diff --git a/bump_version.sh b/bump_version.sh
index b10ea61..c06a17a 100755
--- a/bump_version.sh
+++ b/bump_version.sh
@@ -9,7 +9,7 @@ message="$2"
 # Fail if the branch is dirty.
 git diff --exit-code
 
-echo "$version" > "$ROSE_ROOT/rose_core/.version"
+echo "$version" > "$ROSE_ROOT/rose_lib/.version"
 git add .
 git commit -am "[Release] v$version - $message"
 git tag "$version" HEAD -m "v$version"
diff --git a/conftest.py b/conftest.py
index 584f0f2..7c33175 100644
--- a/conftest.py
+++ b/conftest.py
@@ -9,10 +9,10 @@
 import pytest
 from click.testing import CliRunner
 
-from rose_core.cache import CACHE_SCHEMA_PATH, process_string_for_fts, update_cache
-from rose_core.common import VERSION
-from rose_core.config import Config
-from rose_core.templates import PathTemplateConfig
+from rose_lib.cache import CACHE_SCHEMA_PATH, process_string_for_fts, update_cache
+from rose_lib.common import VERSION
+from rose_lib.config import Config
+from rose_lib.templates import PathTemplateConfig
 
 logger = logging.getLogger(__name__)
 
diff --git a/flake.nix b/flake.nix
index 7359aa2..9560b95 100644
--- a/flake.nix
+++ b/flake.nix
@@ -78,7 +78,7 @@
       packages = rec {
         rose = python.pkgs.buildPythonPackage {
           pname = "rose";
-          version = nixpkgs.lib.strings.removeSuffix "\n" (builtins.readFile ./rose_core/.version);
+          version = nixpkgs.lib.strings.removeSuffix "\n" (builtins.readFile ./rose_lib/.version);
           src = ./.;
           propagatedBuildInputs = prod-deps;
           doCheck = false;
diff --git a/rose_cli/__init__.py b/rose_cli/__init__.py
new file mode 100644
index 0000000..b4ec019
--- /dev/null
+++ b/rose_cli/__init__.py
@@ -0,0 +1,3 @@
+from rose_lib import initialize_logging
+
+initialize_logging()
diff --git a/rose_core/__main__.py b/rose_cli/__main__.py
similarity index 78%
rename from rose_core/__main__.py
rename to rose_cli/__main__.py
index ca00148..5b692f9 100644
--- a/rose_core/__main__.py
+++ b/rose_cli/__main__.py
@@ -2,8 +2,8 @@
 
 import click
 
-from rose_core.cli import cli
-from rose_core.common import RoseExpectedError
+from rose_cli.cli import cli
+from rose_lib import RoseExpectedError
 
 
 def main() -> None:
diff --git a/rose_core/cli.py b/rose_cli/cli.py
similarity index 88%
rename from rose_core/cli.py
rename to rose_cli/cli.py
index 7b55cb4..be8e5a2 100644
--- a/rose_core/cli.py
+++ b/rose_cli/cli.py
@@ -8,14 +8,15 @@
 import os
 import signal
 import subprocess
+import uuid
 from dataclasses import dataclass
 from multiprocessing import Process
 from pathlib import Path
 
 import click
 
-from rose_core.common import VERSION, RoseExpectedError
-from rose_core.config import Config
+from rose_lib.common import VERSION, RoseExpectedError
+from rose_lib.config import Config
 
 logger = logging.getLogger(__name__)
 
@@ -43,7 +44,7 @@ class Context:
 @click.pass_context
 def cli(cc: click.Context, verbose: bool, config: Path | None = None) -> None:
     """A music manager with a virtual filesystem."""
-    from rose_core.cache import maybe_invalidate_cache_database
+    from rose_lib.cache import maybe_invalidate_cache_database
 
     cc.obj = Context(
         config=Config.parse(config_path_override=config),
@@ -76,7 +77,7 @@ def generate_completion(shell: str) -> None:
 @click.pass_obj
 def preview_templates(ctx: Context) -> None:
     """Preview the configured path templates with sample data."""
-    from rose_core.templates import preview_path_templates
+    from rose_lib.templates import preview_path_templates
 
     preview_path_templates(ctx.config)
 
@@ -91,7 +92,7 @@ def cache() -> None:
 @click.pass_obj
 def update(ctx: Context, force: bool) -> None:
     """Synchronize the read cache with new changes in the source directory."""
-    from rose_core.cache import update_cache
+    from rose_lib.cache import update_cache
 
     update_cache(ctx.config, force)
 
@@ -101,7 +102,7 @@ def update(ctx: Context, force: bool) -> None:
 @click.pass_obj
 def watch(ctx: Context, foreground: bool) -> None:
     """Start a watchdog to auto-update the cache when the source directory changes."""
-    from rose_core.watcher import start_watchdog
+    from rose_lib.watcher import start_watchdog
 
     if not foreground:
         daemonize(pid_path=ctx.config.watchdog_pid_path)
@@ -136,8 +137,8 @@ def fs() -> None:
 @click.pass_obj
 def mount(ctx: Context, foreground: bool) -> None:
     """Mount the virtual filesystem."""
-    from rose_core.cache import update_cache
-    from rose_core.virtualfs import mount_virtualfs
+    from rose_lib.cache import update_cache
+    from rose_vfs import mount_virtualfs
 
     if not foreground:
         daemonize()
@@ -157,7 +158,7 @@ def mount(ctx: Context, foreground: bool) -> None:
 @click.pass_obj
 def unmount(ctx: Context) -> None:
     """Unmount the virtual filesystem."""
-    from rose_core.virtualfs import unmount_virtualfs
+    from rose_vfs import unmount_virtualfs
 
     unmount_virtualfs(ctx.config)
 
@@ -173,7 +174,7 @@ def releases() -> None:
 @click.pass_obj
 def print_release(ctx: Context, release: str) -> None:
     """Print a single release (in JSON). Accepts a release's UUID/path."""
-    from rose_core.releases import dump_release
+    from rose_lib.releases import dump_release
 
     release = parse_release_argument(release)
     click.echo(dump_release(ctx.config, release))
@@ -184,8 +185,8 @@ def print_release(ctx: Context, release: str) -> None:
 @click.pass_obj
 def print_all_releases(ctx: Context, matcher: str | None) -> None:
     """Print all releases (in JSON). Accepts an optional rules matcher to filter the releases."""
-    from rose_core.releases import dump_all_releases
-    from rose_core.rule_parser import MetadataMatcher
+    from rose_lib.releases import dump_all_releases
+    from rose_lib.rule_parser import MetadataMatcher
 
     parsed_matcher = MetadataMatcher.parse(matcher) if matcher else None
     click.echo(dump_all_releases(ctx.config, parsed_matcher))
@@ -197,7 +198,7 @@ def print_all_releases(ctx: Context, matcher: str | None) -> None:
 @click.pass_obj
 def edit_release(ctx: Context, release: str, resume: Path | None) -> None:
     """Edit a release's metadata in $EDITOR. Accepts a release's UUID/path."""
-    from rose_core.releases import edit_release
+    from rose_lib.releases import edit_release
 
     release = parse_release_argument(release)
     edit_release(ctx.config, release, resume_file=resume)
@@ -208,7 +209,7 @@ def edit_release(ctx: Context, release: str, resume: Path | None) -> None:
 @click.pass_obj
 def toggle_new(ctx: Context, release: str) -> None:
     """Toggle a release's "new"-ness. Accepts a release's UUID/path."""
-    from rose_core.releases import toggle_release_new
+    from rose_lib.releases import toggle_release_new
 
     release = parse_release_argument(release)
     toggle_release_new(ctx.config, release)
@@ -222,7 +223,7 @@ def delete_release(ctx: Context, release: str) -> None:
     Delete a release from the library. The release is moved to the trash bin, following the
     freedesktop spec. Accepts a release's UUID/path.
     """
-    from rose_core.releases import delete_release
+    from rose_lib.releases import delete_release
 
     release = parse_release_argument(release)
     delete_release(ctx.config, release)
@@ -234,7 +235,7 @@ def delete_release(ctx: Context, release: str) -> None:
 @click.pass_obj
 def set_cover_release(ctx: Context, release: str, cover: Path) -> None:
     """Set/replace the cover art of a release. Accepts a release's UUID/path."""
-    from rose_core.releases import set_release_cover_art
+    from rose_lib.releases import set_release_cover_art
 
     release = parse_release_argument(release)
     set_release_cover_art(ctx.config, release, cover)
@@ -245,7 +246,7 @@ def set_cover_release(ctx: Context, release: str, cover: Path) -> None:
 @click.pass_obj
 def delete_cover_release(ctx: Context, release: str) -> None:
     """Delete the cover art of a release."""
-    from rose_core.releases import delete_release_cover_art
+    from rose_lib.releases import delete_release_cover_art
 
     release = parse_release_argument(release)
     delete_release_cover_art(ctx.config, release)
@@ -259,8 +260,8 @@ def delete_cover_release(ctx: Context, release: str) -> None:
 @click.pass_obj
 def run_rule(ctx: Context, release: str, actions: list[str], dry_run: bool, yes: bool) -> None:
     """Run rule engine actions on all tracks in a release. Accepts a release's UUID/path."""
-    from rose_core.releases import run_actions_on_release
-    from rose_core.rule_parser import MetadataAction
+    from rose_lib.releases import run_actions_on_release
+    from rose_lib.rule_parser import MetadataAction
 
     release = parse_release_argument(release)
     parsed_actions = [MetadataAction.parse(a) for a in actions]
@@ -281,7 +282,7 @@ def create_single(ctx: Context, track_path: Path) -> None:
     Create a single release for the given track, and copy the track into it. Only accepts a track
     path.
     """
-    from rose_core.releases import create_single_release
+    from rose_lib.releases import create_single_release
 
     create_single_release(ctx.config, track_path)
 
@@ -296,7 +297,7 @@ def tracks() -> None:
 @click.pass_obj
 def print_track(ctx: Context, track: str) -> None:
     """Print a single track (in JSON). Accepts a tracks's UUID/path."""
-    from rose_core.tracks import dump_track
+    from rose_lib.tracks import dump_track
 
     track = parse_track_argument(track)
     click.echo(dump_track(ctx.config, track))
@@ -307,8 +308,8 @@ def print_track(ctx: Context, track: str) -> None:
 @click.pass_obj
 def print_all_track(ctx: Context, matcher: str | None = None) -> None:
     """Print all tracks (in JSON). Accepts an optional rules matcher to filter the tracks."""
-    from rose_core.rule_parser import MetadataMatcher
-    from rose_core.tracks import dump_all_tracks
+    from rose_lib.rule_parser import MetadataMatcher
+    from rose_lib.tracks import dump_all_tracks
 
     parsed_matcher = MetadataMatcher.parse(matcher) if matcher else None
     click.echo(dump_all_tracks(ctx.config, parsed_matcher))
@@ -322,8 +323,8 @@ def print_all_track(ctx: Context, matcher: str | None = None) -> None:
 @click.pass_obj
 def run_rule_track(ctx: Context, track: str, actions: list[str], dry_run: bool, yes: bool) -> None:
     """Run rule engine actions on a single track. Accepts a track's UUID/path."""
-    from rose_core.rule_parser import MetadataAction
-    from rose_core.tracks import run_actions_on_track
+    from rose_lib.rule_parser import MetadataAction
+    from rose_lib.tracks import run_actions_on_track
 
     track = parse_track_argument(track)
     parsed_actions = [MetadataAction.parse(a) for a in actions]
@@ -346,7 +347,7 @@ def collages() -> None:
 @click.pass_obj
 def create(ctx: Context, name: str) -> None:
     """Create a new collage."""
-    from rose_core.collages import create_collage
+    from rose_lib.collages import create_collage
 
     create_collage(ctx.config, name)
 
@@ -357,7 +358,7 @@ def create(ctx: Context, name: str) -> None:
 @click.pass_obj
 def rename(ctx: Context, old_name: str, new_name: str) -> None:
     """Rename a collage."""
-    from rose_core.collages import rename_collage
+    from rose_lib.collages import rename_collage
 
     rename_collage(ctx.config, old_name, new_name)
 
@@ -367,7 +368,7 @@ def rename(ctx: Context, old_name: str, new_name: str) -> None:
 @click.pass_obj
 def delete(ctx: Context, collage: str) -> None:
     """Delete a collage."""
-    from rose_core.collages import delete_collage
+    from rose_lib.collages import delete_collage
 
     delete_collage(ctx.config, collage)
 
@@ -378,7 +379,7 @@ def delete(ctx: Context, collage: str) -> None:
 @click.pass_obj
 def add_release(ctx: Context, collage: str, release: str) -> None:
     """Add a release to a collage. Accepts a collage's name and a release's UUID/path."""
-    from rose_core.collages import add_release_to_collage
+    from rose_lib.collages import add_release_to_collage
 
     release = parse_release_argument(release)
     add_release_to_collage(ctx.config, collage, release)
@@ -390,7 +391,7 @@ def add_release(ctx: Context, collage: str, release: str) -> None:
 @click.pass_obj
 def remove_release(ctx: Context, collage: str, release: str) -> None:
     """Remove a release from a collage. Accepts a collage's name and a release's UUID/path."""
-    from rose_core.collages import remove_release_from_collage
+    from rose_lib.collages import remove_release_from_collage
 
     release = parse_release_argument(release)
     remove_release_from_collage(ctx.config, collage, release)
@@ -401,7 +402,7 @@ def remove_release(ctx: Context, collage: str, release: str) -> None:
 @click.pass_obj
 def edit(ctx: Context, collage: str) -> None:
     """Edit (reorder/remove releases from) a collage in $EDITOR. Accepts a collage's name."""
-    from rose_core.collages import edit_collage_in_editor
+    from rose_lib.collages import edit_collage_in_editor
 
     edit_collage_in_editor(ctx.config, collage)
 
@@ -411,7 +412,7 @@ def edit(ctx: Context, collage: str) -> None:
 @click.pass_obj
 def print_collage(ctx: Context, collage: str) -> None:
     """Print a collage (in JSON). Accepts a collage's name."""
-    from rose_core.collages import dump_collage
+    from rose_lib.collages import dump_collage
 
     click.echo(dump_collage(ctx.config, collage))
 
@@ -420,7 +421,7 @@ def print_collage(ctx: Context, collage: str) -> None:
 @click.pass_obj
 def print_all_collages(ctx: Context) -> None:
     """Print all collages (in JSON)."""
-    from rose_core.collages import dump_all_collages
+    from rose_lib.collages import dump_all_collages
 
     click.echo(dump_all_collages(ctx.config))
 
@@ -435,7 +436,7 @@ def playlists() -> None:
 @click.pass_obj
 def create_playlist(ctx: Context, name: str) -> None:
     """Create a new playlist."""
-    from rose_core.playlists import create_playlist
+    from rose_lib.playlists import create_playlist
 
     create_playlist(ctx.config, name)
 
@@ -446,7 +447,7 @@ def create_playlist(ctx: Context, name: str) -> None:
 @click.pass_obj
 def rename_playlist(ctx: Context, old_name: str, new_name: str) -> None:
     """Rename a playlist. Accepts a playlist's name."""
-    from rose_core.playlists import rename_playlist
+    from rose_lib.playlists import rename_playlist
 
     rename_playlist(ctx.config, old_name, new_name)
 
@@ -456,7 +457,7 @@ def rename_playlist(ctx: Context, old_name: str, new_name: str) -> None:
 @click.pass_obj
 def delete_playlist(ctx: Context, playlist: str) -> None:
     """Delete a playlist. Accepts a playlist's name."""
-    from rose_core.playlists import delete_playlist
+    from rose_lib.playlists import delete_playlist
 
     delete_playlist(ctx.config, playlist)
 
@@ -467,7 +468,7 @@ def delete_playlist(ctx: Context, playlist: str) -> None:
 @click.pass_obj
 def add_track(ctx: Context, playlist: str, track: str) -> None:
     """Add a track to a playlist. Accepts a playlist name and a track's UUID/path."""
-    from rose_core.playlists import add_track_to_playlist
+    from rose_lib.playlists import add_track_to_playlist
 
     track = parse_track_argument(track)
     add_track_to_playlist(ctx.config, playlist, track)
@@ -479,7 +480,7 @@ def add_track(ctx: Context, playlist: str, track: str) -> None:
 @click.pass_obj
 def remove_track(ctx: Context, playlist: str, track: str) -> None:
     """Remove a track from a playlist. Accepts a playlist name and a track's UUID/path."""
-    from rose_core.playlists import remove_track_from_playlist
+    from rose_lib.playlists import remove_track_from_playlist
 
     track = parse_track_argument(track)
     remove_track_from_playlist(ctx.config, playlist, track)
@@ -493,7 +494,7 @@ def edit_playlist(ctx: Context, playlist: str) -> None:
     Edit a playlist in $EDITOR. Reorder lines to update the ordering of tracks. Delete lines to
     delete tracks from the playlist.
     """
-    from rose_core.playlists import edit_playlist_in_editor
+    from rose_lib.playlists import edit_playlist_in_editor
 
     edit_playlist_in_editor(ctx.config, playlist)
 
@@ -503,7 +504,7 @@ def edit_playlist(ctx: Context, playlist: str) -> None:
 @click.pass_obj
 def print_playlist(ctx: Context, playlist: str) -> None:
     """Print a playlist (in JSON). Accepts a playlist's name."""
-    from rose_core.playlists import dump_playlist
+    from rose_lib.playlists import dump_playlist
 
     click.echo(dump_playlist(ctx.config, playlist))
 
@@ -512,7 +513,7 @@ def print_playlist(ctx: Context, playlist: str) -> None:
 @click.pass_obj
 def print_all_playlists(ctx: Context) -> None:
     """Print all playlists (in JSON)."""
-    from rose_core.playlists import dump_all_playlists
+    from rose_lib.playlists import dump_all_playlists
 
     click.echo(dump_all_playlists(ctx.config))
 
@@ -525,7 +526,7 @@ def set_cover_playlist(ctx: Context, playlist: str, cover: Path) -> None:
     """
     Set the cover art of a playlist. Accepts a playlist name and a path to an image.
     """
-    from rose_core.playlists import set_playlist_cover_art
+    from rose_lib.playlists import set_playlist_cover_art
 
     set_playlist_cover_art(ctx.config, playlist, cover)
 
@@ -535,7 +536,7 @@ def set_cover_playlist(ctx: Context, playlist: str, cover: Path) -> None:
 @click.pass_obj
 def delete_cover_playlist(ctx: Context, playlist: str) -> None:
     """Delete the cover art of a playlist. Accepts a playlist name."""
-    from rose_core.playlists import delete_playlist_cover_art
+    from rose_lib.playlists import delete_playlist_cover_art
 
     delete_playlist_cover_art(ctx.config, playlist)
 
@@ -561,8 +562,8 @@ def run(
     ignore: list[str],
 ) -> None:
     """Run an ad hoc rule."""
-    from rose_core.rule_parser import MetadataRule
-    from rose_core.rules import execute_metadata_rule
+    from rose_lib.rule_parser import MetadataRule
+    from rose_lib.rules import execute_metadata_rule
 
     if not actions:
         logger.info("No-Op: No actions passed")
@@ -577,15 +578,14 @@ def run(
 @click.pass_obj
 def run_stored(ctx: Context, dry_run: bool, yes: bool) -> None:
     """Run the rules stored in the config."""
-    from rose_core.rules import execute_stored_metadata_rules
+    from rose_lib.rules import execute_stored_metadata_rules
 
     execute_stored_metadata_rules(ctx.config, dry_run=dry_run, confirm_yes=not yes)
 
 
 def parse_release_argument(r: str) -> str:
     """Takes in a release argument and normalizes it to the release ID."""
-    from rose_core.cache import STORED_DATA_FILE_REGEX
-    from rose_core.common import valid_uuid
+    from rose_lib.cache import STORED_DATA_FILE_REGEX
 
     if valid_uuid(r):
         logger.debug(f"Treating release argument {r} as UUID")
@@ -615,8 +615,7 @@ def parse_release_argument(r: str) -> str:
 
 def parse_track_argument(t: str) -> str:
     """Takes in a track argument and normalizes it to the track ID."""
-    from rose_core.audiotags import AudioTags, UnsupportedFiletypeError
-    from rose_core.common import valid_uuid
+    from rose_lib.audiotags import AudioTags, UnsupportedFiletypeError
 
     if valid_uuid(t):
         logger.debug(f"Treating track argument {t} as UUID")
@@ -700,3 +699,11 @@ def daemonize(pid_path: Path | None = None) -> None:
         with pid_path.open("w") as fp:
             fp.write(str(pid))
     os._exit(0)
+
+
+def valid_uuid(x: str) -> bool:
+    try:
+        uuid.UUID(x)
+        return True
+    except ValueError:
+        return False
diff --git a/rose_core/cli_test.py b/rose_cli/cli_test.py
similarity index 96%
rename from rose_core/cli_test.py
rename to rose_cli/cli_test.py
index 1cb28fe..ec853d5 100644
--- a/rose_core/cli_test.py
+++ b/rose_cli/cli_test.py
@@ -6,8 +6,7 @@
 import pytest
 from click.testing import CliRunner
 
-from rose_core.audiotags import AudioTags
-from rose_core.cli import (
+from rose_cli.cli import (
     Context,
     InvalidReleaseArgError,
     InvalidTrackArgError,
@@ -18,8 +17,9 @@
     unwatch,
     watch,
 )
-from rose_core.config import Config
-from rose_core.virtualfs_test import start_virtual_fs
+from rose_lib.audiotags import AudioTags
+from rose_lib.config import Config
+from rose_vfs.virtualfs_test import start_virtual_fs
 
 
 @pytest.mark.usefixtures("seeded_cache")
diff --git a/rose_core/__init__.py b/rose_core/__init__.py
deleted file mode 100644
index dddb610..0000000
--- a/rose_core/__init__.py
+++ /dev/null
@@ -1,48 +0,0 @@
-import logging
-import logging.handlers
-import os
-import sys
-from pathlib import Path
-
-import appdirs
-
-logger = logging.getLogger()
-logger.setLevel(logging.INFO)
-
-# appdirs by default has Unix log to $XDG_CACHE_HOME, but I'd rather write logs to $XDG_STATE_HOME.
-LOG_HOME = Path(appdirs.user_state_dir("rose"))
-if appdirs.system == "darwin":
-    LOG_HOME = Path(appdirs.user_log_dir("rose"))
-
-LOG_HOME.mkdir(parents=True, exist_ok=True)
-LOGFILE = LOG_HOME / "rose.log"
-
-# Useful for debugging problems with the virtual FS, since pytest doesn't capture that debug logging
-# output.
-LOG_EVEN_THOUGH_WERE_IN_TEST = os.environ.get("LOG_TEST", False)
-
-# Add a logging handler for stdout unless we are testing. Pytest
-# captures logging output on its own, so by default, we do not attach our own.
-if "pytest" not in sys.modules or LOG_EVEN_THOUGH_WERE_IN_TEST:  # pragma: no cover
-    simple_formatter = logging.Formatter(
-        "[%(asctime)s] %(levelname)s: %(message)s",
-        datefmt="%H:%M:%S",
-    )
-    verbose_formatter = logging.Formatter(
-        "[ts=%(asctime)s.%(msecs)03d] [pid=%(process)d] [src=%(name)s:%(lineno)s] %(levelname)s: %(message)s",
-        datefmt="%Y-%m-%d %H:%M:%S",
-    )
-
-    stream_handler = logging.StreamHandler(sys.stderr)
-    stream_handler.setFormatter(
-        simple_formatter if not LOG_EVEN_THOUGH_WERE_IN_TEST else verbose_formatter
-    )
-    logger.addHandler(stream_handler)
-
-    file_handler = logging.handlers.RotatingFileHandler(
-        LOGFILE,
-        maxBytes=20 * 1024 * 1024,
-        backupCount=10,
-    )
-    file_handler.setFormatter(verbose_formatter)
-    logger.addHandler(file_handler)
diff --git a/rose_core/.version b/rose_lib/.version
similarity index 100%
rename from rose_core/.version
rename to rose_lib/.version
diff --git a/rose_lib/__init__.py b/rose_lib/__init__.py
new file mode 100644
index 0000000..d772be9
--- /dev/null
+++ b/rose_lib/__init__.py
@@ -0,0 +1,221 @@
+import logging
+import logging.handlers
+import os
+import sys
+from pathlib import Path
+
+import appdirs
+
+from rose_lib.audiotags import (
+    SUPPORTED_AUDIO_EXTENSIONS,
+    AudioTags,
+    UnsupportedFiletypeError,
+)
+from rose_lib.cache import (
+    STORED_DATA_FILE_REGEX,
+    CachedRelease,
+    CachedTrack,
+    artist_exists,
+    calculate_release_logtext,
+    calculate_track_logtext,
+    collage_exists,
+    genre_exists,
+    get_collage,
+    get_path_of_track_in_playlist,
+    get_playlist,
+    get_playlist_cover_path,
+    get_release,
+    get_track,
+    get_tracks_associated_with_release,
+    label_exists,
+    list_artists,
+    list_collages,
+    list_genres,
+    list_labels,
+    list_playlists,
+    maybe_invalidate_cache_database,
+    playlist_exists,
+    update_cache,
+    update_cache_for_releases,
+)
+from rose_lib.collages import (
+    add_release_to_collage,
+    create_collage,
+    delete_collage,
+    dump_all_collages,
+    dump_collage,
+    edit_collage_in_editor,
+    remove_release_from_collage,
+    rename_collage,
+)
+from rose_lib.common import (
+    VERSION,
+    RoseError,
+    RoseExpectedError,
+    sanitize_dirname,
+    sanitize_filename,
+)
+from rose_lib.config import Config
+from rose_lib.playlists import (
+    add_track_to_playlist,
+    create_playlist,
+    delete_playlist,
+    delete_playlist_cover_art,
+    dump_all_playlists,
+    dump_playlist,
+    edit_playlist_in_editor,
+    remove_track_from_playlist,
+    rename_playlist,
+    set_playlist_cover_art,
+)
+from rose_lib.releases import (
+    create_single_release,
+    delete_release,
+    delete_release_cover_art,
+    dump_all_releases,
+    dump_release,
+    edit_release,
+    run_actions_on_release,
+    set_release_cover_art,
+    toggle_release_new,
+)
+from rose_lib.rule_parser import MetadataAction, MetadataMatcher, MetadataRule
+from rose_lib.rules import execute_metadata_rule, execute_stored_metadata_rules
+from rose_lib.templates import (
+    PathTemplate,
+    eval_release_template,
+    eval_track_template,
+    preview_path_templates,
+)
+from rose_lib.tracks import dump_all_tracks, dump_track, run_actions_on_track
+from rose_lib.watcher import start_watchdog
+
+__all__ = [
+    "AudioTags",
+    "CachedRelease",
+    "CachedTrack",
+    "Config",
+    "MetadataAction",
+    "MetadataMatcher",
+    "MetadataRule",
+    "PathTemplate",
+    "RoseError",
+    "RoseExpectedError",
+    "STORED_DATA_FILE_REGEX",  # TODO: Revise: is_release_directory / is_track_file
+    "SUPPORTED_AUDIO_EXTENSIONS",
+    "UnsupportedFiletypeError",
+    "VERSION",
+    "add_release_to_collage",
+    "add_track_to_playlist",
+    "artist_exists",
+    "calculate_release_logtext",  # TODO: Rename.
+    "calculate_track_logtext",  # TODO: Rename.
+    "collage_exists",
+    "create_collage",
+    "create_playlist",
+    "create_single_release",
+    "delete_collage",
+    "delete_playlist",
+    "delete_playlist_cover_art",
+    "delete_release",
+    "delete_release_cover_art",
+    "dump_all_collages",
+    "dump_all_playlists",
+    "dump_all_releases",
+    "dump_all_tracks",
+    "dump_collage",
+    "dump_playlist",
+    "dump_release",
+    "dump_track",
+    "edit_collage_in_editor",  # TODO: Move editor part to CLI, make this file-submissions.
+    "edit_playlist_in_editor",  # TODO: Move editor part to CLI, make this file-submissions.
+    "edit_release",
+    "eval_release_template",  # TODO: Rename.
+    "eval_track_template",  # TODO: Rename.
+    "execute_metadata_rule",
+    "execute_stored_metadata_rules",
+    "genre_exists",
+    "get_collage",
+    "get_path_of_track_in_playlist",  # TODO: Redesign.
+    "get_playlist",
+    "get_playlist_cover_path",  # TODO: Remove.
+    "get_release",
+    "get_track",
+    "get_tracks_associated_with_release",  # TODO: Rename: `get_tracks_of_release` / `dump_release(with_tracks=tracks)`
+    "label_exists",
+    "list_artists",
+    "list_collages",
+    "list_genres",
+    "list_labels",
+    "list_playlists",
+    "maybe_invalidate_cache_database",
+    "playlist_exists",
+    "preview_path_templates",
+    "remove_release_from_collage",
+    "remove_track_from_playlist",
+    "rename_collage",
+    "rename_playlist",
+    "run_actions_on_release",
+    "run_actions_on_track",
+    "sanitize_dirname",
+    "sanitize_filename",
+    "set_playlist_cover_art",
+    "set_release_cover_art",
+    "start_watchdog",
+    "toggle_release_new",
+    "update_cache",
+    "update_cache_for_releases",
+]
+
+__logging_initialized = False
+
+
+def initialize_logging() -> None:
+    global __logging_initialized
+    if __logging_initialized:
+        return
+    __logging_initialized = True
+
+    logger = logging.getLogger()
+    logger.setLevel(logging.INFO)
+
+    # appdirs by default has Unix log to $XDG_CACHE_HOME, but I'd rather write logs to $XDG_STATE_HOME.
+    log_home = Path(appdirs.user_state_dir("rose"))
+    if appdirs.system == "darwin":
+        log_home = Path(appdirs.user_log_dir("rose"))
+
+    log_home.mkdir(parents=True, exist_ok=True)
+    log_file = log_home / "rose.log"
+
+    # Useful for debugging problems with the virtual FS, since pytest doesn't capture that debug logging
+    # output.
+    log_despite_testing = os.environ.get("LOG_TEST", False)
+
+    # Add a logging handler for stdout unless we are testing. Pytest
+    # captures logging output on its own, so by default, we do not attach our own.
+    if "pytest" not in sys.modules or log_despite_testing:  # pragma: no cover
+        simple_formatter = logging.Formatter(
+            "[%(asctime)s] %(levelname)s: %(message)s",
+            datefmt="%H:%M:%S",
+        )
+        verbose_formatter = logging.Formatter(
+            "[ts=%(asctime)s.%(msecs)03d] [pid=%(process)d] [src=%(name)s:%(lineno)s] %(levelname)s: %(message)s",
+            datefmt="%Y-%m-%d %H:%M:%S",
+        )
+
+        stream_handler = logging.StreamHandler(sys.stderr)
+        stream_handler.setFormatter(
+            simple_formatter if not log_despite_testing else verbose_formatter
+        )
+        logger.addHandler(stream_handler)
+
+        file_handler = logging.handlers.RotatingFileHandler(
+            log_file,
+            maxBytes=20 * 1024 * 1024,
+            backupCount=10,
+        )
+        file_handler.setFormatter(verbose_formatter)
+        logger.addHandler(file_handler)
+
+
+initialize_logging()
diff --git a/rose_core/audiotags.py b/rose_lib/audiotags.py
similarity index 99%
rename from rose_core/audiotags.py
rename to rose_lib/audiotags.py
index fa6847c..d7856f5 100644
--- a/rose_core/audiotags.py
+++ b/rose_lib/audiotags.py
@@ -25,7 +25,7 @@
 import mutagen.oggopus
 import mutagen.oggvorbis
 
-from rose_core.common import Artist, ArtistMapping, RoseError, RoseExpectedError, uniq
+from rose_lib.common import Artist, ArtistMapping, RoseError, RoseExpectedError, uniq
 
 if typing.TYPE_CHECKING:
     pass
diff --git a/rose_core/audiotags_test.py b/rose_lib/audiotags_test.py
similarity index 98%
rename from rose_core/audiotags_test.py
rename to rose_lib/audiotags_test.py
index e324dae..c3ec83a 100644
--- a/rose_core/audiotags_test.py
+++ b/rose_lib/audiotags_test.py
@@ -4,14 +4,14 @@
 import pytest
 
 from conftest import TEST_TAGGER
-from rose_core.audiotags import (
+from rose_lib.audiotags import (
     AudioTags,
     UnsupportedTagValueTypeError,
     _split_tag,
     format_artist_string,
     parse_artist_string,
 )
-from rose_core.common import Artist, ArtistMapping
+from rose_lib.common import Artist, ArtistMapping
 
 
 @pytest.mark.parametrize(
diff --git a/rose_core/cache.py b/rose_lib/cache.py
similarity index 99%
rename from rose_core/cache.py
rename to rose_lib/cache.py
index ff3cd5a..937b65c 100644
--- a/rose_core/cache.py
+++ b/rose_lib/cache.py
@@ -50,8 +50,8 @@
 import tomllib
 import uuid6
 
-from rose_core.audiotags import SUPPORTED_AUDIO_EXTENSIONS, AudioTags
-from rose_core.common import (
+from rose_lib.audiotags import SUPPORTED_AUDIO_EXTENSIONS, AudioTags
+from rose_lib.common import (
     VERSION,
     Artist,
     ArtistMapping,
@@ -60,8 +60,8 @@
     sha256_dataclass,
     uniq,
 )
-from rose_core.config import Config
-from rose_core.templates import artistsfmt, eval_release_template, eval_track_template
+from rose_lib.config import Config
+from rose_lib.templates import artistsfmt, eval_release_template, eval_track_template
 
 logger = logging.getLogger(__name__)
 
diff --git a/rose_core/cache.sql b/rose_lib/cache.sql
similarity index 100%
rename from rose_core/cache.sql
rename to rose_lib/cache.sql
diff --git a/rose_core/cache_test.py b/rose_lib/cache_test.py
similarity index 99%
rename from rose_core/cache_test.py
rename to rose_lib/cache_test.py
index 83d101b..f315677 100644
--- a/rose_core/cache_test.py
+++ b/rose_lib/cache_test.py
@@ -8,8 +8,8 @@
 import tomllib
 
 from conftest import TEST_COLLAGE_1, TEST_PLAYLIST_1, TEST_RELEASE_1, TEST_RELEASE_2, TEST_RELEASE_3
-from rose_core.audiotags import AudioTags
-from rose_core.cache import (
+from rose_lib.audiotags import AudioTags
+from rose_lib.cache import (
     CACHE_SCHEMA_PATH,
     STORED_DATA_FILE_REGEX,
     CachedCollage,
@@ -47,8 +47,8 @@
     update_cache_evict_nonexistent_releases,
     update_cache_for_releases,
 )
-from rose_core.common import VERSION, Artist, ArtistMapping
-from rose_core.config import Config
+from rose_lib.common import VERSION, Artist, ArtistMapping
+from rose_lib.config import Config
 
 
 def test_schema(config: Config) -> None:
diff --git a/rose_core/collages.py b/rose_lib/collages.py
similarity index 98%
rename from rose_core/collages.py
rename to rose_lib/collages.py
index 70ba16e..a884b39 100644
--- a/rose_core/collages.py
+++ b/rose_lib/collages.py
@@ -12,7 +12,7 @@
 import tomllib
 from send2trash import send2trash
 
-from rose_core.cache import (
+from rose_lib.cache import (
     collage_lock_name,
     get_collage,
     get_release_logtext,
@@ -21,8 +21,8 @@
     update_cache_evict_nonexistent_collages,
     update_cache_for_collages,
 )
-from rose_core.common import RoseExpectedError
-from rose_core.config import Config
+from rose_lib.common import RoseExpectedError
+from rose_lib.config import Config
 
 logger = logging.getLogger(__name__)
 
diff --git a/rose_core/collages_test.py b/rose_lib/collages_test.py
similarity index 97%
rename from rose_core/collages_test.py
rename to rose_lib/collages_test.py
index de31c2e..5656b01 100644
--- a/rose_core/collages_test.py
+++ b/rose_lib/collages_test.py
@@ -5,8 +5,8 @@
 import pytest
 import tomllib
 
-from rose_core.cache import connect, update_cache
-from rose_core.collages import (
+from rose_lib.cache import connect, update_cache
+from rose_lib.collages import (
     add_release_to_collage,
     create_collage,
     delete_collage,
@@ -16,7 +16,7 @@
     remove_release_from_collage,
     rename_collage,
 )
-from rose_core.config import Config
+from rose_lib.config import Config
 
 
 def test_remove_release_from_collage(config: Config, source_dir: Path) -> None:
@@ -242,7 +242,7 @@ def test_dump_collages(config: Config) -> None:
 def test_edit_collages_ordering(monkeypatch: Any, config: Config, source_dir: Path) -> None:
     filepath = source_dir / "!collages" / "Rose Gold.toml"
     monkeypatch.setattr(
-        "rose_core.collages.click.edit", lambda x: "\n".join(reversed(x.split("\n")))
+        "rose_lib.collages.click.edit", lambda x: "\n".join(reversed(x.split("\n")))
     )
     edit_collage_in_editor(config, "Rose Gold")
 
@@ -254,7 +254,7 @@ def test_edit_collages_ordering(monkeypatch: Any, config: Config, source_dir: Pa
 
 def test_edit_collages_remove_release(monkeypatch: Any, config: Config, source_dir: Path) -> None:
     filepath = source_dir / "!collages" / "Rose Gold.toml"
-    monkeypatch.setattr("rose_core.collages.click.edit", lambda x: x.split("\n")[0])
+    monkeypatch.setattr("rose_lib.collages.click.edit", lambda x: x.split("\n")[0])
     edit_collage_in_editor(config, "Rose Gold")
 
     with filepath.open("rb") as fp:
diff --git a/rose_core/common.py b/rose_lib/common.py
similarity index 96%
rename from rose_core/common.py
rename to rose_lib/common.py
index 1de7ae6..1867c14 100644
--- a/rose_core/common.py
+++ b/rose_lib/common.py
@@ -7,7 +7,6 @@
 import hashlib
 import os.path
 import re
-import uuid
 from collections.abc import Iterator
 from pathlib import Path
 from typing import Any, TypeVar
@@ -72,14 +71,6 @@ def items(self) -> Iterator[tuple[str, list[Artist]]]:
         yield "djmixer", self.djmixer
 
 
-def valid_uuid(x: str) -> bool:
-    try:
-        uuid.UUID(x)
-        return True
-    except ValueError:
-        return False
-
-
 def uniq(xs: list[T]) -> list[T]:
     rv: list[T] = []
     seen: set[T] = set()
diff --git a/rose_core/config.py b/rose_lib/config.py
similarity index 99%
rename from rose_core/config.py
rename to rose_lib/config.py
index 4c30fb7..91ee9ad 100644
--- a/rose_core/config.py
+++ b/rose_lib/config.py
@@ -20,9 +20,9 @@
 import appdirs
 import tomllib
 
-from rose_core.common import RoseExpectedError, sanitize_dirname
-from rose_core.rule_parser import MetadataRule, RuleSyntaxError
-from rose_core.templates import (
+from rose_lib.common import RoseExpectedError, sanitize_dirname
+from rose_lib.rule_parser import MetadataRule, RuleSyntaxError
+from rose_lib.templates import (
     DEFAULT_TEMPLATE_PAIR,
     InvalidPathTemplateError,
     PathTemplate,
diff --git a/rose_core/config_test.py b/rose_lib/config_test.py
similarity index 99%
rename from rose_core/config_test.py
rename to rose_lib/config_test.py
index f513936..37fbace 100644
--- a/rose_core/config_test.py
+++ b/rose_lib/config_test.py
@@ -4,13 +4,13 @@
 import click
 import pytest
 
-from rose_core.config import (
+from rose_lib.config import (
     Config,
     ConfigNotFoundError,
     InvalidConfigValueError,
     MissingConfigKeyError,
 )
-from rose_core.rule_parser import (
+from rose_lib.rule_parser import (
     MatcherPattern,
     MetadataAction,
     MetadataMatcher,
@@ -18,7 +18,7 @@
     ReplaceAction,
     SplitAction,
 )
-from rose_core.templates import PathTemplate, PathTemplateConfig, PathTemplatePair
+from rose_lib.templates import PathTemplate, PathTemplateConfig, PathTemplatePair
 
 
 def test_config_minimal() -> None:
diff --git a/rose_core/playlists.py b/rose_lib/playlists.py
similarity index 98%
rename from rose_core/playlists.py
rename to rose_lib/playlists.py
index 73a2fa1..a2727b3 100644
--- a/rose_core/playlists.py
+++ b/rose_lib/playlists.py
@@ -14,7 +14,7 @@
 import tomllib
 from send2trash import send2trash
 
-from rose_core.cache import (
+from rose_lib.cache import (
     get_playlist,
     get_track_logtext,
     list_playlists,
@@ -23,8 +23,8 @@
     update_cache_evict_nonexistent_playlists,
     update_cache_for_playlists,
 )
-from rose_core.common import RoseExpectedError
-from rose_core.config import Config
+from rose_lib.common import RoseExpectedError
+from rose_lib.config import Config
 
 logger = logging.getLogger(__name__)
 
diff --git a/rose_core/playlists_test.py b/rose_lib/playlists_test.py
similarity index 98%
rename from rose_core/playlists_test.py
rename to rose_lib/playlists_test.py
index b8b8e61..2bce313 100644
--- a/rose_core/playlists_test.py
+++ b/rose_lib/playlists_test.py
@@ -7,9 +7,9 @@
 import tomllib
 
 from conftest import TEST_PLAYLIST_1, TEST_RELEASE_1
-from rose_core.cache import connect, update_cache
-from rose_core.config import Config
-from rose_core.playlists import (
+from rose_lib.cache import connect, update_cache
+from rose_lib.config import Config
+from rose_lib.playlists import (
     add_track_to_playlist,
     create_playlist,
     delete_playlist,
@@ -312,7 +312,7 @@ def test_dump_playlists(config: Config) -> None:
 def test_edit_playlists_ordering(monkeypatch: Any, config: Config, source_dir: Path) -> None:
     filepath = source_dir / "!playlists" / "Lala Lisa.toml"
     monkeypatch.setattr(
-        "rose_core.playlists.click.edit", lambda x: "\n".join(reversed(x.split("\n")))
+        "rose_lib.playlists.click.edit", lambda x: "\n".join(reversed(x.split("\n")))
     )
     edit_playlist_in_editor(config, "Lala Lisa")
 
@@ -324,7 +324,7 @@ def test_edit_playlists_ordering(monkeypatch: Any, config: Config, source_dir: P
 
 def test_edit_playlists_remove_track(monkeypatch: Any, config: Config, source_dir: Path) -> None:
     filepath = source_dir / "!playlists" / "Lala Lisa.toml"
-    monkeypatch.setattr("rose_core.playlists.click.edit", lambda x: x.split("\n")[0])
+    monkeypatch.setattr("rose_lib.playlists.click.edit", lambda x: x.split("\n")[0])
     edit_playlist_in_editor(config, "Lala Lisa")
 
     with filepath.open("rb") as fp:
@@ -359,7 +359,7 @@ def editfn(x: str) -> str:
         seen = x
         return "\n".join(reversed(x.split("\n")))
 
-    monkeypatch.setattr("rose_core.playlists.click.edit", editfn)
+    monkeypatch.setattr("rose_lib.playlists.click.edit", editfn)
     edit_playlist_in_editor(config, "You & Me")
 
     assert seen == "\n".join([f"BLACKPINK - Track 1 [1990].m4a [{tid}]" for tid in track_ids])
diff --git a/rose_core/releases.py b/rose_lib/releases.py
similarity index 98%
rename from rose_core/releases.py
rename to rose_lib/releases.py
index 1aca19f..116df9d 100644
--- a/rose_core/releases.py
+++ b/rose_lib/releases.py
@@ -17,8 +17,8 @@
 import tomllib
 from send2trash import send2trash
 
-from rose_core.audiotags import AudioTags
-from rose_core.cache import (
+from rose_lib.audiotags import AudioTags
+from rose_lib.cache import (
     STORED_DATA_FILE_REGEX,
     CachedRelease,
     CachedTrack,
@@ -34,15 +34,15 @@
     update_cache_for_playlists,
     update_cache_for_releases,
 )
-from rose_core.common import Artist, ArtistMapping, RoseError, RoseExpectedError
-from rose_core.config import Config
-from rose_core.rule_parser import MetadataAction, MetadataMatcher
-from rose_core.rules import (
+from rose_lib.common import Artist, ArtistMapping, RoseError, RoseExpectedError
+from rose_lib.config import Config
+from rose_lib.rule_parser import MetadataAction, MetadataMatcher
+from rose_lib.rules import (
     execute_metadata_actions,
     fast_search_for_matching_releases,
     filter_release_false_positives_using_read_cache,
 )
-from rose_core.templates import artistsfmt
+from rose_lib.templates import artistsfmt
 
 logger = logging.getLogger(__name__)
 
diff --git a/rose_core/releases_test.py b/rose_lib/releases_test.py
similarity index 97%
rename from rose_core/releases_test.py
rename to rose_lib/releases_test.py
index 85bf1c3..4a53b3c 100644
--- a/rose_core/releases_test.py
+++ b/rose_lib/releases_test.py
@@ -8,8 +8,8 @@
 import tomllib
 
 from conftest import TEST_RELEASE_1
-from rose_core.audiotags import AudioTags
-from rose_core.cache import (
+from rose_lib.audiotags import AudioTags
+from rose_lib.cache import (
     CachedRelease,
     CachedTrack,
     connect,
@@ -17,9 +17,9 @@
     get_tracks_associated_with_release,
     update_cache,
 )
-from rose_core.common import Artist, ArtistMapping
-from rose_core.config import Config
-from rose_core.releases import (
+from rose_lib.common import Artist, ArtistMapping
+from rose_lib.config import Config
+from rose_lib.releases import (
     ReleaseEditFailedError,
     create_single_release,
     delete_release,
@@ -31,7 +31,7 @@
     set_release_cover_art,
     toggle_release_new,
 )
-from rose_core.rule_parser import MetadataAction, MetadataMatcher
+from rose_lib.rule_parser import MetadataAction, MetadataMatcher
 
 
 def test_delete_release(config: Config) -> None:
@@ -165,7 +165,7 @@ def test_edit_release(monkeypatch: Any, config: Config, source_dir: Path) -> Non
             {{ name = "JISOO", role = "main" }},
         ]
     """
-    monkeypatch.setattr("rose_core.collages.click.edit", lambda *_, **__: new_toml)
+    monkeypatch.setattr("rose_lib.collages.click.edit", lambda *_, **__: new_toml)
 
     edit_release(config, release_id)
     release = get_release(config, release_id)
@@ -264,7 +264,7 @@ def test_edit_release_failure_and_resume(
             {{ name = "JISOO", role = "main" }},
         ]
     """
-    monkeypatch.setattr("rose_core.collages.click.edit", lambda *_, **__: bad_toml)
+    monkeypatch.setattr("rose_lib.collages.click.edit", lambda *_, **__: bad_toml)
 
     with pytest.raises(ReleaseEditFailedError) as exc:
         edit_release(config, release_id)
@@ -311,7 +311,7 @@ def editfn(text: str, **_: Any) -> str:
         assert text == bad_toml
         return correct_toml
 
-    monkeypatch.setattr("rose_core.collages.click.edit", editfn)
+    monkeypatch.setattr("rose_lib.collages.click.edit", editfn)
     edit_release(config, release_id, resume_file=resume_file)
 
     # Assert the file got deleted.
diff --git a/rose_core/rule_parser.py b/rose_lib/rule_parser.py
similarity index 99%
rename from rose_core/rule_parser.py
rename to rose_lib/rule_parser.py
index ffe3d64..ccd3c03 100644
--- a/rose_core/rule_parser.py
+++ b/rose_lib/rule_parser.py
@@ -16,7 +16,7 @@
 
 import click
 
-from rose_core.common import RoseError, RoseExpectedError
+from rose_lib.common import RoseError, RoseExpectedError
 
 logger = logging.getLogger(__name__)
 
diff --git a/rose_core/rule_parser_test.py b/rose_lib/rule_parser_test.py
similarity index 99%
rename from rose_core/rule_parser_test.py
rename to rose_lib/rule_parser_test.py
index 3f3a3df..c70ec2d 100644
--- a/rose_core/rule_parser_test.py
+++ b/rose_lib/rule_parser_test.py
@@ -3,7 +3,7 @@
 import click
 import pytest
 
-from rose_core.rule_parser import (
+from rose_lib.rule_parser import (
     AddAction,
     DeleteAction,
     InvalidRuleError,
diff --git a/rose_core/rules.py b/rose_lib/rules.py
similarity index 99%
rename from rose_core/rules.py
rename to rose_lib/rules.py
index 8596026..7373677 100644
--- a/rose_core/rules.py
+++ b/rose_lib/rules.py
@@ -22,8 +22,8 @@
 
 import click
 
-from rose_core.audiotags import AudioTags
-from rose_core.cache import (
+from rose_lib.audiotags import AudioTags
+from rose_lib.cache import (
     CachedRelease,
     CachedTrack,
     connect,
@@ -31,9 +31,9 @@
     list_tracks,
     update_cache_for_releases,
 )
-from rose_core.common import Artist, RoseError, RoseExpectedError, uniq
-from rose_core.config import Config
-from rose_core.rule_parser import (
+from rose_lib.common import Artist, RoseError, RoseExpectedError, uniq
+from rose_lib.config import Config
+from rose_lib.rule_parser import (
     RELEASE_TAGS,
     AddAction,
     DeleteAction,
diff --git a/rose_core/rules_test.py b/rose_lib/rules_test.py
similarity index 97%
rename from rose_core/rules_test.py
rename to rose_lib/rules_test.py
index 1ff9847..5a980c9 100644
--- a/rose_core/rules_test.py
+++ b/rose_lib/rules_test.py
@@ -5,16 +5,16 @@
 
 import pytest
 
-from rose_core.audiotags import AudioTags
-from rose_core.cache import (
+from rose_lib.audiotags import AudioTags
+from rose_lib.cache import (
     list_releases,
     list_tracks,
     update_cache,
 )
-from rose_core.common import Artist
-from rose_core.config import Config
-from rose_core.rule_parser import MetadataMatcher, MetadataRule
-from rose_core.rules import (
+from rose_lib.common import Artist
+from rose_lib.config import Config
+from rose_lib.rule_parser import MetadataMatcher, MetadataRule
+from rose_lib.rules import (
     FastSearchResult,
     TrackTagNotAllowedError,
     execute_metadata_rule,
@@ -307,7 +307,7 @@ def test_chained_action(config: Config, source_dir: Path) -> None:
 @pytest.mark.timeout(2)
 def test_confirmation_yes(monkeypatch: Any, config: Config, source_dir: Path) -> None:
     rule = MetadataRule.parse("tracktitle:Track", ["replace:lalala"])
-    monkeypatch.setattr("rose_core.rules.click.confirm", lambda *_, **__: True)
+    monkeypatch.setattr("rose_lib.rules.click.confirm", lambda *_, **__: True)
     execute_metadata_rule(config, rule, confirm_yes=True)
     af = AudioTags.from_file(source_dir / "Test Release 1" / "01.m4a")
     assert af.title == "lalala"
@@ -316,7 +316,7 @@ def test_confirmation_yes(monkeypatch: Any, config: Config, source_dir: Path) ->
 @pytest.mark.timeout(2)
 def test_confirmation_no(monkeypatch: Any, config: Config, source_dir: Path) -> None:
     rule = MetadataRule.parse("tracktitle:Track", ["replace:lalala"])
-    monkeypatch.setattr("rose_core.rules.click.confirm", lambda *_, **__: False)
+    monkeypatch.setattr("rose_lib.rules.click.confirm", lambda *_, **__: False)
     execute_metadata_rule(config, rule, confirm_yes=True)
     af = AudioTags.from_file(source_dir / "Test Release 1" / "01.m4a")
     assert af.title != "lalala"
@@ -325,7 +325,7 @@ def test_confirmation_no(monkeypatch: Any, config: Config, source_dir: Path) ->
 @pytest.mark.timeout(2)
 def test_confirmation_count(monkeypatch: Any, config: Config, source_dir: Path) -> None:
     rule = MetadataRule.parse("tracktitle:Track", ["replace:lalala"])
-    monkeypatch.setattr("rose_core.rules.click.prompt", Mock(side_effect=["no", "8", "6"]))
+    monkeypatch.setattr("rose_lib.rules.click.prompt", Mock(side_effect=["no", "8", "6"]))
     # Abort.
     execute_metadata_rule(config, rule, confirm_yes=True, enter_number_to_confirm_above_count=1)
     af = AudioTags.from_file(source_dir / "Test Release 1" / "01.m4a")
diff --git a/rose_core/templates.py b/rose_lib/templates.py
similarity index 98%
rename from rose_core/templates.py
rename to rose_lib/templates.py
index e2e22cd..612a893 100644
--- a/rose_core/templates.py
+++ b/rose_lib/templates.py
@@ -16,11 +16,11 @@
 import click
 import jinja2
 
-from rose_core.common import Artist, ArtistMapping, RoseExpectedError
+from rose_lib.common import Artist, ArtistMapping, RoseExpectedError
 
 if typing.TYPE_CHECKING:
-    from rose_core.cache import CachedRelease, CachedTrack
-    from rose_core.config import Config
+    from rose_lib.cache import CachedRelease, CachedTrack
+    from rose_lib.config import Config
 
 RELEASE_TYPE_FORMATTER = {
     "album": "Album",
@@ -324,7 +324,7 @@ def preview_path_templates(c: Config) -> None:
 
 
 def _get_preview_releases(c: Config) -> tuple[CachedRelease, CachedRelease]:
-    from rose_core.cache import CachedRelease
+    from rose_lib.cache import CachedRelease
 
     kimlip = CachedRelease(
         id="018b268e-ff1e-7a0c-9ac8-7bbb282761f2",
@@ -375,7 +375,7 @@ def _preview_release_template(c: Config, label: str, template: PathTemplate) ->
 
 def _preview_track_template(c: Config, label: str, template: PathTemplate) -> None:
     # Import cycle trick :)
-    from rose_core.cache import CachedTrack
+    from rose_lib.cache import CachedTrack
 
     kimlip, youngforever = _get_preview_releases(c)
 
diff --git a/rose_core/templates_test.py b/rose_lib/templates_test.py
similarity index 96%
rename from rose_core/templates_test.py
rename to rose_lib/templates_test.py
index 137caf4..4759c7a 100644
--- a/rose_core/templates_test.py
+++ b/rose_lib/templates_test.py
@@ -4,10 +4,10 @@
 import click
 from click.testing import CliRunner
 
-from rose_core.cache import CachedRelease, CachedTrack
-from rose_core.common import Artist, ArtistMapping
-from rose_core.config import Config
-from rose_core.templates import (
+from rose_lib.cache import CachedRelease, CachedTrack
+from rose_lib.common import Artist, ArtistMapping
+from rose_lib.config import Config
+from rose_lib.templates import (
     PathTemplateConfig,
     eval_release_template,
     eval_track_template,
diff --git a/rose_core/tracks.py b/rose_lib/tracks.py
similarity index 85%
rename from rose_core/tracks.py
rename to rose_lib/tracks.py
index ff2d82c..c0de5fb 100644
--- a/rose_core/tracks.py
+++ b/rose_lib/tracks.py
@@ -7,15 +7,15 @@
 import json
 import logging
 
-from rose_core.audiotags import AudioTags
-from rose_core.cache import (
+from rose_lib.audiotags import AudioTags
+from rose_lib.cache import (
     get_track,
     list_tracks,
 )
-from rose_core.common import RoseExpectedError
-from rose_core.config import Config
-from rose_core.rule_parser import MetadataAction, MetadataMatcher
-from rose_core.rules import (
+from rose_lib.common import RoseExpectedError
+from rose_lib.config import Config
+from rose_lib.rule_parser import MetadataAction, MetadataMatcher
+from rose_lib.rules import (
     execute_metadata_actions,
     fast_search_for_matching_tracks,
     filter_track_false_positives_using_read_cache,
diff --git a/rose_core/tracks_test.py b/rose_lib/tracks_test.py
similarity index 97%
rename from rose_core/tracks_test.py
rename to rose_lib/tracks_test.py
index 92d3d53..827398b 100644
--- a/rose_core/tracks_test.py
+++ b/rose_lib/tracks_test.py
@@ -3,10 +3,10 @@
 
 import pytest
 
-from rose_core.audiotags import AudioTags
-from rose_core.config import Config
-from rose_core.rule_parser import MetadataAction, MetadataMatcher
-from rose_core.tracks import dump_all_tracks, dump_track, run_actions_on_track
+from rose_lib.audiotags import AudioTags
+from rose_lib.config import Config
+from rose_lib.rule_parser import MetadataAction, MetadataMatcher
+from rose_lib.tracks import dump_all_tracks, dump_track, run_actions_on_track
 
 
 def test_run_action_on_track(config: Config, source_dir: Path) -> None:
diff --git a/rose_core/watcher.py b/rose_lib/watcher.py
similarity index 99%
rename from rose_core/watcher.py
rename to rose_lib/watcher.py
index 0bca7e8..69e032d 100644
--- a/rose_core/watcher.py
+++ b/rose_lib/watcher.py
@@ -36,7 +36,7 @@
 )
 from watchdog.observers import Observer
 
-from rose_core.cache import (
+from rose_lib.cache import (
     update_cache_evict_nonexistent_collages,
     update_cache_evict_nonexistent_playlists,
     update_cache_evict_nonexistent_releases,
@@ -44,7 +44,7 @@
     update_cache_for_playlists,
     update_cache_for_releases,
 )
-from rose_core.config import Config
+from rose_lib.config import Config
 
 logger = logging.getLogger(__name__)
 
diff --git a/rose_core/watcher_test.py b/rose_lib/watcher_test.py
similarity index 98%
rename from rose_core/watcher_test.py
rename to rose_lib/watcher_test.py
index 043cb1b..fccf1f2 100644
--- a/rose_core/watcher_test.py
+++ b/rose_lib/watcher_test.py
@@ -5,9 +5,9 @@
 from multiprocessing import Process
 
 from conftest import TEST_COLLAGE_1, TEST_PLAYLIST_1, TEST_RELEASE_2, TEST_RELEASE_3, retry_for_sec
-from rose_core.cache import connect
-from rose_core.config import Config
-from rose_core.watcher import start_watchdog
+from rose_lib.cache import connect
+from rose_lib.config import Config
+from rose_lib.watcher import start_watchdog
 
 
 @contextmanager
diff --git a/rose_vfs/__init__.py b/rose_vfs/__init__.py
new file mode 100644
index 0000000..0d3dbaa
--- /dev/null
+++ b/rose_vfs/__init__.py
@@ -0,0 +1,9 @@
+from rose_lib import initialize_logging
+from rose_vfs.virtualfs import mount_virtualfs, unmount_virtualfs
+
+__all__ = [
+    "mount_virtualfs",
+    "unmount_virtualfs",
+]
+
+initialize_logging()
diff --git a/rose_core/virtualfs.py b/rose_vfs/virtualfs.py
similarity index 99%
rename from rose_core/virtualfs.py
rename to rose_vfs/virtualfs.py
index 5039fce..d62c1b9 100644
--- a/rose_core/virtualfs.py
+++ b/rose_vfs/virtualfs.py
@@ -52,15 +52,29 @@
 
 import llfuse
 
-from rose_core.audiotags import SUPPORTED_AUDIO_EXTENSIONS, AudioTags
-from rose_core.cache import (
+from rose_lib import (
     STORED_DATA_FILE_REGEX,
+    SUPPORTED_AUDIO_EXTENSIONS,
+    AudioTags,
     CachedRelease,
     CachedTrack,
+    Config,
+    PathTemplate,
+    RoseError,
+    add_release_to_collage,
+    add_track_to_playlist,
     artist_exists,
     calculate_release_logtext,
     calculate_track_logtext,
     collage_exists,
+    create_collage,
+    create_playlist,
+    delete_collage,
+    delete_playlist,
+    delete_playlist_cover_art,
+    delete_release,
+    eval_release_template,
+    eval_track_template,
     genre_exists,
     get_collage,
     get_path_of_track_in_playlist,
@@ -75,33 +89,18 @@
     list_genres,
     list_labels,
     list_playlists,
-    list_releases_delete_this,
     playlist_exists,
-    update_cache_for_releases,
-)
-from rose_core.collages import (
-    add_release_to_collage,
-    create_collage,
-    delete_collage,
     remove_release_from_collage,
-    rename_collage,
-)
-from rose_core.common import RoseError, sanitize_dirname, sanitize_filename
-from rose_core.config import Config
-from rose_core.playlists import (
-    add_track_to_playlist,
-    create_playlist,
-    delete_playlist,
-    delete_playlist_cover_art,
     remove_track_from_playlist,
+    rename_collage,
     rename_playlist,
+    sanitize_dirname,
+    sanitize_filename,
     set_playlist_cover_art,
-)
-from rose_core.releases import (
-    delete_release,
     set_release_cover_art,
+    update_cache_for_releases,
 )
-from rose_core.templates import PathTemplate, eval_release_template, eval_track_template
+from rose_lib.cache import list_releases_delete_this
 
 logger = logging.getLogger(__name__)
 
diff --git a/rose_core/virtualfs_test.py b/rose_vfs/virtualfs_test.py
similarity index 99%
rename from rose_core/virtualfs_test.py
rename to rose_vfs/virtualfs_test.py
index cddbe55..07d34f9 100644
--- a/rose_core/virtualfs_test.py
+++ b/rose_vfs/virtualfs_test.py
@@ -10,9 +10,9 @@
 import pytest
 
 from conftest import retry_for_sec
-from rose_core.audiotags import AudioTags
-from rose_core.config import Config
-from rose_core.virtualfs import mount_virtualfs, unmount_virtualfs
+from rose_lib.audiotags import AudioTags
+from rose_lib.config import Config
+from rose_vfs.virtualfs import mount_virtualfs, unmount_virtualfs
 
 R1_VNAME = "Techno Man & Bass Man - 2023. Release 1"
 R2_VNAME = "Violin Woman (feat. Conductor Woman) - 2021. Release 2"
diff --git a/setup.py b/setup.py
index d34ce64..ec005d2 100644
--- a/setup.py
+++ b/setup.py
@@ -1,6 +1,6 @@
 import setuptools
 
-with open("rose_core/.version") as f:
+with open("rose_lib/.version") as f:
     version = f.read().strip()
 
 setuptools.setup(
@@ -10,9 +10,9 @@
     author="blissful",
     author_email="blissful@sunsetglow.net",
     license="Apache-2.0",
-    entry_points={"console_scripts": ["rose = rose_core.__main__:main"]},
+    entry_points={"console_scripts": ["rose = rose_lib.__main__:main"]},
     packages=setuptools.find_namespace_packages(where="."),
-    package_data={"rose_core": ["*.sql", ".version"]},
+    package_data={"rose_lib": ["*.sql", ".version"]},
     install_requires=[
         "appdirs",
         "click",