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livehd: Instructions file for Codex

AGENTS.md

livehd AGENTS.md is an instructions file for Codex, OpenCode from masc-ucsc/livehd. It costs 6,117 tokens per session, scanned A, original, no licence file.

A repository guide for coding agents working on masc-ucsc/livehd. It explains the project’s instruction files, build and test steps, important directories, the tree library, and the lhd command-line tool.

In plain words
What is it for?
Use it when asking an agent to inspect, build, test, or modify the LiveHD codebase, especially its tree library or lhd command-line tool.
Why use it?
It gives an agent the project-specific rules and commands it needs before changing code, reducing guesswork and avoidable mistakes.

Instructions file for CodexOpenCode

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

This is masc-ucsc/livehd's own configuration. It tells Codex and OpenCode how to work on livehd 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 livehd configures →

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is contract) is the [docs site](https://masc-ucsc.github.io/docs/) (`../docs`);.

not rated 255repo +3 changed 3d ago A scan 6,117 tokens custom licence
View source ↗ masc-ucsc/livehd
Reuse

Borrowing it

Nothing to install: this file belongs to masc-ucsc/livehd. 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/masc-ucsc/livehd/master/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/masc-ucsc/livehd

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 livehd AGENTS.md

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

Your own site · 80×15
<a href="https://agentmods.dev/instructions/masc-ucsc/livehd/agents-md"><img src="https://agentmods.dev/badge/instructions/masc-ucsc/livehd/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 6,117 This file is loaded in full into every session.
When invoked 6,117 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 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 5.1 $0.06117 $0.06117
Opus 5.5 $0.02447 $0.02447
Sonnet 5.5 $0.01223 $0.01223
Haiku 4.5 $0.00612 $0.00612

Measured 3d ago against content hash 08a3b29d1f71, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

livehd 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 3d 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 · 291 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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. 3d ago Changed · +24 lines · +350 tokens per session 08a3b29d1f71
  2. 9d ago Changed · +4 lines · +65 tokens per session 7cfedc97a2d5
  3. 11d ago Changed · +2 lines · +30 tokens per session e5c61f167333
  4. 13d ago Changed · +23 lines · +329 tokens per session e3fc5416e23c
  5. 14d ago Changed · +44 tokens per session f84d2beed022
  6. 16d ago Changed · +31 lines · +375 tokens per session 46db85c1baa6
  7. 17d ago Changed · +1 lines · +325 tokens per session dcf50d16c65f
  8. 19d ago Changed · +164 tokens per session 13eaa5936495
  9. 22d ago Changed · +7 lines · +132 tokens per session 3fa17b5fe998
  10. 23d ago First seen · 199 lines · 4,303 tokens per session scan A fae5483b6e8a

Subscribe to this mod's changes

livehd AGENTS.md is an instructions file published in the GitHub repository masc-ucsc/livehd (255 stars, last pushed today), with no licence file. It adds 6,117 tokens to every session, about $0.0245 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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Related

livehd AGENTS.md compared with instructions from other repositories

livehd AGENTS.md next to 6 instructions from other repositories
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livehd AGENTS.mdmasc-ucsc/livehdInstructions file255todaynoneA6,117Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA9,719GitHub Copilot
next.js AGENTS.mdvercel/next.jsInstructions file143kyesterdayMITA7,461Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchainInstructions file149ktodayMITA4,680Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA5,516GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA3,093GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harnessInstructions file275k2d agoMITA4,313Codex, OpenCode