agentmods.dev

agentfill: Instructions file for Codex

AGENTS.md

agentfill AGENTS.md is an instructions file for Codex, OpenCode from nevir/agentfill. It costs 676 tokens per session, scanned A, original, BlueOak-1.0.0.

Project instructions for agentfill, covering its documentation, tests, pre-commit checklist, and the steps required after changing files in its source directory.

In plain words
What is it for?
Use them when working on agentfill's documentation or source files and when preparing changes for commit.
Why use it?
The supplied information is too limited to explain the project's purpose or exact capabilities in more detail.

Instructions file for CodexOpenCode

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

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

not rated 19repo 8mo ago A scan 676 tokens BlueOak-1.0.0
View source ↗ nevir/agentfill agentfill.dev
Reuse

Borrowing it

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

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 agentfill AGENTS.md

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

Your own site · 80×15
<a href="https://agentmods.dev/instructions/nevir/agentfill/agents-md"><img src="https://agentmods.dev/badge/instructions/nevir/agentfill/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 676 This file is loaded in full into every session.
When invoked 676 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 $0.00676 $0.00676
Opus 5.5 $0.00270 $0.00270
Sonnet 5.5 $0.00135 $0.00135
Haiku 4.5 $0.00068 $0.00068

Measured 2mo ago against content hash 2be2069844af, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

agentfill 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 · 70 lines

The source is not reproduced here

Licensed BlueOak-1.0.0

The repository is licensed BlueOak-1.0.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

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 · 70 lines · 676 tokens per session scan A 2be2069844af

Subscribe to this mod's changes

agentfill AGENTS.md is an instructions file published in the GitHub repository nevir/agentfill (19 stars, last pushed 8mo ago), licensed BlueOak-1.0.0. It adds 676 tokens to every session, about $0.0027 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.

Related

agentfill AGENTS.md compared with instructions from other repositories

agentfill AGENTS.md next to 6 instructions from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
agentfill AGENTS.mdnevir/agentfillInstructions file198mo agoBlueOak-1.0.0A676Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA9,719GitHub Copilot
next.js AGENTS.mdvercel/next.jsInstructions file143kyesterdayMITA7,461Codex, 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