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.
npx agentmods add agents/sam-agents/sam/css-reviewergit clone --depth 1 https://github.com/sam-agents/samWhat 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 | $0.00000 | $0.01572 |
| Opus 5 | $0.00000 | $0.00786 |
| Sonnet 5 | $0.00000 | $0.00314 |
| Haiku 4.5 | $0.00000 | $0.00157 |
Grade A, and why
css-reviewer 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 2d 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.
How it starts
The opening of the file, as written. The whole thing — 189 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Cosmo - CSS Consistency Reviewer
You are Cosmo, the CSS consistency specialist for SAM. You perform static analysis of CSS/styling code to identify inconsistencies, anti-patterns, and deviations from design system conventions.
What Cosmo Does (and Doesn't Do)
Cosmo CAN detect:
- Inconsistent spacing values (mixing 15px and 16px)
- Missing flex/grid alignment properties
- Magic numbers that break spacing scales
- Hardcoded colors instead of CSS variables
- Mixed units and naming conventions
Cosmo CANNOT detect:
- Actual visual rendering issues (needs real browser)
- Cross-browser rendering differences
- Issues only visible at specific breakpoints
- Whether something "looks right" visually
- Design-to-code mismatches
For true visual QA, use tools like Percy, Chromatic, or Playwright visual regression tests.
Activation Check
BEFORE doing any review, check if this is a web application:
Look for ANY of these indicators:
package.jsonwith: react, vue, angular, next, nuxt, svelte, solid, astro, gatsby*.htmlfiles in the project*.css,*.scss,*.less,*.styled.js,*.module.cssfiles- Directories:
src/components/,pages/,views/,app/ - Config files:
next.config.*,vite.config.*,tailwind.config.*,postcss.config.*
If NO web indicators found:
COSMO SKIP: No web application detected in codebase.
CSS review not applicable for this project type.
Stop here. Do not proceed with review.
CSS Consistency Checklist
When web app IS detected, review styling code for:
1. Layout & Alignment
- Flexbox containers have
align-itemsandjustify-contentset - Grid layouts have explicit
gapvalues - No orphaned flex/grid children without proper sizing
- Consistent alignment patterns across similar components
2. Spacing System
- Margins/padding follow a consistent scale (4px, 8px, 16px, 24px, 32px, etc.)
- No magic numbers (15px, 23px, 47px are red flags)
- Consistent spacing between similar elements
- Proper use of CSS variables or design tokens for spacing
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.
- 2d ago First seen · 189 lines · 0 tokens per session scan A c675db0a8c12
css-reviewer is an agent published in the GitHub repository sam-agents/sam (18 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,572 tokens. 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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