h5i AGENTS.md

h5i AGENTS.md is an instructions file for Codex, OpenCode from h5i-dev/h5i. It costs 4 tokens per session, scanned A, original, Apache-2.0.

AGENTS.md instructions for h5i-dev/h5i, a project described as: Secure, auditable browser for AI agents. Pure Rust, no Chromium or V8. 3× faster and 86% less peak memory than headless Chromium.

Instructions file for CodexOpenCode

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add instructions/h5i-dev/h5i/agents-md
Clone the repo
git clone --depth 1 https://github.com/h5i-dev/h5i

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 h5i AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/h5i-dev/h5i/agents-md.svg)](https://agentmods.dev/instructions/h5i-dev/h5i/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/h5i-dev/h5i/agents-md"><img src="https://agentmods.dev/badge/instructions/h5i-dev/h5i/agents-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 4 This file is loaded in full into every session.
When invoked 4 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00004 $0.00004
Opus 5 $0.00002 $0.00002
Sonnet 5 $0.00001 $0.00001
Haiku 4.5 $0.00000 $0.00000

Measured today against content hash 6ebdb617a810, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

h5i 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 today.

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 · 1 lines

What it actually says

CLAUDE.md

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. today First seen · 1 lines · 4 tokens per session scan A 6ebdb617a810

Subscribe to this mod's changes

h5i AGENTS.md is an instructions file published in the GitHub repository h5i-dev/h5i (617 stars, last pushed today), licensed Apache-2.0. It adds 4 tokens to every session, about $0.0000 per session on Opus 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 2026-09-03.