* fix: write fallback package.json for codebase mode to fix nsjail ERR_INVALID_PACKAGE_CONFIG Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com> * test: add e2e tests for codebase mode with and without nsjail Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>