
During March 2026, Marco focused on enhancing Python parsing robustness in the semgrep/semgrep repository, addressing a critical bug affecting files that use match statements. He extended the parser, written in Python, to correctly handle non-f-strings and edge cases such as empty strings and quotes within docstrings, thereby preventing syntax errors and reducing false negatives in code scanning. Marco added targeted tests to validate these improvements and ensured the full test suite passed. He also refined the Makefile install target to improve local development and CI reliability, aligning open-source contributions with upstream changes for ongoing repository consistency.
In 2026-03, core focus on improving Python parsing robustness in semgrep/semgrep, addressing a critical parsing bug for Python files that use match statements. The fix extends the parser to correctly handle non-f-strings with match statements, including edge cases such as empty strings and quotes in docstrings, preventing syntax errors. Added targeted tests to validate robustness (empty strings in f-strings tests and quotes in docstrings) and ensured the full test suite passes. The change also includes a small Makefile install target fix to improve local development and CI reliability, and OSS-sync alignment with upstream contributions (refs to related PRs) to keep repository in sync. This work directly reduces parsing-related false negatives and runtime errors, improving reliability of code scanning for Python projects that leverage match statements, and delivering measurable business value in security and quality insights.
In 2026-03, core focus on improving Python parsing robustness in semgrep/semgrep, addressing a critical parsing bug for Python files that use match statements. The fix extends the parser to correctly handle non-f-strings with match statements, including edge cases such as empty strings and quotes in docstrings, preventing syntax errors. Added targeted tests to validate robustness (empty strings in f-strings tests and quotes in docstrings) and ensured the full test suite passes. The change also includes a small Makefile install target fix to improve local development and CI reliability, and OSS-sync alignment with upstream contributions (refs to related PRs) to keep repository in sync. This work directly reduces parsing-related false negatives and runtime errors, improving reliability of code scanning for Python projects that leverage match statements, and delivering measurable business value in security and quality insights.

Overview of all repositories you've contributed to across your timeline