In February 2025, Serhii Gubar established the foundational scaffolding for the sgubar/2025 repository, focusing on early project setup and utility development. He created comprehensive project documentation in Markdown to support onboarding and future maintenance. Serhii implemented a C program that performs substring search, allowing users to input a main string and a search pattern, then accurately reporting the starting position of the pattern within the string while handling newline characters. His work demonstrated proficiency in basic input/output operations, string manipulation, and documentation. The scope was foundational, with two features delivered and no bug fixes, reflecting an initial project phase.