acl2/acl2
Feb 2025 – Feb 2026
13 Months active
Languages Used
CCommon LispLispGitLaTeXTextMakefileShell
Technical Skills
ACL2AST ManipulationC ProgrammingC TransformationCode AnalysisCode Correction
Grant Jurgensen
PROFILE
Grant Jurgensen
Grant Jurgensen developed core language tooling and advanced transformation utilities for the acl2/acl2 repository, focusing on robust C language parsing, type system engineering, and formal verification. He designed and implemented features such as deterministic set and map libraries, UID-based validation, and cross-compiler C/C$ tooling, using Common Lisp and C. His work included performance optimizations, build system modernization, and comprehensive test coverage, addressing real-world compatibility and maintainability. By integrating database-backed search, enhancing macro usability, and expanding theorem-proving capabilities, Grant delivered solutions that improved code safety, developer productivity, and the extensibility of the ACL2 formal methods ecosystem.
Overall Statistics
Feature vs Bugs
79%Features
Repository Contributions
317Total
Bugs
37
Commits
317
Features
138
Lines of code
197,218
Activity Months13
Your Network
30 peopleShared Repositories
30
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Ankit KumarMember
Eric McCarthyMember
Cuong ChauMember
David RussinoffMember
Daniil IaitskovMember
Work History
February 2026
20 Commits • 7 Features
Feb 1, 2026February 2026: Delivered essential features, performance improvements, and reliability fixes across acl2/acl2. Key outcomes include: improved type flexibility via deffold-map list type overrides; robust C code section-attribute handling with tests and related refactors; UID reliability in the validator ensuring redeclarations reuse UIDs and duplicates are avoided; ACL2 theorem prover enhancements to support cardinality and subset operations; and a performance-optimized type completions map, complemented by code organization and documentation improvements to enhance maintainability and onboarding.
20 Commits • 7 Features
Feb 1, 2026February 2026: Delivered essential features, performance improvements, and reliability fixes across acl2/acl2. Key outcomes include: improved type flexibility via deffold-map list type overrides; robust C code section-attribute handling with tests and related refactors; UID reliability in the validator ensuring redeclarations reuse UIDs and duplicates are avoided; ACL2 theorem prover enhancements to support cardinality and subset operations; and a performance-optimized type completions map, complemented by code organization and documentation improvements to enhance maintainability and onboarding.
February 2026
January 2026
53 Commits • 30 Features
Jan 1, 2026January 2026 (acl2/acl2) — Expanded arithmetic reasoning capabilities, strengthened the data layer and tooling, and improved documentation and release processes. Key work combined feature development, robustness improvements, and cross-compiler readiness to deliver business value through more expressive books, safer macros, and a cleaner release narrative. Core bets for the month included new arithmetic reasoning foundations, a data-lib overhaul with a treeset rewrite, and broad C/C$ tooling enhancements that unify GCC/Clang support and validation workflows.
January 2026
53 Commits • 30 Features
Jan 1, 2026January 2026 (acl2/acl2) — Expanded arithmetic reasoning capabilities, strengthened the data layer and tooling, and improved documentation and release processes. Key work combined feature development, robustness improvements, and cross-compiler readiness to deliver business value through more expressive books, safer macros, and a cleaner release narrative. Core bets for the month included new arithmetic reasoning foundations, a data-lib overhaul with a treeset rewrite, and broad C/C$ tooling enhancements that unify GCC/Clang support and validation workflows.
December 2025
16 Commits • 3 Features
Dec 1, 2025December 2025 Monthly Summary — acl2/acl2 Key features delivered and major fixes: - Implementation Environment Management Enhancements: Adds an environment management utility to create an implementation environment object by executing a C program and interpreting its output; introduces structured ienv handling with two variants (irr-ienv and ienv-default) and updates tests to accommodate the new environment model. Representative commits include 41e5c716af802899acb988366283180cfb4bc353 and 8f3082738bde2ae29b12516dbeb1712ffd8b63b4, with related refinements (c8149adc49d0a84daa0d9314abe1005785481bce, 26f5e2a3cc9599f1e4f7167451b96ae183ee48bb). - Omaps Library Enhancements and Proofs: Expands the Ordered Maps (omaps) library with new books and capabilities, including assoc and submap, compatibility checks, update/delete semantics, extensionality, and extensive proofs updates; also adds related proof refinements and theorem reorganizations. Notable commits include 977ad8105e37079d92e999745495ba76dbd3de81, af3e9239dfcef6c3a0948ea9b9271512904a4016, 441296a94c2aed4c0bd9198962ae7c81037482bc, 37ebffc01404a2e7ada9c75dd4c69230fd79df37, and follow-ups. - Macro Usability Enhancement for defirrelevant: Adds a descriptive long option to the defirrelevant macro to improve usability by providing a longer description of the dummy value. Representative commit: 6eb82dba7a189bb8ef3d33029ecddcce968d228d. Major bugs fixed and maintenance: - Test and compatibility updates accompanying the environment model shift; proofs and book reorganizations adjusted to align with new omaps semantics; minor documentation and xdoc corrections in the omaps suite. Overall impact and accomplishments: - Strengthened tooling for environment setup and test evaluation, reducing CI instability and onboarding time; expanded formal reasoning capabilities with a more expressive omaps library and robust proofs; improved macro usability to lower entry barriers for users. Technologies/skills demonstrated: - C integration and test-driven environment modeling; formal verification and theorem proving practices; library design, proof maintenance, and book-based organization; code quality improvements and cross-team collaboration.
16 Commits • 3 Features
Dec 1, 2025December 2025 Monthly Summary — acl2/acl2 Key features delivered and major fixes: - Implementation Environment Management Enhancements: Adds an environment management utility to create an implementation environment object by executing a C program and interpreting its output; introduces structured ienv handling with two variants (irr-ienv and ienv-default) and updates tests to accommodate the new environment model. Representative commits include 41e5c716af802899acb988366283180cfb4bc353 and 8f3082738bde2ae29b12516dbeb1712ffd8b63b4, with related refinements (c8149adc49d0a84daa0d9314abe1005785481bce, 26f5e2a3cc9599f1e4f7167451b96ae183ee48bb). - Omaps Library Enhancements and Proofs: Expands the Ordered Maps (omaps) library with new books and capabilities, including assoc and submap, compatibility checks, update/delete semantics, extensionality, and extensive proofs updates; also adds related proof refinements and theorem reorganizations. Notable commits include 977ad8105e37079d92e999745495ba76dbd3de81, af3e9239dfcef6c3a0948ea9b9271512904a4016, 441296a94c2aed4c0bd9198962ae7c81037482bc, 37ebffc01404a2e7ada9c75dd4c69230fd79df37, and follow-ups. - Macro Usability Enhancement for defirrelevant: Adds a descriptive long option to the defirrelevant macro to improve usability by providing a longer description of the dummy value. Representative commit: 6eb82dba7a189bb8ef3d33029ecddcce968d228d. Major bugs fixed and maintenance: - Test and compatibility updates accompanying the environment model shift; proofs and book reorganizations adjusted to align with new omaps semantics; minor documentation and xdoc corrections in the omaps suite. Overall impact and accomplishments: - Strengthened tooling for environment setup and test evaluation, reducing CI instability and onboarding time; expanded formal reasoning capabilities with a more expressive omaps library and robust proofs; improved macro usability to lower entry barriers for users. Technologies/skills demonstrated: - C integration and test-driven environment modeling; formal verification and theorem proving practices; library design, proof maintenance, and book-based organization; code quality improvements and cross-team collaboration.
December 2025
November 2025
24 Commits • 20 Features
Nov 1, 2025November 2025 delivered a cohesive set of core feature enhancements, preprocessing and build-tooling improvements, and targeted bug fixes for acl2/acl2. The work focused on increasing configurability, improving build reliability, and strengthening the foundation for wrap-fn style transformations, while also improving documentation and developer experience. The team aligned feature delivery with practical business value by enabling safer book configurations, more robust preprocessing, and smoother integration with compilation databases.
November 2025
24 Commits • 20 Features
Nov 1, 2025November 2025 delivered a cohesive set of core feature enhancements, preprocessing and build-tooling improvements, and targeted bug fixes for acl2/acl2. The work focused on increasing configurability, improving build reliability, and strengthening the foundation for wrap-fn style transformations, while also improving documentation and developer experience. The team aligned feature delivery with practical business value by enabling safer book configurations, more robust preprocessing, and smoother integration with compilation databases.
October 2025
11 Commits • 3 Features
Oct 1, 2025Monthly work summary for 2025-10 focusing on delivering core feature improvements, performance optimizations, and system modernization for acl2/acl2. The work emphasizes business value through stronger type safety, faster execution, and more configurable tooling, with an emphasis on quality, testing, and documentation.
11 Commits • 3 Features
Oct 1, 2025Monthly work summary for 2025-10 focusing on delivering core feature improvements, performance optimizations, and system modernization for acl2/acl2. The work emphasizes business value through stronger type safety, faster execution, and more configurable tooling, with an emphasis on quality, testing, and documentation.
October 2025
September 2025
28 Commits • 13 Features
Sep 1, 2025September 2025 monthly summary for acl2/acl2: The C$ type checker and associated tooling saw substantial feature delivery, stronger correctness guarantees, and expanded real‑world applicability. Key features delivered include GCC built-in function support in the C$ type checker, pointer type parameterization with test coverage, array type enhancements with an element type field and tightened null-pointer checks, extended support for pointer types in type-formalp and ldm-type, and the addition of return types to function types. Tooling improvements included C$ preprocessor argument handling with omap support and compilation database utilities. Major bugs fixed include proper scope handling for initializers (ensuring identifiers are added to scope before processing initializer expressions), corrected validation of casts to void (adjusting non-void handling and function-to-pointer conversions), and expanded validation of initializers with improved handling for complex initializer cases. A termination check bug in the on-logic-mode path was also resolved. Overall impact: the work increases reliability and compatibility with real-world C code (e.g., glibc patterns), reduces false positives in type checking, and accelerates downstream development through better test coverage and build tooling. This demonstrates strong capabilities in type-system engineering, tooling integration, and test-driven development, while delivering tangible business value through safer code analysis and broader language feature support.
September 2025
28 Commits • 13 Features
Sep 1, 2025September 2025 monthly summary for acl2/acl2: The C$ type checker and associated tooling saw substantial feature delivery, stronger correctness guarantees, and expanded real‑world applicability. Key features delivered include GCC built-in function support in the C$ type checker, pointer type parameterization with test coverage, array type enhancements with an element type field and tightened null-pointer checks, extended support for pointer types in type-formalp and ldm-type, and the addition of return types to function types. Tooling improvements included C$ preprocessor argument handling with omap support and compilation database utilities. Major bugs fixed include proper scope handling for initializers (ensuring identifiers are added to scope before processing initializer expressions), corrected validation of casts to void (adjusting non-void handling and function-to-pointer conversions), and expanded validation of initializers with improved handling for complex initializer cases. A termination check bug in the on-logic-mode path was also resolved. Overall impact: the work increases reliability and compatibility with real-world C code (e.g., glibc patterns), reduces false positives in type checking, and accelerates downstream development through better test coverage and build tooling. This demonstrates strong capabilities in type-system engineering, tooling integration, and test-driven development, while delivering tangible business value through safer code analysis and broader language feature support.
August 2025
67 Commits • 29 Features
Aug 1, 2025Monthly summary for 2025-08 (acl2/acl2): Delivered a set of high-impact features and reliability improvements across the repository, focused on time API reliability, language feature enhancements, and search/indexing performance. Key features delivered include: OS LIB: Get-Decoded-Time API introduced with edge-case handling and refined year-return behavior; Documentation: time zone added to top-doc date; GCC built-ins integration in C$ with extraction and documentation. Major search-related work includes Web Manual search improvements using SQLite FTS5 for server-side long XDOC searches, plus client-side integration; and a Web Manual database refactor to standardize structure and enable efficient full-text search. UID and validation improvements introduced across core language constructs for robust linkage checks, with accompanying tests and metadata support. Overall impact and accomplishments: Strengthened core language/tooling surface (time API, C$ features, UID validation), improved search accuracy and performance across the Web Manual, and increased maintainability through database refactors and documentation hygiene. These changes accelerate developer productivity, enable deeper indexing/search capabilities for end users, and reduce risk through targeted bug fixes and code quality improvements. Technologies/skills demonstrated: OS library API design and refinement; compiler/language feature development (C$), including 128-bit integers and thread-local storage; SQLite FTS5-based search indexing; web/manual data architecture and refactoring; UID-based validation and linkage checks; XDOC/DOC hygiene and test coverage.
67 Commits • 29 Features
Aug 1, 2025Monthly summary for 2025-08 (acl2/acl2): Delivered a set of high-impact features and reliability improvements across the repository, focused on time API reliability, language feature enhancements, and search/indexing performance. Key features delivered include: OS LIB: Get-Decoded-Time API introduced with edge-case handling and refined year-return behavior; Documentation: time zone added to top-doc date; GCC built-ins integration in C$ with extraction and documentation. Major search-related work includes Web Manual search improvements using SQLite FTS5 for server-side long XDOC searches, plus client-side integration; and a Web Manual database refactor to standardize structure and enable efficient full-text search. UID and validation improvements introduced across core language constructs for robust linkage checks, with accompanying tests and metadata support. Overall impact and accomplishments: Strengthened core language/tooling surface (time API, C$ features, UID validation), improved search accuracy and performance across the Web Manual, and increased maintainability through database refactors and documentation hygiene. These changes accelerate developer productivity, enable deeper indexing/search capabilities for end users, and reduce risk through targeted bug fixes and code quality improvements. Technologies/skills demonstrated: OS library API design and refinement; compiler/language feature development (C$), including 128-bit integers and thread-local storage; SQLite FTS5-based search indexing; web/manual data architecture and refactoring; UID-based validation and linkage checks; XDOC/DOC hygiene and test coverage.
August 2025
July 2025
33 Commits • 15 Features
Jul 1, 2025July 2025 monthly summary for acl2/acl2. Highlights include major feature delivery, reliability improvements, and skills demonstrated across C2C backend, documentation, and CI pipelines. Key outcomes: - C2C Split-Fn Enhancements: improved split-fn, updated tests, and added split-fn documentation; - C2C: Improve specialize and splitGSO; added split-fn-when transformation; - Documentation: Comprehensive updates to How-to-Contribute and Best Practices, including 32-bit Lisp notes and contributor feedback incorporated; - C$: Add alistp theorem in C$ backend; - CI/Build reliability: Jenkins make target fixed and deploy-web-manual.sh trimmed for CI.
July 2025
33 Commits • 15 Features
Jul 1, 2025July 2025 monthly summary for acl2/acl2. Highlights include major feature delivery, reliability improvements, and skills demonstrated across C2C backend, documentation, and CI pipelines. Key outcomes: - C2C Split-Fn Enhancements: improved split-fn, updated tests, and added split-fn documentation; - C2C: Improve specialize and splitGSO; added split-fn-when transformation; - Documentation: Comprehensive updates to How-to-Contribute and Best Practices, including 32-bit Lisp notes and contributor feedback incorporated; - C$: Add alistp theorem in C$ backend; - CI/Build reliability: Jenkins make target fixed and deploy-web-manual.sh trimmed for CI.
June 2025
16 Commits • 4 Features
Jun 1, 2025For 2025-06, ACL2/acl2 delivered significant refactoring, robustness improvements, and build modernization that collectively elevate code safety, maintainability, and delivery confidence. Key features and reliability enhancements were implemented across core AST handling, variable substitution, and build tooling, with targeted tests to increase coverage and prevent regressions.
16 Commits • 4 Features
Jun 1, 2025For 2025-06, ACL2/acl2 delivered significant refactoring, robustness improvements, and build modernization that collectively elevate code safety, maintainability, and delivery confidence. Key features and reliability enhancements were implemented across core AST handling, variable substitution, and build tooling, with targeted tests to increase coverage and prevent regressions.
June 2025
May 2025
9 Commits • 3 Features
May 1, 2025Summary for May 2025: Focused on elevating mapping automation, type safety, and test reliability across acl2/acl2. Delivered the deffold-map macro with core functionality, extended capabilities (ignoring extra args, :print verbosity), documentation, and tests; migrated usage from deftrans. Enhanced OMAP update type-prescription to return a true list, improving type-checking. Centralized flextype access such that flextype->fix accessor now handles flexsum, flexlist, and flexset. Stabilized tests by defaulting the C preprocessor to -std=c17, addressing GCC 11+ changes. These changes collectively improve developer productivity, reduce runtime errors, and strengthen cross-module consistency.
May 2025
9 Commits • 3 Features
May 1, 2025Summary for May 2025: Focused on elevating mapping automation, type safety, and test reliability across acl2/acl2. Delivered the deffold-map macro with core functionality, extended capabilities (ignoring extra args, :print verbosity), documentation, and tests; migrated usage from deftrans. Enhanced OMAP update type-prescription to return a true list, improving type-checking. Centralized flextype access such that flextype->fix accessor now handles flexsum, flexlist, and flexset. Stabilized tests by defaulting the C preprocessor to -std=c17, addressing GCC 11+ changes. These changes collectively improve developer productivity, reduce runtime errors, and strengthen cross-module consistency.
April 2025
28 Commits • 6 Features
Apr 1, 2025April 2025: Delivered stability and correctness improvements across validation, typedefs, and file-path handling in acl2/acl2. Key features include stabilizing file-name handling, hardening the validator, strengthening typedef validation and the type system, expanding typedef support in SplitGSO and preprocess-files, and comprehensive documentation/XDOC updates. These changes reduce defect surface, improve data integrity, and speed up future development.
28 Commits • 6 Features
Apr 1, 2025April 2025: Delivered stability and correctness improvements across validation, typedefs, and file-path handling in acl2/acl2. Key features include stabilizing file-name handling, hardening the validator, strengthening typedef validation and the type system, expanding typedef support in SplitGSO and preprocess-files, and comprehensive documentation/XDOC updates. These changes reduce defect surface, improve data integrity, and speed up future development.
April 2025
March 2025
4 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary for acl2/acl2 focusing on a major feature delivery: Treeset Library, deterministic treap-based sets with core operations; addition of test scaffolding and API/type definitions; and documentation improvements. The work delivers a robust, scalable set abstraction with deterministic behavior, supporting core operations and enabling performance benchmarking and better developer guidance. No documented bug fixes were reported for this period; primary focus was feature delivery and code quality improvements.
March 2025
4 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary for acl2/acl2 focusing on a major feature delivery: Treeset Library, deterministic treap-based sets with core operations; addition of test scaffolding and API/type definitions; and documentation improvements. The work delivers a robust, scalable set abstraction with deterministic behavior, supporting core operations and enabling performance benchmarking and better developer guidance. No documented bug fixes were reported for this period; primary focus was feature delivery and code quality improvements.
February 2025
8 Commits • 4 Features
Feb 1, 2025Feb 2025 monthly summary for acl2/acl2 focusing on C2C transformation robustness and AST tooling. Delivered key utilities and transformation enhancements, improved analysis accuracy, and fixed internal stability issues to support safer, scalable code rewrites.
8 Commits • 4 Features
Feb 1, 2025Feb 2025 monthly summary for acl2/acl2 focusing on C2C transformation robustness and AST tooling. Delivered key utilities and transformation enhancements, improved analysis accuracy, and fixed internal stability issues to support safer, scalable code rewrites.
February 2025
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Quality Metrics
Correctness93.8%
Maintainability90.4%
Architecture90.0%
Performance87.2%
AI Usage22.4%
Skills & Technologies
Programming Languages
ABNFCCSSCommon LispEmacs LispGitJSONJavaScriptLaTeXLisp
Technical Skills
ACL2ACL2 Theorem ProvingAPI DesignAPI IntegrationAPI RefactoringAST ManipulationAbstract Syntax TreesAlgorithm DesignAlgorithm designAutomated Theorem ProvingBackend DevelopmentBug FixingBuild System ConfigurationBuild SystemsC
Repositories Contributed To
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