A printspec is a deterministic, agent-focused specification file that functions like a 3D printer file for software, ensuring any agent reading it produces equivalent working code.

What kind of projects is Spec-Print best for?

It is ideal for projects requiring high consistency, strict state management, and standardized API surfaces, such as backend services, CLI tools, and data-driven applications.

Can I customize the build process after providing a spec?

Yes, you can append natural language guidance using the `--` separator (e.g., `/spec-print myspec.md -- use Postgres`) to apply overrides or amendments to the build.

Does it support automated testing?

Yes, the spec includes a mandatory Test Plan section that enforces a specific implementation order (broken, failure, happy) to ensure software reliability.

How do I generate a specification from my existing project?

You can use the `/spec-print create` command. Claude will explore your codebase, infer logic, and generate a canonical markdown file covering entities, APIs, and business rules.

Spec-Print: Deterministic Software Builder

Name: Spec-Print: Deterministic Software Builder
Author: sethwebster

bysethwebster

0•

Developer Tools

Builds or reverse-engineers software using a standardized, deterministic "printspec" format to ensure consistent output across AI agents.

Spec-print introduces a rigorous methodology for software creation by treating requirements like 3D printer files. By utilizing a "printspec," developers ensure that any AI agent reading the specification produces equivalent, production-grade software regardless of the environment. This skill allows users to either "print" entire applications from a strict markdown-based spec or reverse-engineer existing codebases into a canonical document that defines entities, state machines, API surfaces, and design systems with absolute precision.

Key Features

010 GitHub stars

02Standardizes error handling and test-driven development workflows

03Maps comprehensive state machines with guards and terminal transitions

04Reverse-engineers complex codebases into structured "printspec" requirements

05Enforces strict determinism contracts for validation, ID formats, and timestamps

06Generates production-ready software from deterministic markdown specifications

Use Cases

01Documenting and migrating legacy codebases by extracting their core logic into a printspec

02Building consistent microservices across distributed teams using a shared specification

03Prototyping complex applications with enforced business rules and specific design systems

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add sethwebster/ai-marketplace spec-print

For use in Claude.ai and ChatGPT

Key Features

010 GitHub stars

02Standardizes error handling and test-driven development workflows

03Maps comprehensive state machines with guards and terminal transitions

04Reverse-engineers complex codebases into structured "printspec" requirements

05Enforces strict determinism contracts for validation, ID formats, and timestamps

06Generates production-ready software from deterministic markdown specifications

Use Cases

01Documenting and migrating legacy codebases by extracting their core logic into a printspec

02Building consistent microservices across distributed teams using a shared specification

03Prototyping complex applications with enforced business rules and specific design systems