Agent Skill
CLI Developer skill
cli-developerJeffallan/claude-skillsskills/cli-developer/SKILL.md
Use when building CLI tools, implementing argument parsing, or adding interactive prompts. Invoke for parsing flags and subcommands, displaying progress bars and spinners, generating bash/zsh/fish completion scripts, CLI design, shell completions, and cross-platform terminal applications using commander, click, typer, or cobra.
always on
65 tokname + description
once used
979 tokSKILL.md body
bundled files
544 KB
repo stars
12kGitHub
Install the CLI Developer skill
Skills CLI (Claude Code, Codex, Cursor and others)
npx skills add https://github.com/Jeffallan/claude-skills --skill cli-developer
Claude Code, by hand (all projects)
git clone --depth 1 https://github.com/Jeffallan/claude-skills.git /tmp/claude-skills mkdir -p ~/.claude/skills cp -R /tmp/claude-skills/skills/cli-developer ~/.claude/skills/cli-developer
For one project only, copy the folder into .claude/skills/ in that project instead. The agent picks it up when a task matches its description.
What it costs your context
Agent Skills load in three steps. Tokens counted with the o200k tokenizer; your model's count will differ a little.
| When | What loads | Cost |
|---|---|---|
| Every session | Name and description | 65 tok |
| When the agent uses it | The SKILL.md instructions | 979 tok |
| Only if opened | 5 bundled files (44 KB) | varies |
Until it is used, cli-developer costs about 21× less than the median MCP server we measured (1,362 tokens on every turn). Installing all 67 skills from Jeffallan/claude-skills would load 5,798 tokens of descriptions. Skills vs MCP study
Checks
Our checks found nothing to flag: it follows the Agent Skills specification's naming and size guidelines and doesn't pipe downloads into a shell.
Checked 2026-10-22 · method
What's inside
The headings of its SKILL.md. Read the full file on GitHub.
- CLI Developer
- Core Workflow
- Reference Guide
- Quick-Start Example
- Node.js (commander)
- Constraints
- MUST DO
- MUST NOT DO
- Output Templates
- Knowledge Reference
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