SDKs

A handler doesn’t need a library at all. The protocol is line-delimited JSON on stdin and stdout, so any language that can read and write those can play. The SDKs exist to take care of the parts you’d otherwise rewrite each time: framing the records, fetching object bodies over HTTP, decoding the small ones inline, and the pause and sleep handshakes.

There are two so far. They cover the same ground and follow the same walk-the-log, decide, append-one-event shape; pick whichever matches the rest of your stack.

• Go — Writing handlers in Go with the ipc package, plus the lower-level library for reading and writing sessions directly.
• Python — Writing handlers in Python: reading the log, writing outputs, control flow, and events.