[BUG] `.claude.json` is trucated directly, and so occasionally gets corrupted

Environment

• Platform (select one):
• [x] Anthropic API
• [ ] AWS Bedrock
• [ ] Google Vertex AI
• [ ] Other: <!-- specify -->
• Claude CLI version: <!-- output of claude --version --> 1.0.35
• Operating System: <!-- e.g. macOS 14.3, Windows 11, Ubuntu 22.04 --> macOS
• Terminal: <!-- e.g. iTerm2, Terminal App --> Alacritty

Bug Description

I occasionally get my .claude.json wiped. I _think_ that's happening because claude truncates it directly when writing an edit. and so if one process hasn't completed writing when another attempts to read, it'll get a corrupted file, and then wipes the whole thing

this becomes really evident when mounting it as a file to a container; if lots of claudes are running, and .claude.json is large, the container is fairly likely to get less than a full file given docker's mount performance

Expected Behavior

have claude do an atomic rename of .claude.json