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 skills add tmustier/pi-extensions --skill skill-creatorgit clone --depth 1 https://github.com/tmustier/pi-extensionsWrote 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/tmustier/pi-extensions/skill-creator)<a href="https://agentmods.dev/skills/tmustier/pi-extensions/skill-creator"><img src="https://agentmods.dev/badge/skills/tmustier/pi-extensions/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/tmustier/pi-extensions/skill-creator"><img src="https://agentmods.dev/badge/skills/tmustier/pi-extensions/skill-creator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Rogue Agent · line 3 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
- medium Agent Snooping · line 49 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
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 | $0.00054 | $0.01154 |
| Opus 5.5 | $0.00022 | $0.00462 |
| Sonnet 5.5 | $0.00011 | $0.00231 |
| Haiku 4.5 | $0.00005 | $0.00115 |
Grade A, and why
skill-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 1mo 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 — 131 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Skill Creator
Provide guidance for creating effective Agent Skills that Pi and other compatible agent clients can load. Use Agent Skill / Agent Skills terminology, and keep Pi-specific discovery or packaging notes clearly scoped to Pi.
Agent Skills format (Pi-compatible)
- Required frontmatter:
name,description. Directory name must equalname. - Name rules: 1–64 chars, lowercase letters/digits/hyphens, no leading/trailing/consecutive hyphens.
- Optional frontmatter:
license,compatibility,metadata(arbitrary key-value pairs for tooling),allowed-tools(experimental; support varies by client). disable-model-invocation: when set, Pi will not auto-trigger the skill; the user must invoke it explicitly with/skill:name.- Paths are relative to the skill directory;
{baseDir}placeholders are not supported. - Pi loads Agent Skills from
~/.pi/agent/skills/,~/.agents/skills/,.pi/skills/,.agents/skills/, packageskillsentries, settingsskills, or--skill <path>.
Recommended structure
agent-skill/
├── SKILL.md
├── README.md # Optional: human summary + installation
├── scripts/ # Optional executables
├── references/ # Optional docs loaded on demand
└── assets/ # Optional templates/assets
Workflow
1) Clarify use cases
2–4 concrete example requests usually suffice to scope triggers and functionality.
2) Plan reusable resources
For each example, decide if you need:
- scripts/ for deterministic tasks
- references/ for long docs or schemas
- assets/ for templates or boilerplate
3) Create the skeleton
An Agent Skill needs a directory containing a SKILL.md. Only add resource sub-directories that are actually needed.
mkdir -p ~/.pi/agent/skills/my-skill
touch ~/.pi/agent/skills/my-skill/SKILL.md
Use .agents/skills/ when you want the same skill directory to be naturally discoverable by other Agent Skills-compatible clients too.
4) Optional: Write README.md (humans + installation)
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.
- 1mo ago First seen · 131 lines · 54 tokens per session scan A e5cb7e48a0f1
skill-creator is a skill published in the GitHub repository tmustier/pi-extensions (495 stars, last pushed today), licensed MIT. It adds 54 tokens to every session and 1,154 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-08-30.
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