[wild_egg]

It's explained under the July 2025 heading with link to the blog post where it was first shared.

The key bit is right under that though. Ralph is literally just this:

    while :; do cat PROMPT.md | npx --yes @sourcegraph/amp ; done

[mkl]

This is meaningless without knowing the contents of PROMPT.md. The blog post hides the contents of PROMPT.md in a second subscriber-only post (I don't know if the post's 36 minute video explains anything - 33% in it still hasn't).

https://github.com/repomirrorhq/repomirror/blob/main/repomir... (discussed in https://news.ycombinator.com/item?id=45005434) provides a bit more detail, and prompts, but only seems to use the method for porting existing software.

[skybrian]

Thanks!

[msla]

Surely that would be better written as

    cat PROMPT.md | cat | npx --yes @sourcegraph/amp

[wild_egg]

Aside from losing the loop (the whole point of the command), why the double `cat`?

[mkl]

I think it was an attempt at a useless use of cat joke (cat isn't needed at all here, but IMHO helps readability).

[GibbonBreath]

You've removed the loop. This pipeline executes once and then halts.