Spec Writer

Quality score: 70/100 · Category: Content · Sub-category: content-misc

Generate structured software specifications for features, bug fixes, and products. Use when the user wants to create a spec, PRD, feature brief, requirements document, or when starting any new implementation that needs a specification first. Invoke via /spec-writer or when the user says "write a spec", "spec this out", "create a spec", "I need a spec for...", or describes a feature they want to build. Produces adaptive-complexity specs with Job Stories, Gherkin acceptance criteria, and three-tier boundaries. Output is a markdown file ready for agent execution or human review.

What this skill does

Spec Writer is a production-ready Claude Code skill (quality score 70/100) in the content-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/spec-writer/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when the user wants to create a spec, PRD, feature brief, requirements document, or when starting any new implementation that needs a specification first. Invoke via /spec-writer or when the user says "write a spec", "spec this out", "create a spec", "I need a spec for.

Who uses this skill

The Spec Writer skill is built for content creators, marketers, copywriters, SEO professionals, and editorial teams. It is part of the open ClaudSkills registry, a community-curated catalog of 15,000+ capabilities you can install for Claude Code — the Claude CLI agent.

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/spec-writer
curl -L https://claudskills.com/skills/spec-writer/SKILL.md \
  -o ~/.claude/skills/spec-writer/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/spec-writer/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/spec-writer/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\spec-writer\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.