Spec Writing

by crbnos

Spec Writing is a Writing skill for Claude Code, published by crbnos in carbon.

2.3K stars327 forkson crbnos/carbonAdded 2026/07/21+1% in starsRepository updated 2026/08/06

View source on GitHub Download repo ZIP

businesserpleanmanagementmanufacturingmcp-servermespostgresqlqmsreact-routersupabasetypescript

Install in seconds

Install Spec Writing

Copy Spec Writing 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/crbnos/carbon/tree/main/.claude/skills/spec-writing ~/.claude/skills/spec-writing

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/crbnos/carbon.git

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

In this catalog

Source file: .claude/skills/spec-writing/SKILL.md in crbnos/carbon
Installs to: ~/.claude/skills/spec-writing
Collection: One of 47 skills cataloged from this repository
Category: Writing — 1361 skills

What Spec Writing does

Guides feature design and spec writing by researching competitors, making design decisions, and resolving open questions before writing the spec document. Use for new features, modules, data model changes, or cross-module changes.

Spec Writing is cataloged under Writing on DirSkills. Spec Writing comes from a repository tagged business, erp, lean, management and manufacturing.

Documentation

README

Excerpt

spec-writing — research, grill the open questions, THEN write the spec

Input: a feature request. Output: a complete spec at .ai/specs/{YYYY-MM-DD}-{slug}.md written after every open question has been resolved with the user. The interview happens before the document exists, so the spec is written once, around real answers — not written around guesses and reworked after the fact.

The spec is the single design artifact. Do not write separate "design docs" in other locations.

Announce at start: "Using the spec-writing skill — designing {feature}; I'll bring you the open questions before writing the spec."

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

Commands Spec Writing provides

Slash commands named in this skill’s SKILL.md, listed in the order they first appear.

/root-cause
/fix
/research
/grill
/plan
/feature

Frequently asked about Spec Writing

What else does crbnos publish alongside Spec Writing?
Spec Writing is one of 47 skills that DirSkills catalogs from crbnos/carbon, the repository it ships in. Its siblings there include Agent Browser, Agent Browser and Browser Error Snapshot. Each one is a separate skill with its own page in this directory, installs the same way Spec Writing does, and is maintained by crbnos in that same repository. The rest of the collection is listed on the crbnos/carbon page.
How does Spec Writing compare to other Writing skills?
Spec Writing ranks #264 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 Writing against them. Open each page to compare what they document and how they install.