Playground

Write Ecko and run it here. The real kernel, compiled to WebAssembly in your browser. No install, no API key, no backend.

program

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Tab indents. Press Escape, then Tab or
      Shift+Tab to leave the editor. Runs stop after five seconds.
Mock mode is deterministic, so ai works with no key and
        no network. This tab has no filesystem, no network, and no package imports.
        Install Ecko for the full runtime.