Consolidate tag primitives

haiku_rag_slim/haiku/rag/app.py

@@ -337,20 +337,16 @@ class HaikuRAGApp:  # pragma: no cover
                     )
 
     def _tag_write_store(self) -> "Store":
-        """Writable store for tag create/delete.
+        """Writable store for tag create/delete with normal validation and
+        migration checks.
 
-        Migration checks stay on: a coordinated tag is only reliable when the
-        database schema is current, and a writable open of a legacy database
-        would create missing tables as a side effect.
+        A coordinated tag is only reliable when the database schema is
+        current, and a writable open of a legacy database would create
+        missing tables as a side effect.
         """
         from haiku.rag.store.engine import Store
 
-        return Store(
-            self.db_path,
-            config=self.config,
-            skip_validation=True,
-            read_only=self.read_only,
-        )
+        return Store(self.db_path, config=self.config, read_only=self.read_only)
 
     def _tag_read_store(self) -> "Store":
         """Read-only store for tag inspection; works on old or drifted DBs."""

haiku_rag_slim/haiku/rag/store/engine.py

@@ -1,5 +1,4 @@
 import asyncio
-import contextlib
 import json
 import logging
 from dataclasses import dataclass
@@ -882,7 +881,7 @@ class Store:
         self._assert_not_rebuilding()
         tables = self._tables()
 
-        async with self._write_lock:
+        async with self._rebuild_lock, self._write_lock:
             existing = [
                 table_name
                 for table_name, table in tables.items()
@@ -902,10 +901,19 @@ class Store:
                 for table_name, table in tables.items():
                     await table.tags.create(name, versions[table_name])
                     created.append(table_name)
-            except Exception:
+            except Exception as exc:
+                failed_cleanup: list[str] = []
                 for table_name in created:
-                    with contextlib.suppress(Exception):
+                    try:
                         await tables[table_name].tags.delete(name)
+                    except Exception:
+                        failed_cleanup.append(table_name)
+                if failed_cleanup:
+                    raise RuntimeError(
+                        f"Tag '{name}' creation failed ({exc}) and cleanup "
+                        f"failed on: {', '.join(failed_cleanup)}. A partial "
+                        "tag may remain; delete it with delete_tag."
+                    ) from exc
                 raise
 
     async def list_tags(self) -> dict[str, TagInfo]:
@@ -933,17 +941,28 @@ class Store:
         Raises:
             ReadOnlyError: If the store is in read-only mode.
             ValueError: If a rebuild is in progress or no table has the tag.
+            RuntimeError: If deletion failed on some tables; remnants remain
+                until a retry succeeds.
         """
         self._assert_writable()
         self._assert_not_rebuilding()
-        async with self._write_lock:
+        async with self._rebuild_lock, self._write_lock:
             found = False
-            for table in self._tables().values():
+            failed: list[str] = []
+            for table_name, table in self._tables().items():
                 if name in await table.tags.list():
-                    await table.tags.delete(name)
                     found = True
+                    try:
+                        await table.tags.delete(name)
+                    except Exception:
+                        failed.append(table_name)
             if not found:
                 raise ValueError(f"Tag '{name}' does not exist")
+            if failed:
+                raise RuntimeError(
+                    f"Tag '{name}' deletion failed on: {', '.join(failed)}. "
+                    "Remnants remain; retry delete_tag."
+                )
 
     async def list_table_versions(self, table_name: str) -> list[dict[str, Any]]:
         """List version history for a table.

tests/store/test_tags.py

@@ -85,6 +85,70 @@ async def test_create_tag_rolls_back_own_tags_on_failure(temp_db_path, monkeypat
         assert tags["keep"].complete is True
 
 
+@pytest.mark.asyncio
+async def test_create_tag_reports_failed_cleanup(temp_db_path, monkeypatch):
+    """When midway-failure cleanup also fails, the error reports both the
+    original failure and the remaining partial-tag risk."""
+    async with Store(temp_db_path, create=True) as store:
+        real_create = AsyncTags.create
+        calls = {"n": 0}
+
+        async def flaky_create(self, name: str, version: int) -> None:
+            calls["n"] += 1
+            if calls["n"] == 4:
+                raise RuntimeError("create boom")
+            await real_create(self, name, version)
+
+        async def failing_delete(self, name: str) -> None:
+            raise RuntimeError("delete boom")
+
+        monkeypatch.setattr(AsyncTags, "create", flaky_create)
+        monkeypatch.setattr(AsyncTags, "delete", failing_delete)
+
+        with pytest.raises(RuntimeError) as exc_info:
+            await store.create_tag("broken")
+
+        msg = str(exc_info.value)
+        assert "create boom" in msg
+        assert "partial" in msg
+        assert exc_info.value.__cause__ is not None
+
+        monkeypatch.undo()
+        tags = await store.list_tags()
+        assert tags["broken"].complete is False
+
+
+@pytest.mark.asyncio
+async def test_delete_tag_reports_failed_tables(temp_db_path, monkeypatch):
+    """delete_tag never claims success when remnants remain: it names the
+    tables where deletion failed."""
+    async with Store(temp_db_path, create=True) as store:
+        await store.create_tag("release-1")
+
+        real_delete = AsyncTags.delete
+        calls = {"n": 0}
+
+        async def flaky_delete(self, name: str) -> None:
+            calls["n"] += 1
+            if calls["n"] == 2:
+                raise RuntimeError("delete boom")
+            await real_delete(self, name)
+
+        monkeypatch.setattr(AsyncTags, "delete", flaky_delete)
+
+        with pytest.raises(RuntimeError) as exc_info:
+            await store.delete_tag("release-1")
+
+        assert "document_meta" in str(exc_info.value)
+
+        monkeypatch.undo()
+        tags = await store.list_tags()
+        assert set(tags["release-1"].tables) == {"document_meta"}
+
+        await store.delete_tag("release-1")
+        assert await store.list_tags() == {}
+
+
 @pytest.mark.asyncio
 async def test_create_tag_waits_for_write_lock(temp_db_path):
     """create_tag serializes with client writes so a write cannot land