fix: fix bun install bug

sdks/cli/bin/sandbox-agent

@@ -1,7 +1,40 @@
 #!/usr/bin/env node
 const { execFileSync } = require("child_process");
+const {
+  formatNonExecutableBinaryMessage,
+  isPermissionError,
+} = require("@sandbox-agent/cli-shared");
+const fs = require("fs");
 const path = require("path");
 
+const TRUST_PACKAGES =
+  "@sandbox-agent/cli-linux-x64 @sandbox-agent/cli-darwin-arm64 @sandbox-agent/cli-darwin-x64 @sandbox-agent/cli-win32-x64";
+
+function printExecutableHint(binPath) {
+  console.error(
+    formatNonExecutableBinaryMessage({
+      binPath,
+      trustPackages: TRUST_PACKAGES,
+      bunInstallBlocks: [
+        {
+          label: "Project install",
+          commands: [
+            `bun pm trust ${TRUST_PACKAGES}`,
+            "bun add @sandbox-agent/cli",
+          ],
+        },
+        {
+          label: "Global install",
+          commands: [
+            `bun pm -g trust ${TRUST_PACKAGES}`,
+            "bun add -g @sandbox-agent/cli",
+          ],
+        },
+      ],
+    }),
+  );
+}
+
 const PLATFORMS = {
   "darwin-arm64": "@sandbox-agent/cli-darwin-arm64",
   "darwin-x64": "@sandbox-agent/cli-darwin-x64",
@@ -19,7 +52,30 @@ if (!pkg) {
 try {
   const pkgPath = require.resolve(`${pkg}/package.json`);
   const bin = process.platform === "win32" ? "sandbox-agent.exe" : "sandbox-agent";
-  execFileSync(path.join(path.dirname(pkgPath), "bin", bin), process.argv.slice(2), { stdio: "inherit" });
+  const binPath = path.join(path.dirname(pkgPath), "bin", bin);
+  if (process.platform !== "win32") {
+    try {
+      fs.accessSync(binPath, fs.constants.X_OK);
+    } catch (error) {
+      try {
+        fs.chmodSync(binPath, 0o755);
+      } catch (chmodError) {
+        if (isPermissionError(chmodError)) {
+          printExecutableHint(binPath);
+        }
+        console.error(`Failed to make ${binPath} executable.`);
+        throw chmodError;
+      }
+    }
+  }
+  try {
+    execFileSync(binPath, process.argv.slice(2), { stdio: "inherit" });
+  } catch (execError) {
+    if (isPermissionError(execError)) {
+      printExecutableHint(binPath);
+    }
+    throw execError;
+  }
 } catch (e) {
   if (e.status !== undefined) process.exit(e.status);
   throw e;