EasyCrypt/easycrypt
Jan 2025 – Jun 2026
8 Months active
Languages Used
MLOCaml
Technical Skills
Automated Theorem ProvingCode AnalysisCode RefactoringCompiler DevelopmentDeveloper ToolingFunctional Programming
Gustavo Delerue
PROFILE
Gustavo Delerue
Worked extensively on the EasyCrypt/easycrypt repository, delivering core features and enhancements across automated theorem proving, bit-level logic, and code transformation workflows. Developed a bit-blasting backend enabling SMT-backed verification of bitvectors and Hoare goals, and introduced tactics for mapping high-level constructs to boolean circuits using OCaml and SMT solvers. Improved code folding, parsing, and type system maintainability through targeted refactoring and simplification. Enhanced developer tooling by refining hint processing, error handling, and code formatting, while also addressing memory management and regression issues. Demonstrated strong functional programming skills and collaborative development practices, contributing robust, testable solutions that improved reliability and extensibility.
Overall Statistics
Feature vs Bugs
85%Features
Repository Contributions
15Total
Bugs
2
Commits
15
Features
11
Lines of code
7,727
Activity Months8
Work History
June 2026
1 Commits • 1 Features
Jun 1, 2026June 2026 monthly summary for EasyCrypt/easycrypt focusing on the Bit-blasting backend delivery and associated enhancements.
1 Commits • 1 Features
Jun 1, 2026June 2026 monthly summary for EasyCrypt/easycrypt focusing on the Bit-blasting backend delivery and associated enhancements.
June 2026
April 2026
2 Commits • 1 Features
Apr 1, 2026April 2026 monthly summary for EasyCrypt/easycrypt: Delivered a new capability to bind fresh local variables in proc change via an optional [x: ty, ...] annotation, enabling replacement statements to reference newly bound variables and supporting more flexible code transformations. Fixed a memory-leak regression by ensuring Fglob reads are tracked in form_read, preventing crashes during automated processes. These changes enhance automation reliability, transformation power, and overall robustness of the codebase. Overall impact includes safer automated pipelines, reduced debugging effort, and higher transformation throughput. Technologies demonstrated include parsing, type processing, statement handling, and memory-tracking in code transformation tooling.
April 2026
2 Commits • 1 Features
Apr 1, 2026April 2026 monthly summary for EasyCrypt/easycrypt: Delivered a new capability to bind fresh local variables in proc change via an optional [x: ty, ...] annotation, enabling replacement statements to reference newly bound variables and supporting more flexible code transformations. Fixed a memory-leak regression by ensuring Fglob reads are tracked in form_read, preventing crashes during automated processes. These changes enhance automation reliability, transformation power, and overall robustness of the codebase. Overall impact includes safer automated pipelines, reduced debugging effort, and higher transformation throughput. Technologies demonstrated include parsing, type processing, statement handling, and memory-tracking in code transformation tooling.
March 2026
2 Commits • 1 Features
Mar 1, 2026March 2026 monthly update for EasyCrypt/easycrypt: Delivered core enhancements to Code Folding and Code Position Semantics, driving performance, reliability, and test coverage. Implemented a refactor of folding propagation to track substituted variables and preserved dependencies, introduced an eager folding mode, and extended code-position semantics with gap-based ranges, absolute/relative offsets, and a new range syntax. Added comprehensive tests and updated parser/typing/printing components to support the new forms. Result: faster, more reliable folding across assignments and structured instructions; improved code analysis capabilities and a solid foundation for future language features.
2 Commits • 1 Features
Mar 1, 2026March 2026 monthly update for EasyCrypt/easycrypt: Delivered core enhancements to Code Folding and Code Position Semantics, driving performance, reliability, and test coverage. Implemented a refactor of folding propagation to track substituted variables and preserved dependencies, introduced an eager folding mode, and extended code-position semantics with gap-based ranges, absolute/relative offsets, and a new range syntax. Added comprehensive tests and updated parser/typing/printing components to support the new forms. Result: faster, more reliable folding across assignments and structured instructions; improved code analysis capabilities and a solid foundation for future language features.
March 2026
February 2026
3 Commits • 2 Features
Feb 1, 2026February 2026: Delivered core feature enhancements and robustness improvements for EasyCrypt/easycrypt. Implemented the CFold tactic to optimize symbolic assignments by propagating known values, introducing notable runtime efficiency and code readability gains. Added printing enhancements for abstract statement hypotheses, including an optional handling for empty lists to improve output clarity during debugging and reviews. Strengthened memory-management error handling with a dedicated error type for expected two-sided goals, providing clearer, actionable feedback when goal shapes are not met. These changes reduce user friction, improve maintainability, and support faster iteration in formal verification workflows. The work reflects strong cross-team collaboration, as evidenced by co-authored commits, and reinforces the platform’s reliability and developer experience.
February 2026
3 Commits • 2 Features
Feb 1, 2026February 2026: Delivered core feature enhancements and robustness improvements for EasyCrypt/easycrypt. Implemented the CFold tactic to optimize symbolic assignments by propagating known values, introducing notable runtime efficiency and code readability gains. Added printing enhancements for abstract statement hypotheses, including an optional handling for empty lists to improve output clarity during debugging and reviews. Strengthened memory-management error handling with a dedicated error type for expected two-sided goals, providing clearer, actionable feedback when goal shapes are not met. These changes reduce user friction, improve maintainability, and support faster iteration in formal verification workflows. The work reflects strong cross-team collaboration, as evidenced by co-authored commits, and reinforces the platform’s reliability and developer experience.
January 2026
1 Commits • 1 Features
Jan 1, 2026January 2026 — EasyCrypt/easycrypt: Key features delivered: Removed prototype type-classes implementation to simplify the type system (commit ab3c76812a4e107e09711c5ad401440798e183d3); Major bugs fixed: None reported this month; Overall impact: Reduced technical debt, improved maintainability, and smoother pathway for future enhancements; Technologies/skills demonstrated: Refactoring discipline, type-system simplification, and strong version-control hygiene.
1 Commits • 1 Features
Jan 1, 2026January 2026 — EasyCrypt/easycrypt: Key features delivered: Removed prototype type-classes implementation to simplify the type system (commit ab3c76812a4e107e09711c5ad401440798e183d3); Major bugs fixed: None reported this month; Overall impact: Reduced technical debt, improved maintainability, and smoother pathway for future enhancements; Technologies/skills demonstrated: Refactoring discipline, type-system simplification, and strong version-control hygiene.
January 2026
November 2025
1 Commits • 1 Features
Nov 1, 2025Month: 2025-11 — Focused on enhancing code-change handling in EasyCrypt/easycrypt by adding Code Position Range Support in the Zipper Module. Delivered a new function to handle code position ranges, enabling range-based parsing and processing of procedure changes. Impact: improves accuracy and reliability of code-change tracking, reduces manual review, and lays groundwork for multi-line change handling. No major bugs fixed this period; effort was allocated to feature delivery and code quality. Technologies/skills demonstrated include feature design for parsing, precise commits, and repository collaboration within a multi-repo project.
November 2025
1 Commits • 1 Features
Nov 1, 2025Month: 2025-11 — Focused on enhancing code-change handling in EasyCrypt/easycrypt by adding Code Position Range Support in the Zipper Module. Delivered a new function to handle code position ranges, enabling range-based parsing and processing of procedure changes. Impact: improves accuracy and reliability of code-change tracking, reduces manual review, and lays groundwork for multi-line change handling. No major bugs fixed this period; effort was allocated to feature delivery and code quality. Technologies/skills demonstrated include feature design for parsing, precise commits, and repository collaboration within a multi-repo project.
October 2025
2 Commits • 2 Features
Oct 1, 2025Month: 2025-10 — Focused on delivering a more flexible program-update workflow in EasyCrypt/easycrypt, plus code clarity improvements. Key features delivered: Procedure Change Feature enabling modification of program statements with new tactics and parsing rules; Identifier Printing Refactor renaming EcIdent.tostring to tostring_internal and updating usages. Major bugs fixed: Fixed printing of identifiers to ensure consistent representation across the codebase. Overall impact: Enables safer, incremental program updates, reduces maintenance burden, and accelerates future transformation work. Technologies/skills demonstrated: feature/tactic design, parsing rule integration, API clarity through refactor, and thorough changelog/documentation practices.
2 Commits • 2 Features
Oct 1, 2025Month: 2025-10 — Focused on delivering a more flexible program-update workflow in EasyCrypt/easycrypt, plus code clarity improvements. Key features delivered: Procedure Change Feature enabling modification of program statements with new tactics and parsing rules; Identifier Printing Refactor renaming EcIdent.tostring to tostring_internal and updating usages. Major bugs fixed: Fixed printing of identifiers to ensure consistent representation across the codebase. Overall impact: Enables safer, incremental program updates, reduces maintenance burden, and accelerates future transformation work. Technologies/skills demonstrated: feature/tactic design, parsing rule integration, API clarity through refactor, and thorough changelog/documentation practices.
October 2025
January 2025
3 Commits • 2 Features
Jan 1, 2025Summary for 2025-01: Delivered two key improvements to hint processing in EasyCrypt/easycrypt that directly boost automation reliability, readability, and user productivity. No major bugs fixed this month. Key features delivered: - Enhanced printing of hint databases: added commands to print hints by type (simplify, solve, rewrite) or display all hints in the current scope; refined formatting and path shortening to improve readability of complex hint structures. This reduces time spent debugging proofs and makes hint datasets easier to audit. Commit references: 2317d82aea1eef3d64922a992bef370135e2f4ac; 3d69739e95e89a06bfb6d03b1a90ae5a3ee1aa31. - Rigid unification flag for hint exact/solve commands: introduces a rigid option to enable a rigid unification algorithm for lemma application, improving precision of automated theorem proving; updates to environment, command parsing, and printing accordingly. Commit reference: 5f7be80cc247e5ad91606e139b9b20c30be91d3c. Overall impact and accomplishments: - Increased reliability and speed of automated proofs by enabling precise hint application and clearer hint inspection, enabling researchers to scale hint databases with confidence. - Improved maintainability and extensibility of the hint subsystem through clearer command semantics and formatting rules. Technologies/skills demonstrated: - Command-line tooling enhancements, formatting improvements, and readablity-focused refactors. - Algorithmic refinement through the rigid unification feature. - Version control hygiene with descriptive commits and traceable changes to environment/printing logic.
January 2025
3 Commits • 2 Features
Jan 1, 2025Summary for 2025-01: Delivered two key improvements to hint processing in EasyCrypt/easycrypt that directly boost automation reliability, readability, and user productivity. No major bugs fixed this month. Key features delivered: - Enhanced printing of hint databases: added commands to print hints by type (simplify, solve, rewrite) or display all hints in the current scope; refined formatting and path shortening to improve readability of complex hint structures. This reduces time spent debugging proofs and makes hint datasets easier to audit. Commit references: 2317d82aea1eef3d64922a992bef370135e2f4ac; 3d69739e95e89a06bfb6d03b1a90ae5a3ee1aa31. - Rigid unification flag for hint exact/solve commands: introduces a rigid option to enable a rigid unification algorithm for lemma application, improving precision of automated theorem proving; updates to environment, command parsing, and printing accordingly. Commit reference: 5f7be80cc247e5ad91606e139b9b20c30be91d3c. Overall impact and accomplishments: - Increased reliability and speed of automated proofs by enabling precise hint application and clearer hint inspection, enabling researchers to scale hint databases with confidence. - Improved maintainability and extensibility of the hint subsystem through clearer command semantics and formatting rules. Technologies/skills demonstrated: - Command-line tooling enhancements, formatting improvements, and readablity-focused refactors. - Algorithmic refinement through the rigid unification feature. - Version control hygiene with descriptive commits and traceable changes to environment/printing logic.
Activity
Loading activity data...
Quality Metrics
Correctness89.4%
Maintainability82.6%
Architecture86.0%
Performance80.6%
AI Usage30.6%
Skills & Technologies
Programming Languages
MLOCaml
Technical Skills
Automated Theorem ProvingBit-level LogicCode AnalysisCode RefactoringCompiler DesignCompiler DevelopmentDeveloper ToolingFormal VerificationFunctional ProgrammingLogic ProgrammingOCamlPretty PrintingSMT Solversautomated testingcode formatting
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline