From 25 Minutes to 14 Seconds: Migrating 9,000 Tests to Minitest with an AI Agent Swarm

03-Apr-2026 321
The RSpec suite took 25 minutes on a MacBook Pro M3 Pro. The migrated Minitest suite runs the same models in 14 seconds. I built a 6-gate multi-agent pipeline in Claude Code to migrate 9,000+ tests, using specialized agents with strict I/O contracts and fixtures instead of factories.
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