Add unit tests for skill capabilities, skill planner, and UV setup

- Implement tests for random ID generation, ensuring preference for crypto.randomUUID.
- Create tests for runtime context capabilities, validating the injection of enabled skill capabilities.
- Add tests for skill capability parsing, including classification and command example extraction.
- Introduce tests for the skill planner, verifying tool call planning based on user requests and attachment requirements.
- Establish tests for UV setup, ensuring proper handling of Python installation scenarios and environment checks.

scripts/download-bundled-uv.mjs

@@ -53,11 +53,15 @@ async function setupTarget(id) {
   const tempDir = path.join(ROOT_DIR, 'temp_uv_extract');
   const archivePath = path.join(ROOT_DIR, target.filename);
   const downloadUrl = `${BASE_URL}/${target.filename}`;
+  const outputBinary = path.join(targetDir, target.binName);
 
   echo(chalk.blue`\n📦 Setting up uv for ${id}...`);
 
-  // Cleanup & Prep
-  await fs.remove(targetDir);
+  // Only remove the target binary, not the entire directory,
+  // so uv downloads do not wipe other bundled runtime files like node.exe.
+  if (await fs.pathExists(outputBinary)) {
+    await fs.remove(outputBinary);
+  }
   await fs.remove(tempDir);
   await fs.ensureDir(targetDir);
   await fs.ensureDir(tempDir);
@@ -96,7 +100,7 @@ async function setupTarget(id) {
     // uv archives usually contain a folder named after the target
     const folderName = target.filename.replace('.tar.gz', '').replace('.zip', '');
     const sourceBin = path.join(tempDir, folderName, target.binName);
-    const destBin = path.join(targetDir, target.binName);
+    const destBin = outputBinary;
 
     if (await fs.pathExists(sourceBin)) {
       await fs.move(sourceBin, destBin, { overwrite: true });
@@ -171,4 +175,4 @@ try {
   echo(chalk.yellow`   Packaging will continue without uv binary.`);
   // Exit with code 0 to allow packaging to continue
   process.exit(0);
-}
+}