~10 quality-sensitive tests (planted-bug detection, design quality judge,
strategic review, retro analysis) explicitly pinned to Opus. ~30 structure
tests default to Sonnet for 5x speed improvement.
Added --retry 2 to all E2E scripts for flaky test resilience.
Added test:e2e:fast script that excludes 8 slowest tests for quick feedback.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>