Borrowing it
Nothing to install: this file belongs to e-t-y-b/etyb-skills. 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/e-t-y-b/etyb-skills/main/AGENTS.mdgit clone --depth 1 https://github.com/e-t-y-b/etyb-skillsWrote 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/e-t-y-b/etyb-skills/agents-md)<a href="https://agentmods.dev/instructions/e-t-y-b/etyb-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/e-t-y-b/etyb-skills/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/e-t-y-b/etyb-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/e-t-y-b/etyb-skills/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 | $0.00757 | $0.00757 |
| Opus 5 | $0.00378 | $0.00378 |
| Sonnet 5 | $0.00151 | $0.00151 |
| Haiku 4.5 | $0.00076 | $0.00076 |
Grade A, and why
etyb-skills 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 10d 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 — 60 lines — stays where its author put it; the contents beside it link to each section on GitHub.
etyb-skills
ETYB is an engineering co-pilot packaged as a single agent skill (/etyb). It acts as a
senior engineering leader for any software situation — code, architecture, debugging,
review, infra, testing, security, performance — by routing internally to specialist roles,
enforcing engineering discipline, and reading currency-stamped vendor knowledge from disk.
Users never invoke a specialist directly; everything routes through the one skill.
Invocation
Invoke explicitly with /etyb, or let it auto-trigger: the skill's description matches
engineering situations (a bug, an architecture question, an X-vs-Y tradeoff, a platform
name in conversation), so agents load it whenever the request has software content.
Tier model
- Tier 0 — trivial: just do it, no ceremony.
- Tier 1 — single-domain: act as one specialist, read that one reference.
- Tier 2 — incident: skip ceremony, triage immediately.
- Tier 3-4 — multi-domain or high-stakes: written plan plus gate sequence.
Repo layout
skills/etyb/— the skill itself;SKILL.mdis the only trigger surface.skills/etyb/core/— orchestration modules (tiering, gates, routing, knowledge currency).skills/etyb/references/specialists/— specialist role references (time-invariant principles).skills/etyb/references/protocols/— always-on engineering protocols.skills/etyb/references/verticals/— business-domain architect references.stacks/<vendor>/— currency-stamped vendor pages; detection via each stack'sSKILL.md, depth from sibling product/role pages withlast_verified_onstamps.docs/plan/— execution plans;docs/— RFCs and architecture docs.
Conventions
- TDD — no production code without a failing test first.
- Verification before claims — evidence, not assertion; verify each step before advancing.
- At most 3 clarifying questions, and only when the answer changes the work.
- Signature footer — every Tier 1-4 response ends with the ETYB signature block.
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.
- 10d ago First seen · 60 lines · 757 tokens per session scan A 5dc7aa150535
etyb-skills AGENTS.md is an instructions file published in the GitHub repository e-t-y-b/etyb-skills (10 stars, last pushed 2mo ago), licensed MIT. It adds 757 tokens to every session, about $0.0038 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.
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