Name what a command calls its database, and whether it exists

`tag_restore` reached into `HaikuRAGApp._display_path` and `_path`, and seven
places spelled out `self._is_local and not self._path.exists()`. `display_path`
and `database_missing` say both, and `database_missing` is False for a database
behind a URI, which has no path to check.

`init` keeps its own check: it asks the opposite question.

haiku_rag_slim/haiku/rag/app.py

@@ -101,10 +101,18 @@ class HaikuRAGApp:
         return self._connection[1]
 
     @property
-    def _display_path(self) -> "Path | str":
+    def display_path(self) -> "Path | str":
         """What a one-database command calls the database it opened."""
         return self._one.db_path or self._one.uri
 
+    @property
+    def database_missing(self) -> bool:
+        """Whether the one local database this command resolved to does not exist.
+
+        Always False for a database behind a URI, which has no path to check.
+        """
+        return self._is_local and not self._path.exists()
+
     async def init(self):
         """Initialize a new database."""
         if self._is_local and self._path.exists():
@@ -116,7 +124,7 @@ class HaikuRAGApp:
         async with HaikuRAG._covering(self.scope, self.config, create=True):
             pass
         self.console.print(
-            f"[bold green]Database initialized at {self._display_path}[/bold green]"
+            f"[bold green]Database initialized at {self.display_path}[/bold green]"
         )
 
     async def info(self):
@@ -127,10 +135,10 @@ class HaikuRAGApp:
         # Basic: show path/URI
         self.console.print("[bold]haiku.rag database info[/bold]")
         self.console.print(
-            f"  [repr.attrib_name]path[/repr.attrib_name]: {self._display_path}"
+            f"  [repr.attrib_name]path[/repr.attrib_name]: {self.display_path}"
         )
 
-        if self._is_local and not self._path.exists():
+        if self.database_missing:
             self.console.print("[red]Database path does not exist.[/red]")
             return
 
@@ -258,10 +266,10 @@ class HaikuRAGApp:
 
         self.console.print("[bold]haiku.rag doctor[/bold]")
         self.console.print(
-            f"  [repr.attrib_name]path[/repr.attrib_name]: {self._display_path}"
+            f"  [repr.attrib_name]path[/repr.attrib_name]: {self.display_path}"
         )
 
-        if self._is_local and not self._path.exists():
+        if self.database_missing:
             self.console.print("[red]Database path does not exist.[/red]")
             return True
 
@@ -329,7 +337,7 @@ class HaikuRAGApp:
         """
         from haiku.rag.store.engine import Store
 
-        if self._is_local and not self._path.exists():
+        if self.database_missing:
             self.console.print("[red]Database path does not exist.[/red]")
             return
 
@@ -425,7 +433,7 @@ class HaikuRAGApp:
 
     async def create_tag(self, name: str):
         """Tag the current version of every table."""
-        if self._is_local and not self._path.exists():
+        if self.database_missing:
             raise ValueError(f"Database path does not exist: {self._path}")
         async with self._tag_write_store() as store:
             await store.create_tag(name)
@@ -433,7 +441,7 @@ class HaikuRAGApp:
 
     async def list_tags(self):
         """List database tags, flagging partial ones."""
-        if self._is_local and not self._path.exists():
+        if self.database_missing:
             raise ValueError(f"Database path does not exist: {self._path}")
         async with self._tag_read_store() as store:
             tags = await store.list_tags()
@@ -454,7 +462,7 @@ class HaikuRAGApp:
 
     async def delete_tag(self, name: str):
         """Delete a tag from every table that has it."""
-        if self._is_local and not self._path.exists():
+        if self.database_missing:
             raise ValueError(f"Database path does not exist: {self._path}")
         async with self._tag_write_store() as store:
             await store.delete_tag(name)
@@ -469,7 +477,7 @@ class HaikuRAGApp:
         Raises:
             ValueError: If the database path does not exist.
         """
-        if self._is_local and not self._path.exists():
+        if self.database_missing:
             raise ValueError(f"Database path does not exist: {self._path}")
         async with self._tag_write_store() as store:
             safety_tag = await store.restore_tag(name)
@@ -886,7 +894,7 @@ class HaikuRAGApp:
             f"[repr.attrib_name]created at[/repr.attrib_name]: {doc.created_at} [repr.attrib_name]updated at[/repr.attrib_name]: {doc.updated_at}"
         )
         # `list` does not load content, which is where the docling blobs live, so
-        # the header would otherwise announce a field the command declined to fetch.
+        # the header prints only for a fetched field.
         if doc.content:
             self.console.print("[repr.attrib_name]content[/repr.attrib_name]:")
             self.console.print(content)
@@ -932,9 +940,9 @@ class HaikuRAGApp:
         The server opens its own client and validates it on startup, so nothing
         is opened here first.
         """
-        # The resolved scope, not a derived path and configuration: a path
-        # would override a configured URI, and deriving drops the name results
-        # and citations carry.
+        # The resolved scope: a path overrides a configured URI, and a derived
+        # single-database configuration drops the name results and citations
+        # carry.
         server = _mcp_server_covering(self.scope, self.config, self.read_only)
         try:
             if transport == "stdio":

haiku_rag_slim/haiku/rag/cli.py

@@ -756,11 +756,11 @@ def tag_restore(
     ),
 ):
     app = create_app(db)
-    if app._is_local and not app._path.exists():
-        typer.echo(f"Error: Database path does not exist: {app._path}", err=True)
+    if app.database_missing:
+        typer.echo(f"Error: Database path does not exist: {app.display_path}", err=True)
         raise typer.Exit(1)
     if not yes:
-        typer.echo(f"Database: {app._display_path}")
+        typer.echo(f"Database: {app.display_path}")
         typer.echo(f"Tag: {name}")
         typer.echo("This changes the live database state across all tables.")
         typer.echo("Stop all ingestion and other writers before continuing.")

tests/test_app.py

@@ -449,7 +449,7 @@ def test_remote_uri_is_the_display_path(tmp_path):
     config = AppConfig(lancedb=LanceDBConfig(uri="s3://bucket/path"))
     app = HaikuRAGApp(scope=for_path(None, config), config=config)
 
-    assert app._display_path == "s3://bucket/path"
+    assert app.display_path == "s3://bucket/path"
     assert app._is_local is False