Cause & Effect

Foldkit: An Effect-First Frontend Framework #9

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Devin Jameson joins Cause & Effect to talk about Foldkit, an Effect-first frontend framework inspired by Elm architecture. Devin and Johannes Schickling discuss why Foldkit takes a schema-first approach to frontend state, how it differs from React, how commands model side effects, and why this architecture may be especially useful in the age of AI-assisted coding.


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  • (00:00) - Intro
  • (03:24) - Why build a new frontend framework instead of using React?
  • (08:38) - Elm architecture, model-view-update, and frontend state
  • (19:14) - Schema-first frontend development with Effect
  • (22:37) - Foldkit vs React: components, architecture, and AI-readiness
  • (33:09) - Demo: building a Pixel Art app with Foldkit
  • (01:12:28) - Foldkit’s future: V1, testing, UI, MCP, and the Effect ecosystem
    • ...more
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    Cause & EffectBy Effectful Technologies Inc.