What is moddable AGENTS.md?

Project instructions for Moddable, an open-source toolkit for making IoT products with JavaScript on low-cost microcontrollers. They cover setup, building, and running the project.

Use them to set up Moddable, build its tools, and run code for small connected hardware devices.

They explain the project's JavaScript environment and development process so an agent can work with the code correctly.

How Moddable-OpenSource/moddable configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to Moddable-OpenSource/moddable. 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/Moddable-OpenSource/moddable/public/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/Moddable-OpenSource/moddable

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/moddable-opensource/moddable/agents-md/github.svg)](https://agentmods.dev/instructions/moddable-opensource/moddable/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/moddable-opensource/moddable/agents-md"><img src="https://agentmods.dev/badge/instructions/moddable-opensource/moddable/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/moddable-opensource/moddable/agents-md"><img src="https://agentmods.dev/badge/instructions/moddable-opensource/moddable/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 9,743 This file is loaded in full into every session.

When invoked 9,743 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.

Model	Per session	Once invoked
Fable 5.1	$0.09743	$0.09743
Opus 5.5	$0.03897	$0.03897
Sonnet 5.5	$0.01949	$0.01949
Haiku 4.5	$0.00974	$0.00974

Measured 2d ago against content hash 447e35fd73f6, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

moddable 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 2d 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 · 373 lines

The source is not reproduced here

No licence file

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.

2d ago Changed · +1 lines · +290 tokens per session 447e35fd73f6
21d ago Changed · +21 lines · +810 tokens per session 9a7144ddc855
28d ago Changed · +31 lines · +1,076 tokens per session dff5181e3787
2mo ago Changed · +28 lines · +1,019 tokens per session a2986ec8d09b
2mo ago First seen · 292 lines · 6,548 tokens per session scan A b252241d9dff

Subscribe to this mod's changes

moddable AGENTS.md is an instructions file published in the GitHub repository Moddable-OpenSource/moddable (1,569 stars, last pushed 2d ago), with no licence file. It adds 9,743 tokens to every session, about $0.0390 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.

Hardware and IoT

moddable AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
moddable AGENTS.mdModdable-OpenSource/moddable	Instructions file	1.6k	2d ago	none	A	9,743	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

moddable: Instructions file for Codex