0.3.0

Features

• Doctor output formats for people and pipelines: --format text (terminal),
  --format markdown (PR descriptions, issues), --format sarif (GitHub code
  scanning, with an action input sarif-file that uploads it) and
  --format baseline (ready-to-paste doctor.ignoreFindings entries)
• --explain <check-id> prints the fix recipe in the terminal;
  --list-checks prints the catalog; typos in --checks/--skip are usage
  errors instead of silently running nothing
• Findings carry a key (the branch, tag, sha, file or PR they are about) and
  doctor.ignoreFindings accepts check-id:key, so one branch or tag can be
  silenced instead of a whole check; gitdoctor baseline flow in SKILL.md
• Five new checks (47 total): changelog-tag-mismatch (latest tag has no
  changelog heading on main), tag-unsigned (opt-in via
  release.signedTags), gh-protection-missing-develop,
  gh-release-missing-for-tag, homebrew-formula-stale
• Homebrew distribution folded into the flow: homebrew.tap/homebrew.formula
  in .gitflow.json, a homebrew-formula step in the release/hotfix finish
  probe, and a playbook that bumps url + sha256 in the tap with one gh api
  call (no clone)
• .gitflow.json JSON Schema (schema/gitflow.schema.json) for editor
  completion; $schema documented in the config reference
• pre-commit framework support (.pre-commit-hooks.yaml → gitdoctor-preflight
  pre-push hook); the hook finds the doctor next to itself in a gitdoctor checkout
• Standalone runs read changelog, release.githubRelease and
  release.signedTags from .gitflow.json (sed fallback), so hooks and the
  action honour them without the agent

Fixes

• Shipped-but-undeleted release/* branches no longer count as open releases
  (hotfix back-merge routing, multiple-release-branches,
  release-develop-drift); orphaned-release-branch gives a local-only
  cleanup hint when origin already dropped the branch
• bash 3.2 (macOS): empty printf -v left variables unset and set -u
  aborted the doctor; caught by the new macOS CI leg

Tests

• Suite grown to 59 scenarios; CI matrix adds macOS (bash 3.2)