fix(coding-agent): use tar instead of unzip for .zip extraction on Windows

Windows does not ship with unzip, causing fd/rg download to fail on
first run in PowerShell. Use tar (bsdtar, available on Windows 10+)
for both .tar.gz and .zip extraction. Also adds proper error checking
on the extraction result.

fixes #1348

packages/coding-agent/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+### Fixed
+
+- Fixed fd/rg download failing on Windows due to `unzip` not being available; now uses `tar` for both `.tar.gz` and `.zip` extraction, with proper error reporting ([#1348](https://github.com/badlogic/pi-mono/issues/1348))
+
 ## [0.52.8] - 2026-02-07
 
 ### New Features

packages/coding-agent/src/utils/tools-manager.ts

@@ -153,10 +153,18 @@ async function downloadTool(tool: "fd" | "rg"): Promise<string> {
 	mkdirSync(extractDir, { recursive: true });
 
 	try {
-		if (assetName.endsWith(".tar.gz")) {
+		// Use tar for both .tar.gz and .zip extraction. Windows 10+ ships bsdtar
-			spawnSync("tar", ["xzf", archivePath, "-C", extractDir], { stdio: "pipe" });
+		// which handles both formats, avoiding the need for `unzip` (not available
-		} else if (assetName.endsWith(".zip")) {
+		// on Windows by default).
-			spawnSync("unzip", ["-o", archivePath, "-d", extractDir], { stdio: "pipe" });
+		const extractResult = assetName.endsWith(".tar.gz")
+			? spawnSync("tar", ["xzf", archivePath, "-C", extractDir], { stdio: "pipe" })
+			: assetName.endsWith(".zip")
+				? spawnSync("tar", ["xf", archivePath, "-C", extractDir], { stdio: "pipe" })
+				: null;
+
+		if (!extractResult || extractResult.error || extractResult.status !== 0) {
+			const errMsg = extractResult?.error?.message ?? extractResult?.stderr?.toString().trim() ?? "unknown error";
+			throw new Error(`Failed to extract ${assetName}: ${errMsg}`);
 		}
 
 		// Find the binary in extracted files