Command development for Claude Code — build reusable slash commands

Prerequisites: Claude Code installed (the skill guides building its slash commands) — the skill is guidance the agent follows, not software Install "Command development for Claude Code — build reusable slash commands" for me. It gives my agent Anthropic's official guide to building slash commands: Markdown file format, YAML frontmatter fields (description, allowed-tools, model, argument-hint, disable-model-invocation), dynamic arguments ($ARGUMENTS, $1/$2), @ file references, inline bash execution, flat vs namespaced organization, best practices, common patterns (review, testing, docs, PR workflow), troubleshooting, and plugin features (${CLAUDE_PLUGIN_ROOT}, agent/skill/hook integration, validation patterns). IMPORTANT: the repo states no license — fetch from the link only, and reproduce nothing beyond the link. Repository: https://github.com/anthropics/claude-code/blob/main/plugins/plugin-dev/skills/command-development/SKILL.md 1. Fetch the SKILL.md file (and any helper files) from the repository path into a temporary folder and summarize what it does in one or two sentences. 2. Safety check: review the SKILL.md and scripts for anything suspicious (unexpected network calls, shell commands, credential harvesting). This repo should contain zero secrets in code. Verify that holds here; STOP on any red flag and tell me. 3. Install it as a skill: copy SKILL.md and its helper files into the agent's skills directory, in a folder named "command-development". 4. Verify with no network calls: frontmatter valid, files in place. 5. Report what was installed, where, and what I still need to do myself (e.g. tell the agent what command to create and where (.claude/commands/ vs ~/.claude/commands/); nothing else — it's a guide). GitHub is optional: if I have a GitHub account or the gh CLI, you may use it; otherwise public access is fine. Never require it unless it's in the prerequisites above. Rules: don't touch anything outside the temp folder and the install target. If anything looks off, stop and ask me.