Alex Chen
Languages, tools, and the notes between them
I design small languages and the CLIs that keep them honest. Currently at Harbor Labs, previously on the typechecker for a research notebook that got out of hand in the best way.
Now
Building Ink, a typed notebook format for people who write with code sitting next to the sentence. Harbor is the CLI around it — evals, snapshots, and a boringly reliable local workflow.
GitHub
harbor-labs/ink
A typed notebook format. Prose, code, and tests in one file that still diffs like a human wrote it.
GitHub
harbor-labs/harbor
The CLI for Ink: run, snapshot, and compare notebooks without standing up a service.
Types as documentation — Northshore ConfTalk notes and slidesWriting
Occasional notes on type systems that stay out of the way, local-first tools, and why most developer portfolios look like résumé PDFs with extra steps.