$ may end any alternative in a pattern, not only the last

2026-10-01T03:12:15Z

mvzr refuses $ anywhere but at the very end, so /h$|zz/ and Edit ,x/r$|pi/ were bad patterns while /zz|h$/ worked. Its matcher already ends an alternative at .end, so a build-time patch, anchor-checked like the group one, lets $ stand before | and ). The upstream report is in docs/mvzr-group-backtrack.md. Co-Authored-By: Claude Opus 5.5

A repeat inside a regexp group gives back to what follows the group

2026-10-01T03:12:15Z

On aab, /a+ab/ matched but /(a+)ab/ and /(a*)ab/ missed, and so did (.+)_area and ([a-z_]+)_area, in addr, Edit and look alike. mvzr's hasAlt counts a group's own ) as an alternative, so every group with pattern after it takes matchGroup's alternatives branch, which never tries a repeat's shorter matches. No newer mvzr fixes it (trunk is the pinned commit), so the build patches the fetched source as it does the step budget, anchor-checked: when the rest fails after a group, the group's shorter matches are tried, longest first. docs/mvzr-group-backtrack.md is a report for upstream. Co-Authored-By: Claude Opus 5.5

pardes.git/docs/mvzr-group-backtrack.md, branch main

$ may end any alternative in a pattern, not only the last

A repeat inside a regexp group gives back to what follows the group