Calvin Lee developed two targeted features over a two-month period, focusing on backend development, content sanitization, and documentation. In the thoughtbot.social repository, Calvin built a MathML Content Sanitization Transformer for posts, using Ruby and regular expressions to extract LaTeX or plain text annotations from MathML elements. This approach improved the rendering and safety of mathematical content, reducing downstream remediation for scientific posts. In the leanprover/reference-manual repository, Calvin enhanced documentation by adding precise tagging to the Section Variables area using Lean, streamlining navigation and tooling references. Both features addressed specific workflow needs and demonstrated careful, detail-oriented engineering.