fix: Temporarily downgrade Claude to 3.5 Sonnet

Author: anth-volk

changelog_entry.yaml

@@ -0,0 +1,4 @@
+- bump: patch
+  changes:
+    changed:
+    - Temporarily downgraded Claude to 3.5 Sonnet.

policyengine_api/services/ai_analysis_service.py

@@ -52,8 +52,12 @@ def trigger_ai_analysis(self, prompt: str) -> Generator[str, None, None]:
         def generate():
             response_text = ""
 
+            # Temporarily downgrading Claude to 3.5 Sonnet to prevent unwanted
+            # quotes in Explain with AI feature responses.
+            # If Claude is still at 3.5 Sonnet on July 1, 2025, file an issue.
+            # See https://github.com/PolicyEngine/policyengine-app/issues/2584
             with claude_client.messages.stream(
-                model="claude-sonnet-4-20250514",
+                model="claude-3-5-sonnet-20240620",
                 max_tokens=1500,
                 temperature=0.0,
                 system="Respond with a historical quote",