What’s New in GitHub Copilot CLI 1.0.109: CIDR Sandbox Rules and Fable 5.2

Copilot CLI 1.0.109 is out, after 1.0.108.

• IPv4 and IPv6 CIDR ranges are now supported for sandbox host allow and deny rules in settings. That’s the way to permit or block a whole network instead of one host at a time.
• Claude Fable 5.2 shows up in the model picker under New models. I covered the Fable 5.2 launch earlier this week.
• A handful of CLI fixes: /cd ~ and /add-dir ~ use the right path, “don’t ask again” on parallel file operations covers the rest of that batch, and /terminal-setup lands Shift+Enter in the right config dir on Linux when XDG_CONFIG_HOME is set.

My take

CIDR rules in the sandbox are the practical upgrade. Fable 5.2 in the picker is there if you already have access.

Review before you install: read the release notes yourself, back up your config, and try new versions somewhere you can afford to break first.

God Bless, and May the Source Be with You!

References & Further Reading

• GitHub Copilot CLI 1.0.109 (GitHub)
• What’s New in GitHub Copilot CLI 1.0.108 (EtherNinja)
• What’s New in Claude: Fable 5.2 and Mythos 5.2 (EtherNinja)