Pedro Goulart focused on enhancing the Portuguese grammar checker within the languagetool-org/languagetool repository, addressing a persistent issue with false positives in the VERB_COMMA_CONJUNCTION rule. He refined the rule-based logic and parsing mechanisms using Java and natural language processing techniques, resulting in more accurate detection of grammatical structures. By introducing targeted tests, Pedro ensured that the improvements would be robust against future regressions. His work reduced the frequency of incorrect grammar alerts, improving the user experience and reliability of the tool. This contribution demonstrated a thoughtful approach to rule refinement and quality assurance in language technology systems.