Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/urmzd/dotfilesnpx agentmods add skills/urmzd/dotfiles/create-oss-skillWrote 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/urmzd/dotfiles/create-oss-skill)<a href="https://agentmods.dev/skills/urmzd/dotfiles/create-oss-skill"><img src="https://agentmods.dev/badge/skills/urmzd/dotfiles/create-oss-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/urmzd/dotfiles/create-oss-skill"><img src="https://agentmods.dev/badge/skills/urmzd/dotfiles/create-oss-skill.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 | $0.00063 | $0.02544 |
| Opus 5.5 | $0.00025 | $0.01018 |
| Sonnet 5.5 | $0.00013 | $0.00509 |
| Haiku 4.5 | $0.00006 | $0.00254 |
Grade A, and why
create-oss-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 — 267 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Create OSS Skill
Create Agent Skills that comply with the agentskills.io spec and follow authoring best practices.
Definition of World-Class
DEFINITION OF WORLD-CLASS (the bar): (1) discoverable+disambiguated by description alone (third-person, real keywords, explicit "Do NOT use for X; use " boundary, co-load relationships stated); (2) least-privilege tools derived from the body (read-only for advice/report skills; scoped Bash globs; report-only skills carry no Write); (3) orthogonal + single-owner (one job; every fact has one owning skill; portable core fenced from portfolio/host specifics); (4) eval-backed (evals/ with should-trigger/should-not-trigger near-misses + output evals on risky paths) -- evals are deferred this pass but state the intent.
Directory Structure
skill-name/
├── SKILL.md # Required: metadata + instructions
├── scripts/ # Optional: executable code
├── references/ # Optional: documentation
├── assets/ # Optional: templates, resources
└── evals/ # Optional: eval test cases
├── evals.json
└── files/
Place skills in skills/<skill-name>/SKILL.md (project-level) or ~/.agents/skills/<skill-name>/SKILL.md (user-level cross-client).
Frontmatter
| Field | Required | Constraints |
|---|---|---|
name |
Yes | 1-64 chars. Lowercase a-z, numbers, hyphens. No leading/trailing/consecutive hyphens. Must match parent directory name. |
description |
Yes | 1-1024 chars. What it does and when to use it. Include trigger keywords. |
license |
No | License name or reference to bundled file. |
compatibility |
No | 1-500 chars. Environment requirements. Only if needed. |
allowed-tools |
No | Space-delimited pre-approved tools. |
metadata |
No | Arbitrary key-value map. |
Quote YAML values containing colons: description: "Use when: the user asks".
Writing Effective Descriptions
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.
- 1mo ago First seen · 267 lines · 63 tokens per session scan A 5a839eb8d636
create-oss-skill is a skill published in the GitHub repository urmzd/dotfiles (5 stars, last pushed yesterday), licensed Apache-2.0. It adds 63 tokens to every session and 2,544 once invoked, about $0.0003 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 2026-08-31.
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