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Flow storage

File storage - uploads, CDN, blobs. Use when handling files.

install
source · Clone the upstream repo
git clone https://github.com/SylphxAI/flow
Claude Code · Install into ~/.claude/skills/
T=$(mktemp -d) && git clone --depth=1 https://github.com/SylphxAI/flow "$T" && mkdir -p ~/.claude/skills && cp -r "$T/.claude/skills/storage" ~/.claude/skills/sylphxai-flow-storage && rm -rf "$T"
manifest: .claude/skills/storage/SKILL.md
source content

Storage Guideline

Tech Stack

  • Storage: Vercel Blob
  • Platform: Vercel

Non-Negotiables

  • Uploads must be intent-based and server-verified (no direct client uploads to permanent storage)
  • Server must validate blob ownership before attaching to resources
  • Abandoned uploads must be cleanable

Context

File uploads are a common attack vector. Users upload things you don't expect. Files live longer than you plan. Storage costs accumulate quietly. A well-designed upload system is secure, efficient, and maintainable.

Consider: what could a malicious user upload? What happens to files when the referencing entity is deleted? How does storage cost scale with usage?

Driving Questions

  • What could a malicious user do through the upload flow?
  • What happens to orphaned files when entities are deleted?
  • How much are we spending on storage, and is it efficient?
  • What file types do we accept, and should we?
  • How do we handle upload failures gracefully?
  • What content validation exists (type, size, safety)?