agentmods.dev

DevLab: Instructions file for Codex

AGENTS.md

DevLab AGENTS.md is an instructions file for Codex, OpenCode from ya-labs/DevLab. It costs 3,239 tokens per session, scanned A, original, no licence file.

Repository instructions for DevLab that explain the AI assistant’s role, the project context, expected behaviour, and rules for study documents.

In plain words
What is it for?
They help an AI assistant understand DevLab and handle its study materials according to the repository’s instructions.
Why use it?
They give the assistant the information it needs to work in the repository and follow its most important project-specific rule.

Instructions file for CodexOpenCode

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

This is ya-labs/DevLab's own configuration. It tells Codex and OpenCode how to work on DevLab 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 DevLab configures →

not rated 2repo 2mo ago A scan 3,239 tokens no licence
View source ↗ ya-labs/DevLab
Reuse

Borrowing it

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

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 DevLab AGENTS.md

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

Your own site · 80×15
<a href="https://agentmods.dev/instructions/ya-labs/devlab/agents-md"><img src="https://agentmods.dev/badge/instructions/ya-labs/devlab/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 3,239 This file is loaded in full into every session.
When invoked 3,239 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 $0.03239 $0.03239
Opus 5.5 $0.01296 $0.01296
Sonnet 5.5 $0.00648 $0.00648
Haiku 4.5 $0.00324 $0.00324

Measured 2mo ago against content hash 98be18e091e6, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

DevLab 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 · 478 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

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. 2mo ago First seen · 478 lines · 3,239 tokens per session scan A 98be18e091e6

Subscribe to this mod's changes

DevLab AGENTS.md is an instructions file published in the GitHub repository ya-labs/DevLab (2 stars, last pushed 2mo ago), with no licence file. It adds 3,239 tokens to every session, about $0.0130 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.

Learning and teaching
Related

DevLab AGENTS.md compared with instructions from other repositories

DevLab AGENTS.md next to 6 instructions from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
DevLab AGENTS.mdya-labs/DevLabInstructions file22mo agononeA3,239Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA9,719GitHub Copilot
next.js AGENTS.mdvercel/next.jsInstructions file143ktodayMITA7,461Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA5,649GitHub Copilot
langchain AGENTS.mdlangchain-ai/langchainInstructions file149ktodayMITA4,680Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA3,093GitHub Copilot
vscode model-prompts.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA2,022GitHub Copilot