Note over You,Claude: ⚡ Execution Phase loop Each Subtask Claude->>Claude: Execute with Haiku agent Claude->>Claude: Verify with Sonnet agent Claude->>MCP: devplan_update_progress() end end rect rgb(240, 255, 240) Note over You,KV: 🧠 Learning Phase Claude->>MCP: devplan_extract_lessons_from_report() Claude->>MCP: devplan_add_lesson() MCP->>KV: store for future projects end Claude-->>You: ✅ Project complete!

Usage Examples

New Project

"Use devplan 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"

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

devplan_generate_claude_md

Generate CLAUDE.md scaffold

devplan_generate_executor

Generate Haiku-powered executor agent

devplan_generate_verifier

Generate Sonnet-powered verifier agent

Execution

Tool

Purpose

devplan_validate_plan

Check plan completeness and structure

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

flowchart LR A["gh issue view 123 --json ..."] --> B[devplan_parse_issue] B --> C{Analysis} C --> D[Type: bug/feature] C --> E[Severity: 🔴🟠🟡🔵] C --> F[Components] B --> G[devplan_issue_to_task] G --> H[DEVELOPMENT_PLAN.md] style A fill:#f5f5f5,stroke:#333 style H fill:#c8e6c9,stroke:#2e7d32

Architecture

graph TB subgraph Client["Claude Code"] CC[Claude Code CLI] end subgraph MCP["DevPlan MCP Server"] SSE[SSE Endpoint] Tools[19 MCP Tools] Gen[Plan Generators] end subgraph Storage["Cloudflare"] KV[(Lessons KV)] DO[Durable Objects] end subgraph Methodology["Reference"] GH[GitHub: ClaudeCode-DevPlanBuilder] end CC <-->|SSE| SSE SSE --> Tools Tools --> Gen Gen --> KV Tools --> DO Gen -.->|examples| GH style CC fill:#e3f2fd,stroke:#1565c0 style KV fill:#fff3e0,stroke:#ef6c00 style GH fill:#f3e5f5,stroke:#7b1fa2

Recent Updates

timeline title DevPlan MCP Server - December 2025 / January 2026 section Week 4 Haiku-Executable Phases : Claude writes complete code, not scaffolds Lesson Archiving : Archive old lessons without deletion Severity Filtering : Filter lessons by min severity Verifier Workflow : Prompts to run verifier at 100% section Week 3 Content Drift Detection : Detects outdated inline guidance Inline Methodology : No external fetches needed Issue Remediation : GitHub issues → tasks section Week 2 Error Recovery : Executor agent guidance Lessons Enhancement : Active feedback loop Verifier Agent : Auto-generate verifiers section Week 1 Tech Conflict Detection : Warns on bad combos Task Complete Sections : Squash merge workflow

Why DevPlan?

graph LR subgraph Without["❌ Without DevPlan"] A1[Vague prompt] --> A2[Inconsistent code] A2 --> A3[Lost context] A3 --> A4[Repeated mistakes] end subgraph With["✅ With DevPlan"] B1[Structured interview] --> B2[Detailed plan] B2 --> B3[Haiku executes] B3 --> B4[Sonnet verifies] B4 --> B5[Lessons captured] B5 -.-> B2 end style A4 fill:#ffcdd2,stroke:#c62828 style B5 fill:#c8e6c9,stroke:#2e7d32

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

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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security - not tested
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license - not found
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quality - not tested

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