The AI code reviewers have been completely refactored to use the new Anthropic Claude Agent SDK and a local MCP (Model Context Protocol) server, replacing the Vercel AI SDK implementation. Instead of interacting with the codebase via risky custom git grep and git ls-tree shell commands, agents now operate on a temporary clone of the proposal branch and leverage Claude's built-in Read, Grep, and Glob tools natively. This delegates file exploration entirely to standard SDK tools while domain-specific operations (like casting votes onchain) are exposed cleanly through the MCP server.