semgrep/semgrep
Oct 2025 – Apr 2026
5 Months active
Languages Used
MLRubyScalaShellGoRustJavaOCaml
Technical Skills
Code ParsingCompiler DesignStatic AnalysisTestingGoParsing
Marc-André Laverdière
PROFILE
Marc-andré Laverdière
Worked on the semgrep/semgrep repository, delivering language feature enhancements and static analysis improvements across Go, Rust, Java, and Scala. Focused on AST-based code analysis, this developer expanded implicit return detection, improved Rust type alias translation, and strengthened taint tracking in Go goroutines. They enhanced Java and Scala parsing by supporting qualified super syntax and refining type inference, while also simplifying Go module resolution and propagating inferred types in Scala. Their approach emphasized robust testing, cross-repository consistency, and maintainability, including codebase terminology standardization. The work demonstrated depth in compiler design, backend development, and static analysis, enabling more accurate multi-language code analysis.
Overall Statistics
Feature vs Bugs
90%Features
Repository Contributions
14Total
Bugs
1
Commits
14
Features
9
Lines of code
3,488
Activity Months5
Your Network
93 peopleWork History
April 2026
1 Commits • 1 Features
Apr 1, 2026April 2026 monthly summary for semgrep/semgrep: Implemented Codebase Terminology Standardization for Generated Identifiers by renaming IdInfo.hidden to fake across multiple files to reflect analyzer-generated identifiers. This aligns with engine conventions, reduces confusion for users and developers, and improves codebase maintainability. The change was driven by internal feedback and committed as b29dbda829ed7bca4ea6e08d35a9329a10cdfc62 under semgrep-proprietary#6012.
1 Commits • 1 Features
Apr 1, 2026April 2026 monthly summary for semgrep/semgrep: Implemented Codebase Terminology Standardization for Generated Identifiers by renaming IdInfo.hidden to fake across multiple files to reflect analyzer-generated identifiers. This aligns with engine conventions, reduces confusion for users and developers, and improves codebase maintainability. The change was driven by internal feedback and committed as b29dbda829ed7bca4ea6e08d35a9329a10cdfc62 under semgrep-proprietary#6012.
April 2026
March 2026
4 Commits • 2 Features
Mar 1, 2026In March 2026, delivered two high-impact language improvements for semgrep/semgrep, strengthening Go and Scala analysis and reducing onboarding time for Go projects while increasing parsing reliability for Scala.
March 2026
4 Commits • 2 Features
Mar 1, 2026In March 2026, delivered two high-impact language improvements for semgrep/semgrep, strengthening Go and Scala analysis and reducing onboarding time for Go projects while increasing parsing reliability for Scala.
January 2026
6 Commits • 3 Features
Jan 1, 2026Month: 2026-01 — Semgrep core: Language features and stability improvements. Key features delivered: - Java Qualified Super Syntax Support: updated AST and parser to permit qualified super access to methods and fields, with accompanying tests. - Scala Language Improvements: translation of Scala qualified super into internal IdSpecial representation, plus improvements to Scala linearization and superclass type support, with tests. - Java Method Resolution Improvements: initial implementation including enhanced overload resolution, support for interfaces with default methods, and caching of parent lookups to reduce false positives; groundwork for more accurate cross-language method resolution. Major bugs fixed / stability actions: - Reverted Java Method Resolution Improvements due to post-commit benchmark regressions; stability restored pending investigation into root cause. Overall impact and accomplishments: - Expanded language coverage and analysis fidelity for Java and Scala in Semgrep; improved AST representations and type-system interactions; increased test coverage; balanced feature progress with stability. Technologies/skills demonstrated: - Java and Scala language feature implementation, AST/parser transformations, type-system enhancements, performance-oriented caching, test planning and execution, and cross-language integration.
6 Commits • 3 Features
Jan 1, 2026Month: 2026-01 — Semgrep core: Language features and stability improvements. Key features delivered: - Java Qualified Super Syntax Support: updated AST and parser to permit qualified super access to methods and fields, with accompanying tests. - Scala Language Improvements: translation of Scala qualified super into internal IdSpecial representation, plus improvements to Scala linearization and superclass type support, with tests. - Java Method Resolution Improvements: initial implementation including enhanced overload resolution, support for interfaces with default methods, and caching of parent lookups to reduce false positives; groundwork for more accurate cross-language method resolution. Major bugs fixed / stability actions: - Reverted Java Method Resolution Improvements due to post-commit benchmark regressions; stability restored pending investigation into root cause. Overall impact and accomplishments: - Expanded language coverage and analysis fidelity for Java and Scala in Semgrep; improved AST representations and type-system interactions; increased test coverage; balanced feature progress with stability. Technologies/skills demonstrated: - Java and Scala language feature implementation, AST/parser transformations, type-system enhancements, performance-oriented caching, test planning and execution, and cross-language integration.
January 2026
November 2025
2 Commits • 2 Features
Nov 1, 2025November 2025 monthly summary for semgrep/semgrep focusing on delivering measurable business value and technical impact. Key features delivered: 1) Rust Type Alias Translation Enhancement – improved parsing and translation of Rust type definitions by correctly translating type aliases to AliasType (e.g., translating NewType usage to the proper AliasType). This change reduces parsing errors and improves accuracy in code analysis for Rust projects. Unit tests were added to reinforce correctness and guard against regressions. Closes semgrep/semgrep#11283. 2) Taint Tracking in Goroutines – extends taint analysis coverage by treating Go goroutines as regular function calls, increasing observability of taint flow in concurrent Go code. Includes updates to test suites. 3) Strengthened test coverage and regression safety – added targeted tests in OSS test suites for both Rust type alias handling and Go taint scenarios, with clear test plans referenced in commits. 4) Cross-repo hygiene and maintainability – synchronized changes across proprietary branches and OSS tests, ensuring reproducibility and easier future maintenance. Overall impact: improved correctness and reliability of static analysis for Rust and Go projects, enabling earlier detection of type-definition issues and taint propagation in concurrent code. Technologies/skills demonstrated: Rust type system handling, translation logic, Go taint tracking, unit/integration tests, test plans, cross-repo collaboration, and regression safety.
November 2025
2 Commits • 2 Features
Nov 1, 2025November 2025 monthly summary for semgrep/semgrep focusing on delivering measurable business value and technical impact. Key features delivered: 1) Rust Type Alias Translation Enhancement – improved parsing and translation of Rust type definitions by correctly translating type aliases to AliasType (e.g., translating NewType usage to the proper AliasType). This change reduces parsing errors and improves accuracy in code analysis for Rust projects. Unit tests were added to reinforce correctness and guard against regressions. Closes semgrep/semgrep#11283. 2) Taint Tracking in Goroutines – extends taint analysis coverage by treating Go goroutines as regular function calls, increasing observability of taint flow in concurrent Go code. Includes updates to test suites. 3) Strengthened test coverage and regression safety – added targeted tests in OSS test suites for both Rust type alias handling and Go taint scenarios, with clear test plans referenced in commits. 4) Cross-repo hygiene and maintainability – synchronized changes across proprietary branches and OSS tests, ensuring reproducibility and easier future maintenance. Overall impact: improved correctness and reliability of static analysis for Rust and Go projects, enabling earlier detection of type-definition issues and taint propagation in concurrent code. Technologies/skills demonstrated: Rust type system handling, translation logic, Go taint tracking, unit/integration tests, test plans, cross-repo collaboration, and regression safety.
October 2025
1 Commits • 1 Features
Oct 1, 20252025-10 Monthly Summary for semgrep/semgrep. Focused improvements in implicit return detection within code analysis, with enhancements to broaden coverage and accuracy across real-world code patterns.
1 Commits • 1 Features
Oct 1, 20252025-10 Monthly Summary for semgrep/semgrep. Focused improvements in implicit return detection within code analysis, with enhancements to broaden coverage and accuracy across real-world code patterns.
October 2025
Activity
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Quality Metrics
Correctness90.8%
Maintainability85.8%
Architecture85.8%
Performance84.2%
AI Usage35.6%
Skills & Technologies
Programming Languages
GoJavaMLOCamlRubyRustScalaShell
Technical Skills
Abstract Syntax Tree (AST)Code AnalysisCode ParsingCompiler DesignGoGo developmentJavaOCamlParsingRustScalaSoftware DevelopmentStatic AnalysisTestingType Inference
Repositories Contributed To
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