fix(driver): cache the embedded standard library per user

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/tools/driver/StandardLibrary.h b/tools/driver/StandardLibrary.h
index 5aa4f8c..0e641d0 100644
--- a/tools/driver/StandardLibrary.h
+++ b/tools/driver/StandardLibrary.h
@@ -3,9 +3,11 @@
 #include <string>
 #include <vector>
 
-// Extracted files live through native linking and runner execution.
+// Extracted files live through native linking and runner execution. They are cached per user
+// (never deleted); only the fallback temporary directory is removed on destruction.
 class StandardLibrary {
     llvm::SmallString<256> Directory;
+    bool Temporary = false;
 public:
     ~StandardLibrary();
     bool load(std::vector<std::string> &Inputs);