# feat: add a type inferRouterFunctions<AppRouter>
docs: include an inference helper in documentation
📚 documentation / examples
bug: TRPC's inferred mutation input type is incorrect when used with zod4's preprocess
👻 invalid🐛 bug: unconfirmed⏳ close if no activity
`inferProcedureInput` broken in published package
🐛 bug🧙🏻 typescript wizardry