You'll notice
Tool results now get a clear hint when saving oversized output to a temp file itself fails
What
When a large tool result (from an MCP task, a way of running external tools) is too big and Claude Code tries to save the overflow to a temporary file, that save can itself fail. Previously, if this happened, the truncated text was returned with no explanation. Now, when the save fails, a fixed message is attached explaining that the full output could not be saved.
Why
This stops the model from silently receiving cut-off tool output with no indication that something went wrong, making it clearer that the missing portion isn't just intentionally omitted but genuinely lost.