feat(FN-4394): complete Step 1 — add heartbeat scope discipline types and defaults

Fusion-Task-Id: FN-4394
Fusion-Task-Lineage: 1e7ad660-2cd2-40ba-b7b8-7ef552c6fa13

packages/core/src/__tests__/settings-parity.test.ts

@@ -89,6 +89,12 @@ describe("settings key parity", () => {
     expect(isGlobalSettingsKey("autoClaimCandidatesInPrompt")).toBe(false);
   });
 
+  it("keeps heartbeatScopeDiscipline project-scoped with strict default", () => {
+    expect(DEFAULT_PROJECT_SETTINGS.heartbeatScopeDiscipline).toBe("strict");
+    expect(isProjectSettingsKey("heartbeatScopeDiscipline")).toBe(true);
+    expect(isGlobalSettingsKey("heartbeatScopeDiscipline")).toBe(false);
+  });
+
   it("documents autoClaimCandidatesInPrompt expected integer range", () => {
     const inRange = [0, 1, 5, 10];
     const outOfRange = [-1, 11, 100];

packages/core/src/__tests__/settings-validation.test.ts

@@ -3,6 +3,7 @@ import {
   validateDirectMergeCommitStrategy,
   validateGithubAuthMode,
   validateGithubRepoSlug,
+  validateHeartbeatScopeDisciplineMode,
   validateUnavailableNodePolicy,
 } from "../settings-validation.js";
 
@@ -47,6 +48,20 @@ describe("settings-validation", () => {
     });
   });
 
+  describe("validateHeartbeatScopeDisciplineMode", () => {
+    it("accepts supported modes", () => {
+      expect(validateHeartbeatScopeDisciplineMode("strict")).toBe("strict");
+      expect(validateHeartbeatScopeDisciplineMode("lite")).toBe("lite");
+      expect(validateHeartbeatScopeDisciplineMode("off")).toBe("off");
+    });
+
+    it("returns undefined for invalid values", () => {
+      expect(validateHeartbeatScopeDisciplineMode("minimal")).toBeUndefined();
+      expect(validateHeartbeatScopeDisciplineMode(123)).toBeUndefined();
+      expect(validateHeartbeatScopeDisciplineMode(undefined)).toBeUndefined();
+    });
+  });
+
   describe("validateGithubRepoSlug", () => {
     it("accepts valid owner/repo slugs", () => {
       expect(validateGithubRepoSlug("owner/repo")).toBe("owner/repo");