Hook Development for Claude Code Plugins
anthropics/claude-plugins-official
Explains how to write Claude Code plugin hooks, both prompt-based checks and bash commands, for events such as PreToolUse, Stop and SessionStart.
Expert at creating and modifying Claude Code slash commands.
Install Building Commands
$ npx skills add aiskillstore/marketplace --skill building-commands -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install aiskillstore/marketplace building-commands --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/c0ntr0lledcha0s/building-commands .claude/skills/building-commands && rm -rf skills-srcUse ~/.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/
Install the "building-commands" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/c0ntr0lledcha0s/building-commands into .claude/skills/building-commands/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "building-commands", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/aiskillstore/marketplace/tree/main/skills/c0ntr0lledcha0s/building-commandsType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add aiskillstore/marketplace --skill building-commands -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install aiskillstore/marketplace building-commands --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/c0ntr0lledcha0s/building-commands .agents/skills/building-commands && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "building-commands" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/c0ntr0lledcha0s/building-commands into .agents/skills/building-commands/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "building-commands", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add aiskillstore/marketplace --skill building-commands -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install aiskillstore/marketplace building-commands --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/c0ntr0lledcha0s/building-commands .cursor/skills/building-commands && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "building-commands" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/c0ntr0lledcha0s/building-commands into .cursor/skills/building-commands/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "building-commands", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/aiskillstore/marketplace.git --path skills/c0ntr0lledcha0s/building-commands--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add aiskillstore/marketplace --skill building-commands -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install aiskillstore/marketplace building-commands --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/c0ntr0lledcha0s/building-commands .gemini/skills/building-commands && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "building-commands" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/c0ntr0lledcha0s/building-commands into .gemini/skills/building-commands/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "building-commands", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install aiskillstore/marketplace building-commandsInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add aiskillstore/marketplace --skill building-commands -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/c0ntr0lledcha0s/building-commands .github/skills/building-commands && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "building-commands" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/c0ntr0lledcha0s/building-commands into .github/skills/building-commands/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "building-commands", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add aiskillstore/marketplace --skill building-commands -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install aiskillstore/marketplace building-commands --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/c0ntr0lledcha0s/building-commands .opencode/skills/building-commands && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "building-commands" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/c0ntr0lledcha0s/building-commands into .opencode/skills/building-commands/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "building-commands", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
building-commands- GitHub stars
- 430
- Token cost
- ~4.4k tokens
- SKILL.md length
- 1,351 words
- Files
- 7 (incl. scripts, references)
- Skills in repo
- 1,044
- Repo updated
- First seen
- Licence
- None found
At a glance
Expert at creating and modifying Claude Code slash commands.
- Works in 5 steps: Gather Requirements → Design the Command → Write the Command File → …
- Wants to create
- SKILL.md covers When to Create a Command vs…, Command Schema & Structure, Command Body Content and Creating a Command, plus 3 more sections
- Runs Python scripts from its folder; calls python3
What it does
Building Commands is an agent skill from aiskillstore/marketplace. Expert at creating and modifying Claude Code slash commands. Auto-invokes when the user wants to create, update, modify, enhance, validate, or standardize slash commands, or when modifying command YAML frontmatter fields (especially 'model', 'allowed-tools', 'description'), needs help designing command workflows, or wants to understand command arguments and parameters. Also auto-invokes proactively when Claude is about to write command files (/commands/.md), or implement tasks that involve creating slash command…
Its SKILL.md is about 4.4k tokens, which your agent loads only when the skill is triggered. The skill folder holds 9 other files, including scripts and reference files (for example `references/command-checklist.md`, `references/command-migration-guide.md` and `references/command-update-patterns.md`).
It sits in Agent Workflows, covering Hooks and plugins. The repository describes itself as: Security-audited skills for Claude, Codex & Claude Code. One-click install, quality verified.
When your agent uses it
- Wants to create
- Standardize slash commands
- Modifying command YAML frontmatter fields (especially model
- Needs help designing command workflows
Example prompts
- “allowed-tools”
- “description”
- “/building-commands”
Requirements
- Python 3
- Pre-approved tools (allowed-tools): Read, Write, Edit, Grep, Glob, Bash
Workflow steps
5 steps, taken from the step headings in SKILL.md.
- Gather Requirements
- Design the Command
- Write the Command File
- Validate the Command
- Test the Command
What it can do on your machine
Read from SKILL.md and the folder at commit 755bc35. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
ReadWriteEditGrepGlobBash
From allowed-tools in the SKILL.md frontmatter.
Runs code
Ships 1 file in scripts/ (Python), which the agent can run.
Shell commands in SKILL.md call:
python3
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
docs.anthropic.com
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
Building Commands loads about 4.4k tokens when it runs, and up to ~13k if it reads all its reference files. Until then it costs about 137 tokens; SKILL.md has 1,351 words of instructions outside code blocks.
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.
- NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
allowed-tools: Read, Write, Edit, Grep, Glob, Bash
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); the scripts in this folder are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 1,351 words (~4,368 tokens).
“You are an expert at creating Claude Code slash commands. Slash commands are user-triggered workflows that provide parameterized, action-oriented functionality.”
- name
- building-commands
- allowed-tools
- Read, Write, Edit, Grep, Glob, Bash
- version
- 2.0.0
Files
SKILL.md and 6 other files (scripts, references) in skills/c0ntr0lledcha0s/building-commands of aiskillstore/marketplace.
- SKILL.md
- references/command-checklist.md
- references/command-migration-guide.md
- references/command-update-patterns.md
- scripts/validate-command.py
- skill-report.json
- templates/command-template.md
Open the folder on GitHubat commit 755bc35
Compare with similar skills
Building Commands 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Building Commands this skillaiskillstore/marketplace | 430 | — | ~4.4k | Automated safety check: Notes | None | |
| Hook Development for Claude Code Pluginsanthropics/claude-plugins-official | 38k | 10 repos | ~4.1k | Automated safety check: Notes | Apache-2.0 | |
| Claude Code Agent Developmentanthropics/claude-plugins-official | 38k | 7 repos | ~2.8k | Automated safety check: Pass | Apache-2.0 | |
| Claude Code Skill Developer Guidediet103/claude-code-infrastructure-showcase | 10k | 11 repos | ~3.5k | Automated safety check: Pass | MIT | |
| Plugin Settings Patternanthropics/claude-plugins-official | 38k | 7 repos | ~3k | Automated safety check: Pass | Apache-2.0 | |
| MCP Integration for Pluginsanthropics/claude-plugins-official | 38k | 11 repos | ~3.1k | Automated safety check: Pass | Apache-2.0 |
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Related
Categories
Questions about Building Commands
What does Building Commands do?
Expert at creating and modifying Claude Code slash commands. Building Commands is an agent skill from aiskillstore/marketplace. Expert at creating and modifying Claude Code slash commands.
When should I use Building Commands?
Building Commands fits situations like: wants to create; standardize slash commands; modifying command YAML frontmatter fields (especially model; needs help designing command workflows.
How do I install Building Commands in Claude Code?
Run `npx skills add aiskillstore/marketplace --skill building-commands -a claude-code`. Or copy the skill folder (skills/c0ntr0lledcha0s/building-commands in aiskillstore/marketplace) into .claude/skills/building-commands in your project. Claude Code loads it when a task matches its description.
How do I install Building Commands in Codex?
Run `npx skills add aiskillstore/marketplace --skill building-commands -a codex`. Or copy the skill folder (skills/c0ntr0lledcha0s/building-commands in aiskillstore/marketplace) into .agents/skills/building-commands in your project. Codex loads it when a task matches its description.
Can I use Building Commands 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 aiskillstore/marketplace --skill building-commands -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/building-commands, .gemini/skills/building-commands, .github/skills/building-commands and .opencode/skills/building-commands in your project.
What does Building Commands need to run?
Going by SKILL.md and its folder, Building Commands needs Python for the scripts in its folder and the command-line tools its instructions call (python3). Our summary lists: Python 3. Its frontmatter pre-approves these tools: Read, Write, Edit, Grep, Glob, Bash.
Does Building Commands access the network?
SKILL.md names 1 domain. As links in the text: docs.anthropic.com. This is read from the text; nothing was executed.
Is Building Commands safe to install?
Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
What licence does Building Commands use?
No licence was found for Building Commands or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Building Commands use?
About 4.4k tokens (SKILL.md is roughly 17k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 8.9k tokens, read only when the agent opens those files.
What are the alternatives to Building Commands?
Skills that share tags, products or a category with Building Commands: Hook Development for Claude Code Plugins (anthropics/claude-plugins-official, 38k stars), Claude Code Agent Development (anthropics/claude-plugins-official, 38k stars), Claude Code Skill Developer Guide (diet103/claude-code-infrastructure-showcase, 10k stars) and Plugin Settings Pattern (anthropics/claude-plugins-official, 38k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Building Commands?
aiskillstore (a GitHub organization) maintains it in aiskillstore/marketplace, which has 430 GitHub stars. The repository holds 1,044 skills in this directory. The repository was last updated on October 9, 2026.
Source: aiskillstore/marketplace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.