fix: declare 'SearchType' for 'search_type' arg

fix: allow 'search_type' only for text searches

haiku_rag_slim/haiku/rag/app.py

@@ -19,6 +19,7 @@ from rich.progress import (
 from rich.syntax import Syntax
 
 from haiku.rag.client import HaikuRAG, RebuildMode
+from haiku.rag.client.models import SearchType
 from haiku.rag.config import AppConfig, Config
 from haiku.rag.mcp import create_mcp_server
 from haiku.rag.monitor import FileWatcher, S3Watcher
@@ -361,7 +362,7 @@ class HaikuRAGApp:  # pragma: no cover
         query: str | None = None,
         limit: int | None = None,
         filter: str | None = None,
-        search_type: str = "hybrid",
+        search_type: SearchType | None = None,
         image: Path | None = None,
     ):
         if query is None and image is None:
@@ -373,6 +374,10 @@ class HaikuRAGApp:  # pragma: no cover
             self.console.print("[red]Pass either a query or --image, not both.[/red]")
             return
 
+        if query is None and search_type is not None:
+            self.console.print("[red]Pass --search-type only for text queries[/red]")
+            return
+
         search_input: str | bytes
         if image is not None:
             search_input = image.read_bytes()
@@ -387,7 +392,10 @@ class HaikuRAGApp:  # pragma: no cover
             before=self.before,
         ) as self.client:
             results = await self.client.search(
-                search_input, limit=limit, filter=filter, search_type=search_type,
+                search_input,
+                limit=limit,
+                filter=filter,
+                search_type=search_type,
             )
             if not results:
                 self.console.print("[yellow]No results found.[/yellow]")

haiku_rag_slim/haiku/rag/cli.py

@@ -15,6 +15,7 @@ from dotenv import find_dotenv, load_dotenv
 load_dotenv(find_dotenv(usecwd=True))
 
 from haiku.rag.app import HaikuRAGApp  # noqa: E402
+from haiku.rag.client.models import SearchType  # noqa: E402
 from haiku.rag.config import (  # noqa: E402
     AppConfig,
     find_config_file,
@@ -314,11 +315,11 @@ def search(  # pragma: no cover
         "-f",
         help="SQL WHERE clause to filter documents (e.g., \"uri LIKE '%arxiv%'\")",
     ),
-    search_type: str | None = typer.Option(
-        None,
+    search_type: SearchType = typer.Option(
+        "hybrid",
         "--search-type",
         "-s",
-        help="Type of search: one of 'hybrid' (default) / 'fts' / 'vector' ",
+        help="Type of search to perform (text searches only)",
     ),
     image: Path | None = typer.Option(
         None,
@@ -334,7 +335,11 @@ def search(  # pragma: no cover
     app = create_app(db)
     asyncio.run(
         app.search(
-            query=query, limit=limit, filter=filter, search_type=search_type, image=image,
+            query=query,
+            limit=limit,
+            filter=filter,
+            search_type=search_type,
+            image=image,
         )
     )
 

haiku_rag_slim/haiku/rag/client/__init__.py

@@ -13,6 +13,7 @@ from urllib.parse import urlparse
 
 import httpx
 
+from haiku.rag.client.models import SearchType
 from haiku.rag.config import AppConfig, Config
 from haiku.rag.converters import get_converter
 from haiku.rag.reranking import get_reranker
@@ -349,7 +350,7 @@ class HaikuRAG:
         self,
         query: "str | bytes | PILImage.Image",
         limit: int | None = None,
-        search_type: str = "hybrid",
+        search_type: SearchType | None = None,
         filter: str | None = None,
         include_images: bool = True,
     ) -> list[SearchResult]:

haiku_rag_slim/haiku/rag/client/models.py

@@ -0,0 +1,3 @@
+from typing import Literal
+
+SearchType = Literal["vector", "fts", "hybrid"]

haiku_rag_slim/haiku/rag/client/search.py

@@ -1,6 +1,7 @@
 import base64
 from typing import TYPE_CHECKING
 
+from haiku.rag.client.models import SearchType
 from haiku.rag.reranking import get_reranker
 from haiku.rag.store.models.chunk import Chunk, SearchResult
 
@@ -14,7 +15,7 @@ async def search(
     client: "HaikuRAG",
     query: "str | bytes | PILImage.Image",
     limit: int | None = None,
-    search_type: str = "hybrid",
+    search_type: SearchType = "hybrid",
     filter: str | None = None,
     include_images: bool = True,
 ) -> list[SearchResult]: