01 · Build
Spec Agent
From idea to working architecture
Spec Agent is the front door of the Mutagent lifecycle. Describe what you want your agent to do in plain English, and Spec Agent turns that into a concrete, executable plan: the system prompts, the tools, the data flow, and the eval criteria that will tell you whether it works.
Where most teams spend two weeks white-boarding an architecture, Spec Agent gets you to a working scaffold in an afternoon. Every spec it produces is framework-agnostic and can be exported to LangGraph, CrewAI, Autogen, or your own runtime.
What it does
- Interactive requirements interview — asks the right clarifying questions
- Generates a recommended architecture diagram and node graph
- Drafts the system prompts and tool descriptions
- Defines eval criteria up front so success is measurable
- Exports a framework-agnostic spec ready for the Build Agent to scaffold
Inputs
- Plain-English requirements
- Existing prompts or traces (optional)
- Domain documents
Outputs
- Architecture diagram
- Node graph
- System prompts
- Eval criteria
- Framework-agnostic spec
Works with
Claude
Cursor
Notion
ConfluenceTry Spec Agent today
Install the CLI and run this agent against your own evals in under five minutes.
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