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/kstonekuan/webskills/agentnpx skills add kstonekuan/webskills --skill agentgit clone --depth 1 https://github.com/kstonekuan/webskillsWrote 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/kstonekuan/webskills/agent)<a href="https://agentmods.dev/skills/kstonekuan/webskills/agent"><img src="https://agentmods.dev/badge/skills/kstonekuan/webskills/agent.svg" alt="Measured on agentmods" 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 | $0.00039 | $0.02025 |
| Opus 5 | $0.00019 | $0.01012 |
| Sonnet 5 | $0.00008 | $0.00405 |
| Haiku 4.5 | $0.00004 | $0.00202 |
Grade A, and why
Agent 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 4d 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 — 187 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent Skills
Product summary
Agent Skills is a lightweight, open format for extending AI agent capabilities with specialized knowledge and workflows. Skills are directories containing a SKILL.md file (YAML frontmatter + Markdown instructions) plus optional supporting files (scripts, references, assets). Use the skills-ref CLI to validate skills and generate prompt XML for agent integration. Primary documentation: https://agentskills.io
When to use
Reach for this skill when:
- Creating a new skill: You need to package domain expertise, repeatable workflows, or new agent capabilities into a reusable format
- Validating skills: You're checking that a skill's SKILL.md file meets format requirements before deployment
- Integrating skills into agents: You're setting up skill discovery, loading metadata, or injecting skills into agent system prompts
- Authoring instructions: You're writing the Markdown body of a skill to guide agent behavior
- Managing skill resources: You're organizing scripts, templates, reference files, or assets alongside skill instructions
Quick reference
SKILL.md frontmatter (required fields)
| Field | Constraints | Example |
|---|---|---|
name |
Max 64 chars, lowercase + hyphens only, no leading/trailing hyphens | pdf-processing |
description |
Max 1024 chars, non-empty, describes what skill does and when to use | Extract text and tables from PDFs, fill forms, merge documents. |
SKILL.md optional frontmatter fields
| Field | Purpose | Example |
|---|---|---|
license |
License name or reference to bundled license file | MIT or licenses/LICENSE.txt |
compatibility |
Environment requirements (max 500 chars) | Requires Python 3.8+, pdfplumber library |
metadata |
Arbitrary key-value pairs for custom properties | author: org-name version: "1.0" |
allowed-tools |
Space-delimited pre-approved tools (experimental) | Bash(git:*) Bash(jq:*) |
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.
- 4d ago First seen · 187 lines · 39 tokens per session scan A ac8cf390397d
Agent is a skill published in the GitHub repository kstonekuan/webskills (8 stars, last pushed 5mo ago), licensed MIT. It adds 39 tokens to every session and 2,025 once invoked, about $0.0002 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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