feat(cli): provide default post-submit prompt for skill command (#25327)

packages/cli/src/services/SkillCommandLoader.test.ts

@@ -88,7 +88,7 @@ describe('SkillCommandLoader', () => {
       type: 'tool',
       toolName: ACTIVATE_SKILL_TOOL_NAME,
       toolArgs: { name: 'test-skill' },
-      postSubmitPrompt: undefined,
+      postSubmitPrompt: 'Use the skill test-skill',
     });
   });
 

packages/cli/src/services/SkillCommandLoader.ts

@@ -46,7 +46,10 @@ export class SkillCommandLoader implements ICommandLoader {
           type: 'tool',
           toolName: ACTIVATE_SKILL_TOOL_NAME,
           toolArgs: { name: skill.name },
-          postSubmitPrompt: args.trim().length > 0 ? args.trim() : undefined,
+          postSubmitPrompt:
+            args.trim().length > 0
+              ? args.trim()
+              : `Use the skill ${skill.name}`,
         }),
       };
     });