[izacus]

> In terms of data layout, 32-bit vs. 64-bit architecture only really affects pointer size. But Cap'n Proto does not encode native pointers (that obviously wouldn't work), so this turns out not to matter.

Unless you're programming in C or C++ (or using a library from them), where size of int, long, etc. may change depending on architecture and compiler.

[jasonfsmitty]

The integer types are all specifically sized, e.g. int8, int32, etc. Same thing for unsigned integers.

https://capnproto.org/language.html#built-in-types