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 agentmods add skills/beel-collab/presets.dev/senior-frontendnpx skills add beel-collab/presets.dev --skill senior-frontendgit clone --depth 1 https://github.com/beel-collab/presets.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/beel-collab/presets.dev/senior-frontend)<a href="https://agentmods.dev/skills/beel-collab/presets.dev/senior-frontend"><img src="https://agentmods.dev/badge/skills/beel-collab/presets.dev/senior-frontend.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00047 | $0.02961 |
| Opus 5 | $0.00023 | $0.01481 |
| Sonnet 5 | $0.00009 | $0.00592 |
| Haiku 4.5 | $0.00005 | $0.00296 |
Grade A, and why
senior-frontend 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 yesterday.
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.
fetch(url) This is a copy
88% identical to senior-frontend — 163 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 497 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Senior Frontend
Frontend development patterns, performance optimization, and automation tools for React/Next.js applications.
When to Use
- Use when scaffolding a new React or Next.js project with TypeScript and Tailwind CSS.
- Use when generating new components or custom hooks.
- Use when analyzing and optimizing bundle sizes for frontend applications.
- Use to implement or review advanced React patterns like Compound Components or Render Props.
- Use to ensure accessibility compliance and implement robust testing strategies.
Table of Contents
- Project Scaffolding
- Component Generation
- Bundle Analysis
- React Patterns
- Next.js Optimization
- Accessibility and Testing
Project Scaffolding
Generate a new Next.js or React project with TypeScript, Tailwind CSS, and best practice configurations.
Workflow: Create New Frontend Project
-
Run the scaffolder with your project name and template:
python scripts/frontend_scaffolder.py my-app --template nextjs -
Add optional features (auth, api, forms, testing, storybook):
python scripts/frontend_scaffolder.py dashboard --template nextjs --features auth,api -
Navigate to the project and install dependencies:
cd my-app && npm install -
Start the development server:
npm run dev
Scaffolder Options
| Option | Description |
|---|---|
--template nextjs |
Next.js 14+ with App Router and Server Components |
--template react |
React + Vite with TypeScript |
--features auth |
Add NextAuth.js authentication |
--features api |
Add React Query + API client |
--features forms |
Add React Hook Form + Zod validation |
--features testing |
Add Vitest + Testing Library |
--dry-run |
Preview files without creating them |
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.
- yesterday First seen · 497 lines · 47 tokens per session scan A 12a9161c6f82
senior-frontend is a skill published in the GitHub repository beel-collab/presets.dev (2 stars, last pushed 4mo ago), licensed MIT. It adds 47 tokens to every session and 2,961 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). It is 88% identical to senior-frontend, differing in 163 lines, and is treated as a copy.
Other skills, from other repositories
skill-creator-primer
You MUST load this skill before the skill-creator skill AND before making ANY change to, or conducting a review of ANY Agent Skill. Triggers include creating, editing, reviewing, or contributing to any part of an Agent Skill (description, frontmatter, body, references, scripts, trigger evals, conflicts, etc).
extract-wisdom
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llm-wiki
Use when building or maintaining a self-contained personal knowledge base (an LLM wiki) in plain markdown. Triggers: ingesting sources into a wiki, querying wiki knowledge, linting wiki health, auditing article claims against their sources, critiquing a wiki source's reasoning, superseding stale knowledge, 'add to…
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home-assistant
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deepeval
Use when discussing or working with DeepEval (the python AI evaluation framework).