What is Herdglass AGENTS.md?

A set of project instructions for coding agents working on Herdglass, including its layout, design, technical structure, limits, and user-interface conventions.

It helps agents understand how the Herdglass codebase is organized and how changes should fit its existing architecture and interface.

It gives agents the project context they need and records rules that should not be accidentally broken.

How buldezir/Herdglass configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to buldezir/Herdglass. 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/buldezir/Herdglass/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/buldezir/Herdglass

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/buldezir/herdglass/agents-md/github.svg)](https://agentmods.dev/instructions/buldezir/herdglass/agents-md)

Your own site

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

Per session 19,454 This file is loaded in full into every session.

When invoked 19,454 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	$0.19454	$0.19454
Opus 5.5	$0.07782	$0.07782
Sonnet 5.5	$0.03891	$0.03891
Haiku 4.5	$0.01945	$0.01945

Measured 3d ago against content hash 9e1f8f643e5c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

Herdglass 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 · 398 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, 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.

3d ago Changed · +8 lines · +867 tokens per session 9e1f8f643e5c
4d ago Changed · +4 lines · +333 tokens per session 295498b23251
8d ago Changed · +52 lines · +3,523 tokens per session 0d6066dc61eb
9d ago Changed · +22 lines · +1,318 tokens per session 4738012a1045
1mo ago Changed · +1 lines · +171 tokens per session 8a8030ff6c63
2mo ago Changed · -3 lines · -1,611 tokens per session 26e8f0060b36
2mo ago Changed · +2 lines · +423 tokens per session 1023a8835502
2mo ago First seen · 312 lines · 14,430 tokens per session scan A 2c14b01b740d

Subscribe to this mod's changes

Herdglass AGENTS.md is an instructions file published in the GitHub repository buldezir/Herdglass (22 stars, last pushed 4d ago), licensed AGPL-3.0. It adds 19,454 tokens to every session, about $0.0778 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.

Herdglass AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
Herdglass AGENTS.mdbuldezir/Herdglass	Instructions file	22	4d ago	AGPL-3.0	A	19,454	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	9,719	GitHub Copilot
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,516	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	today	MIT	A	4,680	Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,093	GitHub Copilot
vscode model-prompts.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	2,022	GitHub Copilot

Herdglass: Instructions file for Codex