v0.7.21

Changes

• Enforce distinct served-quality pools for Simple, Medium, and Complex routing tiers.
• Prevent Claude Code wrapper/title side-channel prompts from inflating user prompt complexity.
• Reclassify current model families across economy, balanced, and premium tiers.
• Filter superseded Gemini Pro model IDs when newer successors are available.

Verification

• ruff check uncommon_route tests
• pytest: 714 passed, 1 skipped