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Jaksenc/README.md

Jaksen Charles

Design engineer in NYC with a product-design background, building interfaces, developer tools, and AI/eval workflows with a strong eye for interaction quality.

I started in product, visual, and interaction design. Now I am deepening the engineering side in public: learning real codebases, shipping small reviewable changes, writing docs and tests, and turning ambiguous workflows into clearer tools.

Current Focus

  • Design engineering: UI systems, accessibility, interaction quality, and frontend implementation
  • Engineering fundamentals through real open source maintenance work
  • AI/devtools, agent reliability, evals, and local-first research workflows
  • Developer experience for complex tools and workflows

Recent Open Source

  • Vercel AI #15162: added pointer affordance styling to the AI SDK DevTools button primitive.
  • Anthropic Claude Agent SDK Python #951: exported the public EffortLevel type alias and added focused public-export coverage.
  • ZIO Kafka #1694: replaced a flaky sleep in ConsumerSpec with Promise-based coordination.
  • ZIO Kafka #1692: linked the serialization docs to the existing zio-json serde tutorial.
  • BrowserTrace #239: linked share-safe export guidance across integration docs and added metadata test coverage.

Currently In Review

  • StyleX #1665: approved fix for stylex-sort-keys autofix ordering.
  • Vercel Arg #79: numeric parser support for separate negative values while preserving strict option parsing.
  • Vercel NCC #1319: preserve TypeScript imports for ESM output when an ESM package exposes only an import export condition.

Selected Public Work

How I Contribute

  • A designer's eye for clarity, adoption, and interaction details
  • Small, reviewable pull requests with clear scope and validation notes
  • Documentation and tests that reduce maintainer review burden
  • Careful issue selection: maintainer signal, narrow acceptance criteria, and patches that fit the local codebase

Website · GitHub

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  1. folio folio Public

    Portfolio site

    JavaScript

  2. openai/parameter-golf openai/parameter-golf Public

    Train the smallest LM you can that fits in 16MB. Best model wins!

    Python 5k 3.4k

  3. zio/zio-kafka zio/zio-kafka Public

    A fast Kafka client for ZIO and ZIO Streams

    Scala 367 147

  4. aaronlab/browsertrace aaronlab/browsertrace Public

    Local replay debugger for Browser Use failures with screenshots, model I/O, failed-step timelines, and public-safe HTML exports.

    Python 3 23