During February 2026, BlackFrameAI developed a feature for the moeru-ai/airi repository focused on improving SSML prosody attribute formatting for speech synthesis. They introduced a toSignedPercent helper in TypeScript, ensuring that pitch and volume percentages are correctly formatted with a '+' prefix for positive values and without redundant minus signs. This adjustment enhanced the accuracy and consistency of SSML output, directly impacting the reliability of speech synthesis. Leveraging front end development and state management skills within a Vue.js environment, BlackFrameAI’s work addressed a nuanced formatting issue, demonstrating attention to detail and a targeted approach to solving domain-specific problems.