Claude Code 2.1.287 adds Mods and closes permission gaps
Anthropic released Claude Code 2.1.287 with Claude Mods for deeper plugin behavior changes and a built-in side-agent mod called You should know. The same release adds MCP URL prompts and many fixes spanning model policy, destructive shell safeguards, MCP permission ceilings, guardrail responses, remote control, cloud sessions and accessibility.
Why it matters: Mods widen what plugins can change inside the coding agent while the fixes close several authority and recovery failures. Teams need to treat 2.1.287 as both a new extension boundary and a security-sensitive regression checkpoint.