feat: config file

refactor: as the config module changed
test: add test for config
test: add test for local fetcher and local enrichers
test: add test for manual insertion
fix: some random bugs left by the last commit

README.md

@@ -21,7 +21,7 @@ highest-confidence result wins.
 1. **Local** — sidecar `.lrc` files or embedded audio metadata (FLAC, MP3)
 2. **Cache Search** — fuzzy cross-album lookup in local cache
 3. **Spotify** — synced lyrics via Spotify's API
-   (requires `SPOTIFY_SP_DC` and Spotify trackid)
+   (requires `credentials.spotify_sp_dc` and Spotify trackid)
 4. **LRCLIB** — exact match from [lrclib.net](https://lrclib.net)
    (requires full metadata)
 5. **Musixmatch (Spotify)** — Musixmatch API with Spotify trackid
@@ -30,7 +30,7 @@ highest-confidence result wins.
 7. **Musixmatch** — Musixmatch API with metadata search (requires at least a title)
 8. **Netease** — Netease Cloud Music public API
 9. **QQ Music** — QQ Music via self-hosted API proxy
-   (requires `QQ_MUSIC_API_URL` that provides the same interface as [tooplick/qq-music-api](https://github.com/tooplick/qq-music-api))
+   (requires `credentials.qq_music_api_url`; compatible with [tooplick/qq-music-api](https://github.com/tooplick/qq-music-api))
 
 > I'm aware that Spotify's lyrics are provided by Musixmatch, but the fact is
 > that Musixmatch's own search will yield different (and more) results than
@@ -46,7 +46,7 @@ See `lrx --help` for full command reference. Common use cases:
   lrx fetch
   ```
 
-  targeting a specific player and a source to fetch from:
+  targeting a specific player and source:
 
   ```bash
   lrx fetch --player mpd --method lrclib-search
@@ -73,50 +73,71 @@ See `lrx --help` for full command reference. Common use cases:
   lrx export --output /path/to/lyrics.lrc
   ```
 
+- Watch active player and stream lyrics continuously to stdout:
+
+  ```bash
+  lrx watch pipe
+  lrx watch pipe --before 1 --after 2   # show context lines
+  ```
+
+  Control a running watch session:
+
+  ```bash
+  lrx watch ctl status                  # print session status as JSON
+  lrx watch ctl offset +200             # shift lyrics forward 200 ms
+  lrx watch ctl offset -150
+  ```
+
 - Cache management:
 
   ```bash
-  lrx cache stats                    # statistics
-  lrx cache query                    # inspect cache entries for current track
-  lrx cache clear                    # clear cache of current track
-  lrx cache clear --all              # clear entire cache
-  lrx cache confidence spotify 100   # manually set confidence for a source
+  lrx cache stats                       # statistics
+  lrx cache query                       # inspect cache entries for current track
+  lrx cache clear                       # clear cache of current track
+  lrx cache clear --all                 # clear entire cache
+  lrx cache confidence spotify 100      # manually set confidence for a source
   ```
 
-## Configuration
-
-Set credentials via environment variable or `.env` file:
-
-- `~/.config/lrx/.env` — user-level
-- `.env` in working directory — project-local
-- Shell environment — highest priority
-
-```env
-SPOTIFY_SP_DC=your_cookie_value
-MUSIXMATCH_USERTOKEN=your_musixmatch_usertoken
-QQ_MUSIC_API_URL=https://api.example.com
-PREFERRED_PLAYER=spotify
-```
-
-- `SPOTIFY_SP_DC` — required for Spotify source. Defaults to empty
-  (disabled Spotify source).
-- `MUSIXMATCH_USERTOKEN` — optional for Musixmatch sources
-  ([Curators Settings Page](https://curators.musixmatch.com/settings)
-  -> Login (if required)
-  -> "Copy debug info").
-  If not set, an anonymous token will be fetched at runtime.
-- `QQ_MUSIC_API_URL` — required for QQ Music source. Defaults to empty
-  (disabled QQ Music source).
-- `PREFERRED_PLAYER` — preferred MPRIS player when multiple are active.
-  Defaults to `spotify`. Only used when no `--player` flag is given and more
-  than one player (or none of them) is currently playing.
-
 Shell completion (zsh/fish/bash):
 
 ```bash
 lrx --install-completion
 ```
 
+## Configuration
+
+Configuration is read from `~/.config/lrx-cli/config.toml`. The file is
+optional; all values have defaults. Unknown keys are rejected with an error.
+
+```toml
+[general]
+preferred_player  = "spotify"       # preferred MPRIS player when multiple are active
+player_blacklist  = ["firefox", "zen", "chrome", "chromium", "vivaldi", "edge", "opera", "mpv"]
+http_timeout      = 10.0            # seconds
+
+[credentials]
+spotify_sp_dc         = ""          # required for Spotify source
+musixmatch_usertoken  = ""          # optional; anonymous token fetched if empty
+qq_music_api_url      = ""          # required for QQ Music source
+
+[watch]
+debounce_ms             = 400       # ms to wait after a track change before fetching
+calibration_interval_s  = 3.0       # seconds between full MPRIS position recalibrations
+position_tick_ms        = 50        # ms between local position ticks
+socket_path             = ""        # Unix socket path; defaults to <cache_dir>/watch.sock
+```
+
+**Credentials:**
+
+- `spotify_sp_dc` — `SP_DC` cookie from a logged-in Spotify web session. Required
+  for the Spotify source; leave empty to disable it.
+- `musixmatch_usertoken` — found at
+  [Curators Settings Page](https://curators.musixmatch.com/settings) → Login → "Copy debug info".
+  If empty, an anonymous token is fetched at runtime.
+- `qq_music_api_url` — base URL of a self-hosted
+  [qq-music-api](https://github.com/tooplick/qq-music-api) (compatible) instance. Required
+  for the QQ Music source; leave empty to disable it.
+
 ## Development
 
 Clone this repository:

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "lrx-cli"
-version = "0.6.4"
+version = "0.6.5"
 description = "Fetch line-synced lyrics for your music player."
 readme = "README.md"
 requires-python = ">=3.13"
@@ -14,8 +14,7 @@ dependencies = [
     "httpx>=0.28.1",
     "loguru>=0.7.3",
     "mutagen>=1.47.0",
-    "platformdirs>=4.9.4",
-    "python-dotenv>=1.2.2",
+    "platformdirs>=4.9.6",
 ]
 
 [project.scripts]

src/lrx_cli/authenticators/__init__.py

@@ -10,6 +10,7 @@ from .base import BaseAuthenticator
 from .spotify import SpotifyAuthenticator
 from .musixmatch import MusixmatchAuthenticator
 from .dummy import DummyAuthenticator
+from ..config import AppConfig
 
 __all__ = [
     "BaseAuthenticator",
@@ -20,11 +21,13 @@ __all__ = [
 ]
 
 
-def create_authenticators(cache) -> dict[str, BaseAuthenticator]:
-    """Factory function to create authenticators with cache access."""
+def create_authenticators(cache, config: AppConfig) -> dict[str, BaseAuthenticator]:
+    """Factory function to create authenticators with injected config."""
     return {
-        "dummy": DummyAuthenticator(),
-        "spotify": SpotifyAuthenticator(cache),
-        "musixmatch": MusixmatchAuthenticator(cache),
-        "qqmusic": QQMusicAuthenticator(),
+        "dummy": DummyAuthenticator(cache, config.credentials, config.general),
+        "spotify": SpotifyAuthenticator(cache, config.credentials, config.general),
+        "musixmatch": MusixmatchAuthenticator(
+            cache, config.credentials, config.general
+        ),
+        "qqmusic": QQMusicAuthenticator(cache, config.credentials, config.general),
     }

src/lrx_cli/authenticators/base.py

@@ -7,10 +7,20 @@ Description: Base class for credential authenticators.
 from abc import ABC, abstractmethod
 from typing import Optional
 
+from ..cache import CacheEngine
+from ..config import CredentialConfig, GeneralConfig
+
 
 class BaseAuthenticator(ABC):
     """Manages obtaining, caching, and refreshing a credential for one provider."""
 
+    def __init__(
+        self, cache: CacheEngine, credentials: CredentialConfig, general: GeneralConfig
+    ) -> None:
+        self._cache = cache
+        self._credentials = credentials
+        self._general = general
+
     @property
     @abstractmethod
     def name(self) -> str: ...

src/lrx_cli/authenticators/musixmatch.py

@@ -12,7 +12,7 @@ from loguru import logger
 
 from .base import BaseAuthenticator
 from ..cache import CacheEngine
-from ..config import HTTP_TIMEOUT, MUSIXMATCH_COOLDOWN_MS, credentials
+from ..config import CredentialConfig, GeneralConfig, MUSIXMATCH_COOLDOWN_MS
 
 _MUSIXMATCH_TOKEN_URL = "https://apic-desktop.musixmatch.com/ws/1.1/token.get"
 
@@ -24,8 +24,10 @@ _MXM_BASE_PARAMS = {
 
 
 class MusixmatchAuthenticator(BaseAuthenticator):
-    def __init__(self, cache: CacheEngine) -> None:
-        self._cache = cache
+    def __init__(
+        self, cache: CacheEngine, credentials: CredentialConfig, general: GeneralConfig
+    ) -> None:
+        super().__init__(cache, credentials, general)
         self._cached_token: Optional[str] = None
         self._cooldown_until_ms: int = 0
 
@@ -77,7 +79,7 @@ class MusixmatchAuthenticator(BaseAuthenticator):
         logger.debug("Musixmatch: fetching anonymous token")
 
         try:
-            async with httpx.AsyncClient(timeout=HTTP_TIMEOUT) as client:
+            async with httpx.AsyncClient(timeout=self._general.http_timeout) as client:
                 resp = await client.get(url, headers=_MXM_HEADERS)
                 resp.raise_for_status()
                 data = resp.json()
@@ -102,8 +104,8 @@ class MusixmatchAuthenticator(BaseAuthenticator):
 
     async def _get_token(self) -> Optional[str]:
         """Return a valid token: env var > memory > DB > fresh fetch."""
-        if credentials.MUSIXMATCH_USERTOKEN:
-            return credentials.MUSIXMATCH_USERTOKEN
+        if self._credentials.musixmatch_usertoken:
+            return self._credentials.musixmatch_usertoken
 
         if self._cached_token:
             return self._cached_token
@@ -139,7 +141,7 @@ class MusixmatchAuthenticator(BaseAuthenticator):
             self._set_cooldown()
             return None
 
-        async with httpx.AsyncClient(timeout=HTTP_TIMEOUT) as client:
+        async with httpx.AsyncClient(timeout=self._general.http_timeout) as client:
             url = f"{url_base}?{urlencode({**_MXM_BASE_PARAMS, **params, 'usertoken': token})}"
             resp = await client.get(url, headers=_MXM_HEADERS)
 

src/lrx_cli/authenticators/qqmusic.py

@@ -7,19 +7,22 @@ Description: QQ Music API authenticator - currently only a proxy.
 from typing import Optional
 
 from .base import BaseAuthenticator
-from ..config import credentials
+from ..cache import CacheEngine
+from ..config import CredentialConfig, GeneralConfig
 
 
 class QQMusicAuthenticator(BaseAuthenticator):
-    def __init__(self) -> None:
-        pass
+    def __init__(
+        self, cache: CacheEngine, credentials: CredentialConfig, general: GeneralConfig
+    ) -> None:
+        super().__init__(cache, credentials, general)
 
     @property
     def name(self) -> str:
         return "qqmusic"
 
     def is_configured(self) -> bool:
-        return bool(credentials.QQ_MUSIC_API_URL)
+        return bool(self._credentials.qq_music_api_url)
 
     async def authenticate(self) -> Optional[str]:
-        return credentials.QQ_MUSIC_API_URL
+        return self._credentials.qq_music_api_url.rstrip("/") or None

src/lrx_cli/authenticators/spotify.py

@@ -14,7 +14,7 @@ from loguru import logger
 
 from .base import BaseAuthenticator
 from ..cache import CacheEngine
-from ..config import HTTP_TIMEOUT, UA_BROWSER, credentials
+from ..config import CredentialConfig, GeneralConfig, UA_BROWSER
 
 _SPOTIFY_TOKEN_URL = "https://open.spotify.com/api/token"
 _SPOTIFY_SERVER_TIME_URL = "https://open.spotify.com/api/server-time"
@@ -32,8 +32,10 @@ SPOTIFY_BASE_HEADERS = {
 
 
 class SpotifyAuthenticator(BaseAuthenticator):
-    def __init__(self, cache: CacheEngine) -> None:
-        self._cache = cache
+    def __init__(
+        self, cache: CacheEngine, credentials: CredentialConfig, general: GeneralConfig
+    ) -> None:
+        super().__init__(cache, credentials, general)
         self._cached_secret: Optional[Tuple[str, int]] = None
         self._cached_token: Optional[str] = None
         self._token_expires_at: float = 0.0
@@ -43,7 +45,7 @@ class SpotifyAuthenticator(BaseAuthenticator):
         return "spotify"
 
     def is_configured(self) -> bool:
-        return bool(credentials.SPOTIFY_SP_DC)
+        return bool(self._credentials.spotify_sp_dc)
 
     @staticmethod
     def _generate_totp(server_time_s: int, secret: str) -> str:
@@ -82,7 +84,9 @@ class SpotifyAuthenticator(BaseAuthenticator):
 
     async def _get_server_time(self, client: httpx.AsyncClient) -> Optional[int]:
         try:
-            res = await client.get(_SPOTIFY_SERVER_TIME_URL, timeout=HTTP_TIMEOUT)
+            res = await client.get(
+                _SPOTIFY_SERVER_TIME_URL, timeout=self._general.http_timeout
+            )
             res.raise_for_status()
             data = res.json()
             if not isinstance(data, dict) or "serverTime" not in data:
@@ -100,7 +104,9 @@ class SpotifyAuthenticator(BaseAuthenticator):
             logger.debug("Spotify: using cached TOTP secret")
             return self._cached_secret
         try:
-            res = await client.get(_SPOTIFY_SECRET_URL, timeout=HTTP_TIMEOUT)
+            res = await client.get(
+                _SPOTIFY_SECRET_URL, timeout=self._general.http_timeout
+            )
             res.raise_for_status()
             data = res.json()
             if not isinstance(data, list) or len(data) == 0:
@@ -133,13 +139,13 @@ class SpotifyAuthenticator(BaseAuthenticator):
         if db_token and time.time() < self._token_expires_at - 30:
             return db_token
 
-        if not credentials.SPOTIFY_SP_DC:
-            logger.error("Spotify: SPOTIFY_SP_DC env var not set — cannot authenticate")
+        if not self._credentials.spotify_sp_dc:
+            logger.error("Spotify: spotify_sp_dc not configured — cannot authenticate")
             return None
 
         headers = {
             "Accept": "*/*",
-            "Cookie": f"sp_dc={credentials.SPOTIFY_SP_DC}",
+            "Cookie": f"sp_dc={self._credentials.spotify_sp_dc}",
             **SPOTIFY_BASE_HEADERS,
         }
 
@@ -166,7 +172,9 @@ class SpotifyAuthenticator(BaseAuthenticator):
 
             try:
                 res = await client.get(
-                    _SPOTIFY_TOKEN_URL, params=params, timeout=HTTP_TIMEOUT
+                    _SPOTIFY_TOKEN_URL,
+                    params=params,
+                    timeout=self._general.http_timeout,
                 )
                 if res.status_code != 200:
                     logger.error(f"Spotify: token request returned {res.status_code}")

src/lrx_cli/cache.py

@@ -85,9 +85,15 @@ class CacheEngine:
         self.db_path = db_path
         self._init_db()
 
+    def _connect(self) -> sqlite3.Connection:
+        conn = sqlite3.connect(self.db_path)
+        conn.execute("PRAGMA journal_mode=WAL")
+        conn.execute("PRAGMA busy_timeout=5000")
+        return conn
+
     def _init_db(self) -> None:
         """Create cache tables and run one-time slot/cache migrations."""
-        with sqlite3.connect(self.db_path) as conn:
+        with self._connect() as conn:
             conn.execute("""
                 CREATE TABLE IF NOT EXISTS credentials (
                     name TEXT PRIMARY KEY,
@@ -256,7 +262,7 @@ class CacheEngine:
             return []
 
         now = int(time.time())
-        with sqlite3.connect(self.db_path) as conn:
+        with self._connect() as conn:
             conn.execute(
                 "DELETE FROM cache WHERE key = ? AND expires_at IS NOT NULL AND expires_at < ?",
                 (key, now),
@@ -353,7 +359,7 @@ class CacheEngine:
             # Convenience for callers that still pass a single negative result.
             kinds = [SLOT_SYNCED, SLOT_UNSYNCED]
 
-        with sqlite3.connect(self.db_path) as conn:
+        with self._connect() as conn:
             for kind in kinds:
                 conn.execute(
                     """INSERT OR REPLACE INTO cache
@@ -386,7 +392,7 @@ class CacheEngine:
 
     def clear_all(self) -> None:
         """Remove every entry from the cache."""
-        with sqlite3.connect(self.db_path) as conn:
+        with self._connect() as conn:
             conn.execute("DELETE FROM cache")
             conn.commit()
         logger.info("Cache cleared.")
@@ -396,7 +402,7 @@ class CacheEngine:
         if not self._track_has_meta(track):
             logger.info(f"No cache entries found for {track.display_name()}.")
             return
-        with sqlite3.connect(self.db_path) as conn:
+        with self._connect() as conn:
             cur = conn.execute(
                 f"DELETE FROM cache WHERE {_TRACK_WHERE}",
                 _track_where_params(track),
@@ -411,7 +417,7 @@ class CacheEngine:
 
     def prune(self) -> int:
         """Remove all expired entries. Returns the number of rows deleted."""
-        with sqlite3.connect(self.db_path) as conn:
+        with self._connect() as conn:
             cur = conn.execute(
                 "DELETE FROM cache WHERE expires_at IS NOT NULL AND expires_at < ?",
                 (int(time.time()),),
@@ -439,7 +445,7 @@ class CacheEngine:
             return None
 
         now = int(time.time())
-        with sqlite3.connect(self.db_path) as conn:
+        with self._connect() as conn:
             conn.row_factory = sqlite3.Row
             rows = conn.execute(
                 f"SELECT status, lyrics, source, confidence FROM cache"
@@ -495,7 +501,7 @@ class CacheEngine:
             return []
 
         now = int(time.time())
-        with sqlite3.connect(self.db_path) as conn:
+        with self._connect() as conn:
             conn.row_factory = sqlite3.Row
             rows = conn.execute(
                 """SELECT * FROM cache
@@ -557,7 +563,7 @@ class CacheEngine:
         """
         if not self._track_has_meta(track):
             return 0
-        with sqlite3.connect(self.db_path) as conn:
+        with self._connect() as conn:
             cur = conn.execute(
                 f"UPDATE cache SET confidence = ? WHERE {_TRACK_WHERE} AND source = ?",
                 [confidence] + _track_where_params(track) + [source],
@@ -571,7 +577,7 @@ class CacheEngine:
         """Return all cached rows for a given track (across all sources)."""
         if not self._track_has_meta(track):
             return []
-        with sqlite3.connect(self.db_path) as conn:
+        with self._connect() as conn:
             conn.row_factory = sqlite3.Row
             return [
                 dict(r)
@@ -586,7 +592,7 @@ class CacheEngine:
     def get_credential(self, name: str) -> Optional[dict]:
         """Return cached credential data if present and not expired."""
         now_ms = int(time.time() * 1000)
-        with sqlite3.connect(self.db_path) as conn:
+        with self._connect() as conn:
             conn.row_factory = sqlite3.Row
             row = conn.execute(
                 "SELECT data FROM credentials WHERE name = ? AND (expires_at IS NULL OR expires_at > ?)",
@@ -603,7 +609,7 @@ class CacheEngine:
         self, name: str, data: dict, expires_at_ms: Optional[int] = None
     ) -> None:
         """Persist credential data, optionally with an expiry timestamp (Unix ms)."""
-        with sqlite3.connect(self.db_path) as conn:
+        with self._connect() as conn:
             conn.execute(
                 "INSERT OR REPLACE INTO credentials (name, data, expires_at) VALUES (?, ?, ?)",
                 (name, json.dumps(data), expires_at_ms),
@@ -612,14 +618,14 @@ class CacheEngine:
 
     def query_all(self) -> list[dict]:
         """Return every row in the cache table."""
-        with sqlite3.connect(self.db_path) as conn:
+        with self._connect() as conn:
             conn.row_factory = sqlite3.Row
             return [dict(r) for r in conn.execute("SELECT * FROM cache").fetchall()]
 
     def stats(self) -> dict:
         """Return aggregate cache statistics."""
         now = int(time.time())
-        with sqlite3.connect(self.db_path) as conn:
+        with self._connect() as conn:
             total = conn.execute("SELECT COUNT(*) FROM cache").fetchone()[0]
             expired = conn.execute(
                 "SELECT COUNT(*) FROM cache WHERE expires_at IS NOT NULL AND expires_at < ?",

src/lrx_cli/cli.py

@@ -7,18 +7,28 @@ Description: CLI interface.
 import sys
 import time
 import os
+import asyncio
+import json
 from pathlib import Path
 from typing import Annotated
 from urllib.parse import quote
 import cyclopts
 from loguru import logger
 
-from .config import DB_PATH, enable_debug
+from .config import (
+    DB_PATH,
+    AppConfig,
+    load_config,
+    enable_debug,
+)
 from .models import TrackMeta
 from .mpris import get_current_track
 from .core import LrcManager
 from .fetchers import FetcherMethodType
 from .lrc import get_sidecar_path
+from .watch import WatchCoordinator
+from .watch.control import ControlClient, parse_delta
+from .watch.view.pipe import PipeOutput
 
 
 app = cyclopts.App(
@@ -29,10 +39,17 @@ app.register_install_completion_command()
 cache_app = cyclopts.App(name="cache", help="Manage the local SQLite cache.")
 app.command(cache_app)
 
+watch_app = cyclopts.App(name="watch", help="Watch MPRIS and output lyrics.")
+app.command(watch_app)
+
+ctl_app = cyclopts.App(name="ctl", help="Control a running watch session.")
+watch_app.command(ctl_app)
+
 
 # Global state set by the meta launcher
 _player: str | None = None
 _db_path: str | None = None
+_app_config: AppConfig = AppConfig()
 
 # Will be initialized before any command runs, safe to set to None here
 manager: LrcManager = None  # type: ignore
@@ -62,13 +79,13 @@ def launcher(
         ),
     ] = None,
 ):
-    global _player, _db_path
+    global _player, _db_path, _app_config, manager
     if debug:
         enable_debug()
     _player = player
     _db_path = str(Path(db_path).resolve()) if db_path else DB_PATH
-    global manager
-    manager = LrcManager(db_path=_db_path)
+    _app_config = load_config()
+    manager = LrcManager(db_path=_db_path, config=_app_config)
     app(tokens)
 
 
@@ -114,7 +131,11 @@ def fetch(
     ] = False,
 ):
     """Fetch and print lyrics for the currently playing track."""
-    track = get_current_track(_player)
+    track = get_current_track(
+        _player,
+        preferred_player=_app_config.general.preferred_player,
+        player_blacklist=_app_config.general.player_blacklist,
+    )
 
     if not track:
         logger.error("No active playing track found.")
@@ -298,7 +319,11 @@ def export(
     ] = False,
 ):
     """Export lyrics of the current track to a .lrc file."""
-    track = get_current_track(_player)
+    track = get_current_track(
+        _player,
+        preferred_player=_app_config.general.preferred_player,
+        player_blacklist=_app_config.general.player_blacklist,
+    )
     if not track:
         logger.error("No active playing track found.")
         sys.exit(1)
@@ -357,6 +382,73 @@ def export(
         sys.exit(1)
 
 
+# watch subcommands
+
+
+@watch_app.command
+def pipe(
+    before: Annotated[
+        int,
+        cyclopts.Parameter(
+            name="--before",
+            help="Number of lyric lines to show before current line.",
+        ),
+    ] = 0,
+    after: Annotated[
+        int,
+        cyclopts.Parameter(
+            name="--after",
+            help="Number of lyric lines to show after current line.",
+        ),
+    ] = 0,
+):
+    """Watch active player and continuously print lyric window to stdout."""
+    logger.info(
+        "Starting watch pipe (player filter: {})",
+        _player or "<none>",
+    )
+    output = PipeOutput(before=max(0, before), after=max(0, after))
+    try:
+        session = WatchCoordinator(
+            manager,
+            output,
+            player_hint=_player,
+            config=_app_config,
+        )
+        success = asyncio.run(session.run())
+        if not success:
+            sys.exit(1)
+    except KeyboardInterrupt:
+        logger.info("Watch stopped.")
+
+
+@ctl_app.command
+def offset(delta: str) -> None:
+    """Adjust watch offset. Examples: +200, -200, 0."""
+    parsed_ok, parsed_delta, parse_error = parse_delta(delta)
+    if not parsed_ok or parsed_delta is None:
+        logger.error(parse_error or "Invalid offset delta")
+        sys.exit(1)
+
+    response = ControlClient(config=_app_config).send(
+        {"cmd": "offset", "delta": parsed_delta}
+    )
+    if not response.get("ok"):
+        logger.error(response.get("error", "Unknown error"))
+        sys.exit(1)
+    print(json.dumps(response, indent=2, ensure_ascii=False))
+
+
+@ctl_app.command
+def status() -> None:
+    """Print current watch session status as JSON."""
+    response = ControlClient(config=_app_config).send({"cmd": "status"})
+    if not response.get("ok"):
+        logger.error(response.get("error", "Unknown error"))
+        sys.exit(1)
+    print(json.dumps(response, indent=2, ensure_ascii=False))
+
+
 # cache subcommands
 
 
@@ -379,7 +471,11 @@ def query(
             print()
         return
 
-    track = get_current_track(_player)
+    track = get_current_track(
+        _player,
+        preferred_player=_app_config.general.preferred_player,
+        player_blacklist=_app_config.general.player_blacklist,
+    )
     if not track:
         logger.error("No active playing track found.")
         sys.exit(1)
@@ -399,7 +495,11 @@ def clear(
         manager.cache.clear_all()
         return
 
-    track = get_current_track(_player)
+    track = get_current_track(
+        _player,
+        preferred_player=_app_config.general.preferred_player,
+        player_blacklist=_app_config.general.player_blacklist,
+    )
     if not track:
         logger.error("No active playing track found.")
         sys.exit(1)
@@ -489,7 +589,11 @@ def confidence(
         logger.error("Score must be between 0 and 100.")
         sys.exit(1)
 
-    track = get_current_track(_player)
+    track = get_current_track(
+        _player,
+        preferred_player=_app_config.general.preferred_player,
+        player_blacklist=_app_config.general.player_blacklist,
+    )
     if not track:
         logger.error("No active playing track found.")
         sys.exit(1)
@@ -513,7 +617,11 @@ def insert(
     ] = None,
 ):
     """Manually insert lyrics into the cache for the current track."""
-    track = get_current_track(_player)
+    track = get_current_track(
+        _player,
+        preferred_player=_app_config.general.preferred_player,
+        player_blacklist=_app_config.general.player_blacklist,
+    )
     if not track:
         logger.error("No active playing track found.")
         sys.exit(1)

src/lrx_cli/config.py

@@ -1,14 +1,18 @@
 """
 Author: Uyanide pywang0608@foxmail.com
 Date: 2026-03-25 10:17:56
-Description: Global configuration constants and logger setup.
+Description: Global configuration constants, typed config dataclasses, and logger setup.
 """
 
+import dataclasses
 import os
 import sys
+import tomllib
+from dataclasses import dataclass, field
 from pathlib import Path
+from typing import Any, get_type_hints
+
 from platformdirs import user_cache_dir, user_config_dir
-from dotenv import load_dotenv
 from loguru import logger
 from importlib.metadata import version
 
@@ -24,13 +28,7 @@ DB_PATH = os.path.join(CACHE_DIR, "cache.db")
 SLOT_SYNCED = "SYNCED"
 SLOT_UNSYNCED = "UNSYNCED"
 
-# .env loading
-_config_env = Path(user_config_dir(APP_NAME, APP_AUTHOR)) / ".env"
-load_dotenv(_config_env)  # ~/.config/lrx-cli/.env
-load_dotenv()  # .env in cwd (does NOT override existing vars)
-
-# HTTP
-HTTP_TIMEOUT = 10.0
+_WATCH_SOCKET_PATH = str(Path(CACHE_DIR) / "watch.sock")
 
 # Cache TTLs (seconds)
 TTL_SYNCED = None  # never expires
@@ -66,36 +64,131 @@ UA_LRX = f"LRX-CLI {APP_VERSION} (https://github.com/Uyanide/lrx-cli)"
 
 MUSIXMATCH_COOLDOWN_MS = 600_000  # 10 minutes
 
-# Player preference (used when multiple MPRIS players are active)
-PREFERRED_PLAYER = os.environ.get("PREFERRED_PLAYER", "spotify")
-
-
-class _Credentials:
-    """Credential config with lazy os.environ reads.
-
-    Stable constants live as module-level names above.
-    Credentials are @property so monkeypatch.setenv / monkeypatch.delenv
-    affect them without needing to patch each consumer separately.
-    """
-
-    @property
-    def SPOTIFY_SP_DC(self) -> str:
-        return os.environ.get("SPOTIFY_SP_DC", "")
-
-    @property
-    def QQ_MUSIC_API_URL(self) -> str:
-        return os.environ.get("QQ_MUSIC_API_URL", "").rstrip("/")
-
-    @property
-    def MUSIXMATCH_USERTOKEN(self) -> str:
-        return os.environ.get("MUSIXMATCH_USERTOKEN", "")
-
-
-credentials = _Credentials()
-
 os.makedirs(CACHE_DIR, exist_ok=True)
 
-# Logger
+
+DEFAULT_PREFERRED_PLAYER = "spotify"
+DEFAULT_PLAYER_BLACKLIST: tuple[str, ...] = (
+    "firefox",
+    "zen",
+    "chrome",
+    "chromium",
+    "vivaldi",
+    "edge",
+    "opera",
+    "mpv",
+)
+
+
+@dataclass(frozen=True)
+class GeneralConfig:
+    preferred_player: str = DEFAULT_PREFERRED_PLAYER
+    player_blacklist: tuple[str, ...] = DEFAULT_PLAYER_BLACKLIST
+    http_timeout: float = 10.0
+
+
+@dataclass(frozen=True)
+class CredentialConfig:
+    spotify_sp_dc: str = ""
+    musixmatch_usertoken: str = ""
+    qq_music_api_url: str = ""
+
+
+@dataclass(frozen=True)
+class WatchConfig:
+    debounce_ms: int = 400
+    calibration_interval_s: float = 3.0
+    position_tick_ms: int = 50
+    socket_path: str = field(default_factory=lambda: _WATCH_SOCKET_PATH)
+
+
+@dataclass(frozen=True)
+class AppConfig:
+    general: GeneralConfig = field(default_factory=GeneralConfig)
+    credentials: CredentialConfig = field(default_factory=CredentialConfig)
+    watch: WatchConfig = field(default_factory=WatchConfig)
+
+
+_CONFIG_PATH = Path(user_config_dir(APP_NAME, APP_AUTHOR)) / "config.toml"
+
+
+def _coerce(val: Any, hint: Any, section: str, name: str) -> Any:
+    """Coerce and validate one TOML value against its declared field type."""
+    if hint is str:
+        if not isinstance(val, str):
+            raise ValueError(
+                f"[{section}].{name}: expected str, got {type(val).__name__}"
+            )
+        return val
+    if hint is int:
+        if not isinstance(val, int) or isinstance(val, bool):
+            raise ValueError(
+                f"[{section}].{name}: expected int, got {type(val).__name__}"
+            )
+        return val
+    if hint is float:
+        if isinstance(val, bool):
+            raise ValueError(f"[{section}].{name}: expected float, got bool")
+        if isinstance(val, (int, float)):
+            return float(val)
+        raise ValueError(
+            f"[{section}].{name}: expected float, got {type(val).__name__}"
+        )
+    origin = getattr(hint, "__origin__", None)
+    if origin is tuple:
+        if not isinstance(val, list):
+            raise ValueError(
+                f"[{section}].{name}: expected array, got {type(val).__name__}"
+            )
+        for i, item in enumerate(val):
+            if not isinstance(item, str):
+                raise ValueError(
+                    f"[{section}].{name}[{i}]: expected str, got {type(item).__name__}"
+                )
+        return tuple(val)
+    raise ValueError(f"[{section}].{name}: unsupported field type {hint!r}")
+
+
+def _parse_section(raw: dict[str, Any], cls: type, section: str) -> Any:
+    """Parse one TOML section dict into a frozen dataclass, rejecting unknown keys."""
+    fields_map = {f.name: f for f in dataclasses.fields(cls)}
+    hints = get_type_hints(cls)
+
+    unknown = set(raw) - set(fields_map)
+    if unknown:
+        raise ValueError(
+            f"Unknown config keys in [{section}]: {', '.join(sorted(unknown))}"
+        )
+
+    kwargs: dict[str, Any] = {}
+    for name, f in fields_map.items():
+        if name not in raw:
+            if f.default is not dataclasses.MISSING:
+                kwargs[name] = f.default
+            elif f.default_factory is not dataclasses.MISSING:  # type: ignore[misc]
+                kwargs[name] = f.default_factory()
+            continue
+        kwargs[name] = _coerce(raw[name], hints[name], section, name)
+
+    return cls(**kwargs)
+
+
+def load_config(path: Path | None = None) -> AppConfig:
+    """Load AppConfig from TOML file; return all-defaults when file is absent."""
+    resolved = path or _CONFIG_PATH
+    if not resolved.exists():
+        return AppConfig()
+    with open(resolved, "rb") as f:
+        data = tomllib.load(f)
+    return AppConfig(
+        general=_parse_section(data.get("general", {}), GeneralConfig, "general"),
+        credentials=_parse_section(
+            data.get("credentials", {}), CredentialConfig, "credentials"
+        ),
+        watch=_parse_section(data.get("watch", {}), WatchConfig, "watch"),
+    )
+
+
 _LOG_FORMAT = (
     "<green>{time:YYYY-MM-DD HH:mm:ss}</green> | "
     "<level>{level: <8}</level> | "

src/lrx_cli/core.py

@@ -22,6 +22,7 @@ from .config import (
     HIGH_CONFIDENCE,
     SLOT_SYNCED,
     SLOT_UNSYNCED,
+    AppConfig,
 )
 from .models import TrackMeta, LyricResult, CacheStatus
 from .enrichers import create_enrichers, enrich_track
@@ -92,10 +93,10 @@ def _has_negative_for_both_slots(cached_rows: list[LyricResult]) -> bool:
 class LrcManager:
     """Main entry point for fetching lyrics with caching."""
 
-    def __init__(self, db_path: str) -> None:
+    def __init__(self, db_path: str, config: AppConfig = AppConfig()) -> None:
         self.cache = CacheEngine(db_path=db_path)
-        self.authenticators = create_authenticators(self.cache)
-        self.fetchers = create_fetchers(self.cache, self.authenticators)
+        self.authenticators = create_authenticators(self.cache, config)
+        self.fetchers = create_fetchers(self.cache, self.authenticators, config)
         self.enrichers = create_enrichers(self.authenticators)
 
     async def _run_group(

src/lrx_cli/fetchers/__init__.py

@@ -23,6 +23,7 @@ from ..authenticators import (
     QQMusicAuthenticator,
 )
 from ..cache import CacheEngine
+from ..config import AppConfig
 from ..models import TrackMeta
 
 FetcherMethodType = Literal[
@@ -52,26 +53,27 @@ _FETCHER_GROUPS: list[list[FetcherMethodType]] = [
 def create_fetchers(
     cache: CacheEngine,
     authenticators: dict[str, BaseAuthenticator],
+    config: AppConfig,
 ) -> dict[FetcherMethodType, BaseFetcher]:
     """Instantiate all fetchers. Returns a dict keyed by source name."""
     spotify_auth = authenticators["spotify"]
     mxm_auth = authenticators["musixmatch"]
-    qqmusic_auth = authenticators.get("qqmusic")
+    qqmusic_auth = authenticators["qqmusic"]
     assert isinstance(spotify_auth, SpotifyAuthenticator)
     assert isinstance(mxm_auth, MusixmatchAuthenticator)
     assert isinstance(qqmusic_auth, QQMusicAuthenticator)
-    fetchers: dict[FetcherMethodType, BaseFetcher] = {
-        "local": LocalFetcher(),
+    g = config.general
+    return {
+        "local": LocalFetcher(g),
         "cache-search": CacheSearchFetcher(cache),
-        "spotify": SpotifyFetcher(spotify_auth),
-        "lrclib": LrclibFetcher(),
-        "musixmatch-spotify": MusixmatchSpotifyFetcher(mxm_auth),
-        "lrclib-search": LrclibSearchFetcher(),
-        "netease": NeteaseFetcher(),
-        "qqmusic": QQMusicFetcher(qqmusic_auth),
-        "musixmatch": MusixmatchFetcher(mxm_auth),
+        "spotify": SpotifyFetcher(g, spotify_auth),
+        "lrclib": LrclibFetcher(g),
+        "musixmatch-spotify": MusixmatchSpotifyFetcher(g, mxm_auth),
+        "lrclib-search": LrclibSearchFetcher(g),
+        "netease": NeteaseFetcher(g),
+        "qqmusic": QQMusicFetcher(g, qqmusic_auth),
+        "musixmatch": MusixmatchFetcher(g, mxm_auth),
     }
-    return fetchers
 
 
 def build_plan(

src/lrx_cli/fetchers/base.py

@@ -8,6 +8,8 @@ from abc import ABC, abstractmethod
 from typing import Optional
 from dataclasses import dataclass
 
+from ..authenticators.base import BaseAuthenticator
+from ..config import GeneralConfig
 from ..models import CacheStatus, TrackMeta, LyricResult
 
 
@@ -38,6 +40,12 @@ class FetchResult:
 
 
 class BaseFetcher(ABC):
+    def __init__(
+        self, general: GeneralConfig, auth: Optional[BaseAuthenticator] = None
+    ) -> None:
+        self._general = general
+        self._auth = auth
+
     @property
     @abstractmethod
     def source_name(self) -> str:

src/lrx_cli/fetchers/lrclib.py

@@ -13,7 +13,6 @@ from .base import BaseFetcher, FetchResult
 from ..models import TrackMeta, LyricResult, CacheStatus
 from ..lrc import LRCData
 from ..config import (
-    HTTP_TIMEOUT,
     TTL_UNSYNCED,
     TTL_NOT_FOUND,
     UA_LRX,
@@ -46,7 +45,7 @@ class LrclibFetcher(BaseFetcher):
         logger.info(f"LRCLIB: fetching lyrics for {track.display_name()}")
 
         try:
-            async with httpx.AsyncClient(timeout=HTTP_TIMEOUT) as client:
+            async with httpx.AsyncClient(timeout=self._general.http_timeout) as client:
                 resp = await client.get(url, headers={"User-Agent": UA_LRX})
 
             if resp.status_code == 404:

src/lrx_cli/fetchers/lrclib_search.py

@@ -15,7 +15,6 @@ from .selection import SearchCandidate, select_best
 from ..models import TrackMeta, LyricResult, CacheStatus
 from ..lrc import LRCData
 from ..config import (
-    HTTP_TIMEOUT,
     TTL_UNSYNCED,
     TTL_NOT_FOUND,
     UA_LRX,
@@ -73,7 +72,7 @@ class LrclibSearchFetcher(BaseFetcher):
         had_error = False
 
         try:
-            async with httpx.AsyncClient(timeout=HTTP_TIMEOUT) as client:
+            async with httpx.AsyncClient(timeout=self._general.http_timeout) as client:
 
                 async def _query(params: dict[str, str]) -> tuple[list[dict], bool]:
                     url = f"{_LRCLIB_SEARCH_URL}?{urlencode(params)}"

src/lrx_cli/fetchers/musixmatch.py

@@ -18,6 +18,7 @@ from loguru import logger
 from .base import BaseFetcher, FetchResult
 from .selection import SearchCandidate, select_best
 from ..authenticators.musixmatch import MusixmatchAuthenticator
+from ..config import GeneralConfig
 from ..lrc import LRCData
 from ..models import CacheStatus, LyricResult, TrackMeta
 
@@ -145,22 +146,24 @@ async def _fetch_macro(
 class MusixmatchSpotifyFetcher(BaseFetcher):
     """Direct lookup by Spotify track ID — no search, single request."""
 
-    def __init__(self, auth: MusixmatchAuthenticator) -> None:
-        self.auth = auth
+    _auth: MusixmatchAuthenticator
+
+    def __init__(self, general: GeneralConfig, auth: MusixmatchAuthenticator) -> None:
+        super().__init__(general, auth)
 
     @property
     def source_name(self) -> str:
         return "musixmatch-spotify"
 
     def is_available(self, track: TrackMeta) -> bool:
-        return bool(track.trackid) and not self.auth.is_cooldown()
+        return bool(track.trackid) and not self._auth.is_cooldown()
 
     async def fetch(self, track: TrackMeta, bypass_cache: bool = False) -> FetchResult:
         logger.info(f"Musixmatch-Spotify: fetching lyrics for {track.display_name()}")
 
         try:
             lrc = await _fetch_macro(
-                self.auth,
+                self._auth,
                 {"track_spotify_id": track.trackid},  # type: ignore[dict-item]
             )
         except AttributeError:
@@ -191,8 +194,10 @@ class MusixmatchSpotifyFetcher(BaseFetcher):
 class MusixmatchFetcher(BaseFetcher):
     """Metadata search + best-candidate lyric fetch."""
 
-    def __init__(self, auth: MusixmatchAuthenticator) -> None:
-        self.auth = auth
+    _auth: MusixmatchAuthenticator
+
+    def __init__(self, general: GeneralConfig, auth: MusixmatchAuthenticator) -> None:
+        super().__init__(general, auth)
 
     @property
     def source_name(self) -> str:
@@ -203,7 +208,7 @@ class MusixmatchFetcher(BaseFetcher):
         return "musixmatch"
 
     def is_available(self, track: TrackMeta) -> bool:
-        return bool(track.title) and not self.auth.is_cooldown()
+        return bool(track.title) and not self._auth.is_cooldown()
 
     async def _search(self, track: TrackMeta) -> tuple[Optional[int], float]:
         """Search for track metadata. Raises on network/HTTP errors."""
@@ -218,7 +223,7 @@ class MusixmatchFetcher(BaseFetcher):
             params["q_album"] = track.album
 
         logger.debug(f"Musixmatch: searching for '{track.display_name()}'")
-        data = await self.auth.get_json(_MUSIXMATCH_SEARCH_URL, params)
+        data = await self._auth.get_json(_MUSIXMATCH_SEARCH_URL, params)
         if data is None:
             return None, 0.0
 
@@ -270,7 +275,7 @@ class MusixmatchFetcher(BaseFetcher):
                 return FetchResult.from_not_found()
 
             lrc = await _fetch_macro(
-                self.auth,
+                self._auth,
                 {"commontrack_id": str(commontrack_id)},
             )
         except AttributeError:

src/lrx_cli/fetchers/netease.py

@@ -16,7 +16,6 @@ from .selection import SearchCandidate, select_ranked
 from ..models import TrackMeta, LyricResult, CacheStatus
 from ..lrc import LRCData
 from ..config import (
-    HTTP_TIMEOUT,
     TTL_NOT_FOUND,
     MULTI_CANDIDATE_DELAY_S,
     UA_BROWSER,
@@ -49,7 +48,7 @@ class NeteaseFetcher(BaseFetcher):
         logger.debug(f"Netease: searching for '{query}' (limit={limit})")
 
         try:
-            async with httpx.AsyncClient(timeout=HTTP_TIMEOUT) as client:
+            async with httpx.AsyncClient(timeout=self._general.http_timeout) as client:
                 resp = await client.post(
                     _NETEASE_SEARCH_URL,
                     headers=_NETEASE_BASE_HEADERS,
@@ -114,7 +113,7 @@ class NeteaseFetcher(BaseFetcher):
         logger.debug(f"Netease: fetching lyrics for song_id={song_id}")
 
         try:
-            async with httpx.AsyncClient(timeout=HTTP_TIMEOUT) as client:
+            async with httpx.AsyncClient(timeout=self._general.http_timeout) as client:
                 resp = await client.post(
                     _NETEASE_LYRIC_URL,
                     headers=_NETEASE_BASE_HEADERS,

src/lrx_cli/fetchers/qqmusic.py

@@ -18,7 +18,7 @@ from .selection import SearchCandidate, select_ranked
 from ..models import TrackMeta, LyricResult, CacheStatus
 from ..lrc import LRCData
 from ..config import (
-    HTTP_TIMEOUT,
+    GeneralConfig,
     TTL_NOT_FOUND,
     MULTI_CANDIDATE_DELAY_S,
 )
@@ -29,15 +29,17 @@ from ..authenticators import QQMusicAuthenticator
 
 
 class QQMusicFetcher(BaseFetcher):
-    def __init__(self, auth: QQMusicAuthenticator) -> None:
-        self.auth = auth
+    _auth: QQMusicAuthenticator
+
+    def __init__(self, general: GeneralConfig, auth: QQMusicAuthenticator) -> None:
+        super().__init__(general, auth)
 
     @property
     def source_name(self) -> str:
         return "qqmusic"
 
     def is_available(self, track: TrackMeta) -> bool:
-        return bool(track.title) and self.auth.is_configured()
+        return bool(track.title) and self._auth.is_configured()
 
     async def _search(
         self, track: TrackMeta, limit: int = 10
@@ -49,9 +51,9 @@ class QQMusicFetcher(BaseFetcher):
         logger.debug(f"QQMusic: searching for '{query}' (limit={limit})")
 
         try:
-            async with httpx.AsyncClient(timeout=HTTP_TIMEOUT) as client:
+            async with httpx.AsyncClient(timeout=self._general.http_timeout) as client:
                 resp = await client.get(
-                    f"{await self.auth.authenticate()}{_QQ_MUSIC_API_SEARCH_ENDPOINT}",
+                    f"{await self._auth.authenticate()}{_QQ_MUSIC_API_SEARCH_ENDPOINT}",
                     params={"keyword": query, "type": "song", "num": limit},
                 )
                 resp.raise_for_status()
@@ -106,9 +108,9 @@ class QQMusicFetcher(BaseFetcher):
         logger.debug(f"QQMusic: fetching lyrics for mid={mid}")
 
         try:
-            async with httpx.AsyncClient(timeout=HTTP_TIMEOUT) as client:
+            async with httpx.AsyncClient(timeout=self._general.http_timeout) as client:
                 resp = await client.get(
-                    f"{await self.auth.authenticate()}{_QQ_MUSIC_API_LYRIC_ENDPOINT}",
+                    f"{await self._auth.authenticate()}{_QQ_MUSIC_API_LYRIC_ENDPOINT}",
                     params={"mid": mid},
                 )
                 resp.raise_for_status()
@@ -154,7 +156,7 @@ class QQMusicFetcher(BaseFetcher):
             return FetchResult.from_network_error()
 
     async def fetch(self, track: TrackMeta, bypass_cache: bool = False) -> FetchResult:
-        if not self.auth.is_configured():
+        if not self._auth.is_configured():
             logger.debug("QQMusic: skipped — Auth not configured")
             return FetchResult()
 

src/lrx_cli/fetchers/spotify.py

@@ -11,21 +11,23 @@ from .base import BaseFetcher, FetchResult
 from ..authenticators.spotify import SpotifyAuthenticator, SPOTIFY_BASE_HEADERS
 from ..models import TrackMeta, LyricResult, CacheStatus
 from ..lrc import LRCData
-from ..config import HTTP_TIMEOUT, TTL_NOT_FOUND
+from ..config import GeneralConfig, TTL_NOT_FOUND
 
 _SPOTIFY_LYRICS_URL = "https://spclient.wg.spotify.com/color-lyrics/v2/track/"
 
 
 class SpotifyFetcher(BaseFetcher):
-    def __init__(self, auth: SpotifyAuthenticator) -> None:
-        self.auth = auth
+    def __init__(self, general: GeneralConfig, auth: SpotifyAuthenticator) -> None:
+        super().__init__(general, auth)
+
+    _auth: SpotifyAuthenticator
 
     @property
     def source_name(self) -> str:
         return "spotify"
 
     def is_available(self, track: TrackMeta) -> bool:
-        return bool(track.trackid) and self.auth.is_configured()
+        return bool(track.trackid) and self._auth.is_configured()
 
     @staticmethod
     def _format_lrc_line(start_ms: int, words: str) -> str:
@@ -52,7 +54,7 @@ class SpotifyFetcher(BaseFetcher):
 
         logger.info(f"Spotify: fetching lyrics for trackid={track.trackid}")
 
-        token = await self.auth.authenticate()
+        token = await self._auth.authenticate()
         if not token:
             logger.error("Spotify: cannot fetch lyrics without a token")
             return FetchResult.from_network_error()
@@ -65,7 +67,7 @@ class SpotifyFetcher(BaseFetcher):
         }
 
         try:
-            async with httpx.AsyncClient(timeout=HTTP_TIMEOUT) as client:
+            async with httpx.AsyncClient(timeout=self._general.http_timeout) as client:
                 res = await client.get(url, headers=headers)
 
                 if res.status_code == 404:

src/lrx_cli/mpris.py

@@ -8,14 +8,17 @@ import asyncio
 from dbus_next.aio.message_bus import MessageBus
 from dbus_next.constants import BusType
 from dbus_next.message import Message
+from lrx_cli.config import DEFAULT_PLAYER_BLACKLIST, DEFAULT_PREFERRED_PLAYER
 from lrx_cli.models import TrackMeta
-from lrx_cli.config import PREFERRED_PLAYER
 from loguru import logger
 from typing import Optional, List, Any
 
 
-async def _list_mpris_players(bus: MessageBus) -> List[str]:
-    """List all MPRIS player bus names."""
+async def _list_mpris_players(
+    bus: MessageBus,
+    player_blacklist: tuple[str, ...],
+) -> List[str]:
+    """List all MPRIS player bus names, excluding blacklisted entries."""
     try:
         reply = await bus.call(
             Message(
@@ -28,7 +31,10 @@ async def _list_mpris_players(bus: MessageBus) -> List[str]:
         if not reply or not reply.body:
             return []
         return [
-            name for name in reply.body[0] if name.startswith("org.mpris.MediaPlayer2.")
+            name
+            for name in reply.body[0]
+            if name.startswith("org.mpris.MediaPlayer2.")
+            and not any(x.lower() in name.lower() for x in player_blacklist)
         ]
     except Exception as e:
         logger.error(f"Failed to list DBus names: {e}")
@@ -53,15 +59,18 @@ async def _get_playback_status(bus: MessageBus, player_name: str) -> Optional[st
 
 
 async def _select_player(
-    bus: MessageBus, specific_player: Optional[str] = None
+    bus: MessageBus,
+    specific_player: Optional[str],
+    preferred_player: str,
+    player_blacklist: tuple[str, ...],
 ) -> Optional[str]:
     """Select the best MPRIS player.
 
     When specific_player is given, filter by name match.
     Otherwise: prefer the currently playing player. If multiple are playing,
-    prefer the one matching PREFERRED_PLAYER env var (default: spotify).
+    prefer the one matching preferred_player (default: spotify).
     """
-    players = await _list_mpris_players(bus)
+    players = await _list_mpris_players(bus, player_blacklist)
     if not players:
         return None
 
@@ -82,8 +91,8 @@ async def _select_player(
     if len(candidates) == 1:
         return candidates[0]
 
-    # Multiple candidates: prefer PREFERRED_PLAYER
-    preferred = PREFERRED_PLAYER.lower()
+    # Multiple candidates: prefer preferred_player
+    preferred = preferred_player.lower()
     if preferred:
         for p in candidates:
             if preferred in p.lower():
@@ -92,7 +101,9 @@ async def _select_player(
 
 
 async def _fetch_metadata_dbus(
-    specific_player: Optional[str] = None,
+    specific_player: Optional[str],
+    preferred_player: str,
+    player_blacklist: tuple[str, ...],
 ) -> Optional[TrackMeta]:
     bus = None
     try:
@@ -102,7 +113,9 @@ async def _fetch_metadata_dbus(
         return None
 
     try:
-        player_name = await _select_player(bus, specific_player)
+        player_name = await _select_player(
+            bus, specific_player, preferred_player, player_blacklist
+        )
         if not player_name:
             logger.debug(
                 f"No active MPRIS players found via DBus{' for ' + specific_player if specific_player else ''}."
@@ -182,9 +195,15 @@ async def _fetch_metadata_dbus(
             bus.disconnect()
 
 
-def get_current_track(player_name: Optional[str] = None) -> Optional[TrackMeta]:
+def get_current_track(
+    player_name: Optional[str] = None,
+    preferred_player: str = DEFAULT_PREFERRED_PLAYER,
+    player_blacklist: tuple[str, ...] = DEFAULT_PLAYER_BLACKLIST,
+) -> Optional[TrackMeta]:
     try:
-        return asyncio.run(_fetch_metadata_dbus(player_name))
+        return asyncio.run(
+            _fetch_metadata_dbus(player_name, preferred_player, player_blacklist)
+        )
     except Exception as e:
         logger.error(f"DBus async loop failed: {e}")
         return None

src/lrx_cli/watch/__init__.py

@@ -0,0 +1,5 @@
+"""Watch subsystem public exports."""
+
+from .session import WatchCoordinator
+
+__all__ = ["WatchCoordinator"]

src/lrx_cli/watch/control.py

@@ -0,0 +1,152 @@
+"""Unix-socket control channel for communicating with a running watch session."""
+
+import asyncio
+import json
+from pathlib import Path
+from typing import TYPE_CHECKING
+
+from loguru import logger
+
+from ..config import AppConfig
+
+if TYPE_CHECKING:
+    from .session import WatchCoordinator
+
+
+class ControlServer:
+    """Control server that handles offset/status commands over a Unix socket."""
+
+    _socket_path: Path
+    _server: asyncio.AbstractServer | None
+
+    def __init__(
+        self,
+        config: AppConfig,
+        socket_path: Path | None = None,
+    ) -> None:
+        """Initialize control server with socket path from config or explicit override."""
+        self._socket_path: Path = socket_path or Path(config.watch.socket_path)
+        self._server: asyncio.AbstractServer | None = None
+
+    async def start(self, session: "WatchCoordinator") -> bool:
+        """Start listening for control requests and bind session handlers."""
+        if not await self._prepare_socket_path():
+            return False
+
+        self._socket_path.parent.mkdir(parents=True, exist_ok=True)
+        self._server = await asyncio.start_unix_server(
+            lambda r, w: self._handle(session, r, w),
+            path=str(self._socket_path),
+        )
+        return True
+
+    async def _prepare_socket_path(self) -> bool:
+        """Ensure socket path is usable and reject when another session is active."""
+        if not self._socket_path.exists():
+            return True
+
+        try:
+            reader, writer = await asyncio.open_unix_connection(str(self._socket_path))
+            writer.close()
+            await writer.wait_closed()
+            logger.error(
+                "A watch session is already running. Use 'lrx watch ctl status'."
+            )
+            return False
+        except Exception:
+            try:
+                self._socket_path.unlink(missing_ok=True)
+            except Exception:
+                pass
+            return True
+
+    async def stop(self) -> None:
+        """Stop control server and remove stale socket path."""
+        if self._server is not None:
+            self._server.close()
+            await self._server.wait_closed()
+            self._server = None
+        try:
+            self._socket_path.unlink(missing_ok=True)
+        except Exception:
+            pass
+
+    async def _handle(
+        self,
+        session: "WatchCoordinator",
+        reader: asyncio.StreamReader,
+        writer: asyncio.StreamWriter,
+    ) -> None:
+        """Handle one control request and send JSON response."""
+        resp: dict[str, object] = {"ok": False, "error": "internal error"}
+        try:
+            line = await reader.readline()
+            if not line:
+                resp = {"ok": False, "error": "empty request"}
+            else:
+                req = json.loads(line.decode("utf-8"))
+                cmd = req.get("cmd")
+                if cmd == "offset":
+                    delta = int(req.get("delta", 0))
+                    resp = session.handle_offset(delta)
+                elif cmd == "status":
+                    resp = session.handle_status()
+                else:
+                    resp = {"ok": False, "error": "unknown command"}
+        except Exception as e:
+            resp = {"ok": False, "error": str(e)}
+        finally:
+            writer.write((json.dumps(resp) + "\n").encode("utf-8"))
+            await writer.drain()
+            writer.close()
+            await writer.wait_closed()
+
+
+class ControlClient:
+    """Control client used by CLI commands to talk to active watch session."""
+
+    _socket_path: Path
+
+    def __init__(
+        self,
+        config: AppConfig,
+        socket_path: Path | None = None,
+    ) -> None:
+        """Initialize control client with socket path from config or explicit override."""
+        self._socket_path: Path = socket_path or Path(config.watch.socket_path)
+
+    async def _send_async(self, cmd: dict[str, object]) -> dict[str, object]:
+        """Send one JSON command to control server and return JSON response."""
+        if not self._socket_path.exists():
+            return {"ok": False, "error": "No watch session running."}
+
+        try:
+            reader, writer = await asyncio.open_unix_connection(str(self._socket_path))
+        except Exception:
+            return {"ok": False, "error": "No watch session running."}
+
+        writer.write((json.dumps(cmd) + "\n").encode("utf-8"))
+        await writer.drain()
+        line = await reader.readline()
+        writer.close()
+        await writer.wait_closed()
+        if not line:
+            return {"ok": False, "error": "Empty response."}
+        return json.loads(line.decode("utf-8"))
+
+    def send(self, cmd: dict[str, object]) -> dict[str, object]:
+        """Synchronous wrapper around async control request."""
+        return asyncio.run(self._send_async(cmd))
+
+
+def parse_delta(raw: str) -> tuple[bool, int | None, str | None]:
+    """Parse signed millisecond offset delta string for ctl offset command."""
+    value = raw.strip()
+    try:
+        if value.startswith("+"):
+            return True, int(value[1:]), None
+        if value.startswith("-"):
+            return True, -int(value[1:]), None
+        return True, int(value), None
+    except ValueError:
+        return False, None, f"Invalid offset delta: {raw}"

src/lrx_cli/watch/fetcher.py

@@ -0,0 +1,80 @@
+"""Debounced lyric fetch orchestration for watch session."""
+
+import asyncio
+from typing import Awaitable, Callable, Optional
+
+from ..config import AppConfig
+from ..lrc import LRCData
+from ..models import TrackMeta
+
+
+class LyricFetcher:
+    """Debounces track updates and runs at most one lyric fetch task at a time."""
+
+    _config: AppConfig
+    _fetch_func: Callable[[TrackMeta], Awaitable[Optional[LRCData]]]
+    _on_fetching: Callable[[], Awaitable[None] | None]
+    _on_result: Callable[[Optional[LRCData]], Awaitable[None] | None]
+    _debounce_task: asyncio.Task | None
+    _fetch_task: asyncio.Task | None
+    _pending_track: TrackMeta | None
+
+    def __init__(
+        self,
+        fetch_func: Callable[[TrackMeta], Awaitable[Optional[LRCData]]],
+        on_fetching: Callable[[], Awaitable[None] | None],
+        on_result: Callable[[Optional[LRCData]], Awaitable[None] | None],
+        config: AppConfig,
+    ) -> None:
+        """Initialize fetch callbacks and runtime options."""
+        self._config = config
+        self._fetch_func = fetch_func
+        self._on_fetching = on_fetching
+        self._on_result = on_result
+        self._debounce_task: asyncio.Task | None = None
+        self._fetch_task: asyncio.Task | None = None
+        self._pending_track: TrackMeta | None = None
+
+    async def stop(self) -> None:
+        """Cancel and await all in-flight debounce/fetch tasks."""
+        for task in (self._debounce_task, self._fetch_task):
+            if task is not None:
+                task.cancel()
+        await asyncio.gather(
+            *[t for t in (self._debounce_task, self._fetch_task) if t is not None],
+            return_exceptions=True,
+        )
+        self._debounce_task = None
+        self._fetch_task = None
+
+    def request(self, track: TrackMeta) -> None:
+        """Request lyrics for track with debounce collapsing."""
+        self._pending_track = track
+        if self._debounce_task is not None:
+            self._debounce_task.cancel()
+        self._debounce_task = asyncio.create_task(self._debounce_then_fetch())
+
+    async def _debounce_then_fetch(self) -> None:
+        """Wait debounce window then start a fresh fetch task for latest pending track."""
+        await asyncio.sleep(self._config.watch.debounce_ms / 1000.0)
+        track = self._pending_track
+        if track is None:
+            return
+
+        if self._fetch_task is not None:
+            self._fetch_task.cancel()
+            await asyncio.gather(self._fetch_task, return_exceptions=True)
+
+        self._fetch_task = asyncio.create_task(self._do_fetch(track))
+
+    async def _do_fetch(self, track: TrackMeta) -> None:
+        """Execute fetch lifecycle callbacks and fetch lyrics for a track."""
+        fetching_callback_result = self._on_fetching()
+        if asyncio.iscoroutine(fetching_callback_result):
+            await fetching_callback_result
+
+        lyrics = await self._fetch_func(track)
+
+        result_callback_result = self._on_result(lyrics)
+        if asyncio.iscoroutine(result_callback_result):
+            await result_callback_result

src/lrx_cli/watch/player.py

@@ -0,0 +1,412 @@
+"""Player discovery, state monitoring, and active-player selection for watch mode."""
+
+from dataclasses import dataclass
+from typing import Callable, Optional
+import asyncio
+
+from dbus_next.aio.message_bus import MessageBus
+from dbus_next.constants import BusType
+from dbus_next.message import Message
+from loguru import logger
+
+from ..config import AppConfig
+from ..models import TrackMeta
+
+
+def _variant_value(item: object) -> object | None:
+    """Extract .value from DBus variant-like objects when available."""
+    if hasattr(item, "value"):
+        return getattr(item, "value")
+    return None
+
+
+@dataclass(slots=True)
+class PlayerState:
+    """Current observable state for one MPRIS player."""
+
+    bus_name: str
+    status: str
+    track: Optional[TrackMeta]
+
+
+@dataclass(frozen=True, slots=True)
+class PlayerTarget:
+    """Constraint for choosing which players are visible to watch."""
+
+    hint: Optional[str] = None
+    player_blacklist: tuple[str, ...] = ()
+
+    def validation_error(self) -> str | None:
+        """Return validation message when hint conflicts with blacklist, else None."""
+        normalized_hint = self.normalized_hint
+        if not normalized_hint:
+            return None
+        for blocked in self.player_blacklist:
+            normalized_blocked = blocked.strip().lower()
+            if not normalized_blocked:
+                continue
+            if _keyword_match(normalized_hint, normalized_blocked) or _keyword_match(
+                normalized_blocked, normalized_hint
+            ):
+                return (
+                    f"Requested player '{self.hint}' is blocked by "
+                    f"PLAYER_BLACKLIST entry '{blocked}'."
+                )
+        return None
+
+    @property
+    def normalized_hint(self) -> str:
+        """Return normalized lowercase player hint string."""
+        return (self.hint or "").strip().lower()
+
+    def allows(self, bus_name: str) -> bool:
+        """Return whether given MPRIS bus name passes this target constraint."""
+        normalized_hint = self.normalized_hint
+        if not normalized_hint:
+            return True
+        return _keyword_match(bus_name, normalized_hint)
+
+
+def _keyword_match(text: str, keyword: str) -> bool:
+    """Return True when keyword exists in text, case-insensitively."""
+    return keyword.strip().lower() in text.lower()
+
+
+class PlayerMonitor:
+    """Tracks MPRIS players and forwards signal-driven state updates to session callbacks."""
+
+    _config: AppConfig
+    _on_players_changed: Callable[[], None]
+    _on_seeked: Callable[[str, int], None]
+    _on_playback_status: Callable[[str, str], None]
+    _target: PlayerTarget
+    players: dict[str, PlayerState]
+    _bus: MessageBus | None
+    _props_cache: dict[str, object]
+
+    def __init__(
+        self,
+        on_players_changed: Callable[[], None],
+        on_seeked: Callable[[str, int], None],
+        on_playback_status: Callable[[str, str], None],
+        config: AppConfig,
+        target: Optional[PlayerTarget] = None,
+    ) -> None:
+        """Initialize monitor callbacks, runtime options, and player target filter."""
+        self._config = config
+        self._on_players_changed = on_players_changed
+        self._on_seeked = on_seeked
+        self._on_playback_status = on_playback_status
+        self._target = target or PlayerTarget(
+            player_blacklist=self._config.general.player_blacklist
+        )
+        self.players: dict[str, PlayerState] = {}
+        self._bus: MessageBus | None = None
+        self._props_cache: dict[str, object] = {}
+
+    async def start(self) -> None:
+        """Start DBus monitoring and populate initial player snapshot."""
+        self._bus = await MessageBus(bus_type=BusType.SESSION).connect()
+        self._bus.add_message_handler(self._on_message)
+        await self._add_match_rules()
+        await self.refresh()
+
+    async def close(self) -> None:
+        """Stop DBus monitoring and close bus connection."""
+        self._props_cache.clear()
+        if self._bus:
+            self._bus.disconnect()
+            self._bus = None
+
+    async def _get_player_props(self, bus_name: str) -> object | None:
+        """Return cached DBus Properties interface for player, creating it if missing."""
+        if not self._bus:
+            return None
+        if bus_name in self._props_cache:
+            return self._props_cache[bus_name]
+
+        try:
+            introspection = await self._bus.introspect(
+                bus_name, "/org/mpris/MediaPlayer2"
+            )
+            proxy = self._bus.get_proxy_object(
+                bus_name, "/org/mpris/MediaPlayer2", introspection
+            )
+            props = proxy.get_interface("org.freedesktop.DBus.Properties")
+            self._props_cache[bus_name] = props
+            return props
+        except Exception as e:
+            logger.debug(f"Failed to prepare DBus props for {bus_name}: {e}")
+            self._props_cache.pop(bus_name, None)
+            return None
+
+    async def _add_match_rules(self) -> None:
+        """Register signal subscriptions needed by monitor."""
+        if not self._bus:
+            return
+        rules = [
+            "type='signal',interface='org.freedesktop.DBus',member='NameOwnerChanged'",
+            "type='signal',interface='org.freedesktop.DBus.Properties',member='PropertiesChanged'",
+            "type='signal',interface='org.mpris.MediaPlayer2.Player',member='Seeked'",
+        ]
+        for rule in rules:
+            try:
+                await self._bus.call(
+                    Message(
+                        destination="org.freedesktop.DBus",
+                        path="/org/freedesktop/DBus",
+                        interface="org.freedesktop.DBus",
+                        member="AddMatch",
+                        signature="s",
+                        body=[rule],
+                    )
+                )
+            except Exception as e:
+                logger.debug(f"Failed to add DBus match rule {rule}: {e}")
+
+    async def _list_mpris_players(self) -> list[str]:
+        """List visible MPRIS players after applying blacklist and target filter."""
+        if not self._bus:
+            return []
+        try:
+            reply = await self._bus.call(
+                Message(
+                    destination="org.freedesktop.DBus",
+                    path="/org/freedesktop/DBus",
+                    interface="org.freedesktop.DBus",
+                    member="ListNames",
+                )
+            )
+            if not reply or not reply.body:
+                return []
+            out: list[str] = []
+            for name in reply.body[0]:
+                if not name.startswith("org.mpris.MediaPlayer2."):
+                    continue
+                if any(
+                    x.lower() in name.lower()
+                    for x in self._config.general.player_blacklist
+                ):
+                    continue
+                if not self._target.allows(name):
+                    continue
+                out.append(name)
+            return out
+        except Exception as e:
+            logger.debug(f"Failed to list mpris players: {e}")
+            return []
+
+    async def _fetch_player_state(self, bus_name: str) -> Optional[PlayerState]:
+        """Read current playback status and metadata from one player service."""
+        props = await self._get_player_props(bus_name)
+        if props is None:
+            return None
+        try:
+            status_var = await getattr(props, "call_get")(
+                "org.mpris.MediaPlayer2.Player", "PlaybackStatus"
+            )
+            metadata_var = await getattr(props, "call_get")(
+                "org.mpris.MediaPlayer2.Player", "Metadata"
+            )
+            status = status_var.value if status_var else "Stopped"
+            track = self._track_from_metadata(
+                metadata_var.value if metadata_var else {}
+            )
+            return PlayerState(bus_name=bus_name, status=status, track=track)
+        except Exception as e:
+            logger.debug(f"Failed to read state for {bus_name}: {e}")
+            self._props_cache.pop(bus_name, None)
+            return None
+
+    def _track_from_metadata(self, metadata: dict[str, object]) -> Optional[TrackMeta]:
+        """Build TrackMeta object from MPRIS metadata map."""
+        if not metadata:
+            return None
+        trackid = metadata.get("mpris:trackid")
+        if trackid is not None:
+            trackid = _variant_value(trackid)
+            if isinstance(trackid, str) and trackid.startswith("spotify:track:"):
+                trackid = trackid.removeprefix("spotify:track:")
+            elif isinstance(trackid, str) and trackid.startswith("/com/spotify/track/"):
+                trackid = trackid.removeprefix("/com/spotify/track/")
+            elif not isinstance(trackid, str):
+                trackid = None
+
+        length = metadata.get("mpris:length")
+        length_ms = None
+        length_value = _variant_value(length) if length is not None else None
+        if isinstance(length_value, int):
+            length_ms = length_value // 1000
+
+        artist = metadata.get("xesam:artist")
+        artist_v = None
+        artist_value = _variant_value(artist) if artist is not None else None
+        if isinstance(artist_value, list) and artist_value:
+            artist_v = artist_value[0]
+
+        title = metadata.get("xesam:title")
+        album = metadata.get("xesam:album")
+        url = metadata.get("xesam:url")
+
+        title_value = _variant_value(title) if title is not None else None
+        album_value = _variant_value(album) if album is not None else None
+        url_value = _variant_value(url) if url is not None else None
+
+        return TrackMeta(
+            trackid=trackid,
+            length=length_ms,
+            album=album_value if isinstance(album_value, str) else None,
+            artist=artist_v,
+            title=title_value if isinstance(title_value, str) else None,
+            url=url_value if isinstance(url_value, str) else None,
+        )
+
+    async def refresh(self) -> None:
+        """Refresh full player snapshot and notify session when visible set changes."""
+        players = await self._list_mpris_players()
+        updated: dict[str, PlayerState] = {}
+        for bus_name in players:
+            st = await self._fetch_player_state(bus_name)
+            if st is not None:
+                updated[bus_name] = st
+
+        before = set(self.players.keys())
+        after = set(updated.keys())
+        added = sorted(after - before)
+        removed = sorted(before - after)
+
+        for bus_name in removed:
+            self._props_cache.pop(bus_name, None)
+
+        self.players = updated
+
+        if added or removed:
+            logger.info(
+                "MPRIS players updated: added={}, removed={}",
+                added,
+                removed,
+            )
+
+        self._on_players_changed()
+
+    async def _resolve_well_known_name(self, unique_sender: str) -> str | None:
+        """Map a DBus unique sender (e.g. :1.42) to a tracked MPRIS bus name."""
+        if unique_sender in self.players:
+            return unique_sender
+        if not self._bus:
+            return None
+
+        for bus_name in self.players:
+            try:
+                reply = await self._bus.call(
+                    Message(
+                        destination="org.freedesktop.DBus",
+                        path="/org/freedesktop/DBus",
+                        interface="org.freedesktop.DBus",
+                        member="GetNameOwner",
+                        signature="s",
+                        body=[bus_name],
+                    )
+                )
+                if reply and reply.body and str(reply.body[0]) == unique_sender:
+                    return bus_name
+            except Exception:
+                continue
+        return None
+
+    async def _handle_seeked_signal(self, sender: str, position_ms: int) -> None:
+        """Route Seeked signal to session using well-known bus name when possible."""
+        bus_name = await self._resolve_well_known_name(sender)
+        if bus_name is not None:
+            self._on_seeked(bus_name, position_ms)
+            return
+
+        # If we cannot map sender reliably, force a state refresh to converge.
+        await self.refresh()
+
+    def _on_message(self, message: Message) -> bool:
+        """Low-level DBus signal handler for player lifecycle/status/seek events."""
+        try:
+            if (
+                message.interface == "org.freedesktop.DBus"
+                and message.member == "NameOwnerChanged"
+            ):
+                if message.body and str(message.body[0]).startswith(
+                    "org.mpris.MediaPlayer2."
+                ):
+                    asyncio.create_task(self.refresh())
+                return False
+
+            if (
+                message.interface == "org.freedesktop.DBus.Properties"
+                and message.member == "PropertiesChanged"
+            ):
+                # Message.sender is a DBus unique name, so match by path+iface.
+                path_ok = message.path == "/org/mpris/MediaPlayer2"
+                iface = message.body[0] if message.body else None
+                if path_ok and iface == "org.mpris.MediaPlayer2.Player":
+                    asyncio.create_task(self.refresh())
+                return False
+
+            if (
+                message.interface == "org.mpris.MediaPlayer2.Player"
+                and message.member == "Seeked"
+            ):
+                sender = message.sender or ""
+                if sender and message.body:
+                    position_us = int(message.body[0])
+                    asyncio.create_task(
+                        self._handle_seeked_signal(
+                            sender,
+                            max(0, position_us // 1000),
+                        )
+                    )
+                return False
+        except Exception as e:
+            logger.debug(f"PlayerMonitor signal handling error: {e}")
+        return False
+
+    async def get_position_ms(self, bus_name: str) -> Optional[int]:
+        """Read player-reported position in milliseconds."""
+        props = await self._get_player_props(bus_name)
+        if props is None:
+            return None
+        try:
+            position_var = await getattr(props, "call_get")(
+                "org.mpris.MediaPlayer2.Player", "Position"
+            )
+            if position_var is None:
+                return None
+            return max(0, int(position_var.value) // 1000)
+        except Exception as e:
+            logger.debug(f"Failed to read position from {bus_name}: {e}")
+            self._props_cache.pop(bus_name, None)
+            return None
+
+
+class ActivePlayerSelector:
+    @staticmethod
+    def select(
+        players: dict[str, PlayerState],
+        last_active: str | None,
+        config: AppConfig,
+    ) -> str | None:
+        """Select active player by playing state, preferred keyword, and continuity."""
+        if not players:
+            return None
+
+        playing = [name for name, st in players.items() if st.status == "Playing"]
+        if len(playing) == 1:
+            return playing[0]
+
+        preferred = config.general.preferred_player.lower().strip()
+        candidates = playing if playing else list(players.keys())
+        if preferred:
+            for name in candidates:
+                if preferred in name.lower():
+                    return name
+
+        if last_active and last_active in players:
+            return last_active
+
+        return candidates[0] if candidates else None

src/lrx_cli/watch/session.py

@@ -0,0 +1,389 @@
+"""Watch orchestration with explicit MVVM role boundaries.
+
+- Model: WatchModel stores domain state.
+- ViewModel: WatchViewModel projects model to output-facing state/signature.
+- Coordinator: WatchCoordinator wires services and drives async workflows.
+"""
+
+import asyncio
+from dataclasses import asdict
+from typing import Optional
+
+from loguru import logger
+
+from ..core import LrcManager
+from ..lrc import LRCData
+from ..models import TrackMeta
+from .control import ControlServer
+from .fetcher import LyricFetcher
+from ..config import AppConfig
+from .view import BaseOutput, LyricView, WatchState
+from .player import ActivePlayerSelector, PlayerMonitor, PlayerTarget
+from .tracker import PositionTracker
+
+
+class WatchModel:
+    """Model layer that owns watch state and lyric timeline representation."""
+
+    offset_ms: int
+    active_player: str | None
+    active_track_key: str | None
+    status: str
+    lyrics: LyricView | None
+
+    def __init__(self) -> None:
+        self.offset_ms = 0
+        self.active_player: str | None = None
+        self.active_track_key: str | None = None
+        self.status: str = "idle"
+        self.lyrics: LyricView | None = None
+
+    def set_lyrics(self, lyrics: LRCData | None) -> None:
+        """Update lyrics and rebuild projection once per lyric object change."""
+        if lyrics is None:
+            self.lyrics = None
+            return
+
+        self.lyrics = LyricView.from_lrc(lyrics)
+
+    def state_signature(self, track: TrackMeta | None, position_ms: int) -> tuple:
+        """Build dedupe signature from model state and current lyric cursor."""
+        track_key = (
+            track.trackid
+            if track and track.trackid
+            else track.display_name()
+            if track
+            else None
+        )
+
+        if self.status != "ok" or self.lyrics is None:
+            return ("status", self.status, self.active_player, track_key)
+        at_ms = position_ms + self.offset_ms
+        cursor = self.lyrics.signature_cursor(at_ms)
+        return ("lyrics", self.active_player, track_key, cursor)
+
+
+class WatchViewModel:
+    """ViewModel that projects WatchModel into view-consumable snapshots."""
+
+    _model: WatchModel
+
+    def __init__(self, model: WatchModel) -> None:
+        self._model = model
+
+    def signature(self, track: TrackMeta | None, position_ms: int) -> tuple:
+        """Build dedupe signature for current projected state."""
+        return self._model.state_signature(track, position_ms)
+
+    def state(self, track: TrackMeta | None, position_ms: int) -> WatchState:
+        """Project model values into immutable WatchState payload."""
+        return WatchState(
+            track=track,
+            lyrics=self._model.lyrics,
+            position_ms=position_ms,
+            offset_ms=self._model.offset_ms,
+            status=self._model.status,  # type: ignore[arg-type]
+        )
+
+
+class WatchCoordinator:
+    """Application/service orchestration layer for watch runtime."""
+
+    _manager: LrcManager
+    _output: BaseOutput
+    _config: AppConfig
+    _model: WatchModel
+    _view_model: WatchViewModel
+    _player_hint: str | None
+    _last_emit_signature: tuple | None
+    _target: PlayerTarget
+    _control: ControlServer
+    _player_monitor: PlayerMonitor
+    _tracker: PositionTracker
+    _fetcher: LyricFetcher
+    _emit_scheduled: bool
+    _calibration_task: asyncio.Task | None
+
+    def __init__(
+        self,
+        manager: LrcManager,
+        output: BaseOutput,
+        player_hint: str | None,
+        config: AppConfig,
+    ) -> None:
+        self._manager = manager
+        self._output = output
+        self._config = config
+        self._model = WatchModel()
+        self._view_model = WatchViewModel(self._model)
+        self._player_hint = player_hint
+        self._last_emit_signature: tuple | None = None
+        self._emit_scheduled = False
+        self._calibration_task = None
+
+        self._target = PlayerTarget(
+            hint=player_hint,
+            player_blacklist=self._config.general.player_blacklist,
+        )
+
+        self._control = ControlServer(config=self._config)
+        self._player_monitor = PlayerMonitor(
+            on_players_changed=self._on_player_change,
+            on_seeked=self._on_seeked,
+            on_playback_status=self._on_playback_status,
+            config=self._config,
+            target=self._target,
+        )
+        self._tracker = PositionTracker(
+            poll_position_ms=self._player_monitor.get_position_ms,
+            config=self._config,
+            on_tick=self._on_tracker_tick,
+        )
+        self._fetcher = LyricFetcher(
+            fetch_func=self._fetch_lyrics,
+            on_fetching=self._on_fetching,
+            on_result=self._on_lyrics_update,
+            config=self._config,
+        )
+
+    async def run(self) -> bool:
+        """Run watch workflow and return success flag."""
+        target_issue = self._target.validation_error()
+        if target_issue:
+            logger.error(target_issue)
+            return False
+
+        logger.info(
+            "watch session starting (player filter: {})",
+            self._player_hint or "<none>",
+        )
+
+        if not await self._control.start(self):
+            return False
+        try:
+            await self._player_monitor.start()
+            await self._tracker.start()
+            self._calibration_task = asyncio.create_task(self._calibration_loop())
+            self._schedule_emit()
+            await asyncio.Event().wait()
+            return True
+        except asyncio.CancelledError:
+            return True
+        except Exception as exc:
+            logger.exception("watch runtime error: {}", exc)
+            return False
+        finally:
+            logger.info("watch session stopping")
+            if self._calibration_task is not None:
+                self._calibration_task.cancel()
+                await asyncio.gather(self._calibration_task, return_exceptions=True)
+                self._calibration_task = None
+            await self._fetcher.stop()
+            await self._tracker.stop()
+            await self._player_monitor.close()
+            await self._control.stop()
+
+    async def _calibration_loop(self) -> None:
+        """Periodically refresh full MPRIS snapshot as fallback calibration."""
+        interval = max(0.1, self._config.watch.calibration_interval_s)
+        while True:
+            await asyncio.sleep(interval)
+            try:
+                await self._player_monitor.refresh()
+            except asyncio.CancelledError:
+                raise
+            except Exception as exc:
+                logger.debug("mpris calibration refresh failed: {}", exc)
+
+    def _active_track(self) -> TrackMeta | None:
+        """Return active track metadata from selected player."""
+        player = self._player_monitor.players.get(self._model.active_player or "")
+        return player.track if player else None
+
+    def _request_fetch_for_active_track(self, reason: str) -> bool:
+        """Trigger lyric fetch for active track when needed."""
+        track = self._active_track()
+        if track is None:
+            return False
+        if self._model.lyrics is not None:
+            return False
+        if self._model.status == "fetching":
+            return False
+        logger.info("fetching lyrics for track ({}): {}", reason, track.display_name())
+        self._fetcher.request(track)
+        return True
+
+    async def _fetch_lyrics(self, track: TrackMeta) -> Optional[LRCData]:
+        """Fetch lyrics in worker thread."""
+        result = await asyncio.to_thread(
+            self._manager.fetch_for_track,
+            track,
+            None,
+            False,
+            False,
+        )
+        if result and result.lyrics:
+            return result.lyrics
+        return None
+
+    def _on_player_change(self) -> None:
+        """React to monitor player snapshot change."""
+        prev_player = self._model.active_player
+        prev_track_key = self._model.active_track_key
+
+        selected = ActivePlayerSelector.select(
+            self._player_monitor.players,
+            self._model.active_player,
+            self._config,
+        )
+        self._model.active_player = selected
+
+        if selected != prev_player:
+            logger.info(
+                "active player changed: {} -> {}",
+                prev_player or "<none>",
+                selected or "<none>",
+            )
+
+        if selected is None:
+            self._model.status = "idle"
+            self._model.active_track_key = None
+            self._model.set_lyrics(None)
+            self._schedule_emit()
+            return
+
+        state = self._player_monitor.players.get(selected)
+        if state is None:
+            self._model.status = "idle"
+            self._model.active_track_key = None
+            self._model.set_lyrics(None)
+            self._schedule_emit()
+            return
+
+        track = state.track
+        track_key = (
+            track.trackid
+            if track and track.trackid
+            else track.display_name()
+            if track
+            else None
+        )
+
+        track_changed = track_key != prev_track_key
+        player_changed = selected != prev_player
+        if track_changed or player_changed:
+            self._model.set_lyrics(None)
+
+        self._model.active_track_key = track_key
+
+        asyncio.create_task(
+            self._tracker.set_active_player(
+                selected,
+                state.status,
+                track_key,
+            )
+        )
+
+        if state.status != "Playing":
+            self._model.status = "paused"
+            self._schedule_emit()
+            return
+
+        started_fetch = False
+        if track is not None and (
+            player_changed or track_changed or self._model.lyrics is None
+        ):
+            started_fetch = self._request_fetch_for_active_track("track-changed")
+
+        if self._model.lyrics is not None:
+            self._model.status = "ok"
+        elif started_fetch:
+            self._model.status = "fetching"
+        elif self._model.status != "fetching":
+            self._model.status = "no_lyrics"
+        self._schedule_emit()
+
+    def _on_seeked(self, bus_name: str, position_ms: int) -> None:
+        """Forward seek event to tracker."""
+        asyncio.create_task(self._tracker.on_seeked(bus_name, position_ms))
+
+    def _on_playback_status(self, bus_name: str, status: str) -> None:
+        """React to playback status change and tracker sync."""
+        if bus_name == self._model.active_player:
+            if status == "Playing":
+                started_fetch = self._request_fetch_for_active_track("resume-playing")
+                if self._model.lyrics is not None:
+                    self._model.status = "ok"
+                elif started_fetch:
+                    self._model.status = "fetching"
+                elif self._model.status != "fetching":
+                    self._model.status = "no_lyrics"
+            else:
+                self._model.status = "paused"
+            self._schedule_emit()
+        asyncio.create_task(self._tracker.on_playback_status(bus_name, status))
+
+    def _on_tracker_tick(self) -> None:
+        """Emit updates from tracker tick only while lyrics are actively rendering."""
+        if self._model.status == "ok":
+            self._schedule_emit()
+
+    def _schedule_emit(self) -> None:
+        """Coalesce frequent events into at most one in-flight emit task."""
+        if self._emit_scheduled:
+            return
+        self._emit_scheduled = True
+        asyncio.create_task(self._run_scheduled_emit())
+
+    async def _run_scheduled_emit(self) -> None:
+        """Run one coalesced emit and release scheduler gate."""
+        try:
+            await self._emit_state()
+        finally:
+            self._emit_scheduled = False
+
+    async def _on_fetching(self) -> None:
+        """Mark model as fetching and emit state."""
+        self._model.status = "fetching"
+        await self._emit_state()
+
+    async def _on_lyrics_update(self, lyrics: Optional[LRCData]) -> None:
+        """Update model with fetched lyrics and emit state."""
+        self._model.set_lyrics(lyrics)
+        self._model.status = "ok" if lyrics is not None else "no_lyrics"
+        logger.info(
+            "lyrics update result: {}",
+            "found" if lyrics is not None else "not found",
+        )
+        await self._emit_state()
+
+    async def _emit_state(self) -> None:
+        """Emit output state only when semantic signature changes."""
+        player = self._player_monitor.players.get(self._model.active_player or "")
+        track = player.track if player else None
+        position = await self._tracker.get_position_ms()
+
+        signature = self._view_model.signature(track, position)
+        if signature == self._last_emit_signature:
+            return
+        self._last_emit_signature = signature
+        state = self._view_model.state(track, position)
+        await self._output.on_state(state)
+
+    def handle_offset(self, delta: int) -> dict:
+        """Apply offset update requested by control channel."""
+        self._model.offset_ms += delta
+        return {"ok": True, "offset_ms": self._model.offset_ms}
+
+    def handle_status(self) -> dict:
+        """Return status payload for control channel."""
+        player = self._player_monitor.players.get(self._model.active_player or "")
+        track = asdict(player.track) if player and player.track else None
+        return {
+            "ok": True,
+            "offset_ms": self._model.offset_ms,
+            "player": self._model.active_player,
+            "track": track,
+            "position_ms": self._tracker.peek_position_ms(),
+            "lyrics_status": self._model.status,
+        }

src/lrx_cli/watch/tracker.py

@@ -0,0 +1,143 @@
+"""Playback position tracking utilities for watch mode."""
+
+import asyncio
+import time
+from typing import Awaitable, Callable, Optional
+
+from ..config import AppConfig
+
+
+class PositionTracker:
+    """Maintains an estimated playback position from seek/status events plus local clock."""
+
+    _config: AppConfig
+    _poll_position_ms: Callable[[str], Awaitable[Optional[int]]]
+    _active_player: str | None
+    _is_playing: bool
+    _track_key: str | None
+    _position_ms: int
+    _last_tick: float
+    _fast_task: asyncio.Task | None
+    _on_tick: Callable[[], None] | None
+    _lock: asyncio.Lock
+
+    def __init__(
+        self,
+        poll_position_ms: Callable[[str], Awaitable[Optional[int]]],
+        config: AppConfig,
+        on_tick: Callable[[], None] | None = None,
+    ) -> None:
+        """Initialize tracker with position polling callback and runtime options."""
+        self._config = config
+        self._poll_position_ms = poll_position_ms
+        self._on_tick = on_tick
+        self._active_player: str | None = None
+        self._is_playing = False
+        self._track_key: str | None = None
+        self._position_ms = 0
+        self._last_tick = time.monotonic()
+        self._fast_task: asyncio.Task | None = None
+        self._lock = asyncio.Lock()
+
+    async def start(self) -> None:
+        """Start local monotonic position ticking task."""
+        self._last_tick = time.monotonic()
+        self._fast_task = asyncio.create_task(self._fast_loop())
+
+    async def stop(self) -> None:
+        """Stop tracker tasks and await clean cancellation."""
+        tasks = [t for t in (self._fast_task,) if t is not None]
+        for task in tasks:
+            task.cancel()
+        if tasks:
+            await asyncio.gather(*tasks, return_exceptions=True)
+        self._fast_task = None
+
+    async def set_active_player(
+        self,
+        bus_name: str | None,
+        playback_status: str,
+        track_key: str | None,
+    ) -> None:
+        """Switch active source and calibrate position once when entering a new playing track."""
+        should_calibrate_now = False
+        async with self._lock:
+            player_changed = self._active_player != bus_name
+            track_changed = self._track_key != track_key
+            was_playing = self._is_playing
+            self._active_player = bus_name
+            self._is_playing = playback_status == "Playing"
+            status_changed_to_playing = self._is_playing and not was_playing
+            if player_changed or track_changed:
+                self._position_ms = 0
+            should_calibrate_now = (
+                self._is_playing
+                and bool(self._active_player)
+                and (player_changed or track_changed or status_changed_to_playing)
+            )
+            self._track_key = track_key
+            self._last_tick = time.monotonic()
+
+        if should_calibrate_now and self._active_player:
+            await self._calibrate_once(self._active_player)
+
+    async def on_seeked(self, bus_name: str, position_ms: int) -> None:
+        """Apply explicit seek position update for active player."""
+        async with self._lock:
+            if bus_name != self._active_player:
+                return
+            self._position_ms = max(0, position_ms)
+            self._last_tick = time.monotonic()
+
+    async def on_playback_status(self, bus_name: str, playback_status: str) -> None:
+        """Update playing state and calibrate once on paused-to-playing transition."""
+        should_calibrate_now = False
+        async with self._lock:
+            if bus_name != self._active_player:
+                return
+            was_playing = self._is_playing
+            self._is_playing = playback_status == "Playing"
+            should_calibrate_now = self._is_playing and not was_playing
+            self._last_tick = time.monotonic()
+
+        if should_calibrate_now:
+            await self._calibrate_once(bus_name)
+
+    async def _fast_loop(self) -> None:
+        """Advance position by monotonic clock while active player is playing."""
+        interval = self._config.watch.position_tick_ms / 1000.0
+        while True:
+            await asyncio.sleep(interval)
+            should_notify = False
+            async with self._lock:
+                now = time.monotonic()
+                if self._is_playing and self._active_player:
+                    delta_ms = int((now - self._last_tick) * 1000)
+                    if delta_ms > 0:
+                        self._position_ms += delta_ms
+                        should_notify = True
+                self._last_tick = now
+
+            if should_notify and self._on_tick is not None:
+                self._on_tick()
+
+    async def _calibrate_once(self, bus_name: str) -> None:
+        """Poll player-reported position once and synchronize local tracker state."""
+        polled = await self._poll_position_ms(bus_name)
+        if polled is None:
+            return
+        async with self._lock:
+            if bus_name != self._active_player:
+                return
+            # Drift correction is signal-assisted; polling is fallback.
+            self._position_ms = max(0, polled)
+            self._last_tick = time.monotonic()
+
+    async def get_position_ms(self) -> int:
+        """Return current tracked position in milliseconds."""
+        async with self._lock:
+            return max(0, int(self._position_ms))
+
+    def peek_position_ms(self) -> int:
+        """Return current tracked position without awaiting lock (best-effort snapshot)."""
+        return max(0, int(self._position_ms))

src/lrx_cli/watch/view/__init__.py

@@ -0,0 +1,80 @@
+"""Output abstraction types for watch mode rendering."""
+
+from abc import ABC, abstractmethod
+from bisect import bisect_right
+from dataclasses import dataclass
+from typing import Literal, Optional
+
+from ...lrc import LRCData, LyricLine
+from ...models import TrackMeta
+
+
+@dataclass(slots=True, frozen=True)
+class LyricView:
+    """View-ready immutable lyric data projected from one normalized LRC object."""
+
+    normalized: LRCData
+    lines: tuple[str, ...]
+    timed_line_entries: tuple[tuple[int, int], ...]
+    timestamps: tuple[int, ...]
+
+    @staticmethod
+    def from_lrc(lyrics: LRCData) -> "LyricView":
+        """Build a view projection once from normalized lyrics."""
+        normalized = lyrics.normalize()
+
+        lines: list[str] = []
+        entries: list[tuple[int, int]] = []
+
+        line_index = 0
+        for line in normalized.lines:
+            if not isinstance(line, LyricLine):
+                continue
+            text = line.text
+            lines.append(text)
+            timestamp = line.line_times_ms[0] if line.line_times_ms else 0
+            entries.append((max(0, timestamp), line_index))
+            line_index += 1
+
+        timestamps = tuple(timestamp for timestamp, _ in entries)
+        return LyricView(
+            normalized=normalized,
+            lines=tuple(lines),
+            timed_line_entries=tuple(entries),
+            timestamps=timestamps,
+        )
+
+    def signature_cursor(self, at_ms: int) -> tuple:
+        """Build a stable cursor signature for dedupe decisions."""
+        if not self.timed_line_entries:
+            return ("plain", self.lines)
+
+        first_ts = self.timed_line_entries[0][0]
+        if at_ms < first_ts:
+            return ("before_first", first_ts)
+
+        idx = bisect_right(self.timestamps, at_ms) - 1
+        if idx < 0:
+            idx = 0
+
+        ts, line_idx = self.timed_line_entries[idx]
+        text = self.lines[line_idx] if line_idx < len(self.lines) else ""
+        return ("ok", idx, ts, text)
+
+
+@dataclass(slots=True)
+class WatchState:
+    """Immutable snapshot payload delivered from session to output implementations."""
+
+    track: Optional[TrackMeta]
+    lyrics: Optional[LyricView]
+    position_ms: int
+    offset_ms: int
+    status: Literal["fetching", "ok", "no_lyrics", "paused", "idle"]
+
+
+class BaseOutput(ABC):
+    @abstractmethod
+    async def on_state(self, state: WatchState) -> None:
+        """Render or deliver one watch state frame."""
+        ...

src/lrx_cli/watch/view/pipe.py

@@ -0,0 +1,85 @@
+"""Pipe output implementation for watch mode."""
+
+from bisect import bisect_right
+from dataclasses import dataclass
+import sys
+
+from . import BaseOutput, WatchState
+
+
+@dataclass(slots=True)
+class PipeOutput(BaseOutput):
+    """Render a fixed lyric context window to stdout for streaming/pipe usage."""
+
+    before: int = 0
+    after: int = 0
+
+    def _window_size(self) -> int:
+        """Return rendered lyric window size."""
+        return self.before + 1 + self.after
+
+    def _render_status(self, message: str) -> list[str]:
+        """Render centered status line in fixed-size window."""
+        lines = [""] * self._window_size()
+        lines[self.before] = message
+        return lines
+
+    def _render_lyrics(self, state: WatchState) -> list[str]:
+        """Render context lines centered on current timed lyric entry."""
+        if state.lyrics is None:
+            return self._render_status("[no lyrics]")
+
+        all_lines = state.lyrics.lines
+        if not all_lines:
+            return self._render_status("[no lyrics]")
+        entries = state.lyrics.timed_line_entries
+
+        effective_ms = state.position_ms + state.offset_ms
+        current_line_idx: int | None
+        if entries and effective_ms < entries[0][0]:
+            # Before first timestamp, current lyric is empty and after-window shows upcoming lines.
+            current_line_idx = None
+        else:
+            if not entries:
+                current_line_idx = 0
+            else:
+                current_entry_idx = (
+                    bisect_right(state.lyrics.timestamps, effective_ms) - 1
+                )
+                if current_entry_idx < 0:
+                    current_entry_idx = 0
+                current_line_idx = entries[current_entry_idx][1]
+
+        out: list[str] = []
+        for rel in range(-self.before, self.after + 1):
+            if current_line_idx is None:
+                if rel <= 0:
+                    out.append("")
+                    continue
+                line_idx = rel - 1
+            else:
+                line_idx = current_line_idx + rel
+
+            if 0 <= line_idx < len(all_lines):
+                out.append(all_lines[line_idx])
+            else:
+                out.append("")
+
+        return out
+
+    async def on_state(self, state: WatchState) -> None:
+        """Render and flush one frame for the latest watch state."""
+        if state.status == "fetching":
+            lines = self._render_status("[fetching...]")
+        elif state.status == "no_lyrics":
+            lines = self._render_status("[no lyrics]")
+        elif state.status == "paused":
+            lines = self._render_status("[paused]")
+        elif state.status == "idle":
+            lines = self._render_status("[idle]")
+        else:
+            lines = self._render_lyrics(state)
+
+        for line in lines:
+            print(line)
+        sys.stdout.flush()

tests/conftest.py

@@ -1,13 +1,3 @@
-import pytest
-
 from lrx_cli.config import enable_debug
 
 enable_debug()
-
-
-@pytest.fixture
-def no_credentials(monkeypatch):
-    """Clear all credential env vars so only anonymous fetchers are active."""
-    monkeypatch.delenv("SPOTIFY_SP_DC", raising=False)
-    monkeypatch.delenv("QQ_MUSIC_API_URL", raising=False)
-    monkeypatch.delenv("MUSIXMATCH_USERTOKEN", raising=False)

tests/marks.py

@@ -1,16 +1,18 @@
-import os
-
 import pytest
 
+from lrx_cli.config import load_config
+
+_credentials = load_config().credentials
+
 requires_spotify = pytest.mark.skipif(
-    not os.environ.get("SPOTIFY_SP_DC"),
-    reason="requires SPOTIFY_SP_DC",
+    not _credentials.spotify_sp_dc,
+    reason="requires credentials.spotify_sp_dc in config.toml",
 )
 requires_qq_music = pytest.mark.skipif(
-    not os.environ.get("QQ_MUSIC_API_URL"),
-    reason="requires QQ_MUSIC_API_URL",
+    not _credentials.qq_music_api_url,
+    reason="requires credentials.qq_music_api_url in config.toml",
 )
 requires_musixmatch_token = pytest.mark.skipif(
-    not os.environ.get("MUSIXMATCH_USERTOKEN"),
-    reason="requires MUSIXMATCH_USERTOKEN",
+    not _credentials.musixmatch_usertoken,
+    reason="requires credentials.musixmatch_usertoken in config.toml",
 )

tests/test_config.py

@@ -0,0 +1,59 @@
+import pytest
+
+from lrx_cli.config import AppConfig, CredentialConfig, WatchConfig, load_config
+
+
+def test_missing_file_returns_defaults(tmp_path):
+    assert load_config(tmp_path / "nonexistent.toml") == AppConfig()
+
+
+def test_empty_file_returns_defaults(tmp_path):
+    p = tmp_path / "config.toml"
+    p.write_text("")
+    assert load_config(p) == AppConfig()
+
+
+def test_partial_section_keeps_other_defaults(tmp_path):
+    p = tmp_path / "config.toml"
+    p.write_bytes(b"[watch]\ndebounce_ms = 200\n")
+    cfg = load_config(p)
+    assert cfg.watch.debounce_ms == 200
+    assert cfg.watch.calibration_interval_s == WatchConfig().calibration_interval_s
+
+
+def test_credentials_roundtrip(tmp_path):
+    p = tmp_path / "config.toml"
+    p.write_bytes(
+        b"[credentials]\n"
+        b'spotify_sp_dc = "abc"\n'
+        b'qq_music_api_url = "http://localhost:3000"\n'
+    )
+    assert load_config(p).credentials == CredentialConfig(
+        spotify_sp_dc="abc", qq_music_api_url="http://localhost:3000"
+    )
+
+
+def test_int_coerced_to_float(tmp_path):
+    p = tmp_path / "config.toml"
+    p.write_bytes(b"[general]\nhttp_timeout = 5\n")
+    assert load_config(p).general.http_timeout == 5.0
+
+
+def test_unknown_key_raises(tmp_path):
+    p = tmp_path / "config.toml"
+    p.write_bytes(b"[general]\ntypo_key = 1\n")
+    with pytest.raises(ValueError, match="Unknown config keys"):
+        load_config(p)
+
+
+def test_wrong_type_raises(tmp_path):
+    p = tmp_path / "config.toml"
+    p.write_bytes(b"[watch]\ndebounce_ms = true\n")
+    with pytest.raises(ValueError, match="expected int"):
+        load_config(p)
+
+
+def test_app_config_is_frozen():
+    cfg = AppConfig()
+    with pytest.raises(Exception):
+        cfg.general = None  # type: ignore[misc]

tests/test_fetchers.py

@@ -1,14 +1,16 @@
-from pathlib import Path
-import pytest
 from dataclasses import replace
+from pathlib import Path
 
+import pytest
+
+from lrx_cli.config import AppConfig, load_config
+from lrx_cli.core import LrcManager
 from lrx_cli.fetchers import FetcherMethodType
 from lrx_cli.models import TrackMeta
-from lrx_cli.core import LrcManager
 from tests.marks import (
-    requires_spotify,
-    requires_qq_music,
     requires_musixmatch_token,
+    requires_qq_music,
+    requires_spotify,
 )
 
 SAMPLE_SPOTIFY_TRACK: TrackMeta = TrackMeta(
@@ -33,7 +35,14 @@ SAMPLE_SPOTIFY_TRACK_ALBUM_ARTIST_MODIFIED = replace(
 
 @pytest.fixture
 def lrc_manager(tmp_path: Path) -> LrcManager:
-    return LrcManager(str(tmp_path / "cache.db"))
+    """LrcManager with empty credentials (no auth required)."""
+    return LrcManager(str(tmp_path / "cache.db"), AppConfig())
+
+
+@pytest.fixture
+def cred_lrc_manager(tmp_path: Path) -> LrcManager:
+    """LrcManager with credentials from config.toml (for CI/network tests)."""
+    return LrcManager(str(tmp_path / "cache.db"), load_config())
 
 
 def _fetch_and_assert(
@@ -112,7 +121,6 @@ def test_cache_search_fetcher_prefer_better_match(lrc_manager: LrcManager):
     ],
 )
 def test_anonymous_remote_fetchers(
-    no_credentials,
     lrc_manager: LrcManager,
     method: FetcherMethodType,
     expect_fail: bool,
@@ -122,18 +130,18 @@ def test_anonymous_remote_fetchers(
 
 @pytest.mark.network
 @requires_spotify
-def test_spotify_fetcher(lrc_manager: LrcManager):
-    _fetch_and_assert(lrc_manager, "spotify")
+def test_spotify_fetcher(cred_lrc_manager: LrcManager):
+    _fetch_and_assert(cred_lrc_manager, "spotify")
 
 
 @pytest.mark.network
 @requires_qq_music
-def test_qqmusic_fetcher(lrc_manager: LrcManager):
-    _fetch_and_assert(lrc_manager, "qqmusic")
+def test_qqmusic_fetcher(cred_lrc_manager: LrcManager):
+    _fetch_and_assert(cred_lrc_manager, "qqmusic")
 
 
 @pytest.mark.network
-def test_musixmatch_anonymous_fetcher(no_credentials, lrc_manager: LrcManager):
+def test_musixmatch_anonymous_fetcher(lrc_manager: LrcManager):
     # These fetchers should be tested in a single test to share the same usertoken
     # Otherwise the second may fail due to rate limits
     _fetch_and_assert(lrc_manager, "musixmatch", expect_fail=False)
@@ -142,9 +150,9 @@ def test_musixmatch_anonymous_fetcher(no_credentials, lrc_manager: LrcManager):
 
 @pytest.mark.network
 @requires_musixmatch_token
-def test_musixmatch_fetcher(lrc_manager: LrcManager):
-    _fetch_and_assert(lrc_manager, "musixmatch")
-    _fetch_and_assert(lrc_manager, "musixmatch-spotify")
+def test_musixmatch_fetcher(cred_lrc_manager: LrcManager):
+    _fetch_and_assert(cred_lrc_manager, "musixmatch")
+    _fetch_and_assert(cred_lrc_manager, "musixmatch-spotify")
 
 
 def test_local_fetcher(lrc_manager: LrcManager):

tests/test_local.py

@@ -0,0 +1,123 @@
+from __future__ import annotations
+
+import asyncio
+from pathlib import Path
+
+from lrx_cli.config import AppConfig
+from lrx_cli.enrichers.audio_tag import AudioTagEnricher
+from lrx_cli.enrichers.file_name import FileNameEnricher
+from lrx_cli.models import CacheStatus, TrackMeta
+from lrx_cli.fetchers.local import LocalFetcher
+
+_GENERAL = AppConfig().general
+
+
+def _local_track(path: Path) -> TrackMeta:
+    return TrackMeta(url=f"file://{path}")
+
+
+def test_local_fetcher_unavailable_for_non_local_track():
+    fetcher = LocalFetcher(_GENERAL)
+    assert not fetcher.is_available(TrackMeta(title="Song", artist="Artist"))
+
+
+def test_local_fetcher_available_for_local_track(tmp_path):
+    fetcher = LocalFetcher(_GENERAL)
+    assert fetcher.is_available(_local_track(tmp_path / "song.flac"))
+
+
+def test_local_fetcher_returns_empty_for_non_file_url():
+    fetcher = LocalFetcher(_GENERAL)
+    track = TrackMeta(url="https://example.com/song.mp3")
+    result = asyncio.run(fetcher.fetch(track))
+    assert result.synced is None and result.unsynced is None
+
+
+def test_local_fetcher_reads_synced_sidecar(tmp_path):
+    audio = tmp_path / "song.flac"
+    lrc = audio.with_suffix(".lrc")
+    lrc.write_text("[00:01.00]Hello\n[00:03.00]World\n")
+
+    fetcher = LocalFetcher(_GENERAL)
+    result = asyncio.run(fetcher.fetch(_local_track(audio)))
+
+    assert result.synced is not None
+    assert result.synced.status == CacheStatus.SUCCESS_SYNCED
+    assert result.synced.source is not None
+    assert "sidecar" in result.synced.source
+
+
+def test_local_fetcher_reads_unsynced_sidecar(tmp_path):
+    audio = tmp_path / "song.flac"
+    lrc = audio.with_suffix(".lrc")
+    lrc.write_text("Hello\nWorld\n")
+
+    fetcher = LocalFetcher(_GENERAL)
+    result = asyncio.run(fetcher.fetch(_local_track(audio)))
+
+    assert result.unsynced is not None
+    assert result.synced is None
+
+
+def test_local_fetcher_empty_sidecar_ignored(tmp_path):
+    audio = tmp_path / "song.flac"
+    (audio.with_suffix(".lrc")).write_text("   ")
+
+    fetcher = LocalFetcher(_GENERAL)
+    result = asyncio.run(fetcher.fetch(_local_track(audio)))
+
+    assert result.synced is None and result.unsynced is None
+
+
+def _enrich(path: str, **existing) -> dict | None:
+    enricher = FileNameEnricher()
+    track = TrackMeta(url=f"file://{path}", **existing)
+    return asyncio.run(enricher.enrich(track))
+
+
+def test_filename_enricher_artist_title_split(tmp_path):
+    result = _enrich(str(tmp_path / "Utada Hikaru - First Love.flac"))
+    assert result == {
+        "artist": "Utada Hikaru",
+        "title": "First Love",
+        "album": tmp_path.name,
+    }
+
+
+def test_filename_enricher_track_number_prefix(tmp_path):
+    # "01. Title" — no " - " separator, regex strips leading "01. "
+    result = _enrich(str(tmp_path / "01. First Love.flac"))
+    assert result and result.get("title") == "First Love"
+    assert "artist" not in result
+
+
+def test_filename_enricher_title_only(tmp_path):
+    result = _enrich(str(tmp_path / "First Love.flac"))
+    assert result and result.get("title") == "First Love"
+
+
+def test_filename_enricher_does_not_overwrite_existing_fields(tmp_path):
+    result = _enrich(
+        str(tmp_path / "Artist - Title.flac"),
+        artist="Existing Artist",
+        title="Existing Title",
+    )
+    assert result is None or ("artist" not in result and "title" not in result)
+
+
+def test_filename_enricher_non_local_returns_none():
+    enricher = FileNameEnricher()
+    track = TrackMeta(title="Song", artist="Artist")
+    assert asyncio.run(enricher.enrich(track)) is None
+
+
+def test_audio_tag_enricher_non_local_returns_none():
+    enricher = AudioTagEnricher()
+    track = TrackMeta(title="Song", artist="Artist")
+    assert asyncio.run(enricher.enrich(track)) is None
+
+
+def test_audio_tag_enricher_missing_file_returns_none(tmp_path):
+    enricher = AudioTagEnricher()
+    track = _local_track(tmp_path / "nonexistent.flac")
+    assert asyncio.run(enricher.enrich(track)) is None

tests/test_pipeline.py

@@ -277,3 +277,53 @@ def test_unsynced_cache_only_still_fetches_when_unsynced_disallowed(tmp_path):
     assert fetcher.called
     assert result is not None
     assert result.status == CacheStatus.SUCCESS_SYNCED
+
+
+# manual_insert
+
+
+def test_manual_insert_synced_stored_with_correct_status(tmp_path):
+    manager = make_manager(tmp_path)
+    manager.manual_insert(_track(), "[00:01.00]Hello\n[00:03.00]World\n")
+
+    rows = manager.cache.query_track(_track())
+    assert any(r["status"] == CacheStatus.SUCCESS_SYNCED.value for r in rows)
+
+
+def test_manual_insert_unsynced_stored_with_correct_status(tmp_path):
+    manager = make_manager(tmp_path)
+    manager.manual_insert(_track(), "Hello\nWorld\n")
+
+    rows = manager.cache.query_track(_track())
+    assert any(r["status"] == CacheStatus.SUCCESS_UNSYNCED.value for r in rows)
+
+
+def test_manual_insert_source_and_ttl(tmp_path):
+    manager = make_manager(tmp_path)
+    manager.manual_insert(_track(), "[00:01.00]line\n")
+
+    rows = manager.cache.query_track(_track())
+    assert all(r["source"] == "manual" for r in rows)
+    assert all(r["expires_at"] is None for r in rows)
+
+
+def test_manual_insert_overwrites_previous_entry(tmp_path):
+    manager = make_manager(tmp_path)
+    track = _track()
+    manager.manual_insert(track, "[00:01.00]old\n")
+    manager.manual_insert(track, "[00:01.00]new\n")
+
+    best = manager.cache.get_best(track, ["manual"])
+    assert best is not None
+    assert str(best.lyrics) == "[00:01.00]new"
+
+
+def test_manual_insert_is_returned_by_fetch(tmp_path):
+    manager = make_manager(tmp_path)
+    track = _track()
+    manager.manual_insert(track, "[00:01.00]cached\n")
+
+    result = manager.fetch_for_track(track)
+    assert result is not None
+    assert result.lyrics is not None
+    assert str(result.lyrics) == "[00:01.00]cached"

tests/test_watch.py

@@ -0,0 +1,455 @@
+from __future__ import annotations
+
+import asyncio
+from pathlib import Path
+
+from lrx_cli.lrc import LRCData
+from lrx_cli.models import TrackMeta
+from lrx_cli.watch.control import ControlClient, ControlServer, parse_delta
+from lrx_cli.watch.view import BaseOutput, LyricView, WatchState
+from lrx_cli.watch.view.pipe import PipeOutput
+from lrx_cli.watch.player import ActivePlayerSelector, PlayerState, PlayerTarget
+from lrx_cli.watch.fetcher import LyricFetcher
+from lrx_cli.config import AppConfig
+from lrx_cli.watch.tracker import PositionTracker
+from lrx_cli.watch.session import WatchCoordinator
+
+
+TEST_CONFIG = AppConfig()
+
+
+def test_parse_delta_supports_plus_minus_and_reset() -> None:
+    assert parse_delta("+200") == (True, 200, None)
+    assert parse_delta("-150") == (True, -150, None)
+    assert parse_delta("0") == (True, 0, None)
+
+
+def test_player_target_allows_all_when_hint_empty() -> None:
+    target = PlayerTarget()
+
+    assert target.allows("org.mpris.MediaPlayer2.spotify") is True
+    assert target.allows("org.mpris.MediaPlayer2.mpd") is True
+
+
+def test_player_target_filters_by_case_insensitive_substring() -> None:
+    target = PlayerTarget("Spot")
+
+    assert target.allows("org.mpris.MediaPlayer2.spotify") is True
+    assert target.allows("org.mpris.MediaPlayer2.mpd") is False
+
+
+def test_player_target_reports_blacklisted_hint() -> None:
+    target = PlayerTarget("spot", player_blacklist=("spotify",))
+    assert target.validation_error() is not None
+
+
+def test_active_player_selector_prefers_single_playing() -> None:
+    players = {
+        "org.mpris.MediaPlayer2.foo": PlayerState(
+            bus_name="org.mpris.MediaPlayer2.foo",
+            status="Paused",
+            track=TrackMeta(title="A"),
+        ),
+        "org.mpris.MediaPlayer2.bar": PlayerState(
+            bus_name="org.mpris.MediaPlayer2.bar",
+            status="Playing",
+            track=TrackMeta(title="B"),
+        ),
+    }
+    assert (
+        ActivePlayerSelector.select(players, None, TEST_CONFIG)
+        == "org.mpris.MediaPlayer2.bar"
+    )
+
+
+def test_active_player_selector_uses_last_active_when_no_playing() -> None:
+    players = {
+        "org.mpris.MediaPlayer2.foo": PlayerState(
+            bus_name="org.mpris.MediaPlayer2.foo",
+            status="Paused",
+            track=TrackMeta(title="A"),
+        ),
+        "org.mpris.MediaPlayer2.bar": PlayerState(
+            bus_name="org.mpris.MediaPlayer2.bar",
+            status="Stopped",
+            track=TrackMeta(title="B"),
+        ),
+    }
+
+    assert (
+        ActivePlayerSelector.select(
+            players,
+            "org.mpris.MediaPlayer2.bar",
+            TEST_CONFIG,
+        )
+        == "org.mpris.MediaPlayer2.bar"
+    )
+
+
+def test_position_tracker_seeked_calibrates_immediately() -> None:
+    async def _run() -> None:
+        async def _poll(_bus: str):
+            return 1200
+
+        tracker = PositionTracker(_poll, TEST_CONFIG)
+        await tracker.start()
+        await tracker.set_active_player(
+            "org.mpris.MediaPlayer2.foo", "Playing", "track-A"
+        )
+        await tracker.on_seeked("org.mpris.MediaPlayer2.foo", 3500)
+        pos = await tracker.get_position_ms()
+        await tracker.stop()
+        assert pos >= 3500
+
+    asyncio.run(_run())
+
+
+def test_position_tracker_playback_status_pause_stops_fast_growth() -> None:
+    async def _run() -> None:
+        async def _poll(_bus: str):
+            return 0
+
+        tracker = PositionTracker(_poll, TEST_CONFIG)
+        await tracker.start()
+        await tracker.set_active_player(
+            "org.mpris.MediaPlayer2.foo", "Playing", "track-A"
+        )
+        await asyncio.sleep(0.08)
+        before = await tracker.get_position_ms()
+
+        await tracker.on_playback_status("org.mpris.MediaPlayer2.foo", "Paused")
+        await asyncio.sleep(0.08)
+        after = await tracker.get_position_ms()
+        await tracker.stop()
+
+        assert before > 0
+        assert after - before < 20
+
+    asyncio.run(_run())
+
+
+def test_position_tracker_playback_status_playing_calibrates_once() -> None:
+    async def _run() -> None:
+        async def _poll(_bus: str):
+            return 50000
+
+        tracker = PositionTracker(_poll, TEST_CONFIG)
+        await tracker.start()
+        await tracker.set_active_player(
+            "org.mpris.MediaPlayer2.foo", "Paused", "track-A"
+        )
+        await tracker.on_playback_status("org.mpris.MediaPlayer2.foo", "Playing")
+        pos = await tracker.get_position_ms()
+        await tracker.stop()
+
+        assert pos >= 50000
+
+    asyncio.run(_run())
+
+
+def test_position_tracker_set_active_player_playing_calibrates_on_resume() -> None:
+    async def _run() -> None:
+        async def _poll(_bus: str):
+            return 42000
+
+        tracker = PositionTracker(_poll, TEST_CONFIG)
+        await tracker.start()
+        await tracker.set_active_player(
+            "org.mpris.MediaPlayer2.foo", "Paused", "track-A"
+        )
+        await tracker.set_active_player(
+            "org.mpris.MediaPlayer2.foo", "Playing", "track-A"
+        )
+        pos = await tracker.get_position_ms()
+        await tracker.stop()
+
+        assert pos >= 42000
+
+    asyncio.run(_run())
+
+
+def test_control_server_and_client_roundtrip(tmp_path: Path) -> None:
+    async def _run() -> None:
+        class _Session:
+            def __init__(self):
+                self.offset = 0
+
+            def handle_offset(self, delta: int) -> dict:
+                self.offset += delta
+                return {"ok": True, "offset_ms": self.offset}
+
+            def handle_status(self) -> dict:
+                return {"ok": True, "offset_ms": self.offset, "lyrics_status": "idle"}
+
+        socket_path = tmp_path / "watch.sock"
+        server = ControlServer(socket_path=socket_path, config=TEST_CONFIG)
+        session = _Session()
+
+        await server.start(session)  # type: ignore
+        client = ControlClient(socket_path=socket_path, config=TEST_CONFIG)
+        r1 = await client._send_async({"cmd": "offset", "delta": 200})
+        r2 = await client._send_async({"cmd": "status"})
+        await server.stop()
+
+        assert r1 == {"ok": True, "offset_ms": 200}
+        assert r2["ok"] is True
+        assert r2["offset_ms"] == 200
+
+    asyncio.run(_run())
+
+
+def test_pipe_output_prints_fixed_window_for_status(capsys) -> None:
+    output = PipeOutput(before=1, after=1)
+    state = WatchState(
+        track=None,
+        lyrics=None,
+        position_ms=0,
+        offset_ms=0,
+        status="fetching",
+    )
+
+    asyncio.run(output.on_state(state))
+
+    printed = capsys.readouterr().out
+    assert printed == "\n[fetching...]\n\n"
+
+
+def test_pipe_output_uses_context_window_for_lyrics(capsys) -> None:
+    output = PipeOutput(before=1, after=1)
+    lyrics = LRCData("[00:01.00]a\n[00:02.00]b\n[00:03.00]c")
+    state = WatchState(
+        track=TrackMeta(title="Song"),
+        lyrics=LyricView.from_lrc(lyrics),
+        position_ms=2100,
+        offset_ms=0,
+        status="ok",
+    )
+
+    asyncio.run(output.on_state(state))
+
+    printed = capsys.readouterr().out
+    assert printed == "a\nb\nc\n"
+
+
+def test_pipe_output_shows_upcoming_lines_before_first_timestamp(capsys) -> None:
+    output = PipeOutput(before=1, after=1)
+    lyrics = LRCData("[00:02.00]a\n[00:03.00]b")
+    state = WatchState(
+        track=TrackMeta(title="Song"),
+        lyrics=LyricView.from_lrc(lyrics),
+        position_ms=0,
+        offset_ms=0,
+        status="ok",
+    )
+
+    asyncio.run(output.on_state(state))
+
+    printed = capsys.readouterr().out
+    assert printed == "\n\na\n"
+
+
+def test_pipe_output_first_line_keeps_before_region_empty(capsys) -> None:
+    output = PipeOutput(before=1, after=1)
+    lyrics = LRCData("[00:01.00]a\n[00:02.00]b\n[00:03.00]c")
+    state = WatchState(
+        track=TrackMeta(title="Song"),
+        lyrics=LyricView.from_lrc(lyrics),
+        position_ms=1100,
+        offset_ms=0,
+        status="ok",
+    )
+
+    asyncio.run(output.on_state(state))
+
+    printed = capsys.readouterr().out
+    assert printed == "\na\nb\n"
+
+
+def test_pipe_output_last_line_keeps_after_region_empty(capsys) -> None:
+    output = PipeOutput(before=1, after=1)
+    lyrics = LRCData("[00:01.00]a\n[00:02.00]b\n[00:03.00]c")
+    state = WatchState(
+        track=TrackMeta(title="Song"),
+        lyrics=LyricView.from_lrc(lyrics),
+        position_ms=3100,
+        offset_ms=0,
+        status="ok",
+    )
+
+    asyncio.run(output.on_state(state))
+
+    printed = capsys.readouterr().out
+    assert printed == "b\nc\n\n"
+
+
+def test_pipe_output_repeated_text_uses_correct_timed_occurrence(capsys) -> None:
+    output = PipeOutput(before=1, after=1)
+    lyrics = LRCData("[00:01.00]A\n[00:02.00]X\n[00:03.00]B\n[00:04.00]X\n[00:05.00]C")
+    state = WatchState(
+        track=TrackMeta(title="Song"),
+        lyrics=LyricView.from_lrc(lyrics),
+        position_ms=4100,
+        offset_ms=0,
+        status="ok",
+    )
+
+    asyncio.run(output.on_state(state))
+
+    printed = capsys.readouterr().out
+    assert printed == "B\nX\nC\n"
+
+
+def test_session_fetches_on_resume_playing_without_lyrics() -> None:
+    async def _run() -> None:
+        class _Manager:
+            def fetch_for_track(self, *_args, **_kwargs):
+                return None
+
+        class _Output(BaseOutput):
+            async def on_state(self, state: WatchState) -> None:
+                return None
+
+        class _Fetcher(LyricFetcher):
+            def __init__(self):
+                async def _fetch(_track: TrackMeta):
+                    return None
+
+                async def _on_fetching() -> None:
+                    return None
+
+                async def _on_result(_lyrics) -> None:
+                    return None
+
+                super().__init__(_fetch, _on_fetching, _on_result, TEST_CONFIG)
+                self.requested = []
+
+            def request(self, track: TrackMeta) -> None:
+                self.requested.append(track.display_name())
+
+        session = WatchCoordinator(
+            _Manager(),  # type: ignore
+            _Output(),
+            player_hint=None,
+            config=TEST_CONFIG,
+        )
+        fake_fetcher = _Fetcher()
+        session._fetcher = fake_fetcher
+        session._tracker = PositionTracker(
+            lambda _bus: asyncio.sleep(0, result=0),
+            TEST_CONFIG,
+        )
+
+        bus_name = "org.mpris.MediaPlayer2.spotify"
+        track = TrackMeta(title="Song", artist="Artist")
+        session._model.active_player = bus_name
+        session._player_monitor.players = {
+            bus_name: PlayerState(bus_name=bus_name, status="Playing", track=track)
+        }
+        session._model.set_lyrics(None)
+        session._model.status = "paused"
+
+        session._on_playback_status(bus_name, "Playing")
+        await asyncio.sleep(0)
+
+        assert fake_fetcher.requested == ["Artist - Song"]
+        assert session._model.status == "fetching"
+
+    asyncio.run(_run())
+
+
+def test_session_emit_state_only_when_lyric_cursor_changes() -> None:
+    async def _run() -> None:
+        class _Manager:
+            def fetch_for_track(self, *_args, **_kwargs):
+                return None
+
+        class _Output(BaseOutput):
+            def __init__(self):
+                self.count = 0
+
+            async def on_state(self, state: WatchState) -> None:
+                self.count += 1
+
+        output = _Output()
+        session = WatchCoordinator(
+            _Manager(),  # type: ignore
+            output,
+            player_hint=None,
+            config=TEST_CONFIG,
+        )
+        session._tracker = PositionTracker(
+            lambda _bus: asyncio.sleep(0, result=0),
+            TEST_CONFIG,
+        )
+
+        bus_name = "org.mpris.MediaPlayer2.spotify"
+        track = TrackMeta(title="Song", artist="Artist")
+        session._model.active_player = bus_name
+        session._player_monitor.players = {
+            bus_name: PlayerState(bus_name=bus_name, status="Playing", track=track)
+        }
+        session._model.set_lyrics(LRCData("[00:01.00]a\n[00:03.00]b"))
+        session._model.status = "ok"
+        await session._tracker.set_active_player(
+            bus_name,
+            "Playing",
+            "Artist - Song",
+        )
+
+        await session._emit_state()
+        await session._emit_state()
+
+        await session._tracker.on_seeked(bus_name, 3200)
+        await session._emit_state()
+
+        assert output.count == 2
+
+    asyncio.run(_run())
+
+
+def test_session_emits_when_crossing_first_timestamp() -> None:
+    async def _run() -> None:
+        class _Manager:
+            def fetch_for_track(self, *_args, **_kwargs):
+                return None
+
+        class _Output(BaseOutput):
+            def __init__(self):
+                self.count = 0
+
+            async def on_state(self, state: WatchState) -> None:
+                self.count += 1
+
+        output = _Output()
+        session = WatchCoordinator(
+            _Manager(),  # type: ignore
+            output,
+            player_hint=None,
+            config=TEST_CONFIG,
+        )
+        session._tracker = PositionTracker(
+            lambda _bus: asyncio.sleep(0, result=0),
+            TEST_CONFIG,
+        )
+
+        bus_name = "org.mpris.MediaPlayer2.spotify"
+        track = TrackMeta(title="Song", artist="Artist")
+        session._model.active_player = bus_name
+        session._player_monitor.players = {
+            bus_name: PlayerState(bus_name=bus_name, status="Playing", track=track)
+        }
+        session._model.set_lyrics(LRCData("[00:02.00]a\n[00:03.00]b"))
+        session._model.status = "ok"
+        await session._tracker.set_active_player(
+            bus_name,
+            "Playing",
+            "Artist - Song",
+        )
+
+        await session._emit_state()
+        await session._tracker.on_seeked(bus_name, 2500)
+        await session._emit_state()
+
+        assert output.count == 2
+
+    asyncio.run(_run())

uv.lock

@@ -43,7 +43,7 @@ wheels = [
 
 [[package]]
 name = "cyclopts"
-version = "4.10.1"
+version = "4.10.2"
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 dependencies = [
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     { name = "rich-rst" },
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+    { url = "https://files.pythonhosted.org/packages/b4/bd/05055d8360cef0757d79367157f3b15c0a0715e81e08f86a04018ec045f0/cyclopts-4.10.2-py3-none-any.whl", hash = "sha256:a1f2d6f8f7afac9456b48f75a40b36658778ddc9c6d406b520d017ae32c990fe", size = 204314, upload-time = "2026-04-08T23:57:46.969Z" },
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 [[package]]
@@ -153,7 +153,7 @@ wheels = [
 
 [[package]]
 name = "lrx-cli"
-version = "0.6.4"
+version = "0.6.5"
 source = { editable = "." }
 dependencies = [
     { name = "cyclopts" },
@@ -162,7 +162,6 @@ dependencies = [
     { name = "loguru" },
     { name = "mutagen" },
     { name = "platformdirs" },
-    { name = "python-dotenv" },
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@@ -178,8 +177,7 @@ requires-dist = [
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     { name = "loguru", specifier = ">=0.7.3" },
     { name = "mutagen", specifier = ">=1.47.0" },
-    { name = "platformdirs", specifier = ">=4.9.4" },
-    { name = "python-dotenv", specifier = ">=1.2.2" },
+    { name = "platformdirs", specifier = ">=4.9.6" },
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@@ -229,11 +227,11 @@ wheels = [
 
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+    { url = "https://files.pythonhosted.org/packages/75/a6/a0a304dc33b49145b21f4808d763822111e67d1c3a32b524a1baf947b6e1/platformdirs-4.9.6-py3-none-any.whl", hash = "sha256:e61adb1d5e5cb3441b4b7710bea7e4c12250ca49439228cc1021c00dcfac0917", size = 21348, upload-time = "2026-04-09T00:04:09.463Z" },
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 [[package]]
@@ -247,16 +245,16 @@ wheels = [
 
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+version = "2.20.0"
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+    { url = "https://files.pythonhosted.org/packages/f4/7e/a72dd26f3b0f4f2bf1dd8923c85f7ceb43172af56d63c7383eb62b332364/pygments-2.20.0-py3-none-any.whl", hash = "sha256:81a9e26dd42fd28a23a2d169d86d7ac03b46e2f8b59ed4698fb4785f946d0176", size = 1231151, upload-time = "2026-03-29T13:29:30.038Z" },
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-version = "9.0.2"
+version = "9.0.3"
 source = { registry = "https://pypi.org/simple" }
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     { name = "colorama", marker = "sys_platform == 'win32'" },
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