Borrowing it
Nothing to install: this file belongs to agent-sh/agentsys. 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/agent-sh/agentsys/main/.kiro/skills/enhance-skills/SKILL.mdgit clone --depth 1 https://github.com/agent-sh/agentsysWrote 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/agent-sh/agentsys/enhance-skills)<a href="https://agentmods.dev/skills/agent-sh/agentsys/enhance-skills"><img src="https://agentmods.dev/badge/skills/agent-sh/agentsys/enhance-skills/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/agent-sh/agentsys/enhance-skills"><img src="https://agentmods.dev/badge/skills/agent-sh/agentsys/enhance-skills.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00018 | $0.02575 |
| Opus 5 | $0.00009 | $0.01288 |
| Sonnet 5 | $0.00004 | $0.00515 |
| Haiku 4.5 | $0.00002 | $0.00258 |
Grade A, and why
enhance-skills 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 9d 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 — 437 lines — stays where its author put it; the contents beside it link to each section on GitHub.
enhance-skills
Analyze skill definitions for trigger quality, structure, and discoverability.
Workflow
- Discover - Find all SKILL.md files
- Parse - Extract frontmatter and content
- Check - Run all pattern checks against knowledge below
- Filter - Apply certainty filtering
- Report - Generate markdown output
- Fix - Apply auto-fixes if --fix flag present
Skill Knowledge Reference
Frontmatter Fields (Complete Reference)
| Field | Required | Description | Validation |
|---|---|---|---|
name |
No | Display name, defaults to directory name | lowercase, max 64 chars |
description |
Recommended | What skill does and when to use | max 1024 chars, should include trigger |
argument-hint |
No | Autocomplete hint, e.g., [file-path] |
keep under 30 chars |
disable-model-invocation |
No | true = manual only (for side effects) |
boolean, default false |
user-invocable |
No | false = hidden from / menu (auto-only) |
boolean, default true |
allowed-tools |
No | Tools Claude can use without permission | comma-separated list |
model |
No | Specific model when skill is active | opus, sonnet, haiku |
context |
No | fork = run in isolated subagent context |
fork or omit |
agent |
No | Subagent type for execution | Explore, Plan, general-purpose |
hooks |
No | Skill-scoped lifecycle hooks | PreToolUse, PostToolUse |
Directory Structure
skills/my-skill/
├── SKILL.md # Required - core definition (under 500 lines)
├── reference.md # Optional - detailed documentation
├── examples.md # Optional - usage examples
└── scripts/ # Optional - helper scripts
└── helper.py
Storage Locations:
- Enterprise: Managed settings
- Personal:
~/.claude/skills/<name>/SKILL.md - Project:
.claude/skills/<name>/SKILL.md
Invocation Control Patterns
Manual Only (for skills with side effects):
---
name: deploy
description: Deploy to production
disable-model-invocation: true
---
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.
- 9d ago First seen · 437 lines · 18 tokens per session scan A f65922e18523
enhance-skills is a skill published in the GitHub repository agent-sh/agentsys (984 stars, last pushed 3d ago), licensed MIT. It adds 18 tokens to every session and 2,575 once invoked, about $0.0001 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 2026-08-30.
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