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Agent skill

Feature Spec

by davepoon in davepoon/buildwithclaude

Creates a complete product feature specification with acceptance criteria, scope, dependencies, and risks.

MITAuto-check passedProduct & Project Management

Install Feature Spec

skills CLI
$ npx skills add davepoon/buildwithclaude --skill feature-spec -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install davepoon/buildwithclaude feature-spec --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/davepoon/buildwithclaude.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/agent-triforce/skills/feature-spec .claude/skills/feature-spec && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
feature-spec
GitHub stars
3.6k
Token cost
~409 tokens
SKILL.md length
171 words
Files
1
Skills in repo
245
Repo updated
First seen
Licence
MIT

At a glance

Creates a complete product feature specification with acceptance criteria, scope, dependencies, and risks.

  • Works in 6 steps: Runs the SIGN IN checklist (identity,… → Researches existing specs to avoid… → Creates a comprehensive spec at… → …
  • Tasks that involve PRD writing
  • SKILL.md covers When to Use This Skill, What This Skill Does, How to Use and Example, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Feature Spec is an agent skill from davepoon/buildwithclaude. Creates a complete product feature specification with acceptance criteria, scope, dependencies, and risks. Delegates to the Prometeo (PM) agent.

Its SKILL.md is about 410 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Product & Project Management, covering PRD writing and User stories. The repository describes itself as: A single hub to find Claude Skills, Agents, Commands, Hooks, Plugins, and Marketplace collections to extend Claude Code, Claude Desktop, Agent SDK and OpenClaw. The licence is MIT.

When your agent uses it

  • Tasks that involve PRD writing
  • Tasks that involve User stories

Example prompts

  • “Use the feature-spec skill to create a complete product feature specification with acceptance criteria, scope, dependencies, and risks”
  • “/feature-spec”

Workflow steps

6 steps, taken from the first numbered list in SKILL.md.

  1. Runs the SIGN IN checklist (identity, task, memory review)
  2. Researches existing specs to avoid conflicts
  3. Creates a comprehensive spec at docs/specs/{feature-name}.md
  4. Runs the Spec Completion checklist (TIME OUT)
  5. Prepares a structured handoff to the Dev agent
  6. Runs the SIGN OUT checklist (memory update, deliverables)

What it can do on your machine

Read from SKILL.md and the folder at commit 10bfc43. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Feature Spec loads about 409 tokens when it runs. Until then it costs about 39 tokens; SKILL.md has 171 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~39
When it runs · the whole SKILL.md, loaded when a task matches
~409

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from davepoon/buildwithclaude at commit 10bfc43, republished under its MIT licence (© davepoon). 171 words, ~409 tokens.

Download SKILL.mdSave it as .claude/skills/feature-spec/SKILL.md (or your agent's skills folder).
name
feature-spec
description
Creates a complete product feature specification with acceptance criteria, scope, dependencies, and risks. Delegates to the Prometeo (PM) agent.
category
workflow-orchestration

Feature Spec

Creates a complete product feature specification using the Prometeo (PM) agent.

When to Use This Skill

  • Defining a new feature or product requirement
  • Writing user stories with acceptance criteria
  • Planning product work that needs a structured spec
  • Documenting business requirements before implementation

What This Skill Does

  1. Runs the SIGN IN checklist (identity, task, memory review)
  2. Researches existing specs to avoid conflicts
  3. Creates a comprehensive spec at docs/specs/{feature-name}.md
  4. Runs the Spec Completion checklist (TIME OUT)
  5. Prepares a structured handoff to the Dev agent
  6. Runs the SIGN OUT checklist (memory update, deliverables)

How to Use

Basic Usage
/feature-spec user authentication with JWT tokens
Detailed Usage
/feature-spec multi-tenant billing system with Stripe integration

Example

User: /feature-spec webhook event system

Output: A complete spec at docs/specs/webhook-event-system.md containing:

  • Problem statement and success metrics
  • User stories with GIVEN/WHEN/THEN acceptance criteria
  • In-scope and out-of-scope items
  • Dependencies, risks, and open questions
  • Handoff notes for the Dev agent

Tips

  • Be specific about the feature scope in your description
  • The agent will ask clarifying questions rather than guess
  • Review the generated spec before passing to implementation

© davepoon, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in plugins/agent-triforce/skills/feature-spec of davepoon/buildwithclaude.

Open the folder on GitHubat commit 10bfc43

Compare with similar skills

Feature Spec next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Feature Spec compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Feature Spec this skilldavepoon/buildwithclaude3.6k—~409Automated safety check: PassMIT
Ralph Tui Create Beadssubsy/ralph-tui2.5k1 repos~2.6kAutomated safety check: PassMIT
Ralph Tui Create Beads Rustsubsy/ralph-tui2.5k1 repos~2.8kAutomated safety check: PassMIT
Ralph Tui Create JSONsubsy/ralph-tui2.5k1 repos~2.6kAutomated safety check: PassMIT
To Prdywwynm/EverythingDone14411 repos~777Automated safety check: PassGPL-3.0
Ralphjulianromli/opencode-template1441 repos~1.1kAutomated safety check: PassNone

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Categories

Questions about Feature Spec

What does Feature Spec do?

Creates a complete product feature specification with acceptance criteria, scope, dependencies, and risks. Feature Spec is an agent skill from davepoon/buildwithclaude. Creates a complete product feature specification with acceptance criteria, scope, dependencies, and risks.

When should I use Feature Spec?

Feature Spec fits situations like: tasks that involve PRD writing; tasks that involve User stories.

How do I install Feature Spec in Claude Code?

Run `npx skills add davepoon/buildwithclaude --skill feature-spec -a claude-code`. Or copy the skill folder (plugins/agent-triforce/skills/feature-spec in davepoon/buildwithclaude) into .claude/skills/feature-spec in your project. Claude Code loads it when a task matches its description.

How do I install Feature Spec in Codex?

Run `npx skills add davepoon/buildwithclaude --skill feature-spec -a codex`. Or copy the skill folder (plugins/agent-triforce/skills/feature-spec in davepoon/buildwithclaude) into .agents/skills/feature-spec in your project. Codex loads it when a task matches its description.

Can I use Feature Spec in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add davepoon/buildwithclaude --skill feature-spec -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/feature-spec, .gemini/skills/feature-spec, .github/skills/feature-spec and .opencode/skills/feature-spec in your project.

What does Feature Spec need to run?

SKILL.md names no scripts, command-line tools or credentials: Feature Spec is instructions for the agent only.

Does Feature Spec access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Feature Spec safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Feature Spec use?

Feature Spec is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Feature Spec use?

About 409 tokens (SKILL.md is roughly 1.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Feature Spec?

Skills that share tags, products or a category with Feature Spec: Ralph Tui Create Beads (subsy/ralph-tui, 2.5k stars), Ralph Tui Create Beads Rust (subsy/ralph-tui, 2.5k stars), Ralph Tui Create JSON (subsy/ralph-tui, 2.5k stars) and To Prd (ywwynm/EverythingDone, 144 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Feature Spec?

davepoon (a GitHub user) maintains it in davepoon/buildwithclaude, which has 3,604 GitHub stars. The repository holds 245 skills in this directory. The repository was last updated on October 6, 2026.

Source: davepoon/buildwithclaude on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.