herbie-fp/herbie
Oct 2025 – May 2026
5 Months active
Languages Used
RacketFPCoreLispSchemeRustbashjson
Technical Skills
arithmetic operationscode refactoringfunctional programmingalgorithm designalgorithm developmentgeospatial analysis
Jonas Regehr
PROFILE
Jonas Regehr
Worked on the herbie-fp/herbie repository, delivering features that advanced mathematical modeling, geospatial analysis, and symbolic computation. Developed new arithmetic and geospatial rules, expanded projection support, and enhanced debugging by enabling intermediate expression dumps. Improved analytics by augmenting results.json with alternative expressions, scores, and costs, supporting better decision-making. Focused on code quality through targeted refactoring, formatting cleanups, and maintenance of build reliability. Leveraged Racket, Rust, and JSON handling to implement robust backend features, streamline data processing, and ensure traceable, auditable changes. Prioritized functional programming principles and continuous integration to deliver reliable, extensible solutions for floating-point and geospatial workloads.
Overall Statistics
Feature vs Bugs
91%Features
Repository Contributions
23Total
Bugs
1
Commits
23
Features
10
Lines of code
74,335
Activity Months5
Your Network
14 peopleShared Repositories
14
Work History
May 2026
1 Commits • 1 Features
May 1, 2026May 2026 — Delivered a focused feature in herbie (herbie-fp/herbie) to enhance results.json by including alternative expressions with their scores and costs. This extends analytics coverage, enabling side-by-side comparison of all alternatives and improving decision support for stakeholders. No major bugs were fixed this month. Key impact includes richer analytical surfaces, improved traceability through explicit alt data in the output, and a stronger foundation for future expansions. Technologies demonstrated include JSON output augmentation, data modeling alignment with the existing results schema, and disciplined version control with clear commit messages.
1 Commits • 1 Features
May 1, 2026May 2026 — Delivered a focused feature in herbie (herbie-fp/herbie) to enhance results.json by including alternative expressions with their scores and costs. This extends analytics coverage, enabling side-by-side comparison of all alternatives and improving decision support for stakeholders. No major bugs were fixed this month. Key impact includes richer analytical surfaces, improved traceability through explicit alt data in the output, and a stronger foundation for future expansions. Technologies demonstrated include JSON output augmentation, data modeling alignment with the existing results schema, and disciplined version control with clear commit messages.
May 2026
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.
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.
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.
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
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.
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.
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.
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
Activity
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Quality Metrics
Correctness93.0%
Maintainability88.8%
Architecture90.4%
Performance87.8%
AI Usage23.4%
Skills & Technologies
Programming Languages
FPCoreLispRacketRustSchemebashjson
Technical Skills
API developmentBenchmarkingContinuous IntegrationJSON handlingRacketRacket programmingRustTestingalgorithm designalgorithm developmentarithmetic operationsbackend developmentbash scriptingbuild automationcode formatting
Repositories Contributed To
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