Borrowing it
Nothing to install: this file belongs to uthumany/uthy-legacy-os. 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/uthumany/uthy-legacy-os/main/AGENTS.mdgit clone --depth 1 https://github.com/uthumany/uthy-legacy-osWrote 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/instructions/uthumany/uthy-legacy-os/agents-md)<a href="https://agentmods.dev/instructions/uthumany/uthy-legacy-os/agents-md"><img src="https://agentmods.dev/badge/instructions/uthumany/uthy-legacy-os/agents-md/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/instructions/uthumany/uthy-legacy-os/agents-md"><img src="https://agentmods.dev/badge/instructions/uthumany/uthy-legacy-os/agents-md.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 | $0.00302 | $0.00302 |
| Opus 5.5 | $0.00121 | $0.00121 |
| Sonnet 5.5 | $0.00060 | $0.00060 |
| Haiku 4.5 | $0.00030 | $0.00030 |
Grade A, and why
uthy-legacy-os 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 2mo 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
AGENTS.md — Uthy Legacy OS
Repo Overview
Open-source library of 30 product management skills + 4 guided workflows for AI coding agents (Claude Code, Cursor, Codex, Gemini CLI, Copilot, etc.). Each skill is a SKILL.md file with YAML frontmatter.
Project Structure
skills/<phase>/<skill-name>/SKILL.md— individual skillsworkflows/<name>/SKILL.md— multi-skill orchestration workflowstemplates/— reusable document templatessamples/— realistic sample outputsdocs/— documentation site (GitHub Pages)scripts/— validation and release tooling
Conventions
- Every skill must have
name,description,version,authorin YAML frontmatter namemust match parent folder namedescriptionmax 1024 chars- Skills must include: Overview, When to Use, Instructions, Pitfalls
- Templates must have clear
{{placeholder}}markers - All .md files use UTF-8, LF line endings
Validation
Run before committing: python scripts/validate-skills.py
PR Guidelines
- One skill per PR unless they're related
- Include validation output in PR description
- Reference the skill phase in PR title:
[discovery] Add customer-interviews skill - Update skill-catalog.md if adding a new skill
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.
- 2mo ago First seen · 30 lines · 302 tokens per session scan A 04187685daab
uthy-legacy-os AGENTS.md is an instructions file published in the GitHub repository uthumany/uthy-legacy-os (5 stars, last pushed 5mo ago), licensed MIT. It adds 302 tokens to every session, about $0.0012 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.
uthy-legacy-os AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| uthy-legacy-os AGENTS.mduthumany/uthy-legacy-os | Instructions file | 5 | 5mo ago | MIT | A | 302 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,516 | GitHub Copilot |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | today | MIT | A | 4,680 | Codex, OpenCode |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 275k | 3d ago | MIT | A | 4,313 | Codex, OpenCode |