diff --git a/custom_components/bahmcloud_store/update.py b/custom_components/bahmcloud_store/update.py
index 1c07482..efbff00 100644
--- a/custom_components/bahmcloud_store/update.py
+++ b/custom_components/bahmcloud_store/update.py
@@ -1,11 +1,146 @@
 from __future__ import annotations
 
-# NOTE:
-# Update entities will be implemented once installation/provider resolution is in place.
-# This stub prevents platform load errors and keeps the integration stable in 0.3.0.
+import logging
+from dataclasses import dataclass
+from typing import Any
 
-from homeassistant.core import HomeAssistant
+from homeassistant.components.update import UpdateEntity, UpdateEntityFeature
+from homeassistant.core import HomeAssistant, callback
+from homeassistant.helpers.dispatcher import async_dispatcher_connect
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.entity import EntityCategory
+
+from .core import DOMAIN, SIGNAL_UPDATED, BCSCore
+
+_LOGGER = logging.getLogger(__name__)
+
+
+def _pretty_repo_name(core: BCSCore, repo_id: str) -> str:
+    """Return a human-friendly name for a repo update entity."""
+    try:
+        repo = core.get_repo(repo_id)
+        if repo and getattr(repo, "name", None):
+            name = str(repo.name).strip()
+            if name:
+                return name
+    except Exception:
+        pass
+
+    # Fallbacks
+    if repo_id.startswith("index:"):
+        return f"BCS Index {repo_id.split(':', 1)[1]}"
+    if repo_id.startswith("custom:"):
+        return f"BCS Custom {repo_id.split(':', 1)[1]}"
+    return f"BCS {repo_id}"
+
+
+@dataclass(frozen=True)
+class _RepoKey:
+    repo_id: str
+
+
+class BCSRepoUpdateEntity(UpdateEntity):
+    """Update entity representing a BCS-managed repository."""
+
+    _attr_entity_category = EntityCategory.DIAGNOSTIC
+    _attr_supported_features = UpdateEntityFeature.INSTALL
+
+    def __init__(self, core: BCSCore, repo_id: str) -> None:
+        self._core = core
+        self._repo_id = repo_id
+        self._in_progress = False
+
+        # Stable unique id (do NOT change)
+        self._attr_unique_id = f"{DOMAIN}:{repo_id}"
+
+        # Human-friendly name in UI
+        pretty = _pretty_repo_name(core, repo_id)
+        self._attr_name = pretty
+
+        # Title shown in the entity dialog
+        self._attr_title = pretty
+
+    @property
+    def available(self) -> bool:
+        repo = self._core.get_repo(self._repo_id)
+        installed = self._core.get_installed(self._repo_id)
+        return repo is not None and installed is not None
+
+    @property
+    def in_progress(self) -> bool | None:
+        return self._in_progress
+
+    @property
+    def installed_version(self) -> str | None:
+        installed = self._core.get_installed(self._repo_id) or {}
+        v = installed.get("installed_version") or installed.get("ref")
+        return str(v) if v else None
+
+    @property
+    def latest_version(self) -> str | None:
+        repo = self._core.get_repo(self._repo_id)
+        if not repo:
+            return None
+        v = getattr(repo, "latest_version", None)
+        return str(v) if v else None
+
+    @property
+    def update_available(self) -> bool:
+        latest = self.latest_version
+        installed = self.installed_version
+        if not latest or not installed:
+            return False
+        return latest != installed
+
+    def version_is_newer(self, latest_version: str, installed_version: str) -> bool:
+        return latest_version != installed_version
+
+    @property
+    def release_url(self) -> str | None:
+        repo = self._core.get_repo(self._repo_id)
+        return getattr(repo, "url", None) if repo else None
+
+    async def async_install(self, version: str | None, backup: bool, **kwargs: Any) -> None:
+        if version is not None:
+            _LOGGER.debug(
+                "BCS update entity requested specific version=%s (ignored)", version
+            )
+
+        self._in_progress = True
+        self.async_write_ha_state()
+
+        try:
+            await self._core.update_repo(self._repo_id)
+        finally:
+            self._in_progress = False
+            self.async_write_ha_state()
+
+
+@callback
+def _sync_entities(
+    core: BCSCore,
+    existing: dict[str, BCSRepoUpdateEntity],
+    async_add_entities: AddEntitiesCallback,
+) -> None:
+    """Ensure there is one update entity per installed repo."""
+    installed_map = getattr(core, "_installed_cache", {}) or {}
+    new_entities: list[BCSRepoUpdateEntity] = []
+
+    for repo_id, data in installed_map.items():
+        if not isinstance(data, dict):
+            continue
+        if repo_id in existing:
+            continue
+
+        ent = BCSRepoUpdateEntity(core, repo_id)
+        existing[repo_id] = ent
+        new_entities.append(ent)
+
+    if new_entities:
+        async_add_entities(new_entities)
+
+    for ent in existing.values():
+        ent.async_write_ha_state()
 
 
 async def async_setup_platform(
@@ -14,4 +149,18 @@ async def async_setup_platform(
     async_add_entities: AddEntitiesCallback,
     discovery_info=None,
 ):
-    return
+    """Set up BCS update entities."""
+    core: BCSCore | None = hass.data.get(DOMAIN)
+    if not core:
+        _LOGGER.debug("BCS core not available, skipping update platform setup")
+        return
+
+    entities: dict[str, BCSRepoUpdateEntity] = {}
+
+    _sync_entities(core, entities, async_add_entities)
+
+    @callback
+    def _handle_update() -> None:
+        _sync_entities(core, entities, async_add_entities)
+
+    async_dispatcher_connect(hass, SIGNAL_UPDATED, _handle_update)
\ No newline at end of file