rune v0.4.0 Architecture: - Lockfile (.claude/rune.lock): records hash + registry_commit per skill, enabling reproducible installs and accurate drift detection - Modified flag detection: sync compares local hash to lockfile, sets pedigree modified=true for imported skills changed locally - Content-based drift direction replaces unreliable mtime comparison - File locking (flock) prevents concurrent cache corruption - Archive etag caching skips redundant tarball downloads - sync --force required to overwrite locally modified skills - add/remove update lockfile immediately New commands and flags: - rune status: combined summary (registries + project + upstream) - rune clean: purge stale cache entries for removed registries - --dry-run global flag on sync/push/update/clean - --message on push for custom commit messages - --force on sync to overwrite local modifications Polish: - Colored output with isatty detection - Safer settings.json handling (backup, better errors) - doctor respects --project flag - 47 tests (up from 17), clippy clean