Stream: contributing

Topic: History + Improved editing in Roc REPL

Aurélien Geron (Jun 26 2026 at 13:01):

I submitted PR #9823 to activate the history in the repl, and add several keyboard commands.

Here's a quick demo which shows:

• moving the cursor around (start/end of line, move to next/previous word), cutting (until the start/end of line, or the next/previous word) and pasting.
• navigating the history (by typing up/down), even within multiline commands.
• I made an error on purpose in the demo to show a feature I stole from Julia's REPL: when you go back up and replay command N, then press the down key, it selects command N+1, making it very easy to replay multiple consecutive lines.

roc-repl.mov

Aurélien Geron (Jul 27 2026 at 04:29):

@Luke Boswell just merged this PR (thanks!), so y'all can try it out now! :tada:

Last updated: Aug 12 2026 at 12:35 UTC