fix(build): prepare release dependency types during installation (#6978)

scripts/prepare.mjs

@@ -4,10 +4,10 @@ import { fileURLToPath } from "node:url";
 
 const root = join(dirname(fileURLToPath(import.meta.url)), "..");
 
-const sourceHuskyIsAvailable = async () => {
+const sourceDependencyIsAvailable = async (path) => {
   try {
     await access(join(root, "src"));
-    await access(join(root, "node_modules", "husky", "index.js"));
+    await access(join(root, "node_modules", path));
     return true;
   } catch (cause) {
     if (
@@ -21,7 +21,18 @@ const sourceHuskyIsAvailable = async () => {
   }
 };
 
-if (process.env.HUSKY !== "0" && (await sourceHuskyIsAvailable())) {
+// Runtime and type checking must both see the patched release dependency.
+// Published installs omit source and development dependencies.
+if (await sourceDependencyIsAvailable("release-please/package.json")) {
+  const { applyReleasePleasePatch } =
+    await import("./lib/release-proposal.mjs");
+  await applyReleasePleasePatch();
+}
+
+if (
+  process.env.HUSKY !== "0" &&
+  (await sourceDependencyIsAvailable("husky/index.js"))
+) {
   const { default: installHusky } = await import("husky");
   const message = installHusky();
   if (message.length > 0) process.stdout.write(`${message}\n`);