GitHub Copilot CLI v1.0.70 Adds GPT-5.6 Support and a /refine Prompt-Rewrite Command

GitHub·medium signal

Copilot CLI v1.0.70 (July 9, 2026) adds GPT-5.6 model support, a new /refine command that rewrites your prompt before execution, web_fetch proxy support, and better error handling for MCP and skill command failures; the prior v1.0.68 (July 1) added the kimi-k2.7-code model. The /refine command signals prompt-shaping is moving into the CLI itself rather than being a manual pre-step.