GitHub Copilot CLI 1.0.100 adds a telemetry opt-out flag and sandbox changes

Copilot CLI 1.0.100, released October 19, 2026, per its release notes:

• New: a --disable-client-telemetry flag; --trust-folder for one-off prompt-mode sessions; installing verified Skills and plugins from GitHub install links; a full-screen /share menu; semantic code search on by default for online sessions; and a /sandbox option to keep sandboxing on for the current session only.
• Sandbox: local network access is now allowed by default so commands can reach localhost and private-network services; host-rule traffic honors HTTPS_PROXY/HTTP_PROXY; sandboxed git on github.com can use a configured GITHUB_TOKEN.
• Fixes: sessions no longer stall when an MCP server hangs while loading tools, Gemini tool-call failures with enum array parameters and empty tool results are fixed, and reasoning-only max-token responses no longer loop.
• Path-specific instruction files in .github/instructions are applied automatically, and the built-in browser plugin is renamed browser-use.