Month: 2025-12 | Repository: gleam-lang/stdlib Delivered Robust Dynamic Function Type Detection in the standard library by unifying function-arity guards into a single is_function/1 predicate. This enables accurate type detection for any function arity and tightens the reliability of dynamic checks across Gleam code paths. The change is associated with commit 700cdaf67fc22180d3c65206556bb8bc1734750e (replace is_function/2 guards with is_function/1). No major bugs reported this month. Overall impact: stronger stdlib support for dynamic function usage, reduced runtime edge cases, and safer interoperability between static and dynamic typing. Technologies/skills demonstrated: guard-based refactoring, dynamic type checks, functional programming discipline, and Git traceability across the stdlib project.