agentmods.dev

yantr: Instructions file for Codex

AGENTS.md

yantr AGENTS.md is an instructions file for Codex, OpenCode from besoeasy/yantr. It costs 3,630 tokens per session, scanned A, original, no licence file.

Project-specific instructions for working on yantr, including its app structure and metadata format.

In plain words
What is it for?
Use them when adding or changing yantr apps, especially when editing the x-yantr metadata block or checking work with check.js.
Why use it?
They reduce mistakes by showing which patterns are accepted and which errors make the project checks fail.

Instructions file for CodexOpenCode

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

This is besoeasy/yantr's own configuration. It tells Codex and OpenCode how to work on yantr 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 yantr configures →

not rated 211repo +13 changed 16d ago A scan 3,630 tokens custom licence
View source ↗ besoeasy/yantr yantr.org
Reuse

Borrowing it

Nothing to install: this file belongs to besoeasy/yantr. 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/besoeasy/yantr/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/besoeasy/yantr

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 yantr AGENTS.md

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

Your own site · 80×15
<a href="https://agentmods.dev/instructions/besoeasy/yantr/agents-md"><img src="https://agentmods.dev/badge/instructions/besoeasy/yantr/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 3,630 This file is loaded in full into every session.
When invoked 3,630 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 $0.03630 $0.03630
Opus 5.5 $0.01452 $0.01452
Sonnet 5.5 $0.00726 $0.00726
Haiku 4.5 $0.00363 $0.00363

Measured 16d ago against content hash a809ce0cd91c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

yantr 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 16d 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 · 334 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. 16d ago Changed · +73 lines · +1,111 tokens per session a809ce0cd91c
  2. 18d ago Changed · +39 lines · +398 tokens per session 81e1a945ac1d
  3. 19d ago Changed · +132 lines · +923 tokens per session 4723e73465b0
  4. 20d ago Changed · -41 lines · -1,167 tokens per session scan D → A 39c7064e4bc9
  5. 22d ago Changed · +2 lines · +78 tokens per session a6de941e3762
  6. 25d ago Changed · +13 lines · +520 tokens per session scan A → D 9bf66db015a6
  7. 1mo ago Changed · +40 lines · +810 tokens per session 91cecb7592d4
  8. 1mo ago Changed 7177f777eb0f
  9. 1mo ago Changed · -106 lines · -706 tokens per session f5426295ca53
  10. 1mo ago First seen · 182 lines · 1,663 tokens per session scan A 87c45b1500a8

Subscribe to this mod's changes

yantr AGENTS.md is an instructions file published in the GitHub repository besoeasy/yantr (211 stars, last pushed 8d ago), with no licence file. It adds 3,630 tokens to every session, about $0.0145 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

yantr AGENTS.md compared with instructions from other repositories

yantr AGENTS.md next to 6 instructions from other repositories
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yantr AGENTS.mdbesoeasy/yantrInstructions file2118d agononeA3,630Codex, OpenCode
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next.js AGENTS.mdvercel/next.jsInstructions file143ktodayMITA7,461Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchainInstructions file149kyesterdayMITA4,680Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA5,516GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA3,093GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harnessInstructions file274k2d agoMITA4,313Codex, OpenCode