• [otlLib] buildCoverage: return empty Coverage instead of None (#4003, #4004).
• [instancer] bug fix in avar2 full instancing (#4002).
• [designspaceLib] Preserve empty conditionsets when serializing to XML (#4001).
• [fontBu ilder] Fix FontBuilder setupOS2() default params globally polluted (#3996, #3997).
• [ttFont] Add more typing annotations to ttFont, xmlWriter, sfnt, varLib.models and others (#3952, #3826).
• Explicitly test and declare support for Python 3.14, even though we were already shipping pre-built wheels for it (#3990).