harness-engineering-audit: Instructions file for Codex

AGENTS.md

harness-engineering-audit AGENTS.md is an instructions file for Codex, OpenCode from ryne2010/harness-engineering-audit. It costs 288 tokens per session, scanned A, original, MIT.

Repository instructions for maintaining the harness-engineering-audit Codex skill, including its files, rules, checks, and documentation.

In plain words
What is it for?
Use them when changing or validating this skill, especially before running its validation checks or updating installation and usage guidance.
Why use it?
They give contributors a shared map of the project and prevent the skill, its plugin copy, tests, and documentation from drifting apart.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions AGENTS.md; mentions Codex.

This is ryne2010/harness-engineering-audit's own configuration. It tells Codex and OpenCode how to work on harness-engineering-audit 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 harness-engineering-audit configures →

Reuse

Borrowing it

Nothing to install: this file belongs to ryne2010/harness-engineering-audit. 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/ryne2010/harness-engineering-audit/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/ryne2010/harness-engineering-audit

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 harness-engineering-audit AGENTS.md

README.md
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Your own site
<a href="https://agentmods.dev/instructions/ryne2010/harness-engineering-audit/agents-md"><img src="https://agentmods.dev/badge/instructions/ryne2010/harness-engineering-audit/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 harness-engineering-audit AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/ryne2010/harness-engineering-audit/agents-md"><img src="https://agentmods.dev/badge/instructions/ryne2010/harness-engineering-audit/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 288 This file is loaded in full into every session.
When invoked 288 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 $0.00288 $0.00288
Opus 5.5 $0.00115 $0.00115
Sonnet 5.5 $0.00058 $0.00058
Haiku 4.5 $0.00029 $0.00029

Measured 2mo ago against content hash 17f6454b0084, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

harness-engineering-audit 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.

AGENTS.md · 38 lines

What it actually says

AGENTS.md

This repo packages the harness-engineering-audit Codex skill.

Operating Map

  • Source skill payload: skills/harness-engineering-audit/
  • Plugin mirror payload: plugins/harness-engineering-audit/skills/harness-engineering-audit/
  • Smoke test: tests/smoke/run_skill_smoke.py
  • Mirror parity check: tests/check_skill_mirror.py
  • User docs: README.md and docs/
  • Generated audit output: .codex/reports/harness-engineering-audit/

Development Rules

  • Keep the source skill and plugin mirror in sync.
  • Do not add dependencies for validation or packaging unless explicitly requested.
  • Keep audit mode report-only; setup modes must remain explicit and bounded.
  • Keep user-scope and project-scope install examples distinct.
  • Prefer small, reversible patches over broad rewrites.

Validation

Run before claiming completion:

make validate

make validate compiles Python scripts, checks plugin mirror parity, and runs the smoke suite.

Docs Authority

  • docs/README.md is the docs index.
  • docs/USAGE.md is the user workflow reference.
  • docs/INSTALL.md is the install/update reference.
  • docs/HARNESS_ENGINEERING_SOURCE_SYNTHESIS.md records source concepts and synthesis.
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. 2mo ago First seen · 38 lines · 288 tokens per session scan A 17f6454b0084

Subscribe to this mod's changes

harness-engineering-audit AGENTS.md is an instructions file published in the GitHub repository ryne2010/harness-engineering-audit (5 stars, last pushed 2mo ago), licensed MIT. It adds 288 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.

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