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.
git clone --depth 1 https://github.com/dcloudio/uni-ai-xWrote 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.
[](https://agentmods.dev/rules/dcloudio/uni-ai-x/ucss)<a href="https://agentmods.dev/rules/dcloudio/uni-ai-x/ucss"><img src="https://agentmods.dev/badge/rules/dcloudio/uni-ai-x/ucss/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.
<a href="https://agentmods.dev/rules/dcloudio/uni-ai-x/ucss"><img src="https://agentmods.dev/badge/rules/dcloudio/uni-ai-x/ucss.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00493 | $0.00493 |
| Opus 5.5 | $0.00197 | $0.00197 |
| Sonnet 5.5 | $0.00099 | $0.00099 |
| Haiku 4.5 | $0.00049 | $0.00049 |
Grade A, and why
ucss 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.
What it actually says
Layout Specifications
- Disable layout such as float, grid, etc., all containers must use display:flex, and the default direction is vertical (implemented via flex-direction:column)
- Page-level scrolling requires manual wrapping, and it is recommended to use conditional compilation on Android
Selector Restrictions
- Only class selectors (.class) are supported, ID/attribute selectors are prohibited (e.g.#id,[attr])
- Class names must comply with the [A-Za-z0 -9_-]+ specification, and special characters are prohibited (such as @class)
Style isolation rules
- The text style (color, font-size) must be written in the component, and the container component () prohibits setting text-related properties
- Disable inheritance-related keywords such as inherit and unset
Hierarchy Control
z-index only takes effect on sibling nodes at the same level, and absolute fixed bits that are separated from the document stream do not support hierarchical coverage
Module Support List
| support module | disable feature | alternative |
|---|---|---|
| Flex layout | Grid/Float | Use Nested Flex for complex layouts |
| Background and border | background picture | Implemented through components |
| Animation and Transition | CSS animation | Use JavaScript API to achieve dynamic effects |
| variable system | CSS variables | Inject global variables through UTS |
| responsive | media queries | Processing using conditional compilation instructions |
Code review priorities
- Forbidden! important (only allowed in class selector)
- Avoid multiple layers of nesting (recommended depth ≤3 layers)
- Priority is given to rpx units (1rpx=0.5 physical pixels)
- Unusable style: position:fixed (use absolute+top:env(safe-area-inset-top) instead)
- Inavailable attribute: opacity:0.5 (use background:rgba(0,0,0,0.5))
- Not available writing:text (needs to be rewritten totext)
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.
- 1mo ago First seen · 37 lines · 493 tokens per session scan A 6b6fe2e6da7b
ucss is a cursor rule published in the GitHub repository dcloudio/uni-ai-x (86 stars, last pushed 2d ago), licensed Apache-2.0. It adds 493 tokens to every session, about $0.0020 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 2026-09-01.
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