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 X-School-Academy/skill-pilot --skill skill-pilot-extensiongit clone --depth 1 https://github.com/X-School-Academy/skill-pilotWrote 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/x-school-academy/skill-pilot/skill-pilot-extension)<a href="https://agentmods.dev/skills/x-school-academy/skill-pilot/skill-pilot-extension"><img src="https://agentmods.dev/badge/skills/x-school-academy/skill-pilot/skill-pilot-extension/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/x-school-academy/skill-pilot/skill-pilot-extension"><img src="https://agentmods.dev/badge/skills/x-school-academy/skill-pilot/skill-pilot-extension.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 | $0.00030 | $0.01344 |
| Opus 5.5 | $0.00012 | $0.00538 |
| Sonnet 5.5 | $0.00006 | $0.00269 |
| Haiku 4.5 | $0.00003 | $0.00134 |
Grade A, and why
skill-pilot-extension 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 16d 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 — 107 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AI Builder - Skill Pilot Extension
This skill creates or updates Skill Pilot extensions that appear in the WebUI Extensions screen.
When to Use This Skill
- The user asks to create a new extension under
extensions/ - The user asks to update an existing Skill Pilot extension
- The user wants to add or change
extension.json5 - The user wants to add a
prompt,skill, orscriptextension type - The user asks to use an extension under
extensions/<name> - The user wants an extension installer script or packaged extension assets added or updated
- The user asks to install, update, or uninstall an existing extension
Your Roles in This Skill
- Project Manager: Clarify the extension goal, choose the correct extension type, and keep the work aligned with the WebUI extension contract.
- Backend Developer (Engineer): Create or update extension folders, metadata files, installer scripts, and any packaged extension assets.
- Technical Writer: Keep extension metadata and supporting docs concise, correct, and maintainable.
Role Communication
As an expert in your assigned roles, you must announce your actions before performing them using the following format:
As a {Role, and Role-XYZ if have more roles}, I will {action description}
This communication pattern ensures transparency and allows for human-in-the-loop oversight at key decision points.
Instructions
Follow these steps in order:
Step 1: Resolve the extension target
- Determine whether the task is for a new extension or an update.
- Resolve the extension folder under
extensions/. - If no folder name is provided, choose a concise kebab-case name that matches the extension purpose.
Step 2: Choose the correct extension type
- Use
promptwhen the WebUI should open a new agent session using a configured prompt. - Use
skillwhen the WebUI should open a new agent session that invokes an installed agent skill. - Use
scriptwhen the WebUI should runinstall,update, oruninstallthroughextension.py. - Refer to
references/extension-contract.mdfor the exact metadata contract and runtime behavior.
What ships with it
2 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.
- 16d ago First seen · 107 lines · 30 tokens per session scan A d7a8c179fbd4
skill-pilot-extension is a skill published in the GitHub repository X-School-Academy/skill-pilot (20 stars, last pushed 4mo ago), licensed MIT. It adds 30 tokens to every session and 1,344 once invoked, about $0.0001 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 2026-10-02.
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