[v1.2.1] - 2026-06-19

Fixed

• releasegen validate --require-changelog-entry now folds staged
  index changes into its diff against the base ref. Without this, the
  check was a no-op under pre-commit hooks (e.g. prenup), because HEAD
  is still the parent commit at that moment and a tree-only diff sees
  nothing. Local pre-commit checks now catch missing [Unreleased]
  entries just as reliably as CI does on a pushed commit. Unstaged
  worktree edits and untracked files are deliberately excluded so
  unrelated local dirt (build artifacts, half-finished edits, scratch
  files) cannot cause false failures, and so the changed-file set
  matches what FileAtIndex reads for the next-commit comparison.
• releasegen validate --require-changelog-entry now compares the
  [Unreleased] section as it appears in the git index (the staged
  view of the next commit) rather than the working tree. Previously, a
  developer who edited CHANGELOG.md but forgot to git add it would
  see the pre-commit check pass — the worktree had the new entry — even
  though the commit being created did not, leaving the gap to be caught
  only in CI. The check now predicts the post-commit state correctly:
  unstaged changelog edits no longer satisfy the requirement, and
  git commit -a keeps working because git stages worktree changes
  before pre-commit hooks run.