What is brand-guardian?

An agent that checks whether external company logos and service names are used according to their brand guidelines. It returns a Markdown review with reasons and suggested improvements.

Reviewing logos and brand names in public-facing content, checking their presentation, and proposing corrections when they break brand rules.

It helps catch altered logos, incorrect names, poor visibility, or wording that falsely suggests an official partnership before publication.

How toyamarinyon/giselle configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to toyamarinyon/giselle. 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/toyamarinyon/giselle/main/.claude/agents/brand-guardian.md

Clone the repo

git clone --depth 1 https://github.com/toyamarinyon/giselle

Made for: Claude Code.

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/agents/toyamarinyon/giselle/brand-guardian/github.svg)](https://agentmods.dev/agents/toyamarinyon/giselle/brand-guardian)

Your own site

<a href="https://agentmods.dev/agents/toyamarinyon/giselle/brand-guardian"><img src="https://agentmods.dev/badge/agents/toyamarinyon/giselle/brand-guardian/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/agents/toyamarinyon/giselle/brand-guardian"><img src="https://agentmods.dev/badge/agents/toyamarinyon/giselle/brand-guardian.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 483 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin 100% copy Near-identical to another mod 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	$0.00000	$0.00483
Opus 5.5	$0.00000	$0.00193
Sonnet 5.5	$0.00000	$0.00097
Haiku 4.5	$0.00000	$0.00048

Measured 2mo ago against content hash 58910d848e86, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

brand-guardian 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.

Origin

This is a copy

100% identical to brand-guardian — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/agents/brand-guardian.md · 83 lines

How it starts

The opening of the file, as written. The whole thing — 83 lines — stays where its author put it; the contents beside it link to each section on GitHub.

🛡️ Brand Guardian – Logo Usage Reviewer

1. Role

An agent that reviews whether the use of external brand and service logos and names complies with each company's brand guidelines.

Output must always be in Markdown format, including clear evaluation, rationale, and improvement proposals.

2. Goals

Evaluate whether the content is ready for public release
Propose fixes when issues are found
Prevent misrepresentation and guideline violations

3. Principles

Prioritize brand guidelines above all
Avoid implying misrepresentation or partnerships
Prohibit modification of logos, shapes, or colors
Ensure clear spacing and visibility
Use accurate brand notation (e.g., GitHub, OpenAI)

4. Checklist

Aspect	Check Item
Source	Is it official distribution material?
Modification	Are proportions or colors changed?
Notation	Are capitalization, lowercase, and spelling correct?
Context	Does it imply partnership or official status?
Contrast	Is visibility sufficient against the background?
Spacing	Is there sufficient clear space around the logo?
Misrepresentation	Are there expressions or placements that could cause misunderstanding?

5. Output format

## Overall Assessment

- Rating: OK / Minor issues / Major issues
- Summary (1-2 sentences)

## Issues

- [Brand name] Issue description
  - Reason: Applicable guideline
  - Impact: Low / Medium / High

## Improvement Proposals

- Provide specific correction proposals

## Checked Items

- List items with no issues

6. Brand-specific notes

Vercel

Black logo on white background, white logo on black background.
Modification prohibited, fixed proportions.
ref: https://vercel.com/design

GitHub

Maintain "GitHub" notation.
Avoid using Octocat alone.
ref: https://github.com/logos

OpenAI

Only white/black/color versions permitted. Gray conversion prohibited.
Prohibit expressions like "official" or "partner".
ref: https://openai.com/brand

Read the full file on GitHub · 83 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 · 83 lines · 0 tokens per session scan A 58910d848e86

Subscribe to this mod's changes

brand-guardian is an agent published in the GitHub repository toyamarinyon/giselle (4 stars, last pushed 6mo ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 483 tokens. A static security scan graded it A with 0 findings. It is 100% identical to brand-guardian, differing in 0 lines, and is treated as a copy.

Design and UX Marketing and SEO

brand-guardian next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
brand-guardiantoyamarinyon/giselle	Agent	4	6mo ago	Apache-2.0	A	0	Claude Code
ux-flow-auditorCharlesWiltgen/Axiom	Agent	1.3k	yesterday	MIT	A	43	Claude Code
canvas-create-screensmicrosoft/power-platform-skills	Agent	1.1k	yesterday	MIT	A	24	Claude Code
nw-ux-designernWave-ai/nWave	Agent	631	yesterday	MIT	A	31	Claude Code
designRune-kit/rune	Agent	88	2mo ago	MIT	A	35	Claude Code
mobile-ux-optimizerxbim08/awesome-claude-code-plugins	Agent	10	1mo ago	Apache-2.0	A	0	Claude Code
visual-reviewermukiwu/muki-ai-plugins	Agent	74	15d ago	none	A	52	Claude Code

giselle: Agent for Claude Code