/learning-ab-test

[Learning] Manage A/B tests for agent prompts

Manage A/B testing of agent prompt variants. Test different versions of agent prompts to see which performs better.

**Commands:**

- `/learning:ab-test list` - List all active A/B tests
- `/learning:ab-test status <agent>` - Get status and results for an agent's test
- `/learning:ab-test create <agent>` - Create a new A/B test (interactive)
- `/learning:ab-test conclude <agent> [winner]` - Conclude a test and optionally apply the winner

**How A/B Testing Works:**

1. **Create a test**: Define a variant with modified prompt instructions
2. **Run agents**: The system randomly selects baseli...