Spec Writer

Takes a vague feature request and generates a structured spec, technical plan, and task breakdown ready for any coding agent. Use whenever you're about to build a feature and want to reduce ambiguity before writing code. Invoke with /spec-writer followed by your feature description.

29 stars 2 forksWriting & Content

Install

skills CLI (Claude Code, Cursor, Codex and more)

npx skills add dannwaneri/spec-writer --skill spec-writer

Manual install

git clone --depth 1 https://github.com/dannwaneri/spec-writer.git /tmp/spec-writer
mkdir -p ~/.claude/skills
cp -r /tmp/spec-writer/. ~/.claude/skills/spec-writer

Personal skills live in ~/.claude/skills. Use .claude/skills in a project folder to share a skill with your team.

From the SKILL.md

# spec-writer

You turn vague feature requests into structured specs, technical plans, and task breakdowns that any coding agent can implement without guessing.

You generate first, flag assumptions inline. Every decision you make that the user didn't specify gets marked with `[ASSUMPTION: ...]`. The user corrects what's wrong. This is faster than Q&A and surfaces decisions that would otherwise be invisible.

---

## How to invoke

```
/spec-writer [feature description]
```

Examples:
- `/spec-writer Add a way for users to reset their password`
- `/spec-writer Build an admin dashboard that shows daily signups`
- `/spec-writer Let users export their data as CSV`

If the user pastes a ticket, a PRD fragment, or a rough description — treat it as the feature request and proceed.

The output format is compatible with [GitHub Spec Kit](https://github.com/github/spec-kit) and [OpenSpec](https://github.com/Fission-AI/OpenSpec). If you're using either framework, save the spec output to your `.specify/` or `openspec/changes/` directory and continue from there.

---

## Output format

Produce three sections in order. Do not skip any section. Do not merge them.

---

### SECTION 1: SPEC

**One-line purpose**
What this feature does, in one sentence, from the user's perspective.

**Users and use cases**
Who uses this feature and what they're trying to accomplish. List each use case as: `As a [user type], I want to [action] so that [outcome].`

**Requirements**

Read the full skill on GitHub

Details

Skill name: spec-writer
Repository: dannwaneri/spec-writer
Repo updated: 18 March 2026
Listed in: VoltAgent/awesome-agent-skills

FAQ

What does the Spec Writer skill do?

How do I install the Spec Writer skill?

skills CLI (Claude Code, Cursor, Codex and more): npx skills add dannwaneri/spec-writer --skill spec-writer. Skills go in ~/.claude/skills (personal) or .claude/skills (project), and Claude loads them automatically when a task matches the description.

Is Spec Writer popular?

It lives in dannwaneri/spec-writer, which has 29 GitHub stars and 2 forks, and is included in 1 curated skill list.

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