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 instructions/firstsun-dev/skills/gemini-mdgit clone --depth 1 https://github.com/firstsun-dev/skillsWhat 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 | $0.00593 | $0.00593 |
| Opus 5 | $0.00296 | $0.00296 |
| Sonnet 5 | $0.00119 | $0.00119 |
| Haiku 4.5 | $0.00059 | $0.00059 |
Grade A, and why
skills GEMINI.md 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 2d 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.
The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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.
- 2d ago First seen · 38 lines · 593 tokens per session scan A 2ecaa08945af
skills GEMINI.md is an instructions file published in the GitHub repository firstsun-dev/skills (1 stars, last pushed 2d ago), with no licence file. It adds 593 tokens to every session, about $0.0030 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.
Other instructions, from other repositories
skills AGENTS.md
Instructions for flc1125/skills, covering repository guidelines, project structure & module organization, build, test, and development commands, coding style & naming conventions and testing guidelines.
public-agent-skills AGENTS.md
Instructions for cafe3310/public-agent-skills, a project described as: personal agent skills for better QoL.
paleo AGENTS.md
Instructions for mocasus/paleo, covering paleo, install (open agent skills standard), skills and triggers (plain phrases, no slash commands).
paleo CLAUDE.md
Instructions for mocasus/paleo, covering paleo — repo guidance and token budget (hard rule).
paleo GEMINI.md
Instructions for mocasus/paleo, covering paleo — repo guidance (gemini cli) and token budget (hard rule).
preview-skills CLAUDE.md
Instructions for veelenga/preview-skills, covering code style and adding new examples.