Feather is presented by its maker as: "a fresh Tcl reimplementation (WASM, Go)". It was shared on Show HN in 2025, where it received 31 upvotes on Hacker News.
Feather is an embeddable TCL interpreter for adding interactive command shells to any application. Feather Effortlessly add a command shell to your application: for your users, and your agents.
Designed from the ground up to be embedded into host applications. No I/O, no event loop - your host stays in control.
