May 29, 2026
Pre-launch sprint — content quality, performance, and developer surface
apicontentdashboard
Major pre-launch updates: 5-level LLM-calibrated difficulty grading, new `?quality=high` filter, cultural-affinity `?regions=` filter with a discovery endpoint and MCP tool, flat API key model with full-production Free tier, EN↔PL question quality parity, and a refreshed performance baseline.
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