GitHub Copilot CLI 1.0.109 adds CIDR support and Claude Fable 5.2

GitHub Copilot CLI version 1.0.109 introduces IPv4 and IPv6 CIDR support for sandbox host rules, adds Claude Fable 5.2 to the model picker, and improves subagent column readability on narrow terminals. The update also refines MCP server removal guidance, directory path handling, Windows path separators, and parallel file operation permissions.

Official: https://github.com/github/copilot-cli/releases/tag/v1.0.109

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