diff --git a/src/features/rules/rulesync-rule.test.ts b/src/features/rules/rulesync-rule.test.ts
index c4fb88ddc..990398ea3 100644
--- a/src/features/rules/rulesync-rule.test.ts
+++ b/src/features/rules/rulesync-rule.test.ts
@@ -401,6 +401,94 @@ Subproject-specific rule body`;
       expect(rule.getBody()).toBe("Subproject-specific rule body");
     });
 
+    it("should handle copilot configuration in frontmatter", async () => {
+      const rulesDir = join(testDir, RULESYNC_RULES_RELATIVE_DIR_PATH);
+      await ensureDir(rulesDir);
+
+      const ruleContent = `---
+root: false
+targets:
+  - copilot
+description: Copilot rule
+copilot:
+  excludeAgent: "code-review"
+---
+
+Copilot-specific rule body`;
+
+      const filePath = join(rulesDir, "copilot-rule.md");
+      await writeFileContent(filePath, ruleContent);
+
+      const rule = await RulesyncRule.fromFile({
+        relativeFilePath: "copilot-rule.md",
+      });
+
+      expect(rule.getFrontmatter().copilot).toEqual({
+        excludeAgent: "code-review",
+      });
+      expect(rule.getBody()).toBe("Copilot-specific rule body");
+    });
+
+    it("should handle claudecode configuration in frontmatter", async () => {
+      const rulesDir = join(testDir, RULESYNC_RULES_RELATIVE_DIR_PATH);
+      await ensureDir(rulesDir);
+
+      const ruleContent = `---
+root: false
+targets:
+  - claudecode
+description: Claude Code rule
+claudecode:
+  paths:
+    - "src/**/*.ts"
+---
+
+Claude Code-specific rule body`;
+
+      const filePath = join(rulesDir, "claudecode-rule.md");
+      await writeFileContent(filePath, ruleContent);
+
+      const rule = await RulesyncRule.fromFile({
+        relativeFilePath: "claudecode-rule.md",
+      });
+
+      expect(rule.getFrontmatter().claudecode).toEqual({
+        paths: ["src/**/*.ts"],
+      });
+      expect(rule.getBody()).toBe("Claude Code-specific rule body");
+    });
+
+    it("should handle antigravity configuration in frontmatter", async () => {
+      const rulesDir = join(testDir, RULESYNC_RULES_RELATIVE_DIR_PATH);
+      await ensureDir(rulesDir);
+
+      const ruleContent = `---
+root: false
+targets:
+  - antigravity
+description: Antigravity rule
+antigravity:
+  trigger: "glob"
+  globs:
+    - "*.md"
+---
+
+Antigravity-specific rule body`;
+
+      const filePath = join(rulesDir, "antigravity-rule.md");
+      await writeFileContent(filePath, ruleContent);
+
+      const rule = await RulesyncRule.fromFile({
+        relativeFilePath: "antigravity-rule.md",
+      });
+
+      expect(rule.getFrontmatter().antigravity).toEqual({
+        trigger: "glob",
+        globs: ["*.md"],
+      });
+      expect(rule.getBody()).toBe("Antigravity-specific rule body");
+    });
+
     it("should load rule with localRoot field", async () => {
       const rulesDir = join(testDir, RULESYNC_RULES_RELATIVE_DIR_PATH);
       await ensureDir(rulesDir);
diff --git a/src/features/rules/rulesync-rule.ts b/src/features/rules/rulesync-rule.ts
index cc2f4cd60..f253f2dde 100644
--- a/src/features/rules/rulesync-rule.ts
+++ b/src/features/rules/rulesync-rule.ts
@@ -163,7 +163,10 @@ export class RulesyncRule extends RulesyncFile {
       description: result.data.description,
       globs: result.data.globs ?? [],
       agentsmd: result.data.agentsmd,
+      claudecode: result.data.claudecode,
       cursor: result.data.cursor,
+      copilot: result.data.copilot,
+      antigravity: result.data.antigravity,
     };
 
     return new RulesyncRule({