Tip: Copilot CLI 1.0.88 lets you /fork mid-turn, and repo-relative hook scripts resolve again

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Copilot CLI v1.0.88 allows /fork during an active turn, so you can branch work without waiting for the agent to finish. It also fixes hook commands without an explicit cwd, which again run in the project root rather than the session's current directory, so repo-relative hook scripts work from subdirectories. A custom agent's reasoning-effort setting now applies when that agent is selected, and an explicit --reasoning-effort flag still wins.