Borrowing it
Nothing to install: this file belongs to jmxt3/gitscape.ai. 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/jmxt3/gitscape.ai/main/.agents/skills/addyosmani-agent-skills/SKILL.mdgit clone --depth 1 https://github.com/jmxt3/gitscape.aiWrote 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/jmxt3/gitscape.ai/addyosmani-agent-skills)<a href="https://agentmods.dev/skills/jmxt3/gitscape.ai/addyosmani-agent-skills"><img src="https://agentmods.dev/badge/skills/jmxt3/gitscape.ai/addyosmani-agent-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/jmxt3/gitscape.ai/addyosmani-agent-skills"><img src="https://agentmods.dev/badge/skills/jmxt3/gitscape.ai/addyosmani-agent-skills.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 | $0.00059 | $0.00304 |
| Opus 5 | $0.00030 | $0.00152 |
| Sonnet 5 | $0.00012 | $0.00061 |
| Haiku 4.5 | $0.00006 | $0.00030 |
Grade A, and why
addyosmani-agent-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 12d 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.
What it actually says
addyosmani/agent-skills — Code Skill
What this is
Production-grade engineering skills for AI coding agents.
When to use
- Understanding the architecture and module layout of agent-skills
- Locating and calling functions, classes, and methods in its public API
- Extending or modifying behavior consistent with its existing patterns
- Debugging by tracing through its modules
- Setting up, running, or configuring the project
Key concepts
Top-level areas: .agents/, .claude/, .claude-plugin/, .codex-plugin/, .gemini/, .github/, .opencode/, agents/.
Primary languages: Shell, JavaScript.
Quickstart
git clone https://github.com/addyosmani/agent-skills.git
References
Code Access
The full source digest for this repository is available locally:
What ships with it
9 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.
- exporters/addyosmani_agent_skills_adk_skill.py 1.7 KB runs code
- exporters/addyosmani_agent_skills_agno_skill.py 1004 B runs code
- manifest.json 3.2 KB
- references/addyosmani_agent_skills_digest.txt 586 KB
- references/architecture.md 1.4 KB
- references/examples.md 5.7 KB
- references/setup.md 4.1 KB
- scan-report.json 7.6 KB
- scan-report.sarif 43 KB
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.
- 12d ago First seen · 43 lines · 59 tokens per session scan A d9d2075e528c
addyosmani-agent-skills is a skill published in the GitHub repository jmxt3/gitscape.ai (33 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 59 tokens to every session and 304 once invoked, about $0.0003 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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