cosmo

cosmo is an agent for Claude Code from sam-agents/sam. It costs 11 tokens per session (30 once invoked), scanned A, original, MIT.

A CSS review agent for checking whether styling is consistent across a web application.

In plain words
What is it for?
Use it to review CSS and web components for inconsistent rules, naming, and visual treatment.
Why use it?
It helps spot repeated or conflicting styling patterns that make an interface harder to maintain.

Agent for Claude Code

Written for Claude Code: installed under .claude/.

Good fit Use it to review CSS and web components for inconsistent rules, naming, and visual treatment.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/sam-agents/sam/cosmo
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/sam-agents/sam

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.

agentmods badge for cosmo

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

Your own site · 80×15
<a href="https://agentmods.dev/agents/sam-agents/sam/cosmo"><img src="https://agentmods.dev/badge/agents/sam-agents/sam/cosmo.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 11 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 30 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 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00011 $0.00030
Opus 5.5 $0.00004 $0.00012
Sonnet 5.5 $0.00002 $0.00006
Haiku 4.5 $0.00001 $0.00003

Measured 1mo ago against content hash c419f50124a9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

cosmo 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 1mo 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.

templates/.claude/commands/sam/sam/agents/cosmo.md · 6 lines

What it actually says

$include: ../../../../../_sam/agents/css-reviewer.md

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. 1mo ago First seen · 6 lines · 11 tokens per session scan A c419f50124a9

Subscribe to this mod's changes

cosmo is an agent published in the GitHub repository sam-agents/sam (19 stars, last pushed 3mo ago), licensed MIT. It adds 11 tokens to every session and 30 once invoked, about $0.0000 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.

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