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Harrison Nicholls

PROFILE

Harrison Nicholls

Harrison Nicholls led core engineering for the FormingWorlds/PROTEUS repository, delivering robust simulation, configuration, and data management systems for planetary modeling workflows. He architected and maintained Python-based pipelines that integrated atmospheric, interior, and chemistry modules, emphasizing reproducibility and configurability through TOML-driven parameters and automated CI/CD. Harrison refactored code for stability, introduced CLI-driven workflows, and enhanced data visualization and postprocessing, enabling scalable, end-to-end experiments. His work included rigorous testing, documentation, and asset management, with careful attention to error handling and cross-platform compatibility. By leveraging Python, YAML, and shell scripting, he ensured reliable deployments and maintainable, research-grade scientific software.

Overall Statistics

Feature vs Bugs

74%Features

Repository Contributions

955Total
Bugs
119
Commits
955
Features
335
Lines of code
185,844
Activity Months16

Work History

January 2026

9 Commits • 4 Features

Jan 1, 2026

January 2026 highlights for FormingWorlds/PROTEUS focused on reliability, usability, and maintainability of simulation outputs and documentation. Delivered major CHILI post-processing improvements, Aragog integration enhancements, and streamlined documentation workflow, improving data clarity, Python 3.13 compatibility, and deployment efficiency. Notable outcomes include organized grid outputs with duplicate checks, a grid-case logic bug fix with visualization improvements, AragogRunner stability enhancements, MkDocs-based docs deployment, and TOML handling cleanup.

December 2025

21 Commits • 11 Features

Dec 1, 2025

Month 2025-12 summary for FormingWorlds/PROTEUS: Delivered reliability and data-management enhancements, expanded testing, and improved data workflows. Highlights include robust FWL data debugging and output management, improved FWL tree reliability, workflow permissions with failure-driven runs, broader test coverage for failure scenarios, and data-handling enhancements via PROTEUS-based Aragog data fetching and a new interior data retrieval command. These changes improve data integrity, resilience, and maintainability, enabling faster iteration and safer production pipelines.

November 2025

42 Commits • 15 Features

Nov 1, 2025

Concise monthly summary for FormingWorlds/PROTEUS - 2025-11. Highlights include delivery of AGNI upgrade and albedo lookup, substantial code quality and typing improvements, and CI/stability enhancements. The work emphasizes business value: more reliable simulations, better albedo modeling, and scalable config management.

October 2025

59 Commits • 21 Features

Oct 1, 2025

October 2025 (2025-10) monthly summary for FormingWorlds/PROTEUS focusing on stability, configurability, and automation enhancements across core simulation features, CHILI integration, and CI/test infrastructure. The work delivered improves stability, accuracy, and reproducibility of PROTEUS simulations, enabling broader chemistry-enabled runs, more flexible configurations, and scalable pipelines for postprocessing and visualization.

September 2025

14 Commits • 3 Features

Sep 1, 2025

September 2025 — PROTEUS (FormingWorlds): Concise monthly review focusing on business value and technical achievements. Key features delivered: - Test Suite Maintenance and Documentation Improvements: renaming tests for clarity, reorganizing test resources, updating contribution guidelines, and aligning test runner/output paths to improve maintainability and onboarding. Commits include 02ca206cd67449803854c7b215f5f56ad6898e1d, 115225fc43db11278f649b998cfa041c3356de5f, 29ab722a7f7bdf6fdf156ae0456d5858177ed436, 41c4b82530fb2c42ea7eb87bb215e86b77d42bf2, b902e83e99d304ec32daca4ace51689f190d13fe. - L9859d Planetary Grid Simulation Enhancements: updated planet parameters, grid configuration, and scaling options to improve realism and scalability of simulations. Commits include 9822b91bbecc37e2c829279716b5772fe5e25bb2, 798f0a183416828d94ca2030a3f72ab75dbddd66, 551627bf74b46e09f74e57a3333a35d6f64460e8, a2e7517459da87050881281a0ea58e5bea9cf56c. - Code Quality and Robust Module Loading for Optional Components: enable conditional imports for Aragog and Zalmoxis, reorganize imports, and apply style improvements to reduce unnecessary dependencies and improve startup times. Commits include 9a814cbd71367edb43900610a337b481c9ed99d2, 3af073d94326bd77f3cb94d4c134e306c5eae19e9, 3294769cfcbdf5bb2160b191f5fcdae6f34e5814, b2d4e49ce69bdc485d7e70177d8a9fe7f6e6e627. Major bugs fixed: - Atmosphere Escape Calculation Bug Fix: resolves a key error when atmosphere escape calculations were triggered while Aragog/Zalmoxis were not installed, by avoiding imports of those modules and stabilizing related configuration. Demo configuration updated accordingly. Commit: d12d47032489ab57f3fd7c084e9b1de3ce6a9262. Overall impact and accomplishments: - Increased reliability and maintainability of PROTEUS, with safer deployments when optional components are unavailable. - Improved testing hygiene and documentation, enabling faster onboarding and consistent contributions. - Enhanced simulation fidelity and scalability through parameter and grid configuration improvements, aligning outputs closer to observational expectations. Technologies/skills demonstrated: - Python best practices, conditional imports, code style cleanups, test infrastructure modernization, and configuration management.

August 2025

68 Commits • 34 Features

Aug 1, 2025

August 2025 (2025-08) was focused on stabilizing and accelerating PROTEUS workflows through config-driven, end-to-end capabilities and improved observability. Key work included moving inference config to input/, enabling GridPROTEUS/InBO execution from configs via CLI, and consolidating repo hygiene for maintainability. We strengthened testing readiness and plotting workflows to support faster decision-making and robust performance validation across GridPROT, Aragog, and Earth/config components. Overall, these efforts enhanced automation, reliability, and developer productivity while delivering clearer diagnostics and better business value.

July 2025

49 Commits • 16 Features

Jul 1, 2025

July 2025—PROTEUS development focused on improving code quality, documentation, data integrity, and build reliability. Delivered pre-commit tooling and basic test hooks to standardize quality gates; restructured and clarified documentation and model descriptions; implemented robust output path management and codebase refactors to improve reproducibility and configuration safety. Addressed critical bugs in version checking, offline chemistry output, and data parsing, and completed security/compliance updates to meet licensing and policy requirements. These changes reduce onboarding time, improve data integrity, and stabilize the pipeline for consistent scientific results.

June 2025

20 Commits • 2 Features

Jun 1, 2025

June 2025 monthly summary for FormingWorlds/PROTEUS: Delivered robust schematic asset documentation and improved documentation rendering for PROTEUS. Strengthened asset pipeline, improved contributor experience, and removed deprecated assets to ensure reliable documentation display. Focused on asset integrity (ODG/SVG/PNG), updated paths/URLs, fallbacks, and credits, while improving README readability and contributor information.

May 2025

39 Commits • 10 Features

May 1, 2025

Summary for 2025-05 (FormingWorlds/PROTEUS): Delivered significant configurability, reliability, and visualization improvements that enable faster, reproducible experiments and safer deployments. The month focused on refactoring to config-driven parameters, stabilizing plotting, and tightening resource usage, with several dependency and code-quality enhancements to prepare for broader team adoption.

April 2025

167 Commits • 57 Features

Apr 1, 2025

April 2025 monthly summary for FormingWorlds/PROTEUS: Delivered key offline chemistry performance and robustness improvements, expanded configuration capabilities, and strengthened developer tooling and documentation. Implemented offline chemistry improvements and Ruff linting, added missing configuration options, and advanced the Proteus offline chemistry workflow with VULCAN testing and CLI support. Addressed critical stability issues including SPIDER tolerance relaxation limits and safe SPIDER invocation without shell, plus config parsing refinements. Enhanced documentation, examples, and CI/testing to improve onboarding and maintainability. Overall, these efforts improved stability, reduced operational risk, and accelerated experimentation with offline chemistry scenarios, delivering measurable business value and a stronger foundation for future work.

March 2025

60 Commits • 21 Features

Mar 1, 2025

March 2025 PROTEUS monthly summary: Delivered substantial stability, configurability, and validation improvements. The team updated tests, test data, and plots to reflect the new data layout; expanded the configuration subsystem with new options and resume capability; enhanced the escaping model with reservoir-specific behavior and improved stability; strengthened testing infrastructure; and advanced time-stepping robustness, outgas tolerance, and defaults. These changes improved reliability, reproducibility, and modeling flexibility, enabling faster iteration cycles and more accurate simulations.

February 2025

70 Commits • 23 Features

Feb 1, 2025

February 2025 monthly summary for FormingWorlds/PROTEUS: reliability improvements, broader AGNI capabilities, and enhanced visualization and testing that collectively increase data-loading reliability, simulation stability, and developer efficiency. The month delivered concrete feature work, urgent bug fixes, and foundational work enabling commercial-grade configurability and dev-ops readiness.

January 2025

84 Commits • 25 Features

Jan 1, 2025

January 2025 (2025-01) monthly summary for FormingWorlds/PROTEUS. Delivered a focused set of visualization, timing, physics, and reliability improvements that strengthen decision support, simulation stability, and automated workflows. Key outcomes include clearer population plots and updated test data, robust adaptive timestep logic across platforms, deeper tidal-heating and Lovepy integration, and strengthened testing, configuration, and CI practices. These changes improve user interpretability, reduce runtime risks, enable smoother data pipelines, and expand configurable physics capabilities.

December 2024

25 Commits • 10 Features

Dec 1, 2024

December 2024 — FormingWorlds/PROTEUS Overview: Delivered core feature work and reliability improvements that enhance run stability, configurability, and diagnostic capabilities. The month focused on grid robustness, AGNI integration, postprocessing enhancements, and config/documentation maintenance, enabling faster, more reliable experiments and clearer insights for stakeholders. Key features delivered: - Grid improvements: Grid initialization and related enhancements to PROTEUS, improving startup reliability and simulation stability. (commits aa579aa0ef85e59e09cdf756088ccf373b05ac24; 6e72c60bf14240ed73e0e237a0962ab5375944ed) - AGNI integration features: Expanded integrations and config improvements, including initial guesses and parameter handling for AGNI, with optimization and config toggles. (commits 5899d275aabb0ceab1ace27d5b38697772f20135; 193de46293b08b1cbd35267d58c2f01d6056bfc3; 2b096fd8fb2e48fa5d7e5d123f3cdcc9ecf22229; fc95349cbe3ceec0e6681e30827bb2a8665123a1; 1839665429b56b71383eff1de7340d5c828429ec) - Postprocessing improvements: Updates to postproc and Postprocess CFF, with enhancements to postprocessing workflows and new CFF plotting capability. (commits b2b66d96ff696c6f477da62947aa24c9fc49e887; c8c559a749d5fef6781339557a952e42af494663; 11e0fbc8932f1fb67779481bba701f954180b12d) - Config maintenance and reliability: Config-related maintenance commits, including enhancements and fixes, plus tests and documentation updates to improve reliability. (commits 17dd3d64948410af6b58af99044143ec08a4b912; 51dec8e99a30e943d0431610dbf64fa7eb83b5a4; 5cf855c7c50b1e6be006a7b4a33a6fb273f82ac1; f4a98827fc241778d268b84e044c5c66daef8d3d; 0a532d58f937d24d89d917bd32e24ba86a1c2dc8) - Documentation, style, and versioning: Documentation updates, style polish, and a version bump to 24.12.17 to reflect feature completeness and stability improvements. (commits 6cdc73455b56046db067bfcdc8424cc214b8976d; c6f5e8d19c969292c1f77c1b52ac5e4f6850afd0; 0f5763b596560040ad6d3647a43355755d19bb3c; 9b928feaec4671f3691d46eb9036e80c992eb0f3; 0bc798f23bf286d1bfa98d8505d6088d8168c18c; 257d7982b7899c64fd2b65d77e716b02a5e5edbc; 0a532d58f937d24d89d917bd32e24ba86a1c2dc8) - Miscellaneous quality improvements: Style/polish, citation handling improvements, and test updates to align with new data models (p_obs column). (commits 6f...)

November 2024

176 Commits • 68 Features

Nov 1, 2024

2024-11 PROTEUS monthly summary focusing on stabilizing physical runs, expanding validation, and strengthening CI/test infrastructure to deliver reliable physics results and faster feedback to the team. Key features delivered: - Clarify PETSc step in workflow (commit 8ce17d8f2ae0f93521cfca896b3da23c22c60093) - Basic physical test structure (commit a99d0f4491cf54dde8bf59a2ad801e4394008dc8) - Physical integration runs OK and stabilized runs (commit 4f27f94b737156f2b5c9a1eba2665b45e4894f06) - Compare atmosphere output arrays and validate by reading extra keys from atmosphere NetCDF (commits 875218b2932379626f8b3e74dadf9845cd3454b9; 4fe0fad5d671ecbcf68658be3f7f3c152de6aa0d) - Physical tests pass and test data reorganized to test plots from physical run (commits b42623a388fa1e08db2eeebd2f7becdaaa6c3579; 17e2fedb44861d4bd434d434e32d34aa4c1ad258) CI/QA improvements: - Linting across codebase (commit 893d2ea39aa85cbdda32280b853f4f9204199a7f) - Added NetCDF to CI workflow (commit c59507a926ade3b0d900edae54ac8da5029d40e6) - Aragog integration and workflow updates (commits 4795b0dad75cd952cae1070272ddb63c43c74591; 47871d428a8a57d7677014ea99eb7f743b961394) - MacOS runner with gfortran (commit 4ecdbe41c5e4e31345212553e7e08a2927b7822b) - RAD_DIR support and diagnostics in CI (commits 7b62685d71b26965d91658132ca86253c1b28aff; 5e65cfcbb49ac40e8120d28da87445aed796a59e); multiple entries including print RAD_DIR contents (commits 11d72271507f3135111dd3bb75f8aa6c467289fa; 84a4a5b304233cdee7359805333ad697bdc181c0; 2acab7d4fba42f6977d015dbb8db95598730dd51) - CI workflow sequencing: Checkout PROTEUS before SOCRATES (commit b4242a7627b82904225f68f07e90aaf30b2f4793) - Caching for CI/tests (commit 2bb055bcd24010962bb99a911c8875e6d37e01ce) - Proteus cache fix and linting in CI (commits 3c43c5ff4b59c5e341b6e37447e1eba53b8cbc57; 982d0216b062d92506b807624de8d3c5c689ab32) Overlap/config and physics fidelity enhancements: - Overlap configuration enhancements and standardization; new options and docs; align with JANUS/AGNI; updated configs (commits 544ea234796739f10d180a65ee204851e0b52814; 325dd2f5daf37dcd7c8334ee47dc20f2f07b2424; 1dc7ca5b688f9bb5abb9a046bcbc69dca618f81c; 492d73912da4abb42be6ae48dae53d9db6a26af7; 66766c4231a2099166cae7ac3e2d5d900184eb64) - Remove deprecated core_radius keyword and update melt_fraction usage (commit d22078462d3bd1ecc342be15dcb04a9879f5175b) - Orbit data modeling groundwork (commit ef43c4971f872094f3546e01f47c04c6304a4968; 96549e1e482e6e418993de764fac2592329375f4) - RAID: Radiogenic heating and tidal constants integration in Aragog/SPIDER and plotting updates (commits 0bdb7aaa83a46b90265affe6b675c77e4183ca05; ea5f24a600c4dff81146daa567932ff9f3e315e0; f51eb0269851c7cc44bc26f18291f33790b0331e) Bug fixes: - Do not manipulate modern spectrum when using Dummy star (5023b0b733e6a43a0566d781e8c17d3a0f71e9a6) - Fix sflux plotting for Dummy star (72e20dca145fe030f03cb1ec8a640224ef5fa4f9) - F_atm_lim undefined bug when prevent_warming is False (b26d5596871f9c1dff237d1413c7682a37f88f64) - Address remaining plot xpassing in physical tests (d749c9231dd5cea6d100ae74398bd460c2802332) Overall impact: - More reliable physics pipelines, robust test coverage, and faster feedback cycles through caching and enhanced CI. Stronger data validation and plotting infrastructure underpin more credible decision-making for model development and deployment. Technologies/skills demonstrated: - Python, NetCDF data handling, data validation, plotting, CI/CD with GitHub Actions, test automation, Aragog/SPIDER/AGNI integrations, and configuration management.

October 2024

52 Commits • 15 Features

Oct 1, 2024

Month 2024-10 summary for FormingWorlds/PROTEUS: Delivered a broad set of quality, configuration, and visualization improvements that enhance reliability, configurability, and business value. The work includes extensive code quality and linting drive, enhanced data I/O and plotting capabilities, and a major configuration and defaults overhaul. A number of targeted bug fixes improved stability in plotting, testing, and parameter handling.

Activity

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Quality Metrics

Correctness86.4%
Maintainability87.0%
Architecture82.4%
Performance77.2%
AI Usage20.6%

Skills & Technologies

Programming Languages

BashBinaryCSVGit configurationGitattributesJSONJavaScriptJuliaLogMarkdown

Technical Skills

API DevelopmentAPI IntegrationAPI InteractionAPI TestingAPI integrationArchivingAsset ManagementAstrophysicsAstrophysics SimulationAtmospheric ChemistryAtmospheric Chemistry ModelingAtmospheric Chemistry SimulationAtmospheric Escape ModelingAtmospheric ModelingAtmospheric Physics

Repositories Contributed To

1 repo

Overview of all repositories you've contributed to across your timeline

FormingWorlds/PROTEUS

Oct 2024 Jan 2026
16 Months active

Languages Used

CSVJuliaLogMarkdownPythonShellTOMLpython

Technical Skills

Astrophysics SimulationAtmospheric ModelingBuild AutomationBuild ManagementCI/CDCode Cleanup

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