Zed 1.6.3 adds Claude Opus 4.8 BYOK support and a Fast mode option for Anthropic and OpenAI models to get quicker responses at higher per-token cost. The agent now lets you share skills via links and manage threads with a right-click menu for regenerating titles, renaming, exporting as markdown, and archiving. Granular terminal sandbox permissions now allow agents to request write access to specific paths per command instead of all-or-nothing filesystem access. A new git: compare with branch action compares your current branch directly with any other branch.