acl2/acl2
Feb 2025 – Feb 2026
13 Months active
Languages Used
ACL2ACL2 LispCommon LispLisplispMarkdownMakefileTeX
Technical Skills
x86 ISA ModelingACL2ACL2 DevelopmentACL2 Theorem ProverACL2 Theorem ProvingAlgorithm Design
Eric Smith
PROFILE
Eric Smith
Ethan Smith developed and maintained the acl2/acl2 repository, delivering robust automated verification tooling and cross-architecture backend support. He engineered rule-based systems for Axe, X86, ARM, and RISC-V, focusing on scalable theorem proving and formal verification. Using Common Lisp and C, Ethan implemented lifters, unrollers, and memory models, integrating features like symbolic execution, SMT solver support, and executable parsing. His work emphasized modular code organization, reduced build dependencies, and improved documentation, resulting in faster proofs and easier onboarding. Through continuous refactoring, test automation, and packaging improvements, Ethan ensured the codebase remained reliable, maintainable, and adaptable to evolving verification needs.
Overall Statistics
Feature vs Bugs
86%Features
Repository Contributions
2,349Total
Bugs
156
Commits
2,349
Features
974
Lines of code
46,677,439
Activity Months13
Your Network
30 peopleShared Repositories
30
Lottie-uiMember
Aakash KoneruMember
Aakash KoneruMember
Aakash KoneruMember
Ankit KumarMember
Eric McCarthyMember
Cuong ChauMember
David RussinoffMember
Daniil IaitskovMember
Work History
February 2026
84 Commits • 36 Features
Feb 1, 2026February 2026 delivered cross-architecture Axe enhancements, ARM model expansion, and foundational utilities improvements, delivering measurable business value through better reliability, maintainability, and capability. Work spanned ARM model documentation, cross-architecture unroller and lifter improvements, ARM integration tooling, and essential utilities refinements that improve data translation, printing, and rule processing. Notable bug fixes also increased stability for RISC-V PIC handling, executable-parsers error contexts, and ARM examples running without STP.
84 Commits • 36 Features
Feb 1, 2026February 2026 delivered cross-architecture Axe enhancements, ARM model expansion, and foundational utilities improvements, delivering measurable business value through better reliability, maintainability, and capability. Work spanned ARM model documentation, cross-architecture unroller and lifter improvements, ARM integration tooling, and essential utilities refinements that improve data translation, printing, and rule processing. Notable bug fixes also increased stability for RISC-V PIC handling, executable-parsers error contexts, and ARM examples running without STP.
February 2026
January 2026
104 Commits • 56 Features
Jan 1, 2026January 2026 monthly summary for acl2/acl2: Substantial feature delivery, documentation enhancements, and CI/build reliability improvements across the codebase, with a strong emphasis on enabling with-supporters and improving proof performance. Key work spanned Axe and X86, ARM-related development, packaging, and improvement of helper tooling, resulting in clearer APIs and faster, more maintainable builds.
January 2026
104 Commits • 56 Features
Jan 1, 2026January 2026 monthly summary for acl2/acl2: Substantial feature delivery, documentation enhancements, and CI/build reliability improvements across the codebase, with a strong emphasis on enabling with-supporters and improving proof performance. Key work spanned Axe and X86, ARM-related development, packaging, and improvement of helper tooling, resulting in clearer APIs and faster, more maintainable builds.
December 2025
114 Commits • 37 Features
Dec 1, 2025December 2025 (acl2/acl2) monthly summary: Focused on expanding automated verification coverage and maintaining a robust, scalable rule stack across Axe and BV. Key features delivered included: enhanced pseudo-terms and assumption handling in axe/x86 (termp checks, more pseudo-terms, SSE3 support, and loop-lifter refinements); rules and tooling improvements in axe/x86 (new rule, build in two rules, refined rule lists, and enhanced PE tooling); BV support changes and core improvements (split bvminus/bvuminus definitions; BV rule generalization and new transforms; reduced includes); Axe/x86 tester and code quality improvements (simplified tester, clarified implementations, reduced includes, and documentation improvements); and CI/test stabilization (Jenkins script cleanup and deprecation of old machinery with tests re-enabled). Impact: increased verification reliability and coverage, reduced maintenance burden, faster iteration cycles, and easier onboarding. Technologies demonstrated: Lisp-based rule engineering, Axe/BV integration, advanced term manipulation, rule tooling, and CI/test automation.
114 Commits • 37 Features
Dec 1, 2025December 2025 (acl2/acl2) monthly summary: Focused on expanding automated verification coverage and maintaining a robust, scalable rule stack across Axe and BV. Key features delivered included: enhanced pseudo-terms and assumption handling in axe/x86 (termp checks, more pseudo-terms, SSE3 support, and loop-lifter refinements); rules and tooling improvements in axe/x86 (new rule, build in two rules, refined rule lists, and enhanced PE tooling); BV support changes and core improvements (split bvminus/bvuminus definitions; BV rule generalization and new transforms; reduced includes); Axe/x86 tester and code quality improvements (simplified tester, clarified implementations, reduced includes, and documentation improvements); and CI/test stabilization (Jenkins script cleanup and deprecation of old machinery with tests re-enabled). Impact: increased verification reliability and coverage, reduced maintenance burden, faster iteration cycles, and easier onboarding. Technologies demonstrated: Lisp-based rule engineering, Axe/BV integration, advanced term manipulation, rule tooling, and CI/test automation.
December 2025
November 2025
160 Commits • 96 Features
Nov 1, 2025Month: 2025-11 — ACL2 development delivered a focused set of features and reliability fixes across Axe, BV, C2C, and utilities, with a clear business value in safer tooling, improved output clarity, and more robust build/package workflows.
November 2025
160 Commits • 96 Features
Nov 1, 2025Month: 2025-11 — ACL2 development delivered a focused set of features and reliability fixes across Axe, BV, C2C, and utilities, with a clear business value in safer tooling, improved output clarity, and more robust build/package workflows.
October 2025
111 Commits • 56 Features
Oct 1, 2025October 2025 ACL2 monthly summary: Across the acl2/acl2 repository, the team delivered a cohesive set of features, performance improvements, and quality-of-life improvements spanning Axe, parsing, unroller logic, rule coverage, packaging, and documentation. The work collectively increased verification throughput, reduced noise in rule sets, and improved maintainability of the codebase and build process.
111 Commits • 56 Features
Oct 1, 2025October 2025 ACL2 monthly summary: Across the acl2/acl2 repository, the team delivered a cohesive set of features, performance improvements, and quality-of-life improvements spanning Axe, parsing, unroller logic, rule coverage, packaging, and documentation. The work collectively increased verification throughput, reduced noise in rule sets, and improved maintainability of the codebase and build process.
October 2025
September 2025
142 Commits • 53 Features
Sep 1, 2025Month: 2025-09 / acl2/acl2. This period delivered cross-architecture features with a focus on packaging, rule organization, and performance improvements, while tightening documentation and minor fixes for maintainability.
September 2025
142 Commits • 53 Features
Sep 1, 2025Month: 2025-09 / acl2/acl2. This period delivered cross-architecture features with a focus on packaging, rule organization, and performance improvements, while tightening documentation and minor fixes for maintainability.
August 2025
194 Commits • 83 Features
Aug 1, 2025August 2025 ACL2 development focused on reducing build-time dependencies, strengthening verification backends, and laying groundwork for WebAssembly and RISC-V support, while delivering a broad set of rule improvements and memory-model enhancements. The work emphasized business value through faster builds, more robust proofs, greater cross-platform capability, and improved maintainability of the codebase.
194 Commits • 83 Features
Aug 1, 2025August 2025 ACL2 development focused on reducing build-time dependencies, strengthening verification backends, and laying groundwork for WebAssembly and RISC-V support, while delivering a broad set of rule improvements and memory-model enhancements. The work emphasized business value through faster builds, more robust proofs, greater cross-platform capability, and improved maintainability of the codebase.
August 2025
July 2025
262 Commits • 97 Features
Jul 1, 2025July 2025 ACL2 monthly summary: Key features delivered: - Axe/x86 Rule Set Improvements and Tests: built-in rules added, expanded rule coverage, updated rule-lists, ADC example work, compiled examples, and expanded tests including open flag and reserved flag coverage. - BV/Axe Rule Additions and Slice Rules: new BV rules and integration with Axe, including slice-related rules. - Axe/x86 Test and Example Enhancements: expanded test coverage (more NDSU tests), more examples, alphabetized/test organization, and recompile-on-one-machine workflow for reliability. - Documentation Improvements and Build Hygiene: clarified git quick-start references, improved documentation structure, indentation and link quality, and cleanup including trailing whitespace and removal of duplicate rules to simplify maintenance. Major bugs fixed: - Removed duplicate rules across x86 and BV backends, reducing conflicts and maintenance burden. - Sub-OF example in Axe/x86 fixed and now works as intended. - PE64 handling bug fixes and improved PE string tables parsing reliability for x86 tooling. - AleoVM/Axe-x86 typos corrected and related documentation typos cleaned. Overall impact and accomplishments: - Significantly increased rule coverage and reliability across Axe/x86 and BV, enabling safer rule transformations and more robust proofs. - Reduced maintenance friction through hygiene improvements, duplicate removal, and clearer rule-lists. - Expanded test suite with NDSU-backed coverage, boosting regression confidence across releases. - Improved onboarding and developer productivity via clearer documentation and tooling enhancements. Technologies/skills demonstrated: - Deep expertise in Axe/x86, BV integration, and cross-backend rule development; robust memory region machinery and PE/Mach-O/ELF parsing improvements. - Expanded test automation and test organization, including NDSU test integration and Formal Unit Tester enhancements. - Performance-oriented refactoring and code-quality improvements (printing, assumption generation, and rule-lists management). - Strong documentation discipline and cross-team collaboration to streamline maintenance and onboarding.
July 2025
262 Commits • 97 Features
Jul 1, 2025July 2025 ACL2 monthly summary: Key features delivered: - Axe/x86 Rule Set Improvements and Tests: built-in rules added, expanded rule coverage, updated rule-lists, ADC example work, compiled examples, and expanded tests including open flag and reserved flag coverage. - BV/Axe Rule Additions and Slice Rules: new BV rules and integration with Axe, including slice-related rules. - Axe/x86 Test and Example Enhancements: expanded test coverage (more NDSU tests), more examples, alphabetized/test organization, and recompile-on-one-machine workflow for reliability. - Documentation Improvements and Build Hygiene: clarified git quick-start references, improved documentation structure, indentation and link quality, and cleanup including trailing whitespace and removal of duplicate rules to simplify maintenance. Major bugs fixed: - Removed duplicate rules across x86 and BV backends, reducing conflicts and maintenance burden. - Sub-OF example in Axe/x86 fixed and now works as intended. - PE64 handling bug fixes and improved PE string tables parsing reliability for x86 tooling. - AleoVM/Axe-x86 typos corrected and related documentation typos cleaned. Overall impact and accomplishments: - Significantly increased rule coverage and reliability across Axe/x86 and BV, enabling safer rule transformations and more robust proofs. - Reduced maintenance friction through hygiene improvements, duplicate removal, and clearer rule-lists. - Expanded test suite with NDSU-backed coverage, boosting regression confidence across releases. - Improved onboarding and developer productivity via clearer documentation and tooling enhancements. Technologies/skills demonstrated: - Deep expertise in Axe/x86, BV integration, and cross-backend rule development; robust memory region machinery and PE/Mach-O/ELF parsing improvements. - Expanded test automation and test organization, including NDSU test integration and Formal Unit Tester enhancements. - Performance-oriented refactoring and code-quality improvements (printing, assumption generation, and rule-lists management). - Strong documentation discipline and cross-team collaboration to streamline maintenance and onboarding.
June 2025
139 Commits • 54 Features
Jun 1, 2025June 2025 ACL2 development delivered substantial Axe, Axe/x86, and memory/x86 enhancements, strengthening verification reliability, maintainability, and future velocity. The work pairs core feature delivery with targeted bug fixes and quality improvements, enabling more robust proofs and clearer upgrade paths for 32/64-bit architectures.
139 Commits • 54 Features
Jun 1, 2025June 2025 ACL2 development delivered substantial Axe, Axe/x86, and memory/x86 enhancements, strengthening verification reliability, maintainability, and future velocity. The work pairs core feature delivery with targeted bug fixes and quality improvements, enabling more robust proofs and clearer upgrade paths for 32/64-bit architectures.
June 2025
May 2025
147 Commits • 62 Features
May 1, 2025May 2025 ACL2 development: Strengthened verification guarantees and developer experience across utilities, I/O, Axe/X86, SMT integration, and docs. Delivered measurable business value via formal proofs, robust rule sets, and better packaging.
May 2025
147 Commits • 62 Features
May 1, 2025May 2025 ACL2 development: Strengthened verification guarantees and developer experience across utilities, I/O, Axe/X86, SMT integration, and docs. Delivered measurable business value via formal proofs, robust rule sets, and better packaging.
April 2025
199 Commits • 72 Features
Apr 1, 2025April 2025 monthly summary for acl2/acl2: Delivered extensive Axe Core enhancements, targeted bug fixes, and backend refinements across X86, JVM, and BV backends. Core improvements improved printing, equivalence utilities, and pruning standardization; unroller options were expanded and renamed for clarity; BV-lists and lists-light rules were consolidated for maintainability; and a broad set of performance and reliability improvements reduced build friction and boosted proof throughput across platforms.
199 Commits • 72 Features
Apr 1, 2025April 2025 monthly summary for acl2/acl2: Delivered extensive Axe Core enhancements, targeted bug fixes, and backend refinements across X86, JVM, and BV backends. Core improvements improved printing, equivalence utilities, and pruning standardization; unroller options were expanded and renamed for clarity; BV-lists and lists-light rules were consolidated for maintainability; and a broad set of performance and reliability improvements reduced build friction and boosted proof throughput across platforms.
April 2025
March 2025
379 Commits • 157 Features
Mar 1, 2025March 2025 ACL2/ACL2 monthly summary: Strengthened the Axe verification toolkit, expanded BV-lists capabilities, and delivered formal specifications and API improvements, while stabilizing the codebase with targeted bug fixes and documentation enhancements. Key features shipped include clarifications and improvements to Axe rewriter and def-simplified tooling; a new util dag-or-term-to-dag-simple; a formal ChaCha20 specification; expanded BV-lists rules and mappings; and API/tooling refinements such as prove-equality being renamed and public/test interfaces standardized. Notable reliability fixes addressed error contexts, file headers, duplicate rules, and several doc/comment issues. Impact: faster, more reliable proofs; cleaner builds and dependencies; improved maintainability and documentation across modules. Technologies demonstrated: Lisp-based toolchain refinements, formal specification development, BV-rule engineering, cross-module packaging, and documentation improvements.
March 2025
379 Commits • 157 Features
Mar 1, 2025March 2025 ACL2/ACL2 monthly summary: Strengthened the Axe verification toolkit, expanded BV-lists capabilities, and delivered formal specifications and API improvements, while stabilizing the codebase with targeted bug fixes and documentation enhancements. Key features shipped include clarifications and improvements to Axe rewriter and def-simplified tooling; a new util dag-or-term-to-dag-simple; a formal ChaCha20 specification; expanded BV-lists rules and mappings; and API/tooling refinements such as prove-equality being renamed and public/test interfaces standardized. Notable reliability fixes addressed error contexts, file headers, duplicate rules, and several doc/comment issues. Impact: faster, more reliable proofs; cleaner builds and dependencies; improved maintainability and documentation across modules. Technologies demonstrated: Lisp-based toolchain refinements, formal specification development, BV-rule engineering, cross-module packaging, and documentation improvements.
February 2025
314 Commits • 115 Features
Feb 1, 2025February 2025 ACL2 development: delivered major Axe core enhancements and cross-backend improvements in acl2/acl2, focusing on flexible rule management, diagnostics, performance, and build maintainability across Axe and X86 backends. Emphasis on business value through clearer rule behavior, faster evaluation, reduced dependencies, and expanded packaging visibility for easier deployment.
314 Commits • 115 Features
Feb 1, 2025February 2025 ACL2 development: delivered major Axe core enhancements and cross-backend improvements in acl2/acl2, focusing on flexible rule management, diagnostics, performance, and build maintainability across Axe and X86 backends. Emphasis on business value through clearer rule behavior, faster evaluation, reduced dependencies, and expanded packaging visibility for easier deployment.
February 2025
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Quality Metrics
Correctness90.8%
Maintainability89.2%
Architecture86.6%
Performance82.2%
AI Usage20.6%
Skills & Technologies
Programming Languages
ACL2ACL2 LispAssemblyBashCClassCommon LispGit AttributesJSONJava
Technical Skills
x86 ISA ModelingACL2ACL2 DevelopmentACL2 LibraryACL2 ProgrammingACL2 Theorem ProverACL2 Theorem ProvingAPI DesignARM architectureARM programmingAlgorithm DesignAlgorithm DevelopmentAlgorithm ImplementationAlgorithm OptimizationAlgorithm Refinement
Repositories Contributed To
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