chore: rename coder -> primary

cmd/schema/README.md

@@ -46,7 +46,7 @@ Here's an example configuration that conforms to the schema:
     }
   },
   "agents": {
-    "coder": {
+    "primary": {
       "model": "claude-3.7-sonnet",
       "maxTokens": 5000,
       "reasoningEffort": "medium"
@@ -61,4 +61,5 @@ Here's an example configuration that conforms to the schema:
     }
   }
 }
-```
+```
+

cmd/schema/main.go

@@ -274,7 +274,7 @@ func generateSchema() map[string]any {
 	// Add specific agent properties
 	agentProperties := map[string]any{}
 	knownAgents := []string{
-		string(config.AgentCoder),
+		string(config.AgentPrimary),
 		string(config.AgentTask),
 		string(config.AgentTitle),
 	}