New command to inspect what changed in public beads since the last release — without reaching for git directly.
bead diff # summary table of all changed public beads
bead diff <slug> # detailed view for one bead
The summary shows the change type per bead: new, body, frontmatter-only, or both. The detail view lists each changed frontmatter key with its old and new value, then shows a unified body diff. The status key is excluded from frontmatter diffs since it is authoritative in the filename, not the frontmatter.