diff --git a/src/haiku/rag/app.py b/src/haiku/rag/app.py
index 01311b86..9347d255 100644
--- a/src/haiku/rag/app.py
+++ b/src/haiku/rag/app.py
@@ -122,12 +122,7 @@ class HaikuRAGApp:
                         self.console.print(f"• {finding}")
                     self.console.print()
 
-                # Themes
-                if report.themes:
-                    self.console.print("[bold cyan]Key Themes:[/bold cyan]")
-                    for theme, explanation in report.themes.items():
-                        self.console.print(f"• [bold]{theme}[/bold]: {explanation}")
-                    self.console.print()
+                # (Themes section removed)
 
                 # Conclusions
                 if report.conclusions:
@@ -261,7 +256,7 @@ class HaikuRAGApp:
                 elif transport == "sse":
                     await server.run_sse_async()
                 else:
-                    await server.run_http_async("streamable-http")
+                    await server.run_http_async(transport="streamable-http")
             except KeyboardInterrupt:
                 pass
             finally:
diff --git a/src/haiku/rag/qa/agent.py b/src/haiku/rag/qa/agent.py
index b7edb6fa..3493b0ce 100644
--- a/src/haiku/rag/qa/agent.py
+++ b/src/haiku/rag/qa/agent.py
@@ -49,6 +49,9 @@ class QuestionAnswerAgent:
             limit: int = 3,
         ) -> list[SearchResult]:
             """Search the knowledge base for relevant documents."""
+
+            # Remove quotes from queries as this requires positional indexing in lancedb
+            query = query.replace('"', "")
             search_results = await ctx.deps.client.search(query, limit=limit)
             expanded_results = await ctx.deps.client.expand_context(search_results)
 
diff --git a/src/haiku/rag/research/evaluation_agent.py b/src/haiku/rag/research/evaluation_agent.py
index 5b924c81..8d3f5541 100644
--- a/src/haiku/rag/research/evaluation_agent.py
+++ b/src/haiku/rag/research/evaluation_agent.py
@@ -11,7 +11,9 @@ class EvaluationResult(BaseModel):
         description="Main insights extracted from the research so far"
     )
     new_questions: list[str] = Field(
-        description="New sub-questions to add to the research (max 3)", max_length=3
+        description="New sub-questions to add to the research (max 3)",
+        max_length=3,
+        default=[],
     )
     confidence_score: float = Field(
         description="Confidence level in the completeness of research (0-1)",
diff --git a/src/haiku/rag/research/search_agent.py b/src/haiku/rag/research/search_agent.py
index 200f619a..b2cdc17f 100644
--- a/src/haiku/rag/research/search_agent.py
+++ b/src/haiku/rag/research/search_agent.py
@@ -42,6 +42,7 @@ class SearchSpecialistAgent(BaseResearchAgent[SearchAnswer]):
         ) -> str:
             """Search the KB and return a concise context pack."""
             # Remove quotes from queries as this requires positional indexing in lancedb
+            # XXX: Investigate how to do that with lancedb
             query = query.replace('"', "")
             search_results = await ctx.deps.client.search(query, limit=limit)
             expanded = await ctx.deps.client.expand_context(search_results)
diff --git a/src/haiku/rag/research/synthesis_agent.py b/src/haiku/rag/research/synthesis_agent.py
index 45349789..e0dbd0a3 100644
--- a/src/haiku/rag/research/synthesis_agent.py
+++ b/src/haiku/rag/research/synthesis_agent.py
@@ -12,11 +12,12 @@ class ResearchReport(BaseModel):
     main_findings: list[str] = Field(
         description="Primary research findings with supporting evidence"
     )
-    themes: dict[str, str] = Field(description="Major themes and their explanations")
     conclusions: list[str] = Field(description="Evidence-based conclusions")
-    limitations: list[str] = Field(description="Limitations of the current research")
+    limitations: list[str] = Field(
+        description="Limitations of the current research", default=[]
+    )
     recommendations: list[str] = Field(
-        description="Actionable recommendations based on findings"
+        description="Actionable recommendations based on findings", default=[]
     )
     sources_summary: str = Field(
         description="Summary of sources used and their reliability"
diff --git a/tests/research/test_orchestrator.py b/tests/research/test_orchestrator.py
index 09d44c6e..3c298c82 100644
--- a/tests/research/test_orchestrator.py
+++ b/tests/research/test_orchestrator.py
@@ -172,7 +172,6 @@ class TestResearchOrchestrator:
                         assert report.title
                         assert report.executive_summary
                         assert isinstance(report.main_findings, list)
-                        assert isinstance(report.themes, dict)
                         assert isinstance(report.conclusions, list)
                         assert isinstance(report.limitations, list)
                         assert isinstance(report.recommendations, list)