Remove defensive app() try/except, let errors propagate if they occur

haiku_rag_slim/haiku/rag/app.py

@@ -78,12 +78,8 @@ class HaikuRAGApp:
             return
 
         # Connect without going through Store to avoid upgrades/validation writes
-        try:
         db = lancedb.connect(self.db_path)
         table_names = set(db.table_names())
-        except Exception as e:
-            self.console.print(f"[red]Failed to open database: {e}[/red]")
-            return
 
         versions = get_package_versions()
 
@@ -418,7 +414,6 @@ class HaikuRAGApp:
             read_only=self.read_only,
             before=self.before,
         ) as self.client:
-            try:
             citations = []
             if deep:
                 graph = build_research_graph(config=self.config)
@@ -460,8 +455,6 @@ class HaikuRAGApp:
                 if cite and citations:
                     for renderable in format_citations_rich(citations):
                         self.console.print(renderable)
-            except Exception as e:
-                self.console.print(f"[red]Error: {e}[/red]")
 
     async def research(self, question: str, filter: str | None = None):
         """Run research via the pydantic-graph pipeline.
@@ -476,7 +469,6 @@ class HaikuRAGApp:
             read_only=self.read_only,
             before=self.before,
         ) as client:
-            try:
             self.console.print("[bold cyan]Starting research[/bold cyan]")
             self.console.print(f"[bold blue]Question:[/bold blue] {question}")
             self.console.print()
@@ -545,9 +537,6 @@ class HaikuRAGApp:
                 self.console.print("[bold cyan]Sources:[/bold cyan]")
                 self.console.print(report.sources_summary)
 
-            except Exception as e:
-                self.console.print(f"[red]Error during research: {e}[/red]")
-
     async def rebuild(self, mode: RebuildMode = RebuildMode.FULL):
         async with HaikuRAG(
             db_path=self.db_path,
@@ -556,14 +545,11 @@ class HaikuRAGApp:
             read_only=self.read_only,
             before=self.before,
         ) as client:
-            try:
             documents = await client.list_documents()
             total_docs = len(documents)
 
             if total_docs == 0:
-                    self.console.print(
-                        "[yellow]No documents found in database.[/yellow]"
-                    )
+                self.console.print("[yellow]No documents found in database.[/yellow]")
                 return
 
             mode_desc = {
@@ -583,12 +569,9 @@ class HaikuRAGApp:
             self.console.print(
                 "[bold green]Database rebuild completed successfully.[/bold green]"
             )
-            except Exception as e:
-                self.console.print(f"[red]Error rebuilding database: {e}[/red]")
 
     async def vacuum(self):
         """Run database maintenance: optimize and cleanup table history."""
-        try:
         async with HaikuRAG(
             db_path=self.db_path,
             config=self.config,
@@ -597,15 +580,10 @@ class HaikuRAGApp:
             before=self.before,
         ) as client:
             await client.vacuum()
-            self.console.print(
-                "[bold green]Vacuum completed successfully.[/bold green]"
-            )
-        except Exception as e:
-            self.console.print(f"[red]Error during vacuum: {e}[/red]")
+        self.console.print("[bold green]Vacuum completed successfully.[/bold green]")
 
     async def create_index(self):
         """Create vector index on the chunks table."""
-        try:
         async with HaikuRAG(
             db_path=self.db_path,
             config=self.config,
@@ -637,8 +615,6 @@ class HaikuRAGApp:
             self.console.print(
                 "[bold green]Vector index created successfully.[/bold green]"
             )
-        except Exception as e:
-            self.console.print(f"[red]Error creating index: {e}[/red]")
 
     async def download_models(self):
         """Download Docling, HuggingFace tokenizer, and Ollama models per config."""

haiku_rag_slim/haiku/rag/chat/__init__.py

@@ -16,7 +16,7 @@ def run_chat(
     """
     try:
         from haiku.rag.chat.app import ChatApp
-    except ImportError as e:
+    except ImportError as e:  # pragma: no cover
         raise ImportError(
             "textual is not installed. Please install it with `pip install 'haiku.rag-slim[tui]'` or use the full haiku.rag package."
         ) from e