Stream: general

Topic: `buck2` rules for components

Tomasz Andrzejak (Feb 16 2026 at 15:59):

Some time ago I wrote a set of buck2 rules for building wasm components. It provides hermetic toolchains for the full wasm component workflow: compiling Rust/C/C++/JS to core modules, generating WIT bindings (wit-bindgen), creating components (wasm-tools), composing (wac) etc. WIT dependencies are resolved automatically from OCI registries via wkg.

The nice thing about integrating component tooling into a build system like Buck2 is that it understands the full dependency graph -- if you modify just a composition file or a wit interface definition, only the affected downstream targets get rebuilt.

The repo includes examples:

• validator app that builds and compose components from 3 different languages: rust, c++, js
• a port of great p3 http component-interposition demo from @ejrgilbert

https://github.com/andreiltd/wasmono

Last updated: Feb 24 2026 at 04:36 UTC