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/alseif0x/rustycore/agents-mdgit clone --depth 1 https://github.com/alseif0x/rustycoreWhat 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 | $0.06325 | $0.06325 |
| Opus 5 | $0.03163 | $0.03163 |
| Sonnet 5 | $0.01265 | $0.01265 |
| Haiku 4.5 | $0.00632 | $0.00632 |
Grade A, and why
rustycore AGENTS.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 · 474 lines · 6,325 tokens per session scan A 45725307bc8f
rustycore AGENTS.md is an instructions file published in the GitHub repository alseif0x/rustycore (21 stars, last pushed 2d ago), with no licence file. It adds 6,325 tokens to every session, about $0.0316 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.
Other instructions, from other repositories
godot-ai AGENTS.md
AGENTS.md instructions for hi-godot/godot-ai, covering agents.md - godot ai, what this project is, architecture, project structure and key conventions.
GameDesignOS AGENTS.md
Instructions for DY-2026/GameDesignOS, covering gamedesignos agent 入口, 默认接法, agent 执行规则, 什么时候用整个项目 and 每个 skill 单独怎么用.
moorestech AGENTS.md
AGENTS.md instructions for moorestech/moorestech, covering コーディングの指針, qa（必須）, 互換性とパフォーマンス, 既知の制約（設計上の割り切り） and regionの活用.
turn-based-game-mcp typescript.instructions.md
TypeScript development patterns and best practices for the turn-based games platform.
summer-engine-agent CLAUDE.md
Instructions for SummerEngine/summer-engine-agent: This file primes Claude Code on Summer when it loads from this repo. The full agent workflow lives in skills/workflow/using-summer/SKILL.md; activate that skill on every fresh session.
fonline-tla copilot-instructions.md
Instructions for cvet/fonline-tla: Follow the repository agent instructions in /AGENTS.md.