feat(core,cli,server,web): add goal mode — loop Tasks on one Session until an objective completes (#66)

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

packages/core/test/session-title.test.ts

@@ -8,7 +8,6 @@ import {
   emptyTokenCounts,
   sanitizeTitle,
   Session,
-  stripConversationMarkers,
   thinkingMessage,
   tokenUsage,
   userText,
@@ -125,41 +124,6 @@ describe("session-title", () => {
     );
   });
 
-  it("stripConversationMarkers: removes machine marker blocks, keeps the human body", () => {
-    // The skill-invocation block that wraps a first user message must not reach the title.
-    expect(
-      stripConversationMarkers(
-        "[use_skills]\nskills: penguin-sdk, web-design\n[/use_skills]\n做一个 RAG 应用",
-      ),
-    ).toBe("做一个 RAG 应用");
-    // Handoff and scheduled-task markers are stripped too; ordinary bracketed text stays.
-    expect(stripConversationMarkers("[handoff_from]data_analyst[/handoff_from]继续分析")).toBe(
-      "继续分析",
-    );
-    // The /model switch origin block (the new session's first message) must not leak into the title either.
-    expect(
-      stripConversationMarkers(
-        "[model_switch_from]\nsession: session-01\ntrace: /t/x_001.jsonl\n[/model_switch_from]\n继续这个任务",
-      ),
-    ).toBe("继续这个任务");
-    expect(stripConversationMarkers("render a <div> element")).toBe("render a <div> element");
-    expect(stripConversationMarkers("check the [config] section")).toBe(
-      "check the [config] section",
-    );
-  });
-
-  it("stripConversationMarkers: the old angle-bracket marker form is still stripped (material from old Traces)", () => {
-    expect(
-      stripConversationMarkers("<use_skills>\nskills: web-design\n</use_skills>\n做一个落地页"),
-    ).toBe("做一个落地页");
-    expect(stripConversationMarkers("<handoff_from>data_analyst</handoff_from>继续分析")).toBe(
-      "继续分析",
-    );
-    expect(
-      stripConversationMarkers("<model_switch_from>session: s1</model_switch_from>继续这个任务"),
-    ).toBe("继续这个任务");
-  });
-
   it("Session.generateTitle: sends via createBareLLM; returns null when no factory is provided", async () => {
     const withFactory = new Session({
       meta: META,