Redis Array Playground

Simon Willison · Simon Willison · 2026-05-04

(No summary yet for this item — extraction summaries are still backfilling.)

Open original ↗

Appears in

Simon Willison Showcases Claude Code as a Rapid Prototyping Agent

Extraction

Topics: rediswebassemblyinteractive-playgroundagentic-coding

Claims

Salvatore Sanfilippo submitted a PR to Redis adding a new native array data type with over 18 new commands.
Claude Code was used to build a browser-based interactive playground running a WASM-compiled subset of Redis.
The ARGREP command enables server-side regex grep over array values using the TRE library now vendored into Redis.
The playground allows users to experiment with the new array commands without installing anything locally.

Key quotes

The most interesting new command is ARGREP which can run a server-side grep against a range of values in the array using the newly vendored TRE regex library.

I had Claude Code for web build this interactive playground for trying out the new commands in a WASM-compiled build of a subset of Redis running in the browser.