hol-guard: Instructions file for Codex

AGENTS.md

hol-guard AGENTS.md is an instructions file for Codex, OpenCode from hashgraph-online/hol-guard. It costs 171 tokens per session, scanned A, original, Apache-2.0.

A code-review instruction for the hol-guard repository. It explains how to apply the 500-line guideline and how to review large JSON files.

In plain words
What is it for?
Use it when reviewing source files and declarative JSON such as fixtures, schemas, manifests, and generated data. It helps distinguish maintainability concerns in code from validity and trust-boundary concerns in data.
Why use it?
It prevents reviewers from requesting that JSON files be split merely because they are long, while still directing them to check those files for correctness, security, and schema problems.

Instructions file for CodexOpenCode

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

This is hashgraph-online/hol-guard's own configuration. It tells Codex and OpenCode how to work on hol-guard 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 hol-guard configures →

Reuse

Borrowing it

Nothing to install: this file belongs to hashgraph-online/hol-guard. 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/hashgraph-online/hol-guard/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/hashgraph-online/hol-guard

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 hol-guard AGENTS.md

README.md
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Your own site
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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 hol-guard AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/hashgraph-online/hol-guard/agents-md"><img src="https://agentmods.dev/badge/instructions/hashgraph-online/hol-guard/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 171 This file is loaded in full into every session.
When invoked 171 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 $0.00171 $0.00171
Opus 5.5 $0.00068 $0.00068
Sonnet 5.5 $0.00034 $0.00034
Haiku 4.5 $0.00017 $0.00017

Measured 11d ago against content hash 335b923529f0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

hol-guard 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 11d 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 · 12 lines

What it actually says

Repository review guidance

File-size review policy

The repository's 500-line maintainability guideline applies to source-code files, not declarative data files.

Do not raise line-count, file-length, "file too large", or split-the-file findings for *.json files. This includes command-extension sources under contributions/command-sources/, portable fixtures under tests/fixtures/, generated JSON, schemas, manifests, contracts, and other declarative JSON.

Large JSON files are expected when they enumerate command matchers, fixtures, schemas, or generated data. Review them for correctness, security, schema validity, duplication, malformed data, trust-boundary mistakes, and unnecessary generated churn, but never require splitting or shrinking them solely because of line count or file size.

Continue applying the 500-line guideline to source code where appropriate.

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. 11d ago First seen · 12 lines · 171 tokens per session scan A 335b923529f0

Subscribe to this mod's changes

hol-guard AGENTS.md is an instructions file published in the GitHub repository hashgraph-online/hol-guard (907 stars, last pushed today), licensed Apache-2.0. It adds 171 tokens to every session, about $0.0007 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 2026-10-05.

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