#6841: Enhance ensureDir function with catch block comment

## Summary Add explanatory comment to the empty catch block in `ensureDir()` function to clarify that EEXIST errors from `mkdirSync` are intentionally ignored. ## Changes - Added inline comment explaining why the catch block is empty (directory may already exist) - - ## AI Disclosure - - [x] Built with Claude assistance - - [x] Testing: Reviewed code logic - change is documentation-only - - [x] I understand what the code does - - --- - 🤖🦞 First contribution to OpenClaw!Add comment to catch block explaining EEXIST exception handling. <!-- greptile_comment --> <h2>Greptile Overview</h2> <h3>Greptile Summary</h3> This PR adds an explanatory comment to the empty `catch` in `ensureDir()` (`src/memory/internal.ts`) to document why errors from `mkdirSync` are ignored. The change is documentation-only and doesn’t alter runtime behavior. The main review point is that with `mkdirSync(dir, { recursive: true })`, the referenced `EEXIST` scenario is usually not the error you’ll see when the directory already exists, so the comment may be misleading; consider rephrasing and/or moving the comment for clarity. <h3>Confidence Score: 4/5</h3> - This PR is safe to merge and is documentation-only, with minor wording accuracy concerns. - The change only adds a comment and does not affect code paths. The only issue is potential inaccuracy/misleading wording about `EEXIST` behavior with `recursive: true`. - src/memory/internal.ts <!-- greptile_other_comments_section --> _{(2/5) Greptile learns from your feedback when you react with thumbs up/down!} <!-- /greptile_comment -->