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Agent skill

Think

by ninehills in ninehills/skills

Turns rough ideas into approved, decision-complete plans with validated structure before coding.

No licenceAuto-check: notesDevelopment

Install Think

skills CLI
$ npx skills add ninehills/skills --skill think -a claude-code

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

GitHub CLI
$ gh skill install ninehills/skills think --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/ninehills/skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/think .claude/skills/think && 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
think
GitHub stars
280
Token cost
~4k tokens
SKILL.md length
2,229 words
Files
1
Skills in repo
38
Repo updated
First seen
Licence
None found

At a glance

Turns rough ideas into approved, decision-complete plans with validated structure before coding.

  • Users ask in any language for planning
  • SKILL.md covers Outcome Contract, Durable Context Preflight, Lightweight Mode and Evaluation Mode, plus 9 more sections
  • Calls bash and git
  • Design direction

What it does

Think is an agent skill from ninehills/skills. Turns rough ideas into approved, decision-complete plans with validated structure before coding. Use when users ask in any language for planning, architecture, design direction, feasibility, value judgment, or whether a feature is worth doing before implementation. Not for bug fixes or small edits.

Its SKILL.md is about 4k 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 Development, covering Debugging.

When your agent uses it

  • Users ask in any language for planning
  • Design direction
  • Whether a feature is worth doing before implementation

Example prompts

  • “Use the think skill to turn rough ideas into approved, decision-complete plans with validated structure before coding”
  • “/think”

What it can do on your machine

Read from SKILL.md and the folder at commit f3e82a7. 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:

    • bash
    • git

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

  • Network

    No URLs in SKILL.md. Its commands use git, 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

Think loads about 4k tokens when it runs. Until then it costs about 76 tokens; SKILL.md has 2,229 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~76
When it runs · the whole SKILL.md, loaded when a task matches
~4k

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: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

  • NoteMentions a .env fileSKILL.md:87
    on`, `tauri.conf.json`, `package.json`, `.env`) and lift the live value. Never quote a default from memory or docs.

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 2,229 words (~4,016 tokens).

“Prefix your first line with 🥷 inline, not as its own paragraph.”

— opening of SKILL.md by ninehills
name
think
when_to_use
出方案, 给方案, 深入分析, 怎么设计, 用什么方案, 判断一下, 有没有必要, 值不值得, what's the best approach, plan this, how should I, should we keep this
dispatch_intent
New feature, architecture, how should I design this, value judgment, executable plan, handoff

Read the full SKILL.md on GitHub

Files

Just SKILL.md in think of ninehills/skills.

Open the folder on GitHubat commit f3e82a7

Compare with similar skills

Think 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.

Think compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Think this skillninehills/skills280—~4kAutomated safety check: NotesNone
Trellis Session Insightmindfold-ai/Trellis15k4 repos~1.7kAutomated safety check: PassAGPL-3.0
Trellis Channelmindfold-ai/Trellis15k4 repos~1.2kAutomated safety check: PassAGPL-3.0
Vibe Coding PartnershareAI-lab/Kode-CLI5.2k—~5.6kAutomated safety check: PassApache-2.0
Leon Coding Agentleon-ai/leon18k—~1.1kAutomated safety check: PassMIT
Octocode Code Researchbgauryy/octocode949—~1.5kAutomated safety check: PassMIT

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Categories

Questions about Think

What does Think do?

Turns rough ideas into approved, decision-complete plans with validated structure before coding. Think is an agent skill from ninehills/skills. Turns rough ideas into approved, decision-complete plans with validated structure before coding.

When should I use Think?

Think fits situations like: users ask in any language for planning; design direction; whether a feature is worth doing before implementation.

How do I install Think in Claude Code?

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

How do I install Think in Codex?

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

Can I use Think 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 ninehills/skills --skill think -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/think, .gemini/skills/think, .github/skills/think and .opencode/skills/think in your project.

What does Think need to run?

Going by SKILL.md and its folder, Think needs the command-line tools its instructions call (bash and git).

Does Think access the network?

SKILL.md contains no URLs. Its commands use git, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Think safe to install?

Our automated static check of SKILL.md found notes only (mentions a .env file), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Think use?

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

How many tokens does Think use?

About 4k tokens (SKILL.md is roughly 16k 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 Think?

Skills that share tags, products or a category with Think: Trellis Session Insight (mindfold-ai/Trellis, 15k stars), Trellis Channel (mindfold-ai/Trellis, 15k stars), Vibe Coding Partner (shareAI-lab/Kode-CLI, 5.2k stars) and Leon Coding Agent (leon-ai/leon, 18k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Think?

ninehills (a GitHub user) maintains it in ninehills/skills, which has 280 GitHub stars. The repository holds 38 skills in this directory. The repository was last updated on June 22, 2026.

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