openfisca/openfisca-france
Nov 2024 – Apr 2026
11 Months active
Languages Used
MarkdownPythonTOMLYAMLyaml
Technical Skills
Backend DevelopmentChangelog ManagementCode CleanupCode LintingCode MaintenanceCode Refactoring
b-michaud
PROFILE
B-michaud
Benoît Michaud developed and maintained core socio-fiscal calculation features for the openfisca/openfisca-france repository, focusing on regulatory alignment and maintainability. He implemented updates to tax, social benefit, and unemployment insurance logic, refactored parameter structures, and streamlined YAML-based configuration management. Using Python and YAML, Benoît improved code readability, optimized formulas, and enhanced test coverage to ensure accuracy and compliance with evolving French legislation. His work included direct linking of legislative references, release documentation, and rollback of AI-generated parameter drift, resulting in a robust, traceable codebase. The depth of his contributions supported reliable, policy-compliant releases and faster adaptation to regulatory changes.
Overall Statistics
Feature vs Bugs
55%Features
Repository Contributions
175Total
Bugs
33
Commits
175
Features
40
Lines of code
8,809
Activity Months11
Your Network
28 peopleShared Repositories
28
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Work History
April 2026
9 Commits • 1 Features
Apr 1, 2026April 2026 monthly summary for openfisca/openfisca-france: Delivered OpenFisca-France 2026 social benefits parameter updates aligned with April 1, 2026 changes and OpenFisca-France 175.0.28. Updated parameters for RSA, Prime d’activité, AAH, unemployment benefits, AER, ATA, family allowances; included release metadata and BMAF reference fix. Version bump to 175.0.28. Maintained alignment with regulatory changes and release readiness.
9 Commits • 1 Features
Apr 1, 2026April 2026 monthly summary for openfisca/openfisca-france: Delivered OpenFisca-France 2026 social benefits parameter updates aligned with April 1, 2026 changes and OpenFisca-France 175.0.28. Updated parameters for RSA, Prime d’activité, AAH, unemployment benefits, AER, ATA, family allowances; included release metadata and BMAF reference fix. Version bump to 175.0.28. Maintained alignment with regulatory changes and release readiness.
April 2026
January 2026
9 Commits • 2 Features
Jan 1, 2026January 2026 focused on regulatory compliance, code hygiene, and user-facing release documentation for OpenFisca France. Implemented 2026 social contributions reductions updates, integrated LFSS 2025 Article 18 references, updated RGDU indexing and last_value_still_valid_on logic, adjusted t_delta after plaf changes, and published 175.0.0 socio-fiscal release notes. Enhanced test coverage and code quality through targeted fixes and linting, delivering a stable, compliant, and well-documented release for French social contributions calculations.
January 2026
9 Commits • 2 Features
Jan 1, 2026January 2026 focused on regulatory compliance, code hygiene, and user-facing release documentation for OpenFisca France. Implemented 2026 social contributions reductions updates, integrated LFSS 2025 Article 18 references, updated RGDU indexing and last_value_still_valid_on logic, adjusted t_delta after plaf changes, and published 175.0.0 socio-fiscal release notes. Enhanced test coverage and code quality through targeted fixes and linting, delivering a stable, compliant, and well-documented release for French social contributions calculations.
September 2025
11 Commits • 2 Features
Sep 1, 2025September 2025 performance summary for openfisca/openfisca-france: Implemented major policy reductions in social contributions and updated the end-date policy for health and family contributions in 2026. Updated tests and maintained high code quality, aligning the codebase with evolving regulatory requirements and preparing for 2026 rollout.
11 Commits • 2 Features
Sep 1, 2025September 2025 performance summary for openfisca/openfisca-france: Implemented major policy reductions in social contributions and updated the end-date policy for health and family contributions in 2026. Updated tests and maintained high code quality, aligning the codebase with evolving regulatory requirements and preparing for 2026 rollout.
September 2025
July 2025
8 Commits • 1 Features
Jul 1, 2025July 2025 monthly summary for openfisca/openfisca-france. Delivered regulatory updates for 2025 (Prime d’activité calculation/thresholds, unemployment insurance rate/parameters, last valid date for unemployment contributions, and social contribution reductions configuration) in release 172.0.5, along with comprehensive code quality improvements. Documentation enhancements also added to explain the T coefficient in the allegement in the docs.
July 2025
8 Commits • 1 Features
Jul 1, 2025July 2025 monthly summary for openfisca/openfisca-france. Delivered regulatory updates for 2025 (Prime d’activité calculation/thresholds, unemployment insurance rate/parameters, last valid date for unemployment contributions, and social contribution reductions configuration) in release 172.0.5, along with comprehensive code quality improvements. Documentation enhancements also added to explain the T coefficient in the allegement in the docs.
June 2025
2 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for the openfisca/openfisca-france repository. Focused on aligning Prime d'activité parameters with regulatory changes and simplifying the ppa_fictive calculation to improve maintainability and future adaptability.
2 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for the openfisca/openfisca-france repository. Focused on aligning Prime d'activité parameters with regulatory changes and simplifying the ppa_fictive calculation to improve maintainability and future adaptability.
June 2025
April 2025
38 Commits • 9 Features
Apr 1, 2025April 2025: Delivered core features and critical fixes in openfisca/openfisca-france, with a focus on regulatory accuracy, data integrity, and user-facing clarity. Implemented direct linking of legislative references to articles, refined UI labels, added unit specification (cm2), and extended CRDs with new calculation outputs. Completed lint and reference fixes to stabilize the release and prepared for deployment with version bumps.
April 2025
38 Commits • 9 Features
Apr 1, 2025April 2025: Delivered core features and critical fixes in openfisca/openfisca-france, with a focus on regulatory accuracy, data integrity, and user-facing clarity. Implemented direct linking of legislative references to articles, refined UI labels, added unit specification (cm2), and extended CRDs with new calculation outputs. Completed lint and reference fixes to stabilize the release and prepared for deployment with version bumps.
March 2025
12 Commits • 2 Features
Mar 1, 2025March 2025 monthly summary for openfisca/openfisca-france: Key improvements to Housing Benefits parameterization and calculation, delivering a more maintainable, accurate, and scalable configuration foundation. Overhauled parameter structure, fixed YAML indexing, and expanded calculation configuration (APL accession, student resources) with updated historical data, enabling more reliable parameter resolution and faster feature delivery.
12 Commits • 2 Features
Mar 1, 2025March 2025 monthly summary for openfisca/openfisca-france: Key improvements to Housing Benefits parameterization and calculation, delivering a more maintainable, accurate, and scalable configuration foundation. Overhauled parameter structure, fixed YAML indexing, and expanded calculation configuration (APL accession, student resources) with updated historical data, enabling more reliable parameter resolution and faster feature delivery.
March 2025
February 2025
8 Commits • 2 Features
Feb 1, 2025February 2025 — OpenFisca France (openfisca/openfisca-france) monthly summary Key features delivered: - Family allowance modulation date alignment: synchronized last_value_still_valid_on for modulateurs (taux_tranche_1/2/3), updated related YAML/date fields, and performed a minor release changelog/version bump. - CRDS on family allowances calculation enhancement: added calculate_output attribute to crds_af and updated the model; changelog and version bumped. Major bugs fixed: - Reverted AI-generated or unintended parameter/date changes across housing benefits configurations (tf dom 7 enfants, LLM parameter N for AL, and al_plaf_acc), restoring known-good baselines. Overall impact and accomplishments: - Improved accuracy and traceability of family allowance and CRDS computations; reduced drift risk from AI-driven changes; clearer release notes and maintainability via updated YAML/date handling and versioning. Technologies/skills demonstrated: - Domain modeling for benefits, YAML/data synchronization, versioning and changelog processes, release coordination, risk mitigation via parameter rollback; multilingual commit hygiene. Business value: - Higher reliability of family benefits calculations, regulatory-compliant parameterization, and faster incident resolution with traceable changes.
February 2025
8 Commits • 2 Features
Feb 1, 2025February 2025 — OpenFisca France (openfisca/openfisca-france) monthly summary Key features delivered: - Family allowance modulation date alignment: synchronized last_value_still_valid_on for modulateurs (taux_tranche_1/2/3), updated related YAML/date fields, and performed a minor release changelog/version bump. - CRDS on family allowances calculation enhancement: added calculate_output attribute to crds_af and updated the model; changelog and version bumped. Major bugs fixed: - Reverted AI-generated or unintended parameter/date changes across housing benefits configurations (tf dom 7 enfants, LLM parameter N for AL, and al_plaf_acc), restoring known-good baselines. Overall impact and accomplishments: - Improved accuracy and traceability of family allowance and CRDS computations; reduced drift risk from AI-driven changes; clearer release notes and maintainability via updated YAML/date handling and versioning. Technologies/skills demonstrated: - Domain modeling for benefits, YAML/data synchronization, versioning and changelog processes, release coordination, risk mitigation via parameter rollback; multilingual commit hygiene. Business value: - Higher reliability of family benefits calculations, regulatory-compliant parameterization, and faster incident resolution with traceable changes.
January 2025
21 Commits • 4 Features
Jan 1, 2025January 2025 monthly summary for openfisca/openfisca-france focusing on delivering regulatory-aligned financial calculations, robust test coverage, and maintainable releases. Highlights include core PFU sign handling updates, targeted test-suite stabilization, and preparatory release maintenance that together improve accuracy, compliance, and developer velocity.
21 Commits • 4 Features
Jan 1, 2025January 2025 monthly summary for openfisca/openfisca-france focusing on delivering regulatory-aligned financial calculations, robust test coverage, and maintainable releases. Highlights include core PFU sign handling updates, targeted test-suite stabilization, and preparatory release maintenance that together improve accuracy, compliance, and developer velocity.
January 2025
December 2024
34 Commits • 13 Features
Dec 1, 2024Month: 2024-12 — This period focused on stabilizing policy logic, standardizing code quality, and preparing for repeatable releases. Key outcomes include Sofica subscription refinements, naming and folder convention standardization, and enhanced tax/refund condition handling, underpinned by targeted linting and metadata updates.
December 2024
34 Commits • 13 Features
Dec 1, 2024Month: 2024-12 — This period focused on stabilizing policy logic, standardizing code quality, and preparing for repeatable releases. Key outcomes include Sofica subscription refinements, naming and folder convention standardization, and enhanced tax/refund condition handling, underpinned by targeted linting and metadata updates.
November 2024
23 Commits • 3 Features
Nov 1, 2024November 2024: Consolidated tax credits and reductions rule updates, configuration reliability improvements, and release readiness for Batch 1 2024-11 in openfisca/openfisca-france. Business value focused on accuracy, maintainability, and timely deployment.
23 Commits • 3 Features
Nov 1, 2024November 2024: Consolidated tax credits and reductions rule updates, configuration reliability improvements, and release readiness for Batch 1 2024-11 in openfisca/openfisca-france. Business value focused on accuracy, maintainability, and timely deployment.
November 2024
Activity
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Quality Metrics
Correctness94.8%
Maintainability94.8%
Architecture93.0%
Performance91.0%
AI Usage20.2%
Skills & Technologies
Programming Languages
MarkdownPythonTOMLYAMLyaml
Technical Skills
Backend DevelopmentBenefit CalculationCI/CDChangelog ManagementCode CleanupCode FormattingCode LintingCode MaintenanceCode OptimizationCode OrganizationCode ReadabilityCode RefactoringConfigurationConfiguration ManagementData Management
Repositories Contributed To
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