diff --git a/packages/coding-agent/test/package-distribution.test.ts b/packages/coding-agent/test/package-distribution.test.ts
index 2fe5380ec..69e39fb8f 100644
--- a/packages/coding-agent/test/package-distribution.test.ts
+++ b/packages/coding-agent/test/package-distribution.test.ts
@@ -6,7 +6,8 @@ interface CodingAgentPackageJson {
 	main: string;
 	exports: {
 		".": { import: string; types: string };
-		"./client": { import: string; types: string };
+		"./client": { source: string };
+		"./experimental/plugin": { source: string };
 		"./rpc-entry": { import: string };
 	};
 }
@@ -20,7 +21,12 @@ describe("package distribution entrypoints", () => {
 		expect(packageJson.bin.pi).toBe("dist/bundle/cli.js");
 		expect(packageJson.main).toBe("./dist/index.js");
 		expect(packageJson.exports["."].import).toBe("./dist/index.js");
-		expect(packageJson.exports["./client"].import).toBe("./dist/client/index.js");
 		expect(packageJson.exports["./rpc-entry"].import).toBe("./dist/bundle/rpc-entry.js");
 	});
+
+	// Regression for #9132: internal experimental entrypoints must not be published runtime exports.
+	test("keeps experimental exports source-only", () => {
+		expect(packageJson.exports["./client"]).toEqual({ source: "./src/client/index.ts" });
+		expect(packageJson.exports["./experimental/plugin"]).toEqual({ source: "./src/experimental/plugin.ts" });
+	});
 });