feat(releases): Phase 1 — new filesystem release domain + TmdbId VO

First step of specs/dot_alfred_v2.md. Introduces a separate bounded
context (alfred/domain/releases/) for the filesystem-side aggregates,
disjoint from TMDB identity which stays in tv_shows/ and movies/.
The link between the two worlds is TmdbId, used as the natural key
in the persistence layer (no domain-level reference).

New package alfred/domain/releases/:
- value_objects: EpisodeRange (covers SxxE01E02E03 multi-episode
  files via start/end inclusive range, with count/numbers/is_single
  helpers), ReleaseMode enum (PACK = N video files direct in the
  season folder, EPISODIC = N sub-folders).
- entities: TrackProfile, EpisodeRelease, SeasonRelease (with
  episode_count() summing each EpisodeRange.count()), SeriesRelease
  (tmdb_id primary anchor, optional imdb_id secondary), MovieRelease.
  All frozen dataclasses.
- builders: SeasonReleaseBuilder + SeriesReleaseBuilder mirroring
  the v1 TVShowBuilder pattern. Builders sort episodes by range
  start on emit and reject overlapping ranges (two files claiming
  the same TMDB slot). from_existing() seeds a builder from an
  existing frozen aggregate for round-trip edits.
- repositories: abstract ports (SeriesReleaseRepository,
  MovieReleaseRepository); concrete .alfred sidecar impls arrive
  in Phase 2.

New shared VO alfred/domain/shared/value_objects.py::TmdbId — positive
int, rejects bool/str/float, symmetric with the existing ImdbId VO.

73 unit tests cover VO validation, entity invariants, builder sort
+ overlap detection, and from_existing() round-trips.

v1 code paths are untouched at this stage; the new domain coexists
with the old TVShow aggregate until Phase 3 refactors it.

CHANGELOG.md

@@ -17,6 +17,33 @@ callers).
 
 ### Added
 
+- **`.alfred` v2 — Phase 1: new `releases/` domain.** First step of
+  `specs/dot_alfred_v2.md` on branch `refactor/dot-alfred-v2`. The
+  new `alfred/domain/releases/` package introduces a filesystem-only
+  bounded context separated from TMDB identity (the existing
+  `tv_shows` / `movies` domains). It hosts:
+  - **`EpisodeRange` VO** — covers single-episode files
+    (`EpisodeRange(E02, E02)`) and multi-episode files
+    (`EpisodeRange(E02, E04)` for `SxxE02E03E04.mkv`), with
+    `count()` / `numbers()` / `is_single()` helpers.
+  - **`ReleaseMode` enum** — `PACK` (N video files directly in the
+    season folder) vs `EPISODIC` (N sub-folders, one episode each);
+    classified by the walker, never re-derived.
+  - **Aggregates** — `TrackProfile`, `EpisodeRelease`,
+    `SeasonRelease` (with `episode_count()` summing each file's
+    range), `SeriesRelease`, `MovieRelease`. All frozen
+    dataclasses; mutation via `SeasonReleaseBuilder` /
+    `SeriesReleaseBuilder` (mirror the v1 `TVShowBuilder` pattern,
+    including `from_existing()` round-trip).
+  - **Abstract ports** — `SeriesReleaseRepository`,
+    `MovieReleaseRepository` (concrete `DotAlfred*` arrive in
+    Phase 2).
+  - **`TmdbId` VO** added to `alfred/domain/shared/value_objects.py`
+    (positive int, rejects bool/str/float — symmetry with `ImdbId`).
+- 73 unit tests covering VO validation, entity invariants, builder
+  sort + overlap detection, and `from_existing()` round-trips. v1
+  code paths untouched at this stage; new domain coexists.
+
 - **`rescan_show` orchestrator
   (`alfred/application/library/rescan.py`).** Step 4 of the
   `specs/dot_alfred.md` plan. Walks an Alfred-managed show folder,

alfred/domain/releases/__init__.py

@@ -0,0 +1,38 @@
+"""Filesystem release aggregates — what the user owns on disk.
+
+This bounded context is intentionally separated from
+``alfred.domain.tv_shows`` / ``alfred.domain.movies`` (TMDB identity).
+A :class:`SeriesRelease` describes the physical files on disk for one
+show; a :class:`TVShow` describes the work as catalogued by TMDB. The
+two are linked by :class:`~alfred.domain.shared.value_objects.TmdbId`
+in the persistence layer, never by direct reference.
+
+Not to be confused with ``alfred.domain.release`` (singular) which
+parses release **names** (strings → tokens). The two packages may be
+merged later; for now they coexist as separate concerns.
+"""
+
+from .builders import SeasonReleaseBuilder, SeriesReleaseBuilder
+from .entities import (
+    EpisodeRelease,
+    MovieRelease,
+    SeasonRelease,
+    SeriesRelease,
+    TrackProfile,
+)
+from .repositories import MovieReleaseRepository, SeriesReleaseRepository
+from .value_objects import EpisodeRange, ReleaseMode
+
+__all__ = [
+    "EpisodeRange",
+    "EpisodeRelease",
+    "MovieRelease",
+    "MovieReleaseRepository",
+    "ReleaseMode",
+    "SeasonRelease",
+    "SeasonReleaseBuilder",
+    "SeriesRelease",
+    "SeriesReleaseBuilder",
+    "SeriesReleaseRepository",
+    "TrackProfile",
+]

alfred/domain/releases/builders.py

@@ -0,0 +1,234 @@
+"""Builders for the filesystem release aggregates.
+
+The aggregates are frozen — :class:`SeriesRelease`, :class:`SeasonRelease`,
+and :class:`EpisodeRelease` are ``@dataclass(frozen=True)`` and offer no
+mutation methods. All construction goes through these builders, which
+assemble the aggregate piece by piece and emit a frozen instance via
+``build()``.
+
+Typical usage during a filesystem walk::
+
+    builder = SeriesReleaseBuilder(tmdb_id=TmdbId(84958), imdb_id=ImdbId("tt0804484"))
+    sb = builder.season_builder(SeasonNumber(1), folder="Show.S01", mode=ReleaseMode.PACK)
+    sb.add_episode(EpisodeRelease(
+        episodes=EpisodeRange(EpisodeNumber(1), EpisodeNumber(1)),
+        file_path=FilePath("Show.S01/Show.S01E01.mkv"),
+        tracks=TrackProfile(),
+    ))
+    release = builder.build()
+
+Builders are **single-use scratchpads**: they hold mutable state during
+construction, then produce an immutable aggregate.
+
+Invariants enforced at ``build()`` time:
+
+* Seasons are emitted sorted by ``season_number``.
+* Episodes within each season are emitted sorted by their
+  ``EpisodeRange.start`` (so a season with ``E01-E03`` + ``E04`` is
+  emitted in that order).
+* No two ``EpisodeRelease`` within a season may overlap (same TMDB
+  episode covered by two distinct files) — raises ``ValidationError``.
+"""
+
+from __future__ import annotations
+
+from ..shared.exceptions import ValidationError
+from ..shared.value_objects import ImdbId, TmdbId
+from ..tv_shows.value_objects import SeasonNumber
+from .entities import (
+    EpisodeRelease,
+    SeasonRelease,
+    SeriesRelease,
+)
+from .value_objects import ReleaseMode
+
+# ════════════════════════════════════════════════════════════════════════════
+# SeasonReleaseBuilder
+# ════════════════════════════════════════════════════════════════════════════
+
+
+class SeasonReleaseBuilder:
+    """
+    Mutable scratchpad for a :class:`SeasonRelease`.
+
+    Episodes are appended in arbitrary order; ``build()`` sorts them by
+    their range start before emitting the frozen aggregate and verifies
+    there are no overlapping ranges.
+    """
+
+    def __init__(
+        self,
+        season_number: SeasonNumber | int,
+        *,
+        folder: str,
+        mode: ReleaseMode,
+    ) -> None:
+        if isinstance(season_number, int):
+            season_number = SeasonNumber(season_number)
+        self._season_number: SeasonNumber = season_number
+        self._folder: str = folder
+        self._mode: ReleaseMode = mode
+        self._episodes: list[EpisodeRelease] = []
+
+    @classmethod
+    def from_existing(cls, season: SeasonRelease) -> SeasonReleaseBuilder:
+        """Seed a builder from an existing frozen :class:`SeasonRelease`."""
+        builder = cls(
+            season.season_number,
+            folder=season.folder,
+            mode=season.mode,
+        )
+        builder._episodes = list(season.episodes)
+        return builder
+
+    @property
+    def season_number(self) -> SeasonNumber:
+        return self._season_number
+
+    @property
+    def mode(self) -> ReleaseMode:
+        return self._mode
+
+    def set_folder(self, folder: str) -> SeasonReleaseBuilder:
+        self._folder = folder
+        return self
+
+    def set_mode(self, mode: ReleaseMode) -> SeasonReleaseBuilder:
+        self._mode = mode
+        return self
+
+    def add_episode(self, episode: EpisodeRelease) -> SeasonReleaseBuilder:
+        """Append a physical-file :class:`EpisodeRelease` to this season."""
+        self._episodes.append(episode)
+        return self
+
+    def build(self) -> SeasonRelease:
+        """Emit a frozen :class:`SeasonRelease` with episodes sorted.
+
+        Raises :class:`ValidationError` if any two episode ranges overlap
+        (same TMDB slot claimed by two distinct files).
+        """
+        ordered = tuple(
+            sorted(self._episodes, key=lambda ep: ep.episodes.start.value)
+        )
+        # Overlap check — ranges are inclusive on both ends, sorted by start.
+        for prev, curr in zip(ordered, ordered[1:], strict=False):
+            if curr.episodes.start.value <= prev.episodes.end.value:
+                raise ValidationError(
+                    f"SeasonRelease season {self._season_number}: overlapping "
+                    f"episode ranges {prev.episodes} and {curr.episodes}"
+                )
+        return SeasonRelease(
+            season_number=self._season_number,
+            folder=self._folder,
+            mode=self._mode,
+            episodes=ordered,
+        )
+
+
+# ════════════════════════════════════════════════════════════════════════════
+# SeriesReleaseBuilder
+# ════════════════════════════════════════════════════════════════════════════
+
+
+class SeriesReleaseBuilder:
+    """
+    Mutable scratchpad for the :class:`SeriesRelease` aggregate root.
+
+    Seasons are tracked via internal :class:`SeasonReleaseBuilder`
+    instances keyed by :class:`SeasonNumber`.
+    """
+
+    def __init__(
+        self,
+        *,
+        tmdb_id: TmdbId | int,
+        imdb_id: ImdbId | str | None = None,
+    ) -> None:
+        if isinstance(tmdb_id, int):
+            tmdb_id = TmdbId(tmdb_id)
+        if isinstance(imdb_id, str):
+            imdb_id = ImdbId(imdb_id)
+        self._tmdb_id: TmdbId = tmdb_id
+        self._imdb_id: ImdbId | None = imdb_id
+        self._season_builders: dict[SeasonNumber, SeasonReleaseBuilder] = {}
+
+    @classmethod
+    def from_existing(cls, release: SeriesRelease) -> SeriesReleaseBuilder:
+        """Seed a builder from an existing frozen :class:`SeriesRelease`."""
+        builder = cls(
+            tmdb_id=release.tmdb_id,
+            imdb_id=release.imdb_id,
+        )
+        for season in release.seasons:
+            builder._season_builders[season.season_number] = (
+                SeasonReleaseBuilder.from_existing(season)
+            )
+        return builder
+
+    # ── Top-level mutators ─────────────────────────────────────────────────
+
+    def set_imdb_id(self, imdb_id: ImdbId | str | None) -> SeriesReleaseBuilder:
+        if isinstance(imdb_id, str):
+            imdb_id = ImdbId(imdb_id)
+        self._imdb_id = imdb_id
+        return self
+
+    # ── Content ────────────────────────────────────────────────────────────
+
+    def season_builder(
+        self,
+        season_number: SeasonNumber | int,
+        *,
+        folder: str | None = None,
+        mode: ReleaseMode | None = None,
+    ) -> SeasonReleaseBuilder:
+        """
+        Return (creating if needed) the :class:`SeasonReleaseBuilder` for a
+        season.
+
+        ``folder`` and ``mode`` are required when the builder does not yet
+        exist for this season; subsequent calls may pass them to override.
+        """
+        if isinstance(season_number, int):
+            season_number = SeasonNumber(season_number)
+        sb = self._season_builders.get(season_number)
+        if sb is None:
+            if folder is None or mode is None:
+                raise ValidationError(
+                    f"season_builder({season_number}): folder and mode "
+                    f"are required to create a new season builder"
+                )
+            sb = SeasonReleaseBuilder(season_number, folder=folder, mode=mode)
+            self._season_builders[season_number] = sb
+        else:
+            if folder is not None:
+                sb.set_folder(folder)
+            if mode is not None:
+                sb.set_mode(mode)
+        return sb
+
+    def add_season(self, season: SeasonRelease) -> SeriesReleaseBuilder:
+        """
+        Attach (or replace) a fully-built :class:`SeasonRelease`.
+
+        Replaces any existing season with the same number.
+        """
+        self._season_builders[season.season_number] = (
+            SeasonReleaseBuilder.from_existing(season)
+        )
+        return self
+
+    # ── Emit ───────────────────────────────────────────────────────────────
+
+    def build(self) -> SeriesRelease:
+        """Emit a frozen :class:`SeriesRelease` with seasons sorted by number."""
+        ordered_seasons = tuple(
+            self._season_builders[n].build()
+            for n in sorted(self._season_builders, key=lambda x: x.value)
+        )
+        return SeriesRelease(
+            tmdb_id=self._tmdb_id,
+            imdb_id=self._imdb_id,
+            seasons=ordered_seasons,
+        )

alfred/domain/releases/entities.py

@@ -0,0 +1,204 @@
+"""Filesystem release aggregates.
+
+The release domain models what the user owns on disk — one
+:class:`SeriesRelease` per show, one :class:`MovieRelease` per movie.
+TMDB identity (title, status, episode_count, …) lives in the
+``tv_shows`` / ``movies`` domains and is linked via the
+:class:`~alfred.domain.shared.value_objects.TmdbId` natural key.
+
+All entities are frozen. Mutation goes through the builders in
+:mod:`alfred.domain.releases.builders`.
+"""
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+
+from ..shared.exceptions import ValidationError
+from ..shared.media import AudioTrack, SubtitleTrack
+from ..shared.value_objects import FilePath, ImdbId, TmdbId
+from ..tv_shows.value_objects import SeasonNumber
+from .value_objects import EpisodeRange, ReleaseMode
+
+__all__ = [
+    "EpisodeRelease",
+    "MovieRelease",
+    "SeasonRelease",
+    "SeriesRelease",
+    "TrackProfile",
+]
+
+
+@dataclass(frozen=True)
+class TrackProfile:
+    """
+    Audio + subtitle tracks of one physical file.
+
+    Tracks live per-file (not per-season): every ``EpisodeRelease`` and
+    ``MovieRelease`` carries its own ``TrackProfile``. Season-level
+    aggregation is computed by the caller when needed.
+    """
+
+    audio_tracks: tuple[AudioTrack, ...] = ()
+    subtitle_tracks: tuple[SubtitleTrack, ...] = ()
+
+
+@dataclass(frozen=True)
+class EpisodeRelease:
+    """
+    One physical episode file (or multi-episode file) on disk.
+
+    :attr:`episodes` is an :class:`EpisodeRange` — a single ``.mkv``
+    that covers ``S01E02E03`` carries ``EpisodeRange(start=E02, end=E03)``
+    and is recorded once. The library index lists it under each covered
+    slot (``E02``, ``E03``) for symmetric lookups.
+
+    :attr:`file_path` is **relative to the show root** (e.g.
+    ``"Show.S01/Show.S01E02.mkv"`` for PACK,
+    ``"Show.S01/Show.S01E02-RG/Show.S01E02-RG.mkv"`` for EPISODIC).
+    The caller (repository) prepends the absolute show root when
+    needed.
+    """
+
+    episodes: EpisodeRange
+    file_path: FilePath
+    tracks: TrackProfile = TrackProfile()
+
+
+@dataclass(frozen=True)
+class SeasonRelease:
+    """
+    All physical files on disk for one season of a show.
+
+    The :attr:`mode` flag records the filesystem layout:
+
+    * :attr:`ReleaseMode.PACK` — the season folder contains N video
+      files directly. ``episodes`` lists each ``.mkv`` in the folder.
+    * :attr:`ReleaseMode.EPISODIC` — the season folder contains N
+      sub-folders, each with one episode. ``episodes`` lists each
+      ``(subfolder, file)`` pair.
+
+    :attr:`folder` is the season folder name, relative to the show root.
+
+    Invariant: every ``EpisodeRelease.episodes`` range stays within
+    sane bounds (validated at construction). Cross-episode duplicate
+    detection (two files claiming the same TMDB slot) is the
+    builder's job, not the entity's.
+    """
+
+    season_number: SeasonNumber
+    folder: str
+    mode: ReleaseMode
+    episodes: tuple[EpisodeRelease, ...] = ()
+
+    def __post_init__(self) -> None:
+        if not isinstance(self.season_number, SeasonNumber):
+            raise ValidationError(
+                f"SeasonRelease.season_number must be SeasonNumber, "
+                f"got {type(self.season_number)}"
+            )
+        if not isinstance(self.mode, ReleaseMode):
+            raise ValidationError(
+                f"SeasonRelease.mode must be ReleaseMode, got {type(self.mode)}"
+            )
+        if not isinstance(self.folder, str) or not self.folder:
+            raise ValidationError(
+                f"SeasonRelease.folder must be a non-empty string, "
+                f"got {self.folder!r}"
+            )
+
+    def episode_count(self) -> int:
+        """
+        Total number of TMDB episode slots covered by all physical files.
+
+        Sums each :meth:`EpisodeRange.count` — a season with two files
+        ``E01`` + ``E02-E03`` returns ``3`` (one slot from the first
+        file, two from the second).
+
+        Compared by the caller against the library index's TMDB
+        ``episode_count`` to detect incomplete seasons.
+        """
+        return sum(ep.episodes.count() for ep in self.episodes)
+
+
+@dataclass(frozen=True)
+class SeriesRelease:
+    """
+    All physical seasons on disk for one show.
+
+    Anchored to TMDB by :attr:`tmdb_id` (primary key). :attr:`imdb_id`
+    is optional and stored as a secondary anchor — useful for the
+    occasional show without TMDB coverage, and for cross-checking
+    when both ids are known.
+
+    Seasons are exposed sorted by ``season_number`` (the builder
+    enforces this on emit). No duplicate ``season_number`` is
+    permitted across :attr:`seasons`.
+    """
+
+    tmdb_id: TmdbId
+    imdb_id: ImdbId | None
+    seasons: tuple[SeasonRelease, ...] = ()
+
+    def __post_init__(self) -> None:
+        if not isinstance(self.tmdb_id, TmdbId):
+            raise ValidationError(
+                f"SeriesRelease.tmdb_id must be TmdbId, got {type(self.tmdb_id)}"
+            )
+        if self.imdb_id is not None and not isinstance(self.imdb_id, ImdbId):
+            raise ValidationError(
+                f"SeriesRelease.imdb_id must be ImdbId or None, "
+                f"got {type(self.imdb_id)}"
+            )
+        seen: set[int] = set()
+        for s in self.seasons:
+            if s.season_number.value in seen:
+                raise ValidationError(
+                    f"SeriesRelease has duplicate season "
+                    f"{s.season_number}"
+                )
+            seen.add(s.season_number.value)
+
+    def get_season(self, season_number: SeasonNumber) -> SeasonRelease | None:
+        """Return the :class:`SeasonRelease` for ``season_number`` or ``None``."""
+        for s in self.seasons:
+            if s.season_number == season_number:
+                return s
+        return None
+
+
+@dataclass(frozen=True)
+class MovieRelease:
+    """
+    A single physical movie file on disk.
+
+    Anchored to TMDB by :attr:`tmdb_id`; :attr:`imdb_id` optional
+    secondary anchor.
+
+    :attr:`folder` is the movie folder name relative to the
+    ``movies/`` library root. :attr:`file_path` is the video file
+    name relative to the folder (movies are one folder, one file in
+    Alfred's layout — no sub-folders).
+    """
+
+    tmdb_id: TmdbId
+    imdb_id: ImdbId | None
+    folder: str
+    file_path: FilePath
+    tracks: TrackProfile = TrackProfile()
+
+    def __post_init__(self) -> None:
+        if not isinstance(self.tmdb_id, TmdbId):
+            raise ValidationError(
+                f"MovieRelease.tmdb_id must be TmdbId, got {type(self.tmdb_id)}"
+            )
+        if self.imdb_id is not None and not isinstance(self.imdb_id, ImdbId):
+            raise ValidationError(
+                f"MovieRelease.imdb_id must be ImdbId or None, "
+                f"got {type(self.imdb_id)}"
+            )
+        if not isinstance(self.folder, str) or not self.folder:
+            raise ValidationError(
+                f"MovieRelease.folder must be a non-empty string, "
+                f"got {self.folder!r}"
+            )

alfred/domain/releases/repositories.py

@@ -0,0 +1,79 @@
+"""Repository ports for the filesystem release domain.
+
+One repository per aggregate root:
+
+* :class:`SeriesReleaseRepository` — persists :class:`SeriesRelease`
+  (one per TV show).
+* :class:`MovieReleaseRepository` — persists :class:`MovieRelease`
+  (one per movie).
+
+Implementations live in the infrastructure layer. The
+``DotAlfred*ReleaseRepository`` concrete classes write the per-show /
+per-movie ``.alfred`` sidecar (the release-only sidecar — the
+``.alfred.index`` library file is handled by separate
+``LibraryIndex`` repositories defined alongside the TMDB-side
+aggregates).
+"""
+
+from abc import ABC, abstractmethod
+
+from ..shared.value_objects import TmdbId
+from .entities import MovieRelease, SeriesRelease
+
+
+class SeriesReleaseRepository(ABC):
+    """
+    Abstract repository for :class:`SeriesRelease` aggregates.
+
+    Persistence is per-show: each call to :meth:`save` writes the full
+    aggregate (all seasons + all episode files + tracks) atomically.
+    """
+
+    @abstractmethod
+    def save(self, release: SeriesRelease) -> None:
+        """Persist the full SeriesRelease aggregate."""
+
+    @abstractmethod
+    def find_by_tmdb_id(self, tmdb_id: TmdbId) -> SeriesRelease | None:
+        """Load the SeriesRelease for ``tmdb_id``, or None if absent."""
+
+    @abstractmethod
+    def find_all(self) -> list[SeriesRelease]:
+        """Load all SeriesRelease aggregates known to the store."""
+
+    @abstractmethod
+    def delete(self, tmdb_id: TmdbId) -> bool:
+        """Remove the aggregate. Returns True if it existed and was deleted."""
+
+    @abstractmethod
+    def exists(self, tmdb_id: TmdbId) -> bool:
+        """True if the aggregate exists in the store."""
+
+
+class MovieReleaseRepository(ABC):
+    """
+    Abstract repository for :class:`MovieRelease` aggregates.
+
+    Mirrors :class:`SeriesReleaseRepository`; the movie aggregate is a
+    single file so persistence is naturally atomic per movie.
+    """
+
+    @abstractmethod
+    def save(self, release: MovieRelease) -> None:
+        """Persist the MovieRelease aggregate."""
+
+    @abstractmethod
+    def find_by_tmdb_id(self, tmdb_id: TmdbId) -> MovieRelease | None:
+        """Load the MovieRelease for ``tmdb_id``, or None if absent."""
+
+    @abstractmethod
+    def find_all(self) -> list[MovieRelease]:
+        """Load all MovieRelease aggregates known to the store."""
+
+    @abstractmethod
+    def delete(self, tmdb_id: TmdbId) -> bool:
+        """Remove the aggregate. Returns True if it existed and was deleted."""
+
+    @abstractmethod
+    def exists(self, tmdb_id: TmdbId) -> bool:
+        """True if the aggregate exists in the store."""

alfred/domain/releases/value_objects.py

@@ -0,0 +1,89 @@
+"""Value objects for the filesystem release domain."""
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+from enum import Enum
+
+from ..shared.exceptions import ValidationError
+from ..tv_shows.value_objects import EpisodeNumber
+
+
+class ReleaseMode(str, Enum):
+    """
+    Filesystem layout of a season release.
+
+    Determined structurally by the walker — not a guess:
+
+    * ``PACK`` — the season folder contains N video files directly.
+      A single release group posted the whole season as N files in
+      one folder.
+    * ``EPISODIC`` — the season folder contains N sub-folders, each
+      holding one episode (and its adjacent subs / nfo / etc.).
+      Episodes were acquired one-by-one, possibly from different
+      release groups.
+
+    The mode is stored explicitly on :class:`SeasonRelease`; the
+    walker never has to re-derive it after the first scan.
+    """
+
+    PACK = "pack"
+    EPISODIC = "episodic"
+
+
+@dataclass(frozen=True)
+class EpisodeRange:
+    """
+    Episode coverage of one physical release file.
+
+    A single-episode file (``Show.S01E02.mkv``) is represented as
+    ``EpisodeRange(start=E02, end=E02)``.
+
+    A multi-episode file (``Show.S01E02E03E04.mkv``) is represented as
+    ``EpisodeRange(start=E02, end=E04)``. Ranges are inclusive on both
+    ends and must satisfy ``end >= start``.
+
+    The VO carries no opinion about file paths or tracks — those live on
+    :class:`EpisodeRelease`. ``EpisodeRange`` is purely about which TMDB
+    episode slots a given physical file covers.
+    """
+
+    start: EpisodeNumber
+    end: EpisodeNumber
+
+    def __post_init__(self) -> None:
+        if not isinstance(self.start, EpisodeNumber):
+            raise ValidationError(
+                f"EpisodeRange.start must be EpisodeNumber, got {type(self.start)}"
+            )
+        if not isinstance(self.end, EpisodeNumber):
+            raise ValidationError(
+                f"EpisodeRange.end must be EpisodeNumber, got {type(self.end)}"
+            )
+        if self.end.value < self.start.value:
+            raise ValidationError(
+                f"EpisodeRange end ({self.end}) must be >= start ({self.start})"
+            )
+
+    def count(self) -> int:
+        """Number of TMDB episodes covered by this range (inclusive)."""
+        return self.end.value - self.start.value + 1
+
+    def numbers(self) -> tuple[EpisodeNumber, ...]:
+        """All :class:`EpisodeNumber` values covered, in ascending order."""
+        return tuple(
+            EpisodeNumber(n)
+            for n in range(self.start.value, self.end.value + 1)
+        )
+
+    def is_single(self) -> bool:
+        """True if the range covers exactly one episode (``start == end``)."""
+        return self.start == self.end
+
+    def __str__(self) -> str:
+        if self.is_single():
+            return f"E{self.start.value:02d}"
+        return f"E{self.start.value:02d}-E{self.end.value:02d}"
+
+    def __repr__(self) -> str:
+        return f"EpisodeRange({self.start.value}, {self.end.value})"

alfred/domain/shared/value_objects.py

@@ -42,6 +42,42 @@ class ImdbId:
         return f"ImdbId('{self.value}')"
 
 
+@dataclass(frozen=True)
+class TmdbId:
+    """
+    Value object representing a TMDB ID.
+
+    TMDB ids are positive integers. The same id is used across the TMDB API
+    for a given work (movie or TV show); the type qualifier (``movie`` /
+    ``tv``) lives at the call site, not in the VO.
+
+    Stored as ``int`` (not zero-padded string) — TMDB exposes ids as
+    integers in their API responses.
+    """
+
+    value: int
+
+    def __post_init__(self) -> None:
+        # bool is a subclass of int in Python — reject explicitly so that
+        # ``TmdbId(True)`` does not silently become ``TmdbId(1)``.
+        if isinstance(self.value, bool) or not isinstance(self.value, int):
+            raise ValidationError(
+                f"TMDB ID must be an integer, got {type(self.value)}"
+            )
+
+        if self.value <= 0:
+            raise ValidationError(f"TMDB ID must be positive, got {self.value}")
+
+    def __str__(self) -> str:
+        return str(self.value)
+
+    def __repr__(self) -> str:
+        return f"TmdbId({self.value})"
+
+    def __int__(self) -> int:
+        return self.value
+
+
 @dataclass(frozen=True)
 class FilePath:
     """

tests/domain/releases/test_builders.py

@@ -0,0 +1,184 @@
+"""Tests for the releases domain builders."""
+
+import pytest
+
+from alfred.domain.releases.builders import (
+    SeasonReleaseBuilder,
+    SeriesReleaseBuilder,
+)
+from alfred.domain.releases.entities import EpisodeRelease, TrackProfile
+from alfred.domain.releases.value_objects import EpisodeRange, ReleaseMode
+from alfred.domain.shared.exceptions import ValidationError
+from alfred.domain.shared.value_objects import FilePath, ImdbId, TmdbId
+from alfred.domain.tv_shows.value_objects import EpisodeNumber, SeasonNumber
+
+
+def _ep(start: int, end: int | None = None, *, file: str | None = None) -> EpisodeRelease:
+    end_n = EpisodeNumber(end if end is not None else start)
+    label = file or f"S01E{start:02d}.mkv"
+    return EpisodeRelease(
+        episodes=EpisodeRange(EpisodeNumber(start), end_n),
+        file_path=FilePath(label),
+        tracks=TrackProfile(),
+    )
+
+
+# ---------------------------------------------------------------------------
+# SeasonReleaseBuilder
+# ---------------------------------------------------------------------------
+
+
+class TestSeasonReleaseBuilder:
+    def test_build_empty(self):
+        b = SeasonReleaseBuilder(1, folder="X", mode=ReleaseMode.PACK)
+        s = b.build()
+        assert s.season_number == SeasonNumber(1)
+        assert s.episodes == ()
+        assert s.mode == ReleaseMode.PACK
+
+    def test_int_normalized_to_vo(self):
+        b = SeasonReleaseBuilder(3, folder="X", mode=ReleaseMode.EPISODIC)
+        assert b.season_number == SeasonNumber(3)
+
+    def test_add_episode_returns_self(self):
+        b = SeasonReleaseBuilder(1, folder="X", mode=ReleaseMode.PACK)
+        assert b.add_episode(_ep(1)) is b
+
+    def test_episodes_sorted_by_start(self):
+        b = SeasonReleaseBuilder(1, folder="X", mode=ReleaseMode.PACK)
+        b.add_episode(_ep(3)).add_episode(_ep(1)).add_episode(_ep(2))
+        s = b.build()
+        starts = [ep.episodes.start.value for ep in s.episodes]
+        assert starts == [1, 2, 3]
+
+    def test_overlap_raises(self):
+        # E01-E03 + E02 -> E02 overlaps with the first range
+        b = SeasonReleaseBuilder(1, folder="X", mode=ReleaseMode.PACK)
+        b.add_episode(_ep(1, 3)).add_episode(_ep(2))
+        with pytest.raises(ValidationError):
+            b.build()
+
+    def test_adjacent_ranges_dont_overlap(self):
+        # E01 + E02-E04 + E05 — all touch but no overlap
+        b = SeasonReleaseBuilder(1, folder="X", mode=ReleaseMode.PACK)
+        b.add_episode(_ep(1)).add_episode(_ep(2, 4)).add_episode(_ep(5))
+        s = b.build()
+        assert s.episode_count() == 5
+
+    def test_set_folder(self):
+        b = SeasonReleaseBuilder(1, folder="X", mode=ReleaseMode.PACK)
+        b.set_folder("Y")
+        assert b.build().folder == "Y"
+
+    def test_set_mode(self):
+        b = SeasonReleaseBuilder(1, folder="X", mode=ReleaseMode.PACK)
+        b.set_mode(ReleaseMode.EPISODIC)
+        assert b.build().mode == ReleaseMode.EPISODIC
+
+    def test_from_existing_round_trip(self):
+        b = SeasonReleaseBuilder(1, folder="Show.S01", mode=ReleaseMode.PACK)
+        b.add_episode(_ep(1)).add_episode(_ep(2))
+        original = b.build()
+        b2 = SeasonReleaseBuilder.from_existing(original)
+        rebuilt = b2.build()
+        assert rebuilt == original
+
+    def test_from_existing_then_mutate(self):
+        b = SeasonReleaseBuilder(1, folder="X", mode=ReleaseMode.PACK)
+        b.add_episode(_ep(1))
+        original = b.build()
+        b2 = SeasonReleaseBuilder.from_existing(original).add_episode(_ep(2))
+        rebuilt = b2.build()
+        assert len(rebuilt.episodes) == 2
+
+
+# ---------------------------------------------------------------------------
+# SeriesReleaseBuilder
+# ---------------------------------------------------------------------------
+
+
+class TestSeriesReleaseBuilder:
+    def test_build_empty(self):
+        b = SeriesReleaseBuilder(tmdb_id=TmdbId(84958))
+        r = b.build()
+        assert r.tmdb_id == TmdbId(84958)
+        assert r.imdb_id is None
+        assert r.seasons == ()
+
+    def test_int_and_str_normalized(self):
+        b = SeriesReleaseBuilder(tmdb_id=84958, imdb_id="tt0804484")
+        r = b.build()
+        assert r.tmdb_id == TmdbId(84958)
+        assert r.imdb_id == ImdbId("tt0804484")
+
+    def test_season_builder_create_requires_folder_and_mode(self):
+        b = SeriesReleaseBuilder(tmdb_id=TmdbId(1))
+        with pytest.raises(ValidationError):
+            b.season_builder(1)
+        with pytest.raises(ValidationError):
+            b.season_builder(1, folder="X")
+        with pytest.raises(ValidationError):
+            b.season_builder(1, mode=ReleaseMode.PACK)
+
+    def test_season_builder_reuses_existing(self):
+        b = SeriesReleaseBuilder(tmdb_id=TmdbId(1))
+        sb1 = b.season_builder(1, folder="X", mode=ReleaseMode.PACK)
+        sb2 = b.season_builder(1)  # no folder/mode — reuse
+        assert sb1 is sb2
+
+    def test_season_builder_can_override_folder_and_mode(self):
+        b = SeriesReleaseBuilder(tmdb_id=TmdbId(1))
+        b.season_builder(1, folder="X", mode=ReleaseMode.PACK)
+        b.season_builder(1, folder="Y", mode=ReleaseMode.EPISODIC)
+        season = b.build().seasons[0]
+        assert season.folder == "Y"
+        assert season.mode == ReleaseMode.EPISODIC
+
+    def test_seasons_sorted_on_build(self):
+        b = SeriesReleaseBuilder(tmdb_id=TmdbId(1))
+        b.season_builder(2, folder="S02", mode=ReleaseMode.PACK)
+        b.season_builder(1, folder="S01", mode=ReleaseMode.PACK)
+        r = b.build()
+        nums = [s.season_number.value for s in r.seasons]
+        assert nums == [1, 2]
+
+    def test_add_season_replaces(self):
+        b = SeriesReleaseBuilder(tmdb_id=TmdbId(1))
+        b.season_builder(1, folder="OLD", mode=ReleaseMode.PACK)
+        # Build a SeasonRelease via its own builder and attach via add_season:
+        replacement = SeasonReleaseBuilder(
+            1, folder="NEW", mode=ReleaseMode.EPISODIC
+        ).build()
+        b.add_season(replacement)
+        season = b.build().seasons[0]
+        assert season.folder == "NEW"
+        assert season.mode == ReleaseMode.EPISODIC
+
+    def test_set_imdb_id_string_normalized(self):
+        b = SeriesReleaseBuilder(tmdb_id=TmdbId(1))
+        b.set_imdb_id("tt0804484")
+        assert b.build().imdb_id == ImdbId("tt0804484")
+
+    def test_set_imdb_id_none(self):
+        b = SeriesReleaseBuilder(tmdb_id=TmdbId(1), imdb_id="tt0804484")
+        b.set_imdb_id(None)
+        assert b.build().imdb_id is None
+
+    def test_from_existing_round_trip(self):
+        b = SeriesReleaseBuilder(tmdb_id=TmdbId(84958), imdb_id="tt0804484")
+        sb = b.season_builder(1, folder="S01", mode=ReleaseMode.PACK)
+        sb.add_episode(_ep(1)).add_episode(_ep(2))
+        original = b.build()
+        b2 = SeriesReleaseBuilder.from_existing(original)
+        rebuilt = b2.build()
+        assert rebuilt == original
+
+    def test_from_existing_then_mutate(self):
+        b = SeriesReleaseBuilder(tmdb_id=TmdbId(1))
+        sb = b.season_builder(1, folder="S01", mode=ReleaseMode.PACK)
+        sb.add_episode(_ep(1))
+        original = b.build()
+        b2 = SeriesReleaseBuilder.from_existing(original)
+        b2.season_builder(2, folder="S02", mode=ReleaseMode.PACK).add_episode(_ep(1))
+        rebuilt = b2.build()
+        assert len(rebuilt.seasons) == 2

tests/domain/releases/test_entities.py

@@ -0,0 +1,270 @@
+"""Tests for the releases domain entities."""
+
+import dataclasses
+
+import pytest
+
+from alfred.domain.releases.entities import (
+    EpisodeRelease,
+    MovieRelease,
+    SeasonRelease,
+    SeriesRelease,
+    TrackProfile,
+)
+from alfred.domain.releases.value_objects import EpisodeRange, ReleaseMode
+from alfred.domain.shared.exceptions import ValidationError
+from alfred.domain.shared.media import AudioTrack, SubtitleTrack
+from alfred.domain.shared.value_objects import FilePath, ImdbId, TmdbId
+from alfred.domain.tv_shows.value_objects import EpisodeNumber, SeasonNumber
+
+
+# ---------------------------------------------------------------------------
+# Helpers
+# ---------------------------------------------------------------------------
+
+
+def _ep(start: int, end: int | None = None, *, file: str = "x.mkv") -> EpisodeRelease:
+    end_n = EpisodeNumber(end if end is not None else start)
+    return EpisodeRelease(
+        episodes=EpisodeRange(EpisodeNumber(start), end_n),
+        file_path=FilePath(file),
+        tracks=TrackProfile(),
+    )
+
+
+# ---------------------------------------------------------------------------
+# TrackProfile
+# ---------------------------------------------------------------------------
+
+
+class TestTrackProfile:
+    def test_default_empty(self):
+        p = TrackProfile()
+        assert p.audio_tracks == ()
+        assert p.subtitle_tracks == ()
+
+    def test_with_tracks(self):
+        a = AudioTrack(0, "eac3", 6, "5.1", "eng")
+        s = SubtitleTrack(0, "subrip", "eng", False, False)
+        p = TrackProfile(audio_tracks=(a,), subtitle_tracks=(s,))
+        assert p.audio_tracks == (a,)
+        assert p.subtitle_tracks == (s,)
+
+    def test_frozen(self):
+        p = TrackProfile()
+        with pytest.raises(dataclasses.FrozenInstanceError):
+            p.audio_tracks = ()  # type: ignore[misc]
+
+
+# ---------------------------------------------------------------------------
+# EpisodeRelease
+# ---------------------------------------------------------------------------
+
+
+class TestEpisodeRelease:
+    def test_construction(self):
+        ep = _ep(1)
+        assert ep.episodes.start == EpisodeNumber(1)
+        assert ep.file_path == FilePath("x.mkv")
+
+    def test_frozen(self):
+        ep = _ep(1)
+        with pytest.raises(dataclasses.FrozenInstanceError):
+            ep.file_path = FilePath("y.mkv")  # type: ignore[misc]
+
+
+# ---------------------------------------------------------------------------
+# SeasonRelease
+# ---------------------------------------------------------------------------
+
+
+class TestSeasonReleaseValidation:
+    def test_construction_pack(self):
+        s = SeasonRelease(
+            season_number=SeasonNumber(1),
+            folder="Show.S01",
+            mode=ReleaseMode.PACK,
+            episodes=(_ep(1), _ep(2)),
+        )
+        assert s.season_number == SeasonNumber(1)
+        assert s.mode == ReleaseMode.PACK
+
+    def test_construction_episodic(self):
+        s = SeasonRelease(
+            season_number=SeasonNumber(2),
+            folder="Show.S02",
+            mode=ReleaseMode.EPISODIC,
+            episodes=(),
+        )
+        assert s.mode == ReleaseMode.EPISODIC
+
+    def test_season_number_must_be_vo(self):
+        with pytest.raises(ValidationError):
+            SeasonRelease(
+                season_number=1,  # type: ignore[arg-type]
+                folder="X",
+                mode=ReleaseMode.PACK,
+            )
+
+    def test_mode_must_be_enum(self):
+        with pytest.raises(ValidationError):
+            SeasonRelease(
+                season_number=SeasonNumber(1),
+                folder="X",
+                mode="pack",  # type: ignore[arg-type]
+            )
+
+    def test_folder_must_be_non_empty(self):
+        with pytest.raises(ValidationError):
+            SeasonRelease(
+                season_number=SeasonNumber(1),
+                folder="",
+                mode=ReleaseMode.PACK,
+            )
+
+
+class TestSeasonReleaseEpisodeCount:
+    def test_zero_with_no_episodes(self):
+        s = SeasonRelease(
+            season_number=SeasonNumber(1),
+            folder="X",
+            mode=ReleaseMode.EPISODIC,
+            episodes=(),
+        )
+        assert s.episode_count() == 0
+
+    def test_all_singles(self):
+        s = SeasonRelease(
+            season_number=SeasonNumber(1),
+            folder="X",
+            mode=ReleaseMode.PACK,
+            episodes=(_ep(1), _ep(2), _ep(3)),
+        )
+        assert s.episode_count() == 3
+
+    def test_with_multi_episode_files(self):
+        # E01 + E02-E04 + E05  ->  1 + 3 + 1 = 5
+        s = SeasonRelease(
+            season_number=SeasonNumber(1),
+            folder="X",
+            mode=ReleaseMode.PACK,
+            episodes=(_ep(1), _ep(2, 4), _ep(5)),
+        )
+        assert s.episode_count() == 5
+
+
+# ---------------------------------------------------------------------------
+# SeriesRelease
+# ---------------------------------------------------------------------------
+
+
+def _season(n: int, *eps_ranges: tuple[int, int]) -> SeasonRelease:
+    eps = tuple(_ep(s, e) for s, e in eps_ranges)
+    return SeasonRelease(
+        season_number=SeasonNumber(n),
+        folder=f"Show.S{n:02d}",
+        mode=ReleaseMode.PACK,
+        episodes=eps,
+    )
+
+
+class TestSeriesReleaseValidation:
+    def test_construction_minimal(self):
+        r = SeriesRelease(
+            tmdb_id=TmdbId(84958),
+            imdb_id=None,
+            seasons=(),
+        )
+        assert r.tmdb_id == TmdbId(84958)
+        assert r.imdb_id is None
+        assert r.seasons == ()
+
+    def test_construction_with_imdb(self):
+        r = SeriesRelease(
+            tmdb_id=TmdbId(84958),
+            imdb_id=ImdbId("tt0804484"),
+        )
+        assert r.imdb_id == ImdbId("tt0804484")
+
+    def test_tmdb_id_must_be_vo(self):
+        with pytest.raises(ValidationError):
+            SeriesRelease(tmdb_id=84958, imdb_id=None)  # type: ignore[arg-type]
+
+    def test_imdb_id_wrong_type_raises(self):
+        with pytest.raises(ValidationError):
+            SeriesRelease(
+                tmdb_id=TmdbId(84958),
+                imdb_id="tt0804484",  # type: ignore[arg-type]
+            )
+
+    def test_duplicate_season_raises(self):
+        with pytest.raises(ValidationError):
+            SeriesRelease(
+                tmdb_id=TmdbId(1),
+                imdb_id=None,
+                seasons=(_season(1, (1, 1)), _season(1, (2, 2))),
+            )
+
+
+class TestSeriesReleaseQueries:
+    def test_get_season_present(self):
+        r = SeriesRelease(
+            tmdb_id=TmdbId(1),
+            imdb_id=None,
+            seasons=(_season(1, (1, 1)), _season(2, (1, 1))),
+        )
+        s = r.get_season(SeasonNumber(2))
+        assert s is not None
+        assert s.season_number == SeasonNumber(2)
+
+    def test_get_season_absent(self):
+        r = SeriesRelease(
+            tmdb_id=TmdbId(1),
+            imdb_id=None,
+            seasons=(_season(1, (1, 1)),),
+        )
+        assert r.get_season(SeasonNumber(99)) is None
+
+
+# ---------------------------------------------------------------------------
+# MovieRelease
+# ---------------------------------------------------------------------------
+
+
+class TestMovieRelease:
+    def test_construction(self):
+        m = MovieRelease(
+            tmdb_id=TmdbId(27205),
+            imdb_id=ImdbId("tt1375666"),
+            folder="Inception.2010.1080p.BluRay.x264-GROUP",
+            file_path=FilePath("Inception.2010.1080p.BluRay.x264-GROUP.mkv"),
+        )
+        assert m.tmdb_id == TmdbId(27205)
+        assert m.imdb_id == ImdbId("tt1375666")
+
+    def test_optional_imdb(self):
+        m = MovieRelease(
+            tmdb_id=TmdbId(27205),
+            imdb_id=None,
+            folder="X",
+            file_path=FilePath("x.mkv"),
+        )
+        assert m.imdb_id is None
+
+    def test_tmdb_id_must_be_vo(self):
+        with pytest.raises(ValidationError):
+            MovieRelease(
+                tmdb_id=27205,  # type: ignore[arg-type]
+                imdb_id=None,
+                folder="X",
+                file_path=FilePath("x.mkv"),
+            )
+
+    def test_folder_must_be_non_empty(self):
+        with pytest.raises(ValidationError):
+            MovieRelease(
+                tmdb_id=TmdbId(27205),
+                imdb_id=None,
+                folder="",
+                file_path=FilePath("x.mkv"),
+            )

tests/domain/releases/test_value_objects.py

@@ -0,0 +1,106 @@
+"""Tests for the releases domain value objects: EpisodeRange, ReleaseMode."""
+
+import pytest
+
+from alfred.domain.releases.value_objects import EpisodeRange, ReleaseMode
+from alfred.domain.shared.exceptions import ValidationError
+from alfred.domain.tv_shows.value_objects import EpisodeNumber
+
+
+# ---------------------------------------------------------------------------
+# ReleaseMode
+# ---------------------------------------------------------------------------
+
+
+class TestReleaseMode:
+    def test_values(self):
+        assert ReleaseMode.PACK.value == "pack"
+        assert ReleaseMode.EPISODIC.value == "episodic"
+
+    def test_str_subclass(self):
+        # ReleaseMode is a (str, Enum) — string equality should work.
+        assert ReleaseMode.PACK == "pack"
+        assert ReleaseMode.EPISODIC == "episodic"
+
+
+# ---------------------------------------------------------------------------
+# EpisodeRange
+# ---------------------------------------------------------------------------
+
+
+class TestEpisodeRangeConstruction:
+    def test_single_episode(self):
+        r = EpisodeRange(EpisodeNumber(1), EpisodeNumber(1))
+        assert r.start == EpisodeNumber(1)
+        assert r.end == EpisodeNumber(1)
+
+    def test_multi_episode(self):
+        r = EpisodeRange(EpisodeNumber(2), EpisodeNumber(4))
+        assert r.start == EpisodeNumber(2)
+        assert r.end == EpisodeNumber(4)
+
+    def test_end_before_start_raises(self):
+        with pytest.raises(ValidationError):
+            EpisodeRange(EpisodeNumber(5), EpisodeNumber(3))
+
+    def test_start_must_be_episode_number(self):
+        with pytest.raises(ValidationError):
+            EpisodeRange(1, EpisodeNumber(2))  # type: ignore[arg-type]
+
+    def test_end_must_be_episode_number(self):
+        with pytest.raises(ValidationError):
+            EpisodeRange(EpisodeNumber(1), 2)  # type: ignore[arg-type]
+
+
+class TestEpisodeRangeOperations:
+    def test_count_single(self):
+        assert EpisodeRange(EpisodeNumber(1), EpisodeNumber(1)).count() == 1
+
+    def test_count_multi(self):
+        assert EpisodeRange(EpisodeNumber(1), EpisodeNumber(3)).count() == 3
+
+    def test_count_large(self):
+        assert EpisodeRange(EpisodeNumber(1), EpisodeNumber(10)).count() == 10
+
+    def test_numbers_single(self):
+        r = EpisodeRange(EpisodeNumber(2), EpisodeNumber(2))
+        assert r.numbers() == (EpisodeNumber(2),)
+
+    def test_numbers_multi(self):
+        r = EpisodeRange(EpisodeNumber(2), EpisodeNumber(4))
+        assert r.numbers() == (
+            EpisodeNumber(2),
+            EpisodeNumber(3),
+            EpisodeNumber(4),
+        )
+
+    def test_is_single_true(self):
+        assert EpisodeRange(EpisodeNumber(1), EpisodeNumber(1)).is_single()
+
+    def test_is_single_false(self):
+        assert not EpisodeRange(EpisodeNumber(1), EpisodeNumber(2)).is_single()
+
+    def test_str_single(self):
+        assert str(EpisodeRange(EpisodeNumber(2), EpisodeNumber(2))) == "E02"
+
+    def test_str_multi(self):
+        assert str(EpisodeRange(EpisodeNumber(2), EpisodeNumber(4))) == "E02-E04"
+
+    def test_repr(self):
+        r = EpisodeRange(EpisodeNumber(1), EpisodeNumber(3))
+        assert repr(r) == "EpisodeRange(1, 3)"
+
+    def test_equality(self):
+        a = EpisodeRange(EpisodeNumber(1), EpisodeNumber(3))
+        b = EpisodeRange(EpisodeNumber(1), EpisodeNumber(3))
+        c = EpisodeRange(EpisodeNumber(1), EpisodeNumber(2))
+        assert a == b
+        assert a != c
+
+    def test_hashable(self):
+        ranges = {
+            EpisodeRange(EpisodeNumber(1), EpisodeNumber(1)),
+            EpisodeRange(EpisodeNumber(1), EpisodeNumber(1)),
+            EpisodeRange(EpisodeNumber(2), EpisodeNumber(3)),
+        }
+        assert len(ranges) == 2

tests/domain/test_shared_value_objects.py

@@ -1,11 +1,11 @@
-"""Tests for shared domain value objects: ImdbId, FilePath, FileSize."""
+"""Tests for shared domain value objects: ImdbId, TmdbId, FilePath, FileSize."""
 
 from pathlib import Path
 
 import pytest
 
 from alfred.domain.shared.exceptions import ValidationError
-from alfred.domain.shared.value_objects import FilePath, FileSize, ImdbId
+from alfred.domain.shared.value_objects import FilePath, FileSize, ImdbId, TmdbId
 
 # ---------------------------------------------------------------------------
 # ImdbId
@@ -54,6 +54,53 @@ class TestImdbId:
         assert len(ids) == 2
 
 
+# ---------------------------------------------------------------------------
+# TmdbId
+# ---------------------------------------------------------------------------
+
+
+class TestTmdbId:
+    def test_valid_int(self):
+        tid = TmdbId(84958)
+        assert tid.value == 84958
+        assert str(tid) == "84958"
+        assert int(tid) == 84958
+
+    def test_zero_raises(self):
+        with pytest.raises(ValidationError):
+            TmdbId(0)
+
+    def test_negative_raises(self):
+        with pytest.raises(ValidationError):
+            TmdbId(-1)
+
+    def test_string_raises(self):
+        with pytest.raises(ValidationError):
+            TmdbId("84958")  # type: ignore[arg-type]
+
+    def test_float_raises(self):
+        with pytest.raises(ValidationError):
+            TmdbId(84958.0)  # type: ignore[arg-type]
+
+    def test_bool_raises(self):
+        # bool is a subclass of int — make sure we reject it explicitly.
+        with pytest.raises(ValidationError):
+            TmdbId(True)  # type: ignore[arg-type]
+        with pytest.raises(ValidationError):
+            TmdbId(False)  # type: ignore[arg-type]
+
+    def test_repr(self):
+        assert repr(TmdbId(84958)) == "TmdbId(84958)"
+
+    def test_equality(self):
+        assert TmdbId(84958) == TmdbId(84958)
+        assert TmdbId(84958) != TmdbId(12345)
+
+    def test_hashable(self):
+        ids = {TmdbId(84958), TmdbId(12345), TmdbId(84958)}
+        assert len(ids) == 2
+
+
 # ---------------------------------------------------------------------------
 # FilePath
 # ---------------------------------------------------------------------------