What is tack AGENTS.md?

A set of instructions for the tack project that explains how to read the file, separates the configuration repository from the tack repository, and records settled decisions and sources of truth.

Use it to understand repository boundaries, follow existing decisions, and locate authoritative information.

It prevents agents from editing the wrong repository or reopening decisions that have already been made.

How agoodkind/tack configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to agoodkind/tack. 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/agoodkind/tack/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/agoodkind/tack

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/agoodkind/tack/agents-md/github.svg)](https://agentmods.dev/instructions/agoodkind/tack/agents-md)

Your own site

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

Per session 5,026 This file is loaded in full into every session.

When invoked 5,026 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	$0.05026	$0.05026
Opus 5.5	$0.02010	$0.02010
Sonnet 5.5	$0.01005	$0.01005
Haiku 4.5	$0.00503	$0.00503

Measured yesterday against content hash 2867a88d924a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

tack 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 yesterday.

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 · 379 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.

yesterday Changed · -5 lines · -76 tokens per session 2867a88d924a
8d ago Changed · +46 lines · +560 tokens per session 5f214fceed45
15d ago Changed · +1 lines · +16 tokens per session 60b0b73d59db
20d ago Changed · +2 tokens per session 3a69ec400015
1mo ago Changed · +6 lines · +114 tokens per session 9eb5e5089399
1mo ago Changed · -8 tokens per session a5a217daf265
1mo ago Changed · +7 lines · +105 tokens per session b89ad90b4d18
1mo ago Changed · +2 lines · +33 tokens per session 8246fb6646d9
2mo ago Changed · +4 lines · +71 tokens per session 0928168122e8
2mo ago First seen · 318 lines · 4,209 tokens per session scan A a67ab6573a1b

Subscribe to this mod's changes

tack AGENTS.md is an instructions file published in the GitHub repository agoodkind/tack (1 stars, last pushed today), with no licence file. It adds 5,026 tokens to every session, about $0.0201 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.

tack AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
tack AGENTS.mdagoodkind/tack	Instructions file	1	today	none	A	5,026	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	yesterday	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

tack: Instructions file for Codex