/configure

Change project settings (models, git strategy)

# Configure Sessions

Always runs interactively - asks all configuration questions regardless of arguments.

## Step 1: Find Git Root

Run `git rev-parse --show-toplevel` to locate the repository root.

## Step 2: Check for Sessions Directory

If `<git-root>/.sessions/` does not exist, tell the user to run `/sessions:start` first.

## Step 3: Read Current Config

Read `<git-root>/.sessions/config.json` if it exists to see current settings.

## Step 4: Ask All Configuration Questions

Use a single AskUserQuestion call with all 4 questions:

1. "What model for `/sessions:plan`?" (Header: "Pla...