herbie-fp/herbie
Oct 2025 – Apr 2026
4 Months active
Languages Used
RacketFPCoreLispSchemeRustbashjson
Technical Skills
arithmetic operationscode refactoringfunctional programmingalgorithm designalgorithm developmentgeospatial analysis
Jonas Regehr
PROFILE
Jonas Regehr
Jo contributed to the herbie-fp/herbie repository by developing features that expanded mathematical modeling and geospatial analysis capabilities. Over four months, Jo implemented new arithmetic and symbolic rules, enhanced geospatial transformations, and improved the reliability of rule processing and reporting. Using Racket, Rust, and JSON, Jo introduced forward and inverse geospatial projections, refined the testing framework, and automated build and reporting processes. The work included code refactoring, debugging, and maintenance, resulting in more accurate computations, streamlined code quality, and safer deployments. Jo’s engineering approach emphasized functional programming, algorithm design, and robust data processing to support broader and more reliable analysis.
Overall Statistics
Feature vs Bugs
90%Features
Repository Contributions
22Total
Bugs
1
Commits
22
Features
9
Lines of code
74,327
Activity Months4
Your Network
14 peopleShared Repositories
14
Work History
April 2026
11 Commits • 3 Features
Apr 1, 2026April 2026 highlights for repository herbie-fp/herbie: Delivered substantial improvements in rule processing visibility and reliability, with enhancements to runtime rule counting and reporting, safer multi-directory aggregation into JSON reports, and an integrity revert to preserve correctness. Cleaned and stabilized the rule set by removing problematic rules and reclassifying erf rules to 'special'. Improved code quality and build reliability through formatting cleanups and a corrected Makefile path. These changes collectively increase trust in metrics, simplify reporting, and reduce build-related risk for faster, safer deployments.
11 Commits • 3 Features
Apr 1, 2026April 2026 highlights for repository herbie-fp/herbie: Delivered substantial improvements in rule processing visibility and reliability, with enhancements to runtime rule counting and reporting, safer multi-directory aggregation into JSON reports, and an integrity revert to preserve correctness. Cleaned and stabilized the rule set by removing problematic rules and reclassifying erf rules to 'special'. Improved code quality and build reliability through formatting cleanups and a corrected Makefile path. These changes collectively increase trust in metrics, simplify reporting, and reduce build-related risk for faster, safer deployments.
April 2026
March 2026
4 Commits • 3 Features
Mar 1, 2026March 2026 (repository: herbie-fp/herbie) delivered three core features advancing debugging, testing, and symbolic computation, while strengthening testing infrastructure and benchmarks. No major bugs were reported; efforts focused on feature delivery, code quality, and reliability improvements. The work enhances debugging visibility, FP evaluation robustness, and mathematical expressiveness, enabling more reliable analysis and broader symbolic capabilities across floating-point workloads.
March 2026
4 Commits • 3 Features
Mar 1, 2026March 2026 (repository: herbie-fp/herbie) delivered three core features advancing debugging, testing, and symbolic computation, while strengthening testing infrastructure and benchmarks. No major bugs were reported; efforts focused on feature delivery, code quality, and reliability improvements. The work enhances debugging visibility, FP evaluation robustness, and mathematical expressiveness, enabling more reliable analysis and broader symbolic capabilities across floating-point workloads.
November 2025
6 Commits • 2 Features
Nov 1, 2025Monthly summary for 2025-11: Implemented broader geospatial capabilities and strengthened code health in the herbie repository. Delivered forward/inverse geospatial transformations and a new FPCore function pj_tsfn; introduced Krovak and SOM projections with improvements to tmerc/omerc for increased accuracy and broader regional coverage. Performed targeted code quality work by removing outdated FPCore definitions, eliminating duplicates, and modernizing syntax. These changes enable more accurate, faster geospatial analysis for customers, expand projection support, and reduce maintenance risk.
6 Commits • 2 Features
Nov 1, 2025Monthly summary for 2025-11: Implemented broader geospatial capabilities and strengthened code health in the herbie repository. Delivered forward/inverse geospatial transformations and a new FPCore function pj_tsfn; introduced Krovak and SOM projections with improvements to tmerc/omerc for increased accuracy and broader regional coverage. Performed targeted code quality work by removing outdated FPCore definitions, eliminating duplicates, and modernizing syntax. These changes enable more accurate, faster geospatial analysis for customers, expand projection support, and reduce maintenance risk.
November 2025
October 2025
1 Commits • 1 Features
Oct 1, 2025October 2025 — Delivered an Arithmetic Rules Enhancement: 1-split in the Herbie rule engine (repo: herbie-fp/herbie). Implemented a new '1-split' rule to improve arithmetic operation flexibility and modeling accuracy. Commit: 16e6a4ac8aa5095c6b818172ad582bfa6f1ea909 ('Add 1-split'). Impact: reduces workaround code, enables more precise numeric expressions, and supports upcoming rule-coverage roadmap. No major bugs fixed this month; maintenance and QA continue in feature-driven iterations. Technologies/skills demonstrated: rule-based engine enhancement, incremental feature delivery, Git traceability, cross-repo collaboration.
October 2025
1 Commits • 1 Features
Oct 1, 2025October 2025 — Delivered an Arithmetic Rules Enhancement: 1-split in the Herbie rule engine (repo: herbie-fp/herbie). Implemented a new '1-split' rule to improve arithmetic operation flexibility and modeling accuracy. Commit: 16e6a4ac8aa5095c6b818172ad582bfa6f1ea909 ('Add 1-split'). Impact: reduces workaround code, enables more precise numeric expressions, and supports upcoming rule-coverage roadmap. No major bugs fixed this month; maintenance and QA continue in feature-driven iterations. Technologies/skills demonstrated: rule-based engine enhancement, incremental feature delivery, Git traceability, cross-repo collaboration.
Activity
Loading activity data...
Quality Metrics
Correctness93.6%
Maintainability89.2%
Architecture91.0%
Performance88.2%
AI Usage22.8%
Skills & Technologies
Programming Languages
FPCoreLispRacketRustSchemebashjson
Technical Skills
BenchmarkingContinuous IntegrationJSON handlingRacketRacket programmingRustTestingalgorithm designalgorithm developmentarithmetic operationsbackend developmentbash scriptingbuild automationcode formattingcode refactoring
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline