Playground

Write Ecko and run it. The same kernel compiled to WebAssembly, running in this tab - no install, no API key, no backend.

program

output


          

        


        

          1:1
          
        

      


      
Mock mode is deterministic, so ai works with no key and
        no network. There is no filesystem, no network and no package import here -
        install Ecko for that.