joernio/joern
Jul 2025 – May 2026
3 Months active
Languages Used
JavaScalaPython
Technical Skills
Code AnalysisJava DevelopmentPython ParsingScala DevelopmentStatic AnalysisAST Generation
Fabian Yamaguchi
PROFILE
Fabian Yamaguchi
Over a three-month period, contributed to the joernio/joern repository by enhancing static code analysis capabilities across Python and C#. Delivered a feature that models Python generator yield statements as returns in the AST, improving analysis of generator-based code and adding targeted tests for correctness. Addressed bugs in Python import resolution by refining ImportsPass to handle relative imports, reducing downstream analysis errors. Improved C# AST generation by consolidating fixes for is expressions, increasing parsing accuracy and reliability. The work combined expertise in Python, Scala, and C#, with a focus on code analysis, AST generation, and rigorous test-driven development practices.
Overall Statistics
Feature vs Bugs
33%Features
Repository Contributions
3Total
Bugs
2
Commits
3
Features
1
Lines of code
167
Activity Months3
Your Network
23 peopleShared Repositories
23
Work History
May 2026
1 Commits • 1 Features
May 1, 2026In May 2026, delivered a feature in joernio/joern to improve Python generator analysis by rerepresenting yield statements as returns in the AST. This enables accurate modeling of generator-based code and strengthens code intelligence for Python projects. The work includes new tests to verify correctness and maintainability improvements through formatting and linting adjustments.
1 Commits • 1 Features
May 1, 2026In May 2026, delivered a feature in joernio/joern to improve Python generator analysis by rerepresenting yield statements as returns in the AST. This enables accurate modeling of generator-based code and strengthens code intelligence for Python projects. The work includes new tests to verify correctness and maintainability improvements through formatting and linting adjustments.
May 2026
February 2026
1 Commits
Feb 1, 2026February 2026 summary for joernio/joern: Focused on improving the correctness of C# AST generation within the code analysis tool. Delivered a targeted bug fix addressing is expressions and related AST nodes, consolidating two previously incorrect AST fixes into a single patch. This work enhances parsing accuracy, reduces potential false positives/negatives in C# code analysis, and strengthens the reliability of the AST pipeline.
February 2026
1 Commits
Feb 1, 2026February 2026 summary for joernio/joern: Focused on improving the correctness of C# AST generation within the code analysis tool. Delivered a targeted bug fix addressing is expressions and related AST nodes, consolidating two previously incorrect AST fixes into a single patch. This work enhances parsing accuracy, reduces potential false positives/negatives in C# code analysis, and strengthens the reliability of the AST pipeline.
July 2025
1 Commits
Jul 1, 2025Month: 2025-07 — Focused on correctness and test coverage for code property graph Python imports. Delivered a targeted bug fix that improves resolution and representation of relative imports (from . import Bar) in the ImportsPass, with an accompanying test to validate IMPORT node creation.
1 Commits
Jul 1, 2025Month: 2025-07 — Focused on correctness and test coverage for code property graph Python imports. Delivered a targeted bug fix that improves resolution and representation of relative imports (from . import Bar) in the ImportsPass, with an accompanying test to validate IMPORT node creation.
July 2025
Activity
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Quality Metrics
Correctness93.4%
Maintainability93.4%
Architecture93.4%
Performance93.4%
AI Usage20.0%
Skills & Technologies
Programming Languages
JavaPythonScala
Technical Skills
AST GenerationC#Code AnalysisJava DevelopmentPythonPython ParsingScalaScala DevelopmentStatic Analysiscode analysistesting
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline