[     145ms] [INFO] socket open @ http://127.0.0.1:3000/_observablehq/client.js:409
[     145ms] [INFO] ↑ {type: hello, path: /data-flow, hash: 65d089467e79761d21f38f0d7037754c2b71071bc4861c4cce6c927bf4eb4c23} @ http://127.0.0.1:3000/_observablehq/client.js:561
[     166ms] [INFO] ↓ {type: welcome} @ http://127.0.0.1:3000/_observablehq/client.js:415