feat(M3): Shared-source generator for agent variants

scripts/lib/skill-manager-core.mjs

@@ -279,7 +279,7 @@ async function findClaudeCodeSuperpowersPluginRoots(homeDir) {
 
 async function findCursorSuperpowersPluginRoots(homeDir) {
   const pluginRoot = path.join(homeDir, ".cursor", "plugins", "cache", "cursor-public", "superpowers");
-  let entries = [];
+  let entries;
   try {
     entries = await readdir(pluginRoot, { withFileTypes: true });
   } catch (error) {
@@ -598,7 +598,10 @@ export async function executeOperation(op) {
   if (op.action === "unsupported" || op.status === "skipped") return { ...op, status: "skipped" };
   if (op.kind === "package-skill") return { ...op, status: "included" };
   if (op.kind === "sync-pi-package") {
-    runCommand(path.join(op.repoRoot, "scripts", "sync-pi-package-skills.sh"), [], { cwd: op.repoRoot });
+    // Use the canonical generator (pnpm run sync:pi / node scripts/generate-skills.mjs).
+    // The legacy sync-pi-package-skills.sh is retired in M3; it bypassed the
+    // generator and copied skills/*/pi into pi-package directly, corrupting manifests.
+    runCommand(process.execPath, [path.join(op.repoRoot, "scripts", "generate-skills.mjs")], { cwd: op.repoRoot });
     return { ...op, status: "ok" };
   }
   if (op.kind === "pi-package") {