arize-skills: Instructions file for Codex

AGENTS.md

arize-skills AGENTS.md is an instructions file for Codex, OpenCode from Arize-ai/arize-skills. It costs 614 tokens per session, scanned A, original, MIT.

A repository instruction file describing how AI-agent skills should be written and checked.

In plain words
What is it for?
Use it when creating or reviewing skill files, supporting reference documents, and automated quality checks.
Why use it?
It keeps skill documentation consistent and easier for agents to load correctly, including rules for file links, references, and size.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md.

This is Arize-ai/arize-skills's own configuration. It tells Codex and OpenCode how to work on arize-skills itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything arize-skills configures →

Reuse

Borrowing it

Nothing to install: this file belongs to Arize-ai/arize-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.

Copy the file
curl -O https://raw.githubusercontent.com/Arize-ai/arize-skills/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/Arize-ai/arize-skills

Made for: Codex, OpenCode.

Wrote 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.

agentmods badge for arize-skills AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/arize-ai/arize-skills/agents-md/github.svg)](https://agentmods.dev/instructions/arize-ai/arize-skills/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/arize-ai/arize-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/arize-ai/arize-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.

agentmods 80×15 button for arize-skills AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/arize-ai/arize-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/arize-ai/arize-skills/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 614 This file is loaded in full into every session.
When invoked 614 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00614 $0.00614
Opus 5.5 $0.00246 $0.00246
Sonnet 5.5 $0.00123 $0.00123
Haiku 4.5 $0.00061 $0.00061

Measured 1mo ago against content hash 67782cdebfbd, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

arize-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 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.

AGENTS.md · 20 lines

How it starts

The opening of the file, as written. The whole thing — 20 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Authoring Guidelines for AI Agents

Skill files are read by AI, not humans

Skill files (SKILL.md, references/, etc.) are loaded as context for AI agents. Follow these rules when editing them, per the Agent Skills specification:

  • Use Markdown links for every file and doc reference — write See [the reference guide](references/REFERENCE.md), not a bare path or URL. This is the syntax in the spec's File references example; standardize on it repo-wide for consistency. Keep the target a relative path from the skill root, one level deep (e.g. references/EXAMPLES.md), and avoid deeply nested reference chains. (Runnable commands and code stay literal — scripts/extract.py in a run instruction, go get …, code blocks — they are commands, not links.)
  • Additional documentation goes in references/ — supplementary docs (e.g., ax-profiles.md, ax-setup.md, EXAMPLES.md) belong in the references/ subdirectory, per the Agent Skills specification.
  • Keep SKILL.md focused — the full body loads on activation; the spec recommends staying under ~5000 tokens / 500 lines and moving detail into references/.

Quality checks

CI (.github/workflows/quality-checks.yml) runs these on every PR. Run the no-Node subset locally with bash scripts/check.sh before pushing:

  • scripts/validate_skills.py — per-skill structure: frontmatter, name (kebab-case, 3–64 chars, matches the folder, unique), description length, declared assets exist and are ≤5 MB, Markdown links with relative targets resolve, SKILL.md ≤500 lines, and a warning for bare doc paths that should be Markdown links (the rule above).
  • scripts/validate_manifests.py — version.txt matches every plugin manifest (release-please keeps them in sync; this proves they never drift) and metadata (name, description, keywords, license, repository) is consistent and within limits.
  • codespell (.codespellrc) and line endings (scripts/check_line_endings.sh) — spelling and LF hygiene.
  • Vally lint (eng/vally-lint.mjs) — @microsoft/vally's static skill lint (spec-compliance + valid references). Needs Node: npm install --no-save @microsoft/[email protected] && node eng/vally-lint.mjs.
  • Plugin install smoke test — claude plugin validate . plus a marketplace add/install of the plugin.

Read the full file on GitHub · 20 lines

Changes

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.

  1. 1mo ago First seen · 20 lines · 614 tokens per session scan A 67782cdebfbd

Subscribe to this mod's changes

arize-skills AGENTS.md is an instructions file published in the GitHub repository Arize-ai/arize-skills (67 stars, last pushed 4d ago), licensed MIT. It adds 614 tokens to every session, about $0.0025 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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