Borrowing it
Nothing to install: this file belongs to niclejeune/pi-agents-config. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/niclejeune/pi-agents-config/main/.pi/agent/skills/skill-creator/SKILL.mdgit clone --depth 1 https://github.com/niclejeune/pi-agents-configWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/niclejeune/pi-agents-config/skill-creator)<a href="https://agentmods.dev/skills/niclejeune/pi-agents-config/skill-creator"><img src="https://agentmods.dev/badge/skills/niclejeune/pi-agents-config/skill-creator/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/niclejeune/pi-agents-config/skill-creator"><img src="https://agentmods.dev/badge/skills/niclejeune/pi-agents-config/skill-creator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What 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 5.1 | $0.00067 | $0.02533 |
| Opus 5 | $0.00034 | $0.01267 |
| Sonnet 5 | $0.00013 | $0.00507 |
| Haiku 4.5 | $0.00007 | $0.00253 |
Grade B, and why
skill-creator scanned grade B with 1 finding 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 10d 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.
Unrestricted tool accessmediumExcessive agency
A wildcard tool grant or "run any command" leaves no least-privilege boundary at all.
- `allowed-tools` — comma-separated list (e.g., `Read, Grep, Glob, Bash`); omit to allow all tools This is a copy
100% identical to skill-creator — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 285 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Create a New Skill
Guide the user through creating a new agent skill following the Agent Skills specification. Follow each step in order.
Step 1: Understand the Skill
Gather requirements before writing anything.
Ask the user:
- What should this skill do? (one sentence)
- When should an agent use it? (trigger phrases users would say)
- What tools does the skill need? (Read, Grep, Glob, Bash, Task, WebFetch, etc.)
- Where should the skill live? (which plugin or directory)
Determine the skill name:
- Lowercase letters, digits, and hyphens only (
a-z,0-9,-) - 1-64 characters; must not start or end with
-; no consecutive hyphens (--) - Descriptive and unique among existing skills
- Prefer action-oriented names:
processing-pdfs,fix-issue,code-review - Check the target skills directory to avoid name collisions
Choose a complexity tier:
| Tier | Structure | Use When |
|---|---|---|
| Simple | SKILL.md only |
Self-contained instructions under ~200 lines |
| With references | SKILL.md + references/ |
Domain knowledge that agents load conditionally |
| With scripts | SKILL.md + scripts/ |
Workflow automation needing Python scripts |
| Full | All of the above | Complex skills with automation and domain knowledge |
Read ${CLAUDE_SKILL_ROOT}/references/design-principles.md for guidance on keeping skills focused and concise.
Step 2: Plan the Skill
Analyze how each use case would be executed from scratch. Identify what reusable resources would help when executing these tasks repeatedly.
For each concrete example, ask:
- What code would be rewritten every time? → candidate for
scripts/ - What documentation is needed to inform decisions? → candidate for
references/ - What templates or assets are used in output? → candidate for
assets/
Example analysis:
- "Rotate a PDF" → rotating requires rewriting the same code →
scripts/rotate_pdf.py - "Query BigQuery metrics" → need table schemas each time →
references/schema.md - "Build a frontend app" → same boilerplate HTML/React →
assets/hello-world/
What ships with it
6 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.
- 10d ago First seen · 285 lines · 67 tokens per session scan B 93b543a0514f
skill-creator is a skill published in the GitHub repository niclejeune/pi-agents-config (1 stars, last pushed 4mo ago), licensed MIT. It adds 67 tokens to every session and 2,533 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 1 finding (unrestricted tool access). It is 100% identical to skill-creator, differing in 0 lines, and is treated as a copy.
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