Webdesign

Webdesign is a skill for Claude Code, Codex from danielmiessler/LifeOS. It costs 134 tokens per session (3,969 once invoked), scanned A, original, MIT.

A web interface design and integration skill for creating layouts and connecting them to an existing codebase.

In plain words
What is it for?
Use it for one-off interface work, multi-page prototypes, design-system updates, and frontend implementation.
Why use it?
It helps turn design ideas into working web pages without losing the connection between visual decisions and production code.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: reads .claude/ paths; mentions Claude Code.

Good fit Use it for one-off interface work, multi-page prototypes, design-system updates, and frontend implementation.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/danielmiessler/lifeos/webdesign
About the project

LifeOS is an AI-assisted personal operating system that records a person’s goals, values, context, and current situation to help move them toward a desired future state. It supports work such as building applications, starting businesses, and creative projects. Its catalogue entries extend the system through skills, hooks, agents, and commands.

danielmiessler/LifeOS · 19,534 stars · on GitHub · ourlifeos.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 danielmiessler/LifeOS --skill webdesign
Clone the repo
git clone --depth 1 https://github.com/danielmiessler/LifeOS

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 Webdesign

README.md
[![agentmods](https://agentmods.dev/badge/skills/danielmiessler/lifeos/webdesign/github.svg)](https://agentmods.dev/skills/danielmiessler/lifeos/webdesign)
Your own site
<a href="https://agentmods.dev/skills/danielmiessler/lifeos/webdesign"><img src="https://agentmods.dev/badge/skills/danielmiessler/lifeos/webdesign/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 Webdesign

Your own site · 80×15
<a href="https://agentmods.dev/skills/danielmiessler/lifeos/webdesign"><img src="https://agentmods.dev/badge/skills/danielmiessler/lifeos/webdesign.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 134 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,969 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • Snyk pass 7 Sept 2026
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 2 findings, up to medium

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 →

  • medium Rogue Agent · line 4
    Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.
    Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
  • medium Data Exfiltration · line 11
    Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.
    Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
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 $0.00134 $0.03969
Opus 5.5 $0.00054 $0.01588
Sonnet 5.5 $0.00027 $0.00794
Haiku 4.5 $0.00013 $0.00397

Measured 1mo ago against content hash 73c201e3f912, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

Webdesign scanned grade A with 1 finding 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.

The scan reads SKILL.md. This mod also ships 3 executable files (Tools/DriveClaudeDesign.ts, Tools/ProcessHandoffBundle.ts, Tools/VerifyDesign.ts), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -s -X POST http://localhost:31337/notify \
LifeOS/install/skills/Webdesign/SKILL.md · 199 lines

How it starts

The opening of the file, as written. The whole thing — 199 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Voice Notification (REQUIRED FIRST ACTION)

curl -s -X POST http://localhost:31337/notify \
  -H "Content-Type: application/json" \
  -d '{"message": "Running the Webdesign skill", "voice_enabled": true}' > /dev/null

What It Does

Designs and integrates web interfaces via two paths. ClaudeDesign drives Anthropic's claude.ai/design product through the Interceptor skill, then folds the result into your codebase. DirectDesign writes the design inline using Anthropic's open-source frontend-design philosophy, loaded from a local reference. Default routing: short, ad-hoc, in-codebase work goes to DirectDesign; multi-page or shareable prototypes go to ClaudeDesign.

The Problem

Producing good web UI usually means either fighting a visual tool that can't touch your real codebase, or hand-coding from scratch and landing on the same generic defaults every time. The two failure modes pull in opposite directions: visual-first tools give you polish but a handoff gap, while writing code directly gives you integration but flat aesthetics. This skill gives you both routes under one roof — a visual round-trip through claude.ai/design when review matters, or inline design with a real aesthetic doctrine loaded when speed and in-codebase iteration matter — and routes to the right one based on the ask.

How It Works

Webdesign covers three paths for producing web UI. Pick the path that fits; surface options by name when intent is ambiguous. We always drive whatever version of Claude Design is live — there is no version to pin.

Path 1 — DirectDesign (default workhorse; {{DA_NAME}} writes the design inline)

{{DA_NAME}} writes the design directly with Anthropic's open-source frontend-design aesthetic doctrine loaded inline. The load-bearing prompt content is mirrored from github.com/anthropics/skills/tree/main/skills/frontend-design (MIT-licensed) into References/FrontendDesignPhilosophy.md — register list, anti-default rules, type pair recipes, motion vocabulary, color discipline. Self-contained: no runtime dependency, no browser, no auth. This is the path that has actually shipped every real design this skill has produced. Workflow: DirectDesign.

Read the full file on GitHub · 199 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 · 199 lines · 134 tokens per session scan A 73c201e3f912

Subscribe to this mod's changes

Webdesign is a skill published in the GitHub repository danielmiessler/LifeOS (19,534 stars, last pushed 1mo ago), licensed MIT. It adds 134 tokens to every session and 3,969 once invoked, about $0.0005 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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