> the capn proto tool page doesn't seem to document how the text format works (or at least I couldn't find any examples). It looks more like a diagnostic tool,

> the capn proto tool page doesn't seem to document how the text format works (or at least I couldn't find any examples). It looks more like a diagnostic tool, not a first-class citizen. Cap'n Proto's text format works pretty much exactly like Protobuf's. You can use it in all the same ways.