Borrowing it
Nothing to install: this file belongs to probabl-ai/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/probabl-ai/skills/main/AGENTS.mdgit clone --depth 1 https://github.com/probabl-ai/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/probabl-ai/skills/agents-md)<a href="https://agentmods.dev/instructions/probabl-ai/skills/agents-md"><img src="https://agentmods.dev/badge/instructions/probabl-ai/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/probabl-ai/skills/agents-md"><img src="https://agentmods.dev/badge/instructions/probabl-ai/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 | $0.01050 | $0.01050 |
| Opus 5.5 | $0.00420 | $0.00420 |
| Sonnet 5.5 | $0.00210 | $0.00210 |
| Haiku 4.5 | $0.00105 | $0.00105 |
Grade A, and why
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 17d 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 — 113 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS
Applies repo-wide.
Workflow
- Read the closest
AGENTS.mdfor the area you touch. - Before committing, run the
linttask frompixi.toml:pixi run -e lint lint. That ispre-commit run --all-files(ruff, mypy, typos, and the other hooks in.pre-commit-config.yaml). Do not callpre-commit,ruff, ormypydirectly, and do not use theruffbinary from thetest-py311environment. - Run relevant tests locally before opening a PR.
- PR title:
type(scope): Imperative summary. All CI checks must pass before merge. - Avoid redundant comments that restate what obvious code already expresses.
Documentation
Ship documentation updates in the same PR as user- or contributor-visible changes:
- Update
README.mdwhen changing workflow packs, default install behavior, breaking or deprecated catalog ids, or model and harness claims. - Update
tools/README.mdoreval/README.mdwhen changing Pixi tasks, version sources, eval authoring, or CI expectations. - Keep a skill's
.catalog.jsonsummaryaligned with itsSKILL.mddescription and the README skill overview. - When
skills/*/SKILL.mdchanges required behavior, updateeval/<skill>/prompts.mdand regenerateskills/<skill>/evals/evals.json.
Run pixi run check after changing catalog, skill, plugin, Pixi, or eval
metadata.
Coding Discipline
1. Think Before Coding
Don't assume. Don't hide confusion. Surface tradeoffs.
- State assumptions explicitly. If uncertain, ask.
- If multiple interpretations exist, present them — don't pick silently.
- If a simpler approach exists, say so. Push back when warranted.
- If something is unclear, stop. Name what's confusing. Ask.
2. Simplicity First
Minimum code that solves the problem. Nothing speculative.
- No features, abstractions, or configurability beyond what was asked.
- No error handling for impossible scenarios.
- If you write 200 lines and it could be 50, rewrite it.
Ask yourself: "Would a senior engineer say this is overcomplicated?" If yes, simplify.
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.
- 17d ago Changed · +8 lines · +93 tokens per session fc34a8c6cf7f
- 26d ago Changed · +21 lines · +281 tokens per session fc4aaa4a1ed5
- 27d ago First seen · 84 lines · 676 tokens per session scan A d4516a4de6d7
skills AGENTS.md is an instructions file published in the GitHub repository probabl-ai/skills (140 stars, last pushed 9d ago), licensed BSD-3-Clause. It adds 1,050 tokens to every session, about $0.0042 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 2026-09-26.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
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AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
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