feat(spotify): implement milestone M1 scaffold

skills/spotify/scripts/setup.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+SKILL_DIR="$(cd "${SCRIPT_DIR}/.." && pwd)"
+
+cd "${SKILL_DIR}"
+npm install
+scripts/spotify auth

skills/spotify/scripts/spotify

@@ -0,0 +1,26 @@
+#!/usr/bin/env node
+
+import { existsSync } from "node:fs";
+import { dirname, join, resolve } from "node:path";
+import { fileURLToPath } from "node:url";
+import { spawnSync } from "node:child_process";
+
+const scriptDir = dirname(fileURLToPath(import.meta.url));
+const skillDir = resolve(scriptDir, "..");
+const tsxBin = join(skillDir, "node_modules", ".bin", "tsx");
+
+if (!existsSync(tsxBin)) {
+  process.stderr.write(`Missing local Node dependencies for spotify. Run 'cd ${skillDir} && npm install' first.\n`);
+  process.exit(1);
+}
+
+const result = spawnSync(process.execPath, [tsxBin, join(skillDir, "src", "cli.ts"), ...process.argv.slice(2)], {
+  stdio: "inherit"
+});
+
+if (result.error) {
+  process.stderr.write(`${result.error.message}\n`);
+  process.exit(1);
+}
+
+process.exit(typeof result.status === "number" ? result.status : 1);