PRs welcome! But please file bugs first and explain the problem or
motivation. For new or changed functionality, strike up a discussion
and get agreement on the design/solution before spending too much time writing
code.

Commit messages should [reference
bugs](https://docs.github.com/en/github/writing-on-github/autolinked-references-and-urls).

We require [Developer Certificate of
Origin](https://en.wikipedia.org/wiki/Developer_Certificate_of_Origin) (DCO)
`Signed-off-by` lines in commits. (`git commit -s`)

Please squash your code review edits & force push. Multiple commits in
a PR are fine, but only if they're each logically separate and all tests pass
at each stage. No fixup commits.

See [commit-messages.md](docs/commit-messages.md) (or skim `git log`) for our commit message style.