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 Gen-Verse/PAST-Bench --skill create-skillgit clone --depth 1 https://github.com/Gen-Verse/PAST-BenchWrote 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/gen-verse/past-bench/create-skill)<a href="https://agentmods.dev/skills/gen-verse/past-bench/create-skill"><img src="https://agentmods.dev/badge/skills/gen-verse/past-bench/create-skill/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/gen-verse/past-bench/create-skill"><img src="https://agentmods.dev/badge/skills/gen-verse/past-bench/create-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, 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 Agent Snooping · line 265 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 | $0.00033 | $0.01592 |
| Opus 5.5 | $0.00013 | $0.00637 |
| Sonnet 5.5 | $0.00007 | $0.00318 |
| Haiku 4.5 | $0.00003 | $0.00159 |
Grade A, and why
create-skill 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 — 288 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Create Skill Wizard
This skill helps you create new Agent Zero skills that follow the SKILL.md standard.
Quick Start
To create a new skill, I'll guide you through these steps:
- Name & Purpose - What should this skill do?
- Trigger Patterns - When should this skill activate?
- Content Structure - What instructions should the agent follow?
- Supporting Files - Any scripts or templates needed?
SKILL.md Format
Every skill needs a SKILL.md file with YAML frontmatter:
---
name: "skill-name"
description: "Clear description of what this skill does and when to use it"
version: "1.0.0"
author: "Your Name"
tags: ["category1", "category2"]
trigger_patterns:
- "keyword1"
- "phrase that triggers this"
---
# Skill Title
Your skill instructions go here...
Required Fields
| Field | Description | Example |
|---|---|---|
name |
Unique identifier (lowercase, hyphens) | "code-review" |
description |
When/why to use this skill | "Review code for quality and security issues" |
Optional Fields
| Field | Description | Example |
|---|---|---|
version |
Semantic version | "1.0.0" |
author |
Creator name | "Jane Developer" |
tags |
Categorization keywords | ["review", "quality"] |
trigger_patterns |
Words/phrases that activate skill | ["review", "check code"] |
allowed_tools |
Tools this skill can use | ["code_execution", "web_search"] |
Skill Directory Structure
/a0/usr/skills/
└── my-skill/
├── SKILL.md # Required: Main skill file
├── scripts/ # Optional: Helper scripts
│ ├── helper.py
│ └── process.sh
├── templates/ # Optional: Templates
│ └── output.md
└── docs/ # Optional: Additional docs
└── examples.md
Writing Good Skill Instructions
Be Specific and Actionable
# Good
When reviewing code:
1. Check for security vulnerabilities
2. Verify error handling
3. Assess test coverage
# Bad
Review the code and make it better.
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 · 288 lines · 33 tokens per session scan A 55f81fc1d575
create-skill is a skill published in the GitHub repository Gen-Verse/PAST-Bench (35 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 33 tokens to every session and 1,592 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 2026-08-30.
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