prompt wizard for developers

Your AI knows how to code. Merlyn tells it what to code.

Analyzes your project, detects your phase, generates the perfect next prompt.
37 MCP tools. Zero cloud. Runs locally in Cursor.

npx merlyn-mcp click to copy

View on GitHub

merlyn-mcp

MERLYN - Prompt Wizard MCP

BUILD phase · IMPLEMENT step

[x] Plan [x] Build [ ] Ship [ ] Grow

Suggested prompt:

Implement the authentication middleware. Write tests first, then the implementation. Use JWT with httpOnly cookies. Validate against the requirements in prd.md section 3.

how it works

Three commands. Zero configuration.

AI project analysis

Scans your codebase, reads your PRD and gameplan, detects exactly where you are in the development lifecycle. No manual tracking.

Smart prompt generation

Generates the exact prompt you should paste into Cursor next. Context-aware, phase-appropriate, with full project knowledge baked in.

37 MCP tools

Phase management, journals, verification gates, vulnerability scanning, complexity analysis, scope tracking. All local, all automatic.

the lifecycle

Four phases. Always know where you are.

Plan

Idea, research, PRD, gameplan. Understand what you're building before you build it.

Build

Rules, index, read, research, implement, test, debug. The 7-step cycle. If stuck 3+ times, tornado.

Ship

Review, deploy, monitor. Gates must pass -- build, test, lint -- before advancing.

Grow

Feedback, analyze, iterate. Collect data, triage issues, plan the next cycle.

core tools

Everything runs locally.

midas_analyze AI project analysis

midas_suggest_prompt Phase-aware next action

midas_verify Build/test/lint gates

midas_tornado Research + logs + tests

midas_journal_save Conversation context

midas_completeness Production readiness

midas_vuln_scan Security scanner

midas_complexity Code complexity

midas_oneshot Retry prompt builder

midas_horizon Context expansion

midas_start_hotfix Emergency bug fix

midas_advance_phase Phase progression

Tool names use midas_ prefix for compatibility with existing Cursor configs. All 37 tools run 100% locally.

methodology

Three principles when things go wrong.

Oneshot

When things break, go back with original prompt + error + "avoid this" instead of patching forward.

Tornado

Three forces spinning together solve any problem: research + logs + tests. Stuck 3 times? Tornado.

Horizon

AI thinks vertical (implementation). You provide horizontal (context). Wrong output means widen your context.

Start building smarter.

One command. No signup. No cloud. No API keys required.

npx merlyn-mcp click to copy

Or add to Cursor MCP config:

{
  "mcpServers": {
    "merlyn": {
      "command": "npx",
      "args": ["merlyn-mcp", "server"]
    }
  }
}