A frontend development guide for building software interfaces, including components, layouts, responsive behavior, styling, accessibility, and visual states.

Use it to implement or review web interface components, match an existing design, handle loading and error states, and check responsive and accessible behavior.

It helps developers avoid incomplete interfaces that work only in the normal case or fail on different screen sizes and with accessibility tools.

uid — Skill for Claude Code by Everyone-Needs-A-Copilot/claude-copilot

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 Everyone-Needs-A-Copilot/claude-copilot --skill uid

Clone the repo

git clone --depth 1 https://github.com/Everyone-Needs-A-Copilot/claude-copilot

Made for: Claude Code.

Or install claude-copilot, the plugin that ships this one along with the rest of its 73 skills, 18 commands, 16 agents, 6 hooks.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/everyone-needs-a-copilot/claude-copilot/uid/github.svg)](https://agentmods.dev/skills/everyone-needs-a-copilot/claude-copilot/uid)

Your own site

<a href="https://agentmods.dev/skills/everyone-needs-a-copilot/claude-copilot/uid"><img src="https://agentmods.dev/badge/skills/everyone-needs-a-copilot/claude-copilot/uid/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/everyone-needs-a-copilot/claude-copilot/uid"><img src="https://agentmods.dev/badge/skills/everyone-needs-a-copilot/claude-copilot/uid.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 928 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.

Model	Per session	Once invoked
Fable 5.1	$0.00037	$0.00928
Opus 5.5	$0.00015	$0.00371
Sonnet 5.5	$0.00007	$0.00186
Haiku 4.5	$0.00004	$0.00093

Measured 6d ago against content hash 0ed1d512c9a0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

uid 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 6d 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.

plugins/codex-copilot/skills/uid/SKILL.md · 85 lines

How it starts

The opening of the file, as written. The whole thing — 85 lines — stays where its author put it; the contents beside it link to each section on GitHub.

UI Developer

Use this skill to implement polished, accessible UI.

Operating Lens

Follow the repo's component, styling, and state-management patterns.
Preserve the UX/UI design direction, including hierarchy, spacing, product language presentation, and state intent.
Implement complete states, not just the happy path.
Preserve stable dimensions for controls, grids, boards, tiles, and toolbars.
Verify responsive behavior and accessibility.
Keep UI changes scoped to the requested surface.

Workflow

Read 08-taste/INDEX.md from the nearest paths.knowledge_repo entry that has one — resolved tensions from this owner's own feedback, personal tier only, empty until earned. Apply the reasoning, not the example; when a rule does not fit, say so rather than forcing it.
Read the existing UI patterns and the relevant design direction.
Identify component boundaries and data/state inputs.
Implement layout, styling, states, and accessibility behavior.
Run the relevant checks and, for visual work, inspect the rendered result against the design direction.
Hand off to $qa for verification.

Success Criteria

Components preserve UX/UI direction.
All relevant states are implemented.
Responsive and accessibility behavior are verified.
Layout geometry is stable across dynamic content.
Implementation details are stored as a code work product when tc context exists.

Iteration Loop

Implement, render or inspect the result, compare against design intent, fix mismatches, and hand off to $qa.

Methodology

Use component-driven development and accessibility-first UI implementation.

Anti-Generic Rules

Do not implement only the happy path state.
Do not introduce new styling conventions without a reason.
Do not close UI work without responsive and accessibility checks.

Output

Return:

files changed
states implemented
design direction preserved or intentionally changed
verification run
remaining visual or accessibility risks

Read the full file on GitHub · 85 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.

6d ago Changed 0ed1d512c9a0
7d ago Changed · +7 lines f02fb761d215
1mo ago Changed · +12 lines 7ca7b98ea89f
1mo ago First seen · 66 lines · 37 tokens per session scan A 4b6b9c22988f

Subscribe to this mod's changes

uid is a skill published in the GitHub repository Everyone-Needs-A-Copilot/claude-copilot (14 stars, last pushed yesterday), licensed MIT. It adds 37 tokens to every session and 928 once invoked, about $0.0001 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 2026-09-04.

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