Bisect a broken agent config with --safe-mode and disableBundledSkills

Claude Code Docs·medium signal

Week 24 adds --safe-mode (or CLAUDE_CODE_SAFE_MODE) to launch with all customizations off — CLAUDE.md, skills, plugins, hooks, MCP servers, and custom commands/agents do not load, while auth, model selection, built-in tools, and permissions still work. A companion disableBundledSkills setting hides bundled skills and built-in commands from the model. If a misbehavior vanishes in safe mode, you've isolated the offending surface in one step instead of disabling things one at a time.