Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/klh/speedy-claudenpx agentmods add skills/klh/speedy-claude/lit-devWrote 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/klh/speedy-claude/lit-dev)<a href="https://agentmods.dev/skills/klh/speedy-claude/lit-dev"><img src="https://agentmods.dev/badge/skills/klh/speedy-claude/lit-dev/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/klh/speedy-claude/lit-dev"><img src="https://agentmods.dev/badge/skills/klh/speedy-claude/lit-dev.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- 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 MCP Rug Pull · line 271 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 880 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
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 | $0.00048 | $0.05984 |
| Opus 5.5 | $0.00019 | $0.02394 |
| Sonnet 5.5 | $0.00010 | $0.01197 |
| Haiku 4.5 | $0.00005 | $0.00598 |
Grade A, and why
lit-dev 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- klh-lit-dev — 88% identical, 16 lines differ
How it starts
The opening of the file, as written. The whole thing — 957 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Lit Web Components
Tech Stack
| Tool | Purpose | Version |
|---|---|---|
| Lit | Web component library | Latest (lit) |
| TypeScript | Type-safe development | Latest |
| Zod | Schema validation & type inference | Latest |
| Playwright | E2E/component testing | Latest (@playwright/test) |
| ESLint | Linting | Latest with Lit configs |
| Turborepo | Monorepo build system | Latest |
| pnpm | Package management | Latest (strict peer dependencies) |
Setup commands:
pnpm create turbo@latest # or pnpm init
pnpm add lit zod @playwright/test
pnpm add -D typescript @types/node eslint eslint-plugin-lit
Overview
Lit is a lightweight library (~5KB) for building fast, standards-based web components. At its core: reactive state, scoped styles, and declarative templates via tagged template literals.
Core principle: Every Lit component is a standard web component—interoperable across any framework or vanilla HTML.
Component Structure Pattern
Follow this 7-point pattern for every Lit component:
components/
my-component/
my-component.ts # Component definition
my-component.zod.ts # Zod schemas + TS types
my-component.spec.tsx # Playwright tests
fixtures/
basic.html # Fixture for testing
interactive.html
index.ts # Barrel export
index.ts # Root barrel export
1. Component Directory Structure
Each component gets its own directory under components/:
mkdir -p components/my-component/fixtures
touch components/my-component/my-component.ts
touch components/my-component/my-component.zod.ts
touch components/my-component/my-component.spec.tsx
touch components/my-component/fixtures/basic.html
touch components/my-component/index.ts
What ships with it
1 file 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.
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 Changed · +27 lines f261bb1662bf
- 1mo ago First seen · 930 lines · 48 tokens per session scan A 909492ffbae0
lit-dev is a skill published in the GitHub repository klh/speedy-claude (11 stars, last pushed 28d ago), licensed MIT. It adds 48 tokens to every session and 5,984 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 2026-08-30.
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