css-optimization

css-optimization is a cursor rule for Cursor from adobecom/express-milo. It costs 111 tokens per session, scanned A, a copy of css-optimization, Apache-2.0.

A CSS cleanup rule for replacing repeated hardcoded values with existing CSS variables. CSS variables are named values that let a stylesheet reuse the same color, size, or spacing.

In plain words
What is it for?
Use it when optimizing variable usage in CSS files. It compares values with variables already defined in `styles.css`, including font sizes, and only allows semantically matching exact replacements.
Why use it?
It prevents unrelated values from being replaced with the wrong variable and avoids changes when the values do not match exactly.

Cursor rule for Cursor

Written for Cursor: installed under .cursor/.

Good fit Use it when optimizing variable usage in CSS files. It compares values with variables already defined in styles.css, including font sizes, and only allows semantically matching exact replacements.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/adobecom/express-milo/css-optimization
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/adobecom/express-milo

Made for: Cursor.

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 css-optimization

README.md
[![agentmods](https://agentmods.dev/badge/rules/adobecom/express-milo/css-optimization/github.svg)](https://agentmods.dev/rules/adobecom/express-milo/css-optimization)
Your own site
<a href="https://agentmods.dev/rules/adobecom/express-milo/css-optimization"><img src="https://agentmods.dev/badge/rules/adobecom/express-milo/css-optimization/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 css-optimization

Your own site · 80×15
<a href="https://agentmods.dev/rules/adobecom/express-milo/css-optimization"><img src="https://agentmods.dev/badge/rules/adobecom/express-milo/css-optimization.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 111 This file is loaded in full into every session.
When invoked 111 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 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00111 $0.00111
Opus 5.5 $0.00044 $0.00044
Sonnet 5.5 $0.00022 $0.00022
Haiku 4.5 $0.00011 $0.00011

Measured 1mo ago against content hash fb8075770d88, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

css-optimization 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.

Origin

This is a copy

100% identical to css-optimization — 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.

.cursor/rules/css-optimization.mdc · 16 lines

What it actually says

CSS Update Query

When the user asks to optimize variable usage of their files, look at the CSS values that do not use vars. Reference styles.css for existing vars that match the value EXACTLY and ensure that the var name and the value are semantically similar. For example, do not use a spacing variable for font sizes and vice versa. Be sure to check font sizes.

CRITICAL

Do not replace values with variables unless the value matches the varaible EXACTLY.


description: globs: alwaysApply: true

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 · 16 lines · 111 tokens per session scan A fb8075770d88

Subscribe to this mod's changes

css-optimization is a cursor rule published in the GitHub repository adobecom/express-milo (6 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 111 tokens to every session, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to css-optimization, differing in 0 lines, and is treated as a copy.