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.
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.
npx skills add danielmiessler/LifeOS --skill webdesigngit clone --depth 1 https://github.com/danielmiessler/LifeOSWrote 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/skills/danielmiessler/lifeos/webdesign)<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.
<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>- Snyk pass
- NVIDIA SkillSpector warn
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.
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 | $0.00134 | $0.03969 |
| Opus 5.5 | $0.00054 | $0.01588 |
| Sonnet 5.5 | $0.00027 | $0.00794 |
| Haiku 4.5 | $0.00013 | $0.00397 |
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.
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 \ 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.
What ships with it
19 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- LICENSE.txt 1.1 KB
- README.md 2.5 KB
- References/ClaudeDesignCapabilities.md 6.7 KB
- References/ExportFormats.md 5.7 KB
- References/FrontendDesignPhilosophy.md 14 KB
- References/HandoffBundleSpec.md 6.8 KB
- References/InputFormats.md 7.1 KB
- Tools/DriveClaudeDesign.ts 8.0 KB runs code
- Tools/ProcessHandoffBundle.ts 6.1 KB runs code
- Tools/VerifyDesign.ts 6.6 KB runs code
- Workflows/CreatePrototype.md 4.0 KB
- Workflows/DeployDesign.md 3.4 KB
- Workflows/DirectDesign.md 6.7 KB
- Workflows/ExportToCode.md 4.8 KB
- Workflows/ExtractDesignSystem.md 5.4 KB
- Workflows/IntegrateIntoApp.md 6.9 KB
- Workflows/NativeDesignSync.md 4.0 KB
- Workflows/RefinePrototype.md 4.0 KB
- Workflows/WebsiteToRedesign.md 4.1 KB
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 · 199 lines · 134 tokens per session scan A 73c201e3f912
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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