feat: change copilot defaults to --interactive and --silent

Update built-in defaults for copilot command to use --interactive flag
(instead of --prompt) and add --silent flag for cleaner output.

Author: johnlindquist

src/config.test.ts

@@ -22,13 +22,13 @@ describe("config", () => {
     const config = await loadGlobalConfig();
     expect(config.commands).toBeDefined();
     expect(config.commands?.copilot).toBeDefined();
-    expect(config.commands?.copilot.$1).toBe("prompt");
+    expect(config.commands?.copilot.$1).toBe("interactive");
   });
 
   test("getCommandDefaults returns defaults for copilot", async () => {
     const defaults = await getCommandDefaults("copilot");
     expect(defaults).toBeDefined();
-    expect(defaults?.$1).toBe("prompt");
+    expect(defaults?.$1).toBe("interactive");
   });
 
   test("getCommandDefaults returns undefined for unknown command", async () => {
@@ -184,7 +184,7 @@ describe("loadFullConfig", () => {
 
   test("includes built-in defaults when no project config", async () => {
     const config = await loadFullConfig(testDir);
-    expect(config.commands?.copilot?.$1).toBe("prompt");
+    expect(config.commands?.copilot?.$1).toBe("interactive");
   });
 
   test("project config overrides global config", async () => {
@@ -212,7 +212,7 @@ describe("loadFullConfig", () => {
 
     const config = await loadFullConfig(testDir);
     // Built-in defaults preserved
-    expect(config.commands?.copilot?.$1).toBe("prompt");
+    expect(config.commands?.copilot?.$1).toBe("interactive");
     // New command added
     expect(config.commands?.["my-tool"]?.$1).toBe("body");
     expect(config.commands?.["my-tool"]?.verbose).toBe(true);
@@ -229,7 +229,7 @@ describe("loadFullConfig", () => {
 
     const config = await loadFullConfig(testDir);
     // Built-in default preserved
-    expect(config.commands?.copilot?.$1).toBe("prompt");
+    expect(config.commands?.copilot?.$1).toBe("interactive");
     // New setting added
     expect(config.commands?.copilot?.verbose).toBe(true);
   });

src/config.ts

@@ -29,7 +29,8 @@ const PROJECT_CONFIG_NAMES = ["ma.config.yaml", ".markdown-agent.yaml", ".markdo
 export const BUILTIN_DEFAULTS: GlobalConfig = {
   commands: {
     copilot: {
-      $1: "prompt",  // Map body to --prompt for copilot
+      $1: "interactive",  // Map body to --interactive for copilot
+      silent: true,       // Output only the agent response (no stats)
     },
   },
 };

src/context.test.ts

@@ -311,7 +311,7 @@ After import`;
 
     expect(config.commands?.claude?.model).toBe("project-model");
     // Built-in default for copilot should still be there
-    expect(config.commands?.copilot?.$1).toBe("prompt");
+    expect(config.commands?.copilot?.$1).toBe("interactive");
   });
 
   it("getCommandDefaultsFromConfig is pure function", () => {