Borrowing it
Nothing to install: this file belongs to machinavitalis/jaxonomy. 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/machinavitalis/jaxonomy/main/AGENTS.mdgit clone --depth 1 https://github.com/machinavitalis/jaxonomyWrote 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/machinavitalis/jaxonomy/agents-md)<a href="https://agentmods.dev/instructions/machinavitalis/jaxonomy/agents-md"><img src="https://agentmods.dev/badge/instructions/machinavitalis/jaxonomy/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/machinavitalis/jaxonomy/agents-md"><img src="https://agentmods.dev/badge/instructions/machinavitalis/jaxonomy/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 | $0.02244 | $0.02244 |
| Opus 5.5 | $0.00898 | $0.00898 |
| Sonnet 5.5 | $0.00449 | $0.00449 |
| Haiku 4.5 | $0.00224 | $0.00224 |
Grade A, and why
jaxonomy 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 1mo 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 — 147 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md — Jaxonomy
Agent bootstrap and operational notes, for any coding agent (Claude Code,
Codex, Gemini, Cursor, …) and human contributors. This is the canonical,
tool-neutral entry file; CLAUDE.md, GEMINI.md,
.github/copilot-instructions.md, and CONVENTIONS.md are symlinks to it, and
.cursor/rules/ points here (see "Entry points" at the end).
Two doors, depending on what you're here to do:
- Modifying / adding code in Jaxonomy → follow the read order below,
starting at
AGENTS/README.md. Full project orientation lives inAGENTS/; come back here for the things that specifically save agent time. - Using Jaxonomy's public API in your own code (authoring a tutorial,
building a demo, writing a downstream library) → read
SKILL.md, the consumer operating manual, instead.
Read first
AGENTS/README.md— navigation + which AGENTS file to use when.AGENTS/CONTEXT.md— what Jaxonomy is, design philosophy, key abstractions.AGENTS/PATTERNS.md— coding conventions (npavsjnp,LeafSystemcallback signatures, NamedTuple state, test patterns, naming).AGENTS/DECISIONS.md— ADRs; check before re-litigating a settled choice.AGENTS/RULES.md— operating principles, shippable-surface rule, claims/gaps discipline, self-improvement loop.
For a pure usage session (author a tutorial, build a demo, exercise the public
API), SKILL.md is the better starting point.
Operating discipline (pointers, not a second copy)
The substance lives in two files; this bootstrap defers to them rather than restating them:
AGENTS/RULES.md— the four operating principles (think before coding; simplest implementation that fits; surgical changes only; define success then loop), the shippable-surface rule + adversarial-review pass, claims/gaps discipline, and the self-improvement loop. Read it once.AGENTS/README.md— session protocol, branching/commits, scope discipline, and the autonomy/escalation list.
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.
- 1mo ago First seen · 147 lines · 2,244 tokens per session scan A a3b7579f8f6a
jaxonomy AGENTS.md is an instructions file published in the GitHub repository machinavitalis/jaxonomy (21 stars, last pushed 2mo ago), licensed MIT. It adds 2,244 tokens to every session, about $0.0090 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 2026-08-30.
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Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
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AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.