Jij-Inc/ommx
Nov 2024 – Nov 2025
13 Months active
Languages Used
C++MarkdownProtocol BuffersPythonRustShellTOMLYAML
Technical Skills
API DesignAPI DevelopmentAlgorithm OptimizationArtifact ManagementCI/CDCLI Development
Toshiki Teramura
PROFILE
Toshiki Teramura
Toshiki Teramura led the engineering and evolution of the Jij-Inc/ommx optimization SDK, building robust cross-language APIs and artifact-driven workflows for mathematical modeling and solver integration. He architected and implemented features such as QUBO/PUBO conversion, constraint propagation, and artifact registry management, using Python and Rust with PyO3 bindings to ensure seamless interoperability. His work included modularizing constraint handling, introducing memory profiling, and expanding support for WebAssembly and CI/CD automation. By focusing on API usability, performance, and reproducibility, Toshiki delivered a maintainable, extensible codebase that improved developer onboarding, artifact management, and optimization workflow reliability across diverse deployment environments.
Overall Statistics
Feature vs Bugs
78%Features
Repository Contributions
240Total
Bugs
29
Commits
240
Features
104
Lines of code
110,071
Activity Months13
Your Network
9 people
Work History
November 2025
13 Commits • 6 Features
Nov 1, 2025November 2025 (Jij-Inc/ommx): Delivered a focused set of features and stability improvements that broaden API usability, strengthen optimization workflows, and extend platform reach while preserving release reliability. Key business value includes a Python-facing Rust artifact registry API for easier integration, robust constraint evaluation with infeasibility handling, richer decision-variable analytics, proactive platform support (Python versions and WebAssembly), and performance instrumentation through a memory profiler.
13 Commits • 6 Features
Nov 1, 2025November 2025 (Jij-Inc/ommx): Delivered a focused set of features and stability improvements that broaden API usability, strengthen optimization workflows, and extend platform reach while preserving release reliability. Key business value includes a Python-facing Rust artifact registry API for easier integration, robust constraint evaluation with infeasibility handling, richer decision-variable analytics, proactive platform support (Python versions and WebAssembly), and performance instrumentation through a memory profiler.
November 2025
October 2025
4 Commits • 3 Features
Oct 1, 2025Month: 2025-10 — Consolidated feature delivery and reliability improvements for Jij-Inc/ommx. Focused on onboarding, observability, and secure CI. Delivered practical Rust SDK examples (QUBO construction and dependent variables) to demonstrate modeling patterns and accelerate user onboarding. Introduced Instance.stats() across Rust and Python SDKs to provide actionable metrics for decision variables and constraints, enabling better debugging, reporting, and reproducibility of optimization snapshots. Enhanced CI/CD workflows by switching PR creation to a GitHub App token, improving security and reliability of automated workflows.
October 2025
4 Commits • 3 Features
Oct 1, 2025Month: 2025-10 — Consolidated feature delivery and reliability improvements for Jij-Inc/ommx. Focused on onboarding, observability, and secure CI. Delivered practical Rust SDK examples (QUBO construction and dependent variables) to demonstrate modeling patterns and accelerate user onboarding. Introduced Instance.stats() across Rust and Python SDKs to provide actionable metrics for decision variables and constraints, enabling better debugging, reporting, and reproducibility of optimization snapshots. Enhanced CI/CD workflows by switching PR creation to a GitHub App token, improving security and reliability of automated workflows.
September 2025
2 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary: Delivered Python API surface expansion for the local registry and artifact management in Jij-Inc/ommx. Exposed Python-accessible APIs to manage the local registry root (set_local_registry_root/get_local_registry_root) and added aliases for local registry APIs under the ommx.artifact module (e.g., get_image_dir). These changes streamline artifact image management, improve automation readiness, and foster consistent workflows across CI/CD pipelines, enhancing developer productivity and deployment reliability.
2 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary: Delivered Python API surface expansion for the local registry and artifact management in Jij-Inc/ommx. Exposed Python-accessible APIs to manage the local registry root (set_local_registry_root/get_local_registry_root) and added aliases for local registry APIs under the ommx.artifact module (e.g., get_image_dir). These changes streamline artifact image management, improve automation readiness, and foster consistent workflows across CI/CD pipelines, enhancing developer productivity and deployment reliability.
September 2025
August 2025
4 Commits • 2 Features
Aug 1, 2025Monthly work summary for 2025-08 focusing on delivering robustness, configurability, and maintainability for Jij-Inc/ommx. This period emphasized modularizing constraint handling, enabling automatic variable fixing during partial evaluation, introducing configurable tolerance management, and cleaning up dependency configuration to reduce maintenance overhead. The changes lay groundwork for faster solves, more predictable behavior, and smoother future enhancements in the solver and Python integrations.
August 2025
4 Commits • 2 Features
Aug 1, 2025Monthly work summary for 2025-08 focusing on delivering robustness, configurability, and maintainability for Jij-Inc/ommx. This period emphasized modularizing constraint handling, enabling automatic variable fixing during partial evaluation, introducing configurable tolerance management, and cleaning up dependency configuration to reduce maintenance overhead. The changes lay groundwork for faster solves, more predictable behavior, and smoother future enhancements in the solver and Python integrations.
July 2025
30 Commits • 13 Features
Jul 1, 2025July 2025 (2025-07) performance-focused monthly summary for Jij-Inc/ommx. Delivered the Python SDK 2.0.0 release with notes and optimizations; integrated DecisionVariable substitutions with pandas retrieval; enabled value-based ordering for Bound; advanced Rust SDK RC with core trait implementations, I/O enhancements, and ConstraintHints restoration; completed Rust SDK and ParametricInstance improvements with idiomatic ParametricInstance, tutorials, and expression-supporting macros; strengthened release engineering and CI/CD with trusted publish, Dependabot updates for uv, explicit GitHub Actions permissions, uv.lock upgrades, and benchmarking for direct TSP QUBO generation. Result: faster time-to-value for customers, more reliable and analyzable data, and a more secure, maintainable release process.
30 Commits • 13 Features
Jul 1, 2025July 2025 (2025-07) performance-focused monthly summary for Jij-Inc/ommx. Delivered the Python SDK 2.0.0 release with notes and optimizations; integrated DecisionVariable substitutions with pandas retrieval; enabled value-based ordering for Bound; advanced Rust SDK RC with core trait implementations, I/O enhancements, and ConstraintHints restoration; completed Rust SDK and ParametricInstance improvements with idiomatic ParametricInstance, tutorials, and expression-supporting macros; strengthened release engineering and CI/CD with trusted publish, Dependabot updates for uv, explicit GitHub Actions permissions, uv.lock upgrades, and benchmarking for direct TSP QUBO generation. Result: faster time-to-value for customers, more reliable and analyzable data, and a more secure, maintainable release process.
July 2025
June 2025
31 Commits • 8 Features
Jun 1, 2025June 2025 monthly summary for Jij-Inc/ommx. Focused on delivering cross-language interop, API modernization, and developer tooling to accelerate business value and ensure robust, user-friendly SDKs. Substantial Rust-Python integration and documentation improvements underpin product reliability and time-to-market for client integrations.
June 2025
31 Commits • 8 Features
Jun 1, 2025June 2025 monthly summary for Jij-Inc/ommx. Focused on delivering cross-language interop, API modernization, and developer tooling to accelerate business value and ensure robust, user-friendly SDKs. Substantial Rust-Python integration and documentation improvements underpin product reliability and time-to-market for client integrations.
May 2025
26 Commits • 12 Features
May 1, 2025May 2025 highlights for Jij-Inc/ommx focused on strengthening the evaluation engine, improving determinism and performance, and completing core refactors to position the project for 2.0 SDK readiness. The work delivered broader support for evaluation across Function, PolynomialBase, Constraint, and Instance, while laying the groundwork for easier maintenance and more predictable behavior in production.
26 Commits • 12 Features
May 1, 2025May 2025 highlights for Jij-Inc/ommx focused on strengthening the evaluation engine, improving determinism and performance, and completing core refactors to position the project for 2.0 SDK readiness. The work delivered broader support for evaluation across Function, PolynomialBase, Constraint, and Instance, while laying the groundwork for easier maintenance and more predictable behavior in production.
May 2025
April 2025
14 Commits • 6 Features
Apr 1, 2025April 2025 was focused on strengthening model fidelity, performance, and developer productivity across Jij-Inc/ommx. Key work spanned robust QUBO modeling, evaluation improvements, Rust-based linear/polynomial representations, benchmarking/CI enhancements, and documentation/dependency alignment. The combination of fixes, refactors, and performance gains reduced risk in production deployments and accelerated iteration cycles for complex optimization workloads.
April 2025
14 Commits • 6 Features
Apr 1, 2025April 2025 was focused on strengthening model fidelity, performance, and developer productivity across Jij-Inc/ommx. Key work spanned robust QUBO modeling, evaluation improvements, Rust-based linear/polynomial representations, benchmarking/CI enhancements, and documentation/dependency alignment. The combination of fixes, refactors, and performance gains reduced risk in production deployments and accelerated iteration cycles for complex optimization workloads.
March 2025
20 Commits • 7 Features
Mar 1, 2025March 2025 summary for Jij-Inc/ommx focusing on delivering core optimization capabilities, improving interoperability with OpenJij, and strengthening CI/test reliability. Key features and improvements were shipped with clear business value: enhanced modeling flexibility, better solution quality, and faster onboarding for customers and partners.
20 Commits • 7 Features
Mar 1, 2025March 2025 summary for Jij-Inc/ommx focusing on delivering core optimization capabilities, improving interoperability with OpenJij, and strengthening CI/test reliability. Key features and improvements were shipped with clear business value: enhanced modeling flexibility, better solution quality, and faster onboarding for customers and partners.
March 2025
February 2025
25 Commits • 12 Features
Feb 1, 2025February 2025 performance snapshot for Jij-Inc/ommx: Delivered release-ready SDKs, foundational design work, and documentation/build enhancements that drive developer velocity, stability, and business value across Python and Rust ecosystems.
February 2025
25 Commits • 12 Features
Feb 1, 2025February 2025 performance snapshot for Jij-Inc/ommx: Delivered release-ready SDKs, foundational design work, and documentation/build enhancements that drive developer velocity, stability, and business value across Python and Rust ecosystems.
January 2025
5 Commits • 2 Features
Jan 1, 2025January 2025: Strengthened API usability and artifact-driven workflows in Jij-Inc/ommx. Key features include SampleSet API enhancements with get, best_feasible, and best_feasible_unrelaxed, and full OMMX Artifact integration enabling retrieval of samples as Solution objects and access via ParametricInstance, including new media types. Fixed the TSP tutorial objective to reflect the cyclical nature of the problem and corrected related modulo handling. Prepared English language support by reorganizing docs and adding English Jupyter Book content, with updated CI to build both Japanese and English docs. These changes improve reproducibility through artifacts, enhance API usability and onboarding, and broaden the audience with bilingual documentation, supported by CI automation.
5 Commits • 2 Features
Jan 1, 2025January 2025: Strengthened API usability and artifact-driven workflows in Jij-Inc/ommx. Key features include SampleSet API enhancements with get, best_feasible, and best_feasible_unrelaxed, and full OMMX Artifact integration enabling retrieval of samples as Solution objects and access via ParametricInstance, including new media types. Fixed the TSP tutorial objective to reflect the cyclical nature of the problem and corrected related modulo handling. Prepared English language support by reorganizing docs and adding English Jupyter Book content, with updated CI to build both Japanese and English docs. These changes improve reproducibility through artifacts, enhance API usability and onboarding, and broaden the audience with bilingual documentation, supported by CI automation.
January 2025
December 2024
47 Commits • 27 Features
Dec 1, 2024December 2024 monthly summary for Jij-Inc/ommx highlighting major feature deliveries, stability improvements, and SDK readiness. The team expanded output capabilities (QUBO/PUBO) and improved runtime performance with partial evaluation, redesigned and stabilized core data models, and strengthened OpenJij and Jupyter-Book integrations. Release readiness activities and packaging/CI updates also accelerated ecosystem readiness and developer experience, while targeted bug fixes improved correctness and reliability across output formatting, validation, and documentation.
December 2024
47 Commits • 27 Features
Dec 1, 2024December 2024 monthly summary for Jij-Inc/ommx highlighting major feature deliveries, stability improvements, and SDK readiness. The team expanded output capabilities (QUBO/PUBO) and improved runtime performance with partial evaluation, redesigned and stabilized core data models, and strengthened OpenJij and Jupyter-Book integrations. Release readiness activities and packaging/CI updates also accelerated ecosystem readiness and developer experience, while targeted bug fixes improved correctness and reliability across output formatting, validation, and documentation.
November 2024
19 Commits • 5 Features
Nov 1, 2024November 2024 monthly summary for Jij-Inc/ommx: Delivered end-to-end MIPLIB distribution as OMMX Artifacts with a Rust CLI for packaging/uploading and Python bindings for access; expanded artifact metadata capabilities to improve discoverability and reproducibility; introduced ParametricInstance and penalty_method to transform constrained problems into unconstrained formulations; stabilized core API by reverting dual_variable/penalty_weight changes to preserve QUBO/PUBO compatibility; strengthened CI/CD and release processes with reusable GitHub Actions, Taskfile, and clearer breaking-change release notes; advanced the modeling framework with arbitrary generation, partial evaluation, and API updates, backed by expanded tests and protobuf/Rust modeler improvements.
19 Commits • 5 Features
Nov 1, 2024November 2024 monthly summary for Jij-Inc/ommx: Delivered end-to-end MIPLIB distribution as OMMX Artifacts with a Rust CLI for packaging/uploading and Python bindings for access; expanded artifact metadata capabilities to improve discoverability and reproducibility; introduced ParametricInstance and penalty_method to transform constrained problems into unconstrained formulations; stabilized core API by reverting dual_variable/penalty_weight changes to preserve QUBO/PUBO compatibility; strengthened CI/CD and release processes with reusable GitHub Actions, Taskfile, and clearer breaking-change release notes; advanced the modeling framework with arbitrary generation, partial evaluation, and API updates, backed by expanded tests and protobuf/Rust modeler improvements.
November 2024
Activity
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Quality Metrics
Correctness95.0%
Maintainability93.6%
Architecture93.4%
Performance86.4%
AI Usage30.6%
Skills & Technologies
Programming Languages
C++GherkinHTMLJSONJavaScriptJupyter NotebookMarkdownProtocol BuffersPythonPython Interface Definition Language (IDL)
Technical Skills
AI Assisted DevelopmentAPI DesignAPI DevelopmentAPI MigrationAPI designAbstract ClassesAdapter DevelopmentAlgorithm DesignAlgorithm DevelopmentAlgorithm ImplementationAlgorithm OptimizationAlgorithmsArtifact ManagementBackend DevelopmentBackward Compatibility
Repositories Contributed To
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