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Agent skill

Feature

by NiceEval in NiceEval/NiceEval

Inspect, design, trace, or revise NiceEval Feature and Use Case contracts.

No licenceAuto-check passed

Install Feature

skills CLI
$ npx skills add NiceEval/NiceEval --skill feature -a claude-code

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

GitHub CLI
$ gh skill install NiceEval/NiceEval feature --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/NiceEval/NiceEval.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/feature .claude/skills/feature && 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
GitHub stars
156
Token cost
~661 tokens
SKILL.md length
329 words
Files
1
Skills in repo
11
Repo updated
First seen
Licence
None found

At a glance

Inspect, design, trace, or revise NiceEval Feature and Use Case contracts.

  • Adopted current product behavior
  • Calls pnpm
  • Use Roadmap for finalized but unadopted directions and Design for competing plans

What it does

Feature is an agent skill from NiceEval/NiceEval. Inspect, design, trace, or revise NiceEval Feature and Use Case contracts. Use for adopted current product behavior; use Roadmap for finalized but unadopted directions and Design for competing plans.

Its SKILL.md is about 660 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It works with pnpm. The repository describes itself as: build eval for your agent in 10 mins.

When your agent uses it

  • Adopted current product behavior
  • Use Roadmap for finalized but unadopted directions and Design for competing plans

Example prompts

  • “/feature”

What it can do on your machine

Read from SKILL.md and the folder at commit 011a00a. 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

    Shell commands in SKILL.md call:

    • pnpm

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

  • Network

    No URLs in SKILL.md. Its commands use pnpm, which can reach the network depending on how they are called.

    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 loads about 661 tokens when it runs. Until then it costs about 52 tokens; SKILL.md has 329 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~52
When it runs · the whole SKILL.md, loaded when a task matches
~661

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

Without a licence we can't republish the file, so here is its outline and opening line. It has 329 words (~661 tokens).

“Read the Feature authoring contract and the Trace workflow before changing a Feature or Use Case. Run pnpm run repo docs feature --help for current command syntax.”

— opening of SKILL.md by NiceEval
name
feature
metadata.command
pnpm run repo docs feature
metadata.design
docs/feature/README.md

Read the full SKILL.md on GitHub

Files

Just SKILL.md in .agents/skills/feature of NiceEval/NiceEval.

Open the folder on GitHubat commit 011a00a

Compare with similar skills

Feature 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 compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Feature this skillNiceEval/NiceEval156—~661Automated safety check: PassNone
DeerFlow Smoke Testbytedance/deer-flow83k—~2.5kAutomated safety check: NotesMIT
@pierre/diffs Code Renderingpierrecomputer/pierre6.2k2 repos~803Automated safety check: PassApache-2.0
React Router Release Notes Prepremix-run/react-router57k—~1.1kAutomated safety check: PassMIT
Vuetify Playgroundvuetifyjs/vuetify41k—~730Automated safety check: PassCustom licence
Iron Proxy Gateway for NanoClawnanocoai/nanoclaw31k—~4.6kAutomated safety check: NotesMIT

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    83k GitHub stars~2.5k tokensUpdated today
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  • @pierre/diffs Code Rendering

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    Guides an agent through using @pierre/diffs to render syntax-highlighted files and diffs, and to build editing and review surfaces in React or plain JavaScript.

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  • Pull Requests

    pnpm/pnpm

    Take a change through a pull request in the pnpm repository — opening it, then staying with it after every push until CI is green and the review round is quiet.

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  • Issue

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  • Feedback

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  • Pull Request

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    Create, update, or validate a NiceEval pull request body. An agent skill from NiceEval/NiceEval.

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    Auto-check passed

Works with

Questions about Feature

What does Feature do?

Inspect, design, trace, or revise NiceEval Feature and Use Case contracts. Feature is an agent skill from NiceEval/NiceEval. Inspect, design, trace, or revise NiceEval Feature and Use Case contracts.

When should I use Feature?

Feature fits situations like: adopted current product behavior; use Roadmap for finalized but unadopted directions and Design for competing plans.

How do I install Feature in Claude Code?

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

How do I install Feature in Codex?

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

Can I use Feature 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 NiceEval/NiceEval --skill feature -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, .gemini/skills/feature, .github/skills/feature and .opencode/skills/feature in your project.

What does Feature need to run?

Going by SKILL.md and its folder, Feature needs the command-line tools its instructions call (pnpm).

Does Feature 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 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 use?

No licence was found for Feature or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Feature use?

About 661 tokens (SKILL.md is roughly 2.6k 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?

Skills that share tags, products or a category with Feature: DeerFlow Smoke Test (bytedance/deer-flow, 83k stars), @pierre/diffs Code Rendering (pierrecomputer/pierre, 6.2k stars), React Router Release Notes Prep (remix-run/react-router, 57k stars) and Vuetify Playground (vuetifyjs/vuetify, 41k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Feature?

NiceEval (a GitHub organization) maintains it in NiceEval/NiceEval, which has 156 GitHub stars. The repository holds 11 skills in this directory. The repository was last updated on October 7, 2026.

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