dryui-build

dryui-build is a skill for Claude Code, Codex from rob-balfre/dryui. It costs 45 tokens per session (828 once invoked), scanned A, original, MIT.

An experimental layout tool that turns an app screenshot into labelled coloured blocks showing the main page regions and their relative sizes.

In plain words
What is it for?
Use it to sketch dashboards, workspaces, boards, readers, and admin pages from screenshots. It is for layout testing, not working controls or realistic content.
Why use it?
It helps test whether the page structure and visual hierarchy were understood without building a finished interface.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to sketch dashboards, workspaces, boards, readers, and admin pages from screenshots. It is for layout testing, not working controls or realistic content.

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Install with agentmods
npx agentmods add skills/rob-balfre/dryui/v3-proportion-weights
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.

Any agent
npx skills add rob-balfre/dryui --skill v3-proportion-weights
Clone the repo
git clone --depth 1 https://github.com/rob-balfre/dryui

Made for: Claude Code, Codex.

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 dryui-build

README.md
[![agentmods](https://agentmods.dev/badge/skills/rob-balfre/dryui/v3-proportion-weights/github.svg)](https://agentmods.dev/skills/rob-balfre/dryui/v3-proportion-weights)
Your own site
<a href="https://agentmods.dev/skills/rob-balfre/dryui/v3-proportion-weights"><img src="https://agentmods.dev/badge/skills/rob-balfre/dryui/v3-proportion-weights/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 dryui-build

Your own site · 80×15
<a href="https://agentmods.dev/skills/rob-balfre/dryui/v3-proportion-weights"><img src="https://agentmods.dev/badge/skills/rob-balfre/dryui/v3-proportion-weights.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 828 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 $0.00045 $0.00828
Opus 5.5 $0.00018 $0.00331
Sonnet 5.5 $0.00009 $0.00166
Haiku 4.5 $0.00005 $0.00083

Measured 1mo ago against content hash 283635c55018, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

dryui-build 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.

reports/skill-experiments/2026-05-11/batch-6/v3-proportion-weights/SKILL.md · 107 lines

How it starts

The opening of the file, as written. The whole thing — 107 lines — stays where its author put it; the contents beside it link to each section on GitHub.

DryUI Layout Blocks: Proportion Weights

Create only labelled colored layout blocks. The output proves region hierarchy, not finished UI.

Allowed edits:

  • src/routes/+page.svelte
  • src/layout.css

No imports, components, icons, images, charts, tables, forms, buttons, inputs, avatars, or realistic widgets.

Region Weighting

Before coding, classify every visible region:

  • primary: the dominant workspace, board, reader, canvas, or form.
  • secondary: inspector, AI panel, account detail, task detail, help panel.
  • chrome: top bar, nav, rails, tabs, action bar.
  • summary: KPI strips, filters, quick stats.
  • utility: activity, recent updates, footer tools.

The generated layout must preserve these weights:

  • primary is largest at every breakpoint.
  • Desktop primary normally gets minmax(0, 1fr) or larger.
  • secondary is narrower than primary unless the reference shows equal panes.
  • chrome is compact but persistent when visible in the reference.
  • Utility regions must not push the primary workspace below the fold on desktop.

Page Structure

Use exactly one shell:

<main data-layout="<name>-shell">
	<div data-layout-area="page">...</div>
</main>

Use direct semantic child regions with meaningful data-layout-area names.

Layout CSS

Only src/layout.css may contain grid/flex/container rules.

[data-layout='<name>-shell'] {
	container: <name> / inline-size;
}

[data-layout='<name>-shell'] [data-layout-area='page'] {
	display: grid;
	grid-template-areas:
		'topbar'
		'navigation'
		'primary'
		'secondary';
}

@container <name> (min-width: 48rem) {
}
@container <name> (min-width: 72rem) {
}

Container name and query name must match exactly.

Proportion Tools

Use these in src/layout.css when they match the reference:

  • grid-template-columns: minmax(0, 1fr) minmax(14rem, 0.32fr);
  • grid-template-columns: 14rem minmax(0, 1fr) 18rem;
  • grid-template-rows: auto auto minmax(24rem, 1fr) auto;
  • min-block-size on primary reader/board/workspace regions.
  • align-items: stretch for pane layouts.

Read the full file on GitHub · 107 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.

  1. 1mo ago First seen · 107 lines · 45 tokens per session scan A 283635c55018

Subscribe to this mod's changes

dryui-build is a skill published in the GitHub repository rob-balfre/dryui (9 stars, last pushed 5mo ago), licensed MIT. It adds 45 tokens to every session and 828 once invoked, about $0.0002 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 2026-08-31.

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