Suggestion

[cbn-falias]

trafficstars

What about those two? https://github.com/gristlabs/ts-interface-builder https://github.com/gristlabs/ts-interface-checker

[marcj]

Not a great solution if you ask me. It adds a substantial amount of additional runtime code that makes the emitted JS much bigger, slower, and costs more memory. I'd prefer a solution that has almost zero runtime performance impact and only generates load when you actually access the type information.