default parameters for ollama_chat models (#689)

Signed-off-by: Mandana Vaziri <[email protected]>

Author: vazirim

examples/chatbot/chatbot.pdl

@@ -6,7 +6,7 @@ text:
 - repeat:
     text:
     # Send context to Granite model hosted at replicate.com
-    - model: ollama/granite-code:8b
+    - model: ollama_chat/granite3.2:8b
     # Allow the user to type 'yes', 'no', or anything else, storing
     # the input into a variable named `eval`.  The input is also implicitly
     # added to the context.

src/pdl/pdl_ast.py

@@ -902,6 +902,11 @@ def get_default_model_parameters() -> list[dict[str, Any]]:
                 "temperature": 0,
             },
         },
+        {
+            "ollama_chat/granite*": {
+                "temperature": 0,
+            },
+        },
     ]