MTP tools & Centralizing

src/task.rs

@@ -209,6 +209,10 @@ pub struct AgentTaskSpec {
     pub connector_config: Option<ConnectorConfig>,
     #[serde(default)]
     pub tools_json: Option<String>,
+    /* Overrides the agent-type default system prompt when set. Takes highest
+       precedence in the resolution chain (above DB overrides and defaults). */
+    #[serde(default)]
+    pub system_prompt: Option<String>,
 }
 
 impl AgentTaskSpec {
@@ -239,6 +243,7 @@ impl AgentTaskSpec {
             project_id: None,
             connector_config: None,
             tools_json: None,
+            system_prompt: None,
         }
     }
 }