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MySpec

AI Senior Architect for Spec-Driven Development that generates 4-file spec bundles before you write code

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MySpec turns vague ideas into deterministic 4-file technical specifications for AI coding agents like Cursor, Claude Code, and Devin.

The story so far

MySpec is an AI Senior Architect designed for Spec-Driven Development (SDD). It interviews developers about their ideas and generates four markdown specification files: constitution.md (non-negotiable principles), requirements.md (functional specifications in EARS+ format), solution.md (technical implementation details with Mermaid diagrams), and tasks.md (granular implementation tasks).

The platform aims to eliminate AI code hallucinations by replacing vague prompts with immutable architectural contracts. Developers describe their idea, answer a structured interview (5-15 questions), receive live-rendered spec files they can refine in chat, then export the complete bundle for use with AI coding agents via ZIP download or Model Context Protocol (MCP) server integration.

MySpec supports both Greenfield projects (starting from scratch) and Brownfield projects (updating existing codebases). It is currently in Open Beta with unlimited AI usage available free until general availability.

Typeset features

  • 4-file spec bundle generation (constitution, requirements, solution, tasks)
  • Structured interview to clarify scope and edge cases
  • Live Mermaid diagram rendering
  • ZIP export of spec bundle
  • MCP Server integration for IDE agents
  • Greenfield and Brownfield workflow support
  • EARS+ acceptance criteria format
  • Versioned diffs for spec refinement
  • Team collaboration and shared projects
  • Plain-English edits in chat

Pricing

Pricing model: Freemium

Free: 20 projects, 100 spec files, 20 public share links per month. Pro: 5× AI usage limit, 100 projects, unlimited specs. Team: 10× AI usage limit per seat (2 seats minimum), unlimited projects and specs.

Questions and answers

What is Spec-Driven Development (SDD)?

Spec-Driven Development is an AI-first methodology where structured specifications (constitution.md, requirements.md, solution.md, tasks.md) precede code generation to eliminate context drift and hallucinations. It replaces vague chat prompts with deterministic architectural contracts that AI coding agents follow consistently.

What's the difference between Greenfield and Brownfield projects?

Greenfield projects start from a blank slate where MySpec generates the full four-file bundle from your idea. Brownfield projects start from an existing codebase where MySpec analyzes what's already built, then walks through a change-focused interview before generating a requirements delta scoped to just that change.

What is constitution.md?

constitution.md contains non-negotiable principles and constraints that guide all subsequent phases. It acts as the project's supreme law, defining tech stack choices, architectural patterns, and coding standards that the AI must adhere to.

What is the MCP Server?

MCP (Model Context Protocol) is an open standard letting AI apps like Claude, ChatGPT, Claude Code, and Cursor connect to external tools. MySpec offers a hosted remote server at mcp.myspec.dev and a local npm package, letting AI clients list projects, read and update spec files, add comments, and start sessions without copy-pasting.

Which spec workflows does MySpec support?

MySpec supports three methodologies: MySpec (greenfield: interview → constitution → requirements → solution → tasks; brownfield: interview → proposal → requirements delta → optional tasks), Spec Kit (greenfield workflow), and OpenSpec (brownfield workflow). An Edit workflow refines any existing bundle with reviewable diffs.

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More on this profile

MySpec has a free listing. The owner can unlock the full profile with a paid launch for $5:

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