Playground.Experimental research, not production.

A separate surface from /lab. The lab ships sandboxes that are public, rate-limited, and cost-capped. The playground ships research that may stutter, burn CPU, require WebGPU, or otherwise be honestly imperfect. Every experiment is feature-flag-gated; this index only lists the ones currently enabled.

• Hello, playground

  /playground/hello-playground

  Diagnostic shell — renders the visitor's capability snapshot to verify the experiment-mount contract end-to-end.

  no risk — diagnostic page