Tool Specification

by kangarooking

Tool Specification is an AI Engineering skill for Claude Code, published by kangarooking in system-prompt-skills.

182 stars40 forkson kangarooking/system-prompt-skillsAdded 2026/09/06+3% in starsRepository updated 2026/05/04

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agent-designagent-skillsai-agentscangjie-skillcontext-managementprompt-engineeringprompt-injectionsystem-prompttool-use

Install in seconds

Install Tool Specification

Copy Tool Specification into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/kangarooking/system-prompt-skills/tree/main/tool-specification ~/.claude/skills/tool-specification

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/kangarooking/system-prompt-skills.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: tool-specification/SKILL.md in kangarooking/system-prompt-skills
Installs to: ~/.claude/skills/tool-specification
Collection: One of 15 skills cataloged from this repository
Category: AI Engineering — 3278 skills

What Tool Specification does

Tool Specification defines how to design AI tool interfaces, discovery, permissions, and parallel execution. Use it when an agent needs to call external APIs, manage many tools, or delegate work to sub-agents.

Tool Specification is cataloged under AI Engineering on DirSkills. Tool Specification comes from a repository tagged agent-design, agent-skills, ai-agents, cangjie-skill and context-management.

Documentation

README

Excerpt

工具定义与集成模式 (Tool Specification)

R — 原文 (Reading)

Claude Code: ToolSearch 用于延迟加载, parallel tool calls, Agent tool 用于子代理委托 Claude Chrome: PURL 紧凑命令模式, 三层行动分类 (Prohibited/Explicit Permission/Regular) GPT-4o: Content Reference System, file_search with citation format ChatGPT Agent Mode: 三通道架构 (analysis/commentary/final), browser+computer+container tools Meta AI: 四个命名空间 (media, browser, meta_1p, container, third_party) with full JSON Schema Grok 4: Custom XML function call format (xai:function_call), code_execution with stateful REPL

I — 方法论骨架 (Interpretation)

工具定义与集成的核心设计模式包含五个正交维度：

This is the opening of the README. Read the full README on GitHub.

Frequently asked about Tool Specification

What else does kangarooking publish alongside Tool Specification?
Tool Specification is one of 15 skills that DirSkills catalogs from kangarooking/system-prompt-skills, the repository it ships in. Its siblings there include Agent Delegation, Citation System and Code Engineering. Each one is a separate skill with its own page in this directory, installs the same way Tool Specification does, and is maintained by kangarooking in that same repository. The rest of the collection is listed on the kangarooking/system-prompt-skills page.
How does Tool Specification compare to other AI Engineering skills?
Tool Specification ranks #3056 by stars among the 3278 AI Engineering skills in this catalog. The most-starred ones next to it are Architecture Decision Records, AI-First Engineering and Agentic OS. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Tool Specification against them. Open each page to compare what they document and how they install.