What is Brand-building-skills AGENTS.md?

Repository instructions for a collection of AI-agent skills following the Agent Skills specification. They describe the skill folders, marketplace files, naming rules, and manual validation command.

Use them when creating, editing, validating, or organising skills and marketplace metadata.

They make the expected skill format and checks clear, reducing errors when adding or reviewing skills in a repository that also acts as a Claude Code marketplace.

How arnabbagxd/Brand-building-skills configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to arnabbagxd/Brand-building-skills. 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/arnabbagxd/Brand-building-skills/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/arnabbagxd/Brand-building-skills

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/arnabbagxd/brand-building-skills/agents-md/github.svg)](https://agentmods.dev/instructions/arnabbagxd/brand-building-skills/agents-md)

Your own site

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

Per session 701 This file is loaded in full into every session.

When invoked 701 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 original 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	$0.00701	$0.00701
Opus 5.5	$0.00280	$0.00280
Sonnet 5.5	$0.00140	$0.00140
Haiku 4.5	$0.00070	$0.00070

Measured 2mo ago against content hash 57f5e9abd02a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

Brand-building-skills 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 · 101 lines

How it starts

The opening of the file, as written. The whole thing — 101 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Guidelines for AI agents working in this repository.

Repository Overview

This repository contains Agent Skills for AI agents following the Agent Skills specification. Skills install to .agents/skills/ (the cross-agent standard). This repo also serves as a Claude Code plugin marketplace via .claude-plugin/marketplace.json.

Name: Brand Building Skills
GitHub: brand-building-skills
License: MIT

Repository Structure

brand-building-skills/
├── .claude-plugin/
│   └── marketplace.json   # Claude Code plugin marketplace manifest
├── skills/                # Agent Skills
│   └── skill-name/
│       ├── SKILL.md       # Required skill file
│       ├── evals/
│       │   └── evals.json
│       └── references/    # Optional reference docs
├── CONTRIBUTING.md
├── LICENSE
└── README.md

Build / Lint / Test Commands

Skills are content-only (no build step). Verify manually:

YAML frontmatter is valid
name field matches directory name exactly
name is 1-64 chars, lowercase alphanumeric and hyphens only
description is 1-1024 characters

Run the validation script:

bash validate-skills.sh

Agent Skills Specification

Skills follow the Agent Skills spec.

Skill File Format

---
name: skill-name          # Required. Must match directory name.
description: When to...   # Required. 1-1024 chars. Include trigger phrases.
metadata:
  version: 1.0.0
---

# Skill Title

Instructions for the agent...

Required Fields

Field	Rules
`name`	1-64 chars, lowercase a-z, 0-9, hyphens only. Must match directory.
`description`	1-1024 chars. Include trigger phrases for agent detection.

Optional Fields

Field	Notes
`license`	Defaults to MIT
`metadata`	author, version, etc.

Skill Structure

Read the full file on GitHub · 101 lines

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.

2mo ago First seen · 101 lines · 701 tokens per session scan A 57f5e9abd02a

Subscribe to this mod's changes

Brand-building-skills AGENTS.md is an instructions file published in the GitHub repository arnabbagxd/Brand-building-skills (839 stars, last pushed 4mo ago), licensed MIT. It adds 701 tokens to every session, about $0.0028 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.

brand-architecture brand-audit brand-guidelines brand-identity brand-launch brand-messaging

Brand-building-skills AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
Brand-building-skills AGENTS.mdarnabbagxd/Brand-building-skills	Instructions file	839	4mo ago	MIT	A	701	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	today	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

Brand-building-skills: Instructions file for Codex