Claude Code v2.1.300 adds mod hooks, advisor support, and fixes many session bugs

Anthropic releases Claude Code v2.1.300, adding a prompt.change mod hook, virtualText decorations for mod prompts, and /advisor support on Claude Platform on AWS. The release also adds cache_creation_5m_tokens and cache_creation_1h_tokens to the OpenTelemetry api_request event and fixes many issues across sessions, worktrees, and remote control.