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Today I Learned

Daily reflections on work and learning—what I did and what I learned.

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1 entries · #network

2026년 6월

2026-06-30

Direct-Upload Contract, CSS-Token Theming, Hydration Boundaries

Shared principles learned from the 4-step presigned-URL upload, a single generator for @layer-based token theming, and fr layout with post-mount hydration

  • A presigned-URL upload is a 4-step contract of presign→PUT→complete→create, and skipping the complete notification means the backend never registers the upload.
  • CSS-token theming must separate @layer (priority), @scope (scope), and light-dark() (mode), and unify runtime and build CSS under a single generator so they don't diverge.