This week we shipped **Claude Code 2.0.31** with a new Plan subagent for Plan Mode, enhanced subagent capabilities, and SDK improvements including plugins and tool blocking. We also added prompt-based stop hooks, improved Windows mode switching, and fixed several bugs around MCP tools, permissions, and performance.

  
**Features:**

* New Plan subagent for Plan Mode with resume capability and dynamic model selection
* Added plugins to the Claude Code SDK
* Added disallowedTools field to custom agent definitions for explicit tool blocking
* Added --max-budget-usd flag to SDK
* Claude Code Web now shows diffs on changes
* Added prompt-based stop hooks
* Discovery of custom slash commands & subagents no longer respects gitignore
* Windows: native installation uses shift+tab for mode switching, instead of alt+m
* Deprecated output styles

  
**Bug fixes:**

* Fixed issue causing /compact to fail with prompt\_too\_long too often
* Fixed a bug where /context would sometimes fail with "max\_tokens must be greater than thinking.budget\_tokens" error message
* Fixed --mcp-config flag to correctly override file-based MCP configurations
* Fixed bug that saved session permissions to local settings
* Fixed MCP tools not being available to sub-agents
* Fixed hooks and plugins not executing when using --dangerously-skip-permissions flag
* Fixed delay when navigating through typeahead suggestions with arrow keys
* Fixed plugin uninstall not removing plugins