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YepAPI/skills

Presigned URL uploads, multipart for large files, S3/R2/Supabase Storage.

What is skills?

skills is a Claude Code agent skill that presigned URL uploads, multipart for large files, S3/R2/Supabase Storage.

Works with~Claude Code~Codex CLI~Cursor
npx skills add https://github.com/YepAPI/skills/tree/HEAD/skills/file-uploads
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Open a new chat with this agent skill pre-loaded.

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Documentation

File Uploads

Rules

  • Presigned URLs for direct-to-storage uploads — don't proxy through your server
  • Multipart upload for files > 5MB — chunk into parts, upload in parallel
  • Client-side validation: file type, file size limits — server validates again
  • Image optimization: resize on upload (max 2048px), convert to WebP, strip EXIF
  • Progress tracking: XMLHttpRequest or fetch with ReadableStream for upload progress
  • Storage: S3, R2 (Cloudflare), or Supabase Storage — presigned URL pattern is the same
  • File type validation server-side: check magic bytes, not just file extension
  • Virus scanning for user uploads in high-security contexts

Individual skills in this repo

This repo contains 20 individual skills — each has its own dedicated page.

YepAPI/skills

WCAG 2.1 AA — semantic HTML, keyboard navigation, screen readers.

YepAPI/skills

CRUD generators, data tables, user management, role-based access, and bulk operations.

YepAPI/skills

Tool-use patterns, multi-step reasoning, agent orchestration, and structured outputs.

YepAPI/skills

Chat UI components, streaming responses with AI SDK, context window management, and RAG patterns.

YepAPI/skills

Monitor what ChatGPT and Gemini say about your brand using YepAPI.

YepAPI/skills

Web analytics integration — event tracking, custom dashboards, privacy-first.

YepAPI/skills

Framer Motion — transitions, scroll animations, layout animations.

YepAPI/skills

OpenAPI 3.1 from Zod schemas, interactive docs with Swagger/Scalar, versioning, and example requests for every endpoint.

YepAPI/skills

Authentication security — bcrypt/argon2 hashing, brute force protection, secure password resets.

YepAPI/skills

Session auth, social providers, CSRF protection, and secure cookie patterns.

YepAPI/skills

Queue workers with BullMQ/Inngest/Trigger.dev, job retries, dead letter queues, concurrency.

YepAPI/skills

Link building research and backlink audit using YepAPI.

YepAPI/skills

MDX blog setup, RSS feed generation, sitemap.xml, structured data/JSON-LD, and related posts.

YepAPI/skills

Redis caching, CDN cache headers, stale-while-revalidate, cache invalidation, React Query.

YepAPI/skills

Recharts/Chart.js data visualization — bar, line, area, pie charts.

YepAPI/skills

Commander.js, interactive prompts with Clack, spinners, colors, config files, exit codes, and npm publishing.

YepAPI/skills

cmdk integration, Cmd+K trigger, fuzzy search, grouped actions, keyboard navigation, and dynamic action registration.

YepAPI/skills

Threaded comments, @mentions, reactions, moderation queue, optimistic UI, and cursor pagination.

YepAPI/skills

Competitive analysis between domains using YepAPI.

YepAPI/skills

Experiment setup, variant splitting, statistical significance, and feature flag integration.

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