cryspen/hax
Nov 2024 – May 2025
5 Months active
Languages Used
CoqF extF*MLRustShellTOMLYAML
Technical Skills
Backend DevelopmentBuild AutomationCI/CDCode CleanupCode ExamplesCode Formatting
Lasse Letager Hansen
PROFILE
Lasse Letager Hansen
Worked on the cryspen/hax repository to advance formal verification tooling, focusing on backend development and build automation for Coq, F*, and SSProve. Over five months, delivered features such as Coq backend support for ensures clauses, improved code generation fidelity, and stabilized snapshot testing across multiple languages. Enhanced maintainability by enforcing formatting standards, restructuring code organization, and integrating robust CI/CD pipelines using OCaml, Rust, and Shell scripting. Updated formal grammar documentation and improved onboarding materials, reducing technical debt and improving test reliability. The work emphasized correctness, maintainability, and cross-language test coverage, supporting formal methods and proof engineering in cryptographic software.
Overall Statistics
Feature vs Bugs
81%Features
Repository Contributions
64Total
Bugs
6
Commits
64
Features
26
Lines of code
97,098
Activity Months5
Your Network
27 peopleWork History
May 2025
10 Commits • 2 Features
May 1, 2025May 2025 monthly summary for cryspen/hax focusing on reliability, cross-language test coverage, and build hygiene. Delivered stabilization and correctness improvements for the Coq backend, enhanced snapshot test reliability across Coq, F*, and SSProve, and maintained SSProve snapshot testing with targeted config fixes. These efforts reduce flaky tests, improve determinism in CI, and accelerate feedback loops for backend development.
10 Commits • 2 Features
May 1, 2025May 2025 monthly summary for cryspen/hax focusing on reliability, cross-language test coverage, and build hygiene. Delivered stabilization and correctness improvements for the Coq backend, enhanced snapshot test reliability across Coq, F*, and SSProve, and maintained SSProve snapshot testing with targeted config fixes. These efforts reduce flaky tests, improve determinism in CI, and accelerate feedback loops for backend development.
May 2025
April 2025
7 Commits • 7 Features
Apr 1, 2025April 2025 — Cryspen/hax continued strengthening the Coq backend to support formal verification workflows for the hacspec ecosystem. Work delivered foundational groundwork, advanced AST and lemma support, improved naming and data type generation, clearer Hax conventions, and hardened test stability across codegen snapshots and test harnesses with targeted formatting and test maintenance.
April 2025
7 Commits • 7 Features
Apr 1, 2025April 2025 — Cryspen/hax continued strengthening the Coq backend to support formal verification workflows for the hacspec ecosystem. Work delivered foundational groundwork, advanced AST and lemma support, improved naming and data type generation, clearer Hax conventions, and hardened test stability across codegen snapshots and test harnesses with targeted formatting and test maintenance.
March 2025
1 Commits • 1 Features
Mar 1, 2025March 2025 work summary for cryspen/hax: delivered Coq backend support for ensures clauses with accompanying helpers to extract and format ensures expressions, and integrated post-conditions into lemma/definition generation to ensure generated Coq code accurately reflects specifications. This month emphasized formal verification correctness and generation fidelity.
1 Commits • 1 Features
Mar 1, 2025March 2025 work summary for cryspen/hax: delivered Coq backend support for ensures clauses with accompanying helpers to extract and format ensures expressions, and integrated post-conditions into lemma/definition generation to ensure generated Coq code accurately reflects specifications. This month emphasized formal verification correctness and generation fidelity.
March 2025
December 2024
3 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for cryspen/hax focusing on delivering formal language improvements and build reliability. The work strengthens the formal specification, reader guidance, and developer onboarding while preserving behavior.
December 2024
3 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for cryspen/hax focusing on delivering formal language improvements and build reliability. The work strengthens the formal specification, reader guidance, and developer onboarding while preserving behavior.
November 2024
43 Commits • 15 Features
Nov 1, 2024Month: 2024-11. Focused on delivering foundational improvements in cryspen/hax with an emphasis on maintainability, test coverage, and robust CI integration. Key outcomes include standardized formatting across the codebase, enhanced enum and record handling, and coverage-driven validation for Coq components. The work also advanced the core/library generation for Annotated Core and restructured handwritten code to improve project organization.
43 Commits • 15 Features
Nov 1, 2024Month: 2024-11. Focused on delivering foundational improvements in cryspen/hax with an emphasis on maintainability, test coverage, and robust CI integration. Key outcomes include standardized formatting across the codebase, enhanced enum and record handling, and coverage-driven validation for Coq components. The work also advanced the core/library generation for Annotated Core and restructured handwritten code to improve project organization.
November 2024
Activity
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Quality Metrics
Correctness86.6%
Maintainability86.8%
Architecture81.6%
Performance76.6%
AI Usage20.2%
Skills & Technologies
Programming Languages
CoqDuneEBNFF extF*MLMarkdownNixOCamlRust
Technical Skills
Automated TestingBackend DevelopmentBuild AutomationBuild System ManagementBuild SystemsCI/CDCode CleanupCode ExamplesCode FormattingCode GenerationCode ManagementCode OrganizationCode RefactoringCompiler Backend DevelopmentCompiler Design
Repositories Contributed To
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