Spec Synthesizer

by rengwu

Spec Synthesizer is a Writing skill for Claude Code, published by rengwu in wayfinder-maps.

95 stars1 forkson rengwu/wayfinder-mapsAdded 2026/07/16+2% in starsRepository updated 2026/07/14

View source on GitHub Download repo ZIP

agent-skillsgo

Install in seconds

Install Spec Synthesizer

Copy Spec Synthesizer into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/rengwu/wayfinder-maps/tree/main/skills/.optional/to-spec ~/.claude/skills/to-spec

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/rengwu/wayfinder-maps.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: skills/.optional/to-spec/SKILL.md in rengwu/wayfinder-maps
Installs to: ~/.claude/skills/to-spec
Collection: One of 14 skills cataloged from this repository
Category: Writing — 1361 skills

What Spec Synthesizer does

Synthesizes a software specification from the ongoing conversation and saves it as a structured plan document. Useful for capturing requirements and decisions without interrupting the workflow.

Spec Synthesizer is cataloged under Writing on DirSkills. Spec Synthesizer comes from a repository tagged agent-skills and go.

Documentation

README

Excerpt

This skill takes the current conversation context and codebase understanding and produces a spec (you may know this document as a PRD). Do NOT interview the user — just synthesize what you already know.

Process

Explore the repo to understand the current state of the codebase, if you haven't already. If a CONTEXT.md glossary exists at the repo root, use its vocabulary throughout the spec; respect any ADRs in docs/adr/ in the area you're touching. If neither exists, proceed silently.

This is the opening of the README. Read the full README on GitHub.

Frequently asked about Spec Synthesizer

What else does rengwu publish alongside Spec Synthesizer?
Spec Synthesizer is one of 14 skills that DirSkills catalogs from rengwu/wayfinder-maps, the repository it ships in. Its siblings there include Codebase Design, Domain Modeling and Grill Me. Each one is a separate skill with its own page in this directory, installs the same way Spec Synthesizer does, and is maintained by rengwu in that same repository. The rest of the collection is listed on the rengwu/wayfinder-maps page.
How does Spec Synthesizer compare to other Writing skills?
Spec Synthesizer ranks #1216 by stars among the 1361 Writing skills in this catalog. The most-starred ones next to it are Article Writing, Social Media Content Calendar and Knowledge Comic Creator. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Spec Synthesizer against them. Open each page to compare what they document and how they install.