Codex trims context window, blocks rm rf $HOME to stop data loss

The recent updates to Codex involve lowering the context window from 372K to 272K to address billing issues and excessive consumption of resources. This change may lead to increased frequency of memory compression, potentially causing 'amnesia' in long tasks. Additionally, the must-not-execute rule for 'rm -rf $HOME' has been implemented to prevent accidental deletion of user files, a serious error that previously occurred. Users are now advised to manually approve sensitive commands or use the 'approve-on-my-behalf' option to enhance safety.