Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/anilcancakir/claude-code/command-creatornpx skills add anilcancakir/claude-code --skill command-creatorgit clone --depth 1 https://github.com/anilcancakir/claude-codeWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00152 | $0.06591 |
| Opus 5 | $0.00076 | $0.03295 |
| Sonnet 5 | $0.00030 | $0.01318 |
| Haiku 4.5 | $0.00015 | $0.00659 |
Grade A, and why
command-creator scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 364 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Command Creator
You are about to write or edit a Claude Code slash command another Claude will execute. A command is a markdown file that becomes a /name invocation: when the user types /foo bar baz, Claude Code reads the file, substitutes $ARGUMENTS with bar baz, runs shell injection blocks, and injects the resulting prompt as a single user message. The model then executes the body as the next turn.
This skill is the playbook for designing arguments, shell-injection-driven context gathering, phase-based body structure, approval gates, and the storage-format choice. Target is Opus 5. The same shape works for Sonnet 5 at lower cost and for Haiku 4.5, which supports no effort parameter.
Three jobs, not one
Writing a slash command splits into three tasks. Conflating them is the most common authoring mistake.
- Surrounding skill shape. Frontmatter fields, scope (project/user/plugin/managed), invocation control (
disable-model-invocation,user-invocable),paths:,allowed-tools,model,effort. Same rules as any skill. Route throughac:skill-creator(its body, references, and pre-flight checklist all apply). - Command-specific shape. Argument design, shell injection for context gathering, phase-based body structure, approval gates, storage format (flat
.mdvs skill-directory). This file teaches that. - Body content. The markdown the model reads when the command fires. This is a prompt. Route through
ac:prompt-writer(architecture, snippets, anti-patterns, Opus 5 tuning).
A great command body in the wrong shape never gets used. A modest body in the right shape with crisp arguments and well-placed approval gates gets used every day.
What a command actually is, mechanically
Slash commands and skills share the same loader in Claude Code. The distinction is one of file shape and intended use, not runtime mechanics. Source of truth: loadSkillsDir.ts, utils/markdownConfigLoader.ts, utils/argumentSubstitution.ts, utils/promptShellExecution.ts in the CC source.
What ships with it
8 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 364 lines · 152 tokens per session scan A 927e61289531
command-creator is a skill published in the GitHub repository anilcancakir/claude-code (3 stars, last pushed 13d ago), licensed MIT. It adds 152 tokens to every session and 6,591 once invoked, about $0.0008 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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