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phase-3-mockup

phase-3-mockup is a skill for Claude Code from ww-w-ai/bkit-claude-code. It costs 54 tokens per session (2,080 once invoked), scanned A, original, Apache-2.0.

A UI prototype workflow for building screens with HTML, CSS, and JavaScript before the final application is implemented.

In plain words
What is it for?
It helps create page mockups, basic interactions, simulated API responses, and specifications that can later guide component development.
Why use it?
It lets a team check screen layouts, interactions, and user flows early, using simulated JSON data instead of a working backend.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Part of the bkit plugin — 44 skills, 2 commands, 34 agents, 21 hooks shipped together

not rated 605repo 7d ago A scan SkillSpector: warn 54 tokens original Apache-2.0

Good fit It helps create page mockups, basic interactions, simulated API responses, and specifications that can later guide component development.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ww-w-ai/bkit-claude-code/phase-3-mockup
View source ↗ ww-w-ai/bkit-claude-code bkit.ai
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 ww-w-ai/bkit-claude-code --skill phase-3-mockup
Clone the repo
git clone --depth 1 https://github.com/ww-w-ai/bkit-claude-code

Made for: Claude Code.

Or install bkit, the plugin that ships this one along with the rest of its 44 skills, 2 commands, 34 agents, 21 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.

agentmods badge for phase-3-mockup

README.md
[![agentmods](https://agentmods.dev/badge/skills/ww-w-ai/bkit-claude-code/phase-3-mockup/github.svg)](https://agentmods.dev/skills/ww-w-ai/bkit-claude-code/phase-3-mockup)
Your own site
<a href="https://agentmods.dev/skills/ww-w-ai/bkit-claude-code/phase-3-mockup"><img src="https://agentmods.dev/badge/skills/ww-w-ai/bkit-claude-code/phase-3-mockup/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 phase-3-mockup

Your own site · 80×15
<a href="https://agentmods.dev/skills/ww-w-ai/bkit-claude-code/phase-3-mockup"><img src="https://agentmods.dev/badge/skills/ww-w-ai/bkit-claude-code/phase-3-mockup.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,080 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Prompt Injection · line 164
    Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.
    Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
How audits are shown
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 $0.00054 $0.02080
Opus 5.5 $0.00022 $0.00832
Sonnet 5.5 $0.00011 $0.00416
Haiku 4.5 $0.00005 $0.00208

Measured 2mo ago against content hash 1b3c9cf9409b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

phase-3-mockup 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 2mo 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.

skills/phase-3-mockup/SKILL.md · 339 lines

How it starts

The opening of the file, as written. The whole thing — 339 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Phase 3: Mockup Development

Create trendy UI without a designer + Consider Next.js componentization

Purpose

Quickly validate ideas before actual implementation. Even without a designer, research UI/UX trends to create high-quality prototypes, designed for easy conversion to Next.js components later.

What to Do in This Phase

  1. Screen Mockups: Implement UI with HTML/CSS
  2. Interactions: Implement behavior with basic JavaScript
  3. Data Simulation: Simulate API responses with JSON files
  4. Feature Validation: Test user flows

Deliverables

mockup/
├── pages/          # HTML pages
│   ├── index.html
│   ├── login.html
│   └── ...
├── styles/         # CSS
│   └── main.css
├── scripts/        # JavaScript
│   └── app.js
└── data/           # JSON mock data
    ├── users.json
    └── products.json

docs/02-design/
└── mockup-spec.md  # Mockup specification

PDCA Application

  • Plan: What screens/features to mock up
  • Design: Screen structure, interaction design
  • Do: Implement HTML/CSS/JS
  • Check: Verify feature behavior
  • Act: Apply feedback and proceed to Phase 4

Level-wise Application

Level Application Method
Starter This stage may be the final deliverable
Dynamic For validation before next stages
Enterprise For quick PoC

Core Principles

"Working prototype over perfect code"

- Pure HTML/CSS/JS without frameworks
- JSON files instead of APIs for data simulation
- Fast feedback loops
- Structure considering Next.js componentization

UI/UX Trend Research Methods

Creating Trendy UI Without a Designer

1. Trend Research Sources
Source Purpose URL
Dribbble UI design trends, color palettes dribbble.com
Behance Real project case studies behance.net
Awwwards Latest web trends from award winners awwwards.com
Mobbin Mobile app UI patterns mobbin.com
Godly Landing page references godly.website
Land-book Landing page gallery land-book.com

Read the full file on GitHub · 339 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. 2mo ago First seen · 339 lines · 54 tokens per session scan A 1b3c9cf9409b

Subscribe to this mod's changes

phase-3-mockup is a skill published in the GitHub repository ww-w-ai/bkit-claude-code (605 stars, last pushed 7d ago), licensed Apache-2.0. It adds 54 tokens to every session and 2,080 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 2026-09-03.

CSS and stylingClaude CodeDesign and UXFrontendai-agentsai-native-developmentmulti-languagepdcapipeline
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