google/crubit
Mar 2025 – May 2026
9 Months active
Languages Used
PythonBuildC++RustTOMLShellStarlarkBash
Technical Skills
BazelBuild SystemAST ManipulationBuild System ConfigurationBuild SystemsC++
Michael VanBemmel
PROFILE
Michael Vanbemmel
Worked on the google/crubit repository to advance Rust and C++ binding generation, focusing on build reliability, error diagnostics, and developer experience. Delivered features such as attribute handling improvements, feature flag management, and enhanced cross-language error reporting, while maintaining compatibility with evolving Rust APIs. Leveraged Bazel for build system configuration, implemented automation and scripting in Python and Shell, and applied C++ and Rust for code generation and testing. Refactored core traits and improved documentation to clarify experimental status and reduce support overhead. The work emphasized maintainability, robust error handling, and streamlined debugging, resulting in a more stable and adaptable codebase.
Overall Statistics
Feature vs Bugs
57%Features
Repository Contributions
33Total
Bugs
10
Commits
33
Features
13
Lines of code
1,754
Activity Months9
Your Network
4748 peopleSame Organization
@google.com4703
Benedict OdaiMember
Craig IngramMember
KayyuriMember
Scott SuarezMember
Agent2Agent (A2A) BotMember
Andreas AbelMember
Aadi KapurMember
Aadish GoelMember
Aahil MehtaMember
Shared Repositories
45
Work History
May 2026
1 Commits
May 1, 2026Month 2026-05 focused on documentation governance for the google/crubit experimental feature: clarified status in README, removed outdated bug references, and added a clearer stability warning. These changes reduce user confusion, lower support overhead, and improve adoption decisions. All changes were documented in a single commit and traceable via PiperOrigin-RevId 914510763.
1 Commits
May 1, 2026Month 2026-05 focused on documentation governance for the google/crubit experimental feature: clarified status in README, removed outdated bug references, and added a clearer stability warning. These changes reduce user confusion, lower support overhead, and improve adoption decisions. All changes were documented in a single commit and traceable via PiperOrigin-RevId 914510763.
May 2026
March 2026
3 Commits • 1 Features
Mar 1, 2026March 2026 — google/crubit: Architectural refactor and stability fixes delivering tangible business value. Key feature: moved Item::defining_target into the GenericItem trait to standardize behavior across item types and pave the way for future impls (commit a755d962c40f7b39640147dd4977fdcaa7927aa7). Major bugs fixed: restored the no-cache option in golden_update.sh to ensure reliable update flows in edge cases (commit 298aa5ce46c5d098db00e26afe752912c9717348); ensured UnsupportedItem retains defining_target to preserve error-context and prevent panics (commit 77993b6da2ca81948eff683488f77b978c669d1a). Overall impact: improved stability, maintainability, and safety of the update path and error reporting, enabling smoother CI and faster future iterations. Technologies/skills demonstrated: Rust trait-based design, refactoring with minimal disruption, defensive programming for context retention, and alignment with automated tests/CI.
March 2026
3 Commits • 1 Features
Mar 1, 2026March 2026 — google/crubit: Architectural refactor and stability fixes delivering tangible business value. Key feature: moved Item::defining_target into the GenericItem trait to standardize behavior across item types and pave the way for future impls (commit a755d962c40f7b39640147dd4977fdcaa7927aa7). Major bugs fixed: restored the no-cache option in golden_update.sh to ensure reliable update flows in edge cases (commit 298aa5ce46c5d098db00e26afe752912c9717348); ensured UnsupportedItem retains defining_target to preserve error-context and prevent panics (commit 77993b6da2ca81948eff683488f77b978c669d1a). Overall impact: improved stability, maintainability, and safety of the update path and error reporting, enabling smoother CI and faster future iterations. Technologies/skills demonstrated: Rust trait-based design, refactoring with minimal disruption, defensive programming for context retention, and alignment with automated tests/CI.
February 2026
5 Commits • 2 Features
Feb 1, 2026February 2026 Highlights for google/crubit: Delivered two cross-language feature updates to strengthen build reliability and error diagnostics for Rust/C++ bindings. Key outcomes: (1) Build and Toolchain Improvements for Rust and C++ Bindings—stabilized transitive dependency resolution in Bazel queries by introducing synthetic dependencies, accelerating builds and reducing flakiness across the Rust/C++ bindings. (2) Enhanced Error Reporting for Multi-Language Projects—added unique C++ item identification via USR strings, captured the source language in error reports (C++ or Rust), and emitted defining_target information to distinguish current-language templates and cross-target scenarios. Impact: Faster, more reliable builds with clearer, cross-language error localization. Reduced debugging time and improved developer productivity when working with multi-language bindings. Technologies/Skills Demonstrated: Bazel build tooling, transitive dependency management, synthetic dependencies, C++ clang USR strings, cross-language error reporting, multi-language template targeting, and Rust/C++ interoperability.
5 Commits • 2 Features
Feb 1, 2026February 2026 Highlights for google/crubit: Delivered two cross-language feature updates to strengthen build reliability and error diagnostics for Rust/C++ bindings. Key outcomes: (1) Build and Toolchain Improvements for Rust and C++ Bindings—stabilized transitive dependency resolution in Bazel queries by introducing synthetic dependencies, accelerating builds and reducing flakiness across the Rust/C++ bindings. (2) Enhanced Error Reporting for Multi-Language Projects—added unique C++ item identification via USR strings, captured the source language in error reports (C++ or Rust), and emitted defining_target information to distinguish current-language templates and cross-target scenarios. Impact: Faster, more reliable builds with clearer, cross-language error localization. Reduced debugging time and improved developer productivity when working with multi-language bindings. Technologies/Skills Demonstrated: Bazel build tooling, transitive dependency management, synthetic dependencies, C++ clang USR strings, cross-language error reporting, multi-language template targeting, and Rust/C++ interoperability.
February 2026
December 2025
2 Commits
Dec 1, 2025Month: 2025-12 — Focused on reliability and compatibility in google/crubit. Delivered two focused fixes improving developer experience and build stability. Key business value: accurate bug tracking, up-to-date Rust API compatibility, and reduced time to diagnose and fix issues. Summary of work includes updating bug links and adapting code generation to rustc_span::FileName API changes to support latest Rust version, aligned with Rust PR 149709 and preserving PiperOrigin-RevId metadata.
December 2025
2 Commits
Dec 1, 2025Month: 2025-12 — Focused on reliability and compatibility in google/crubit. Delivered two focused fixes improving developer experience and build stability. Key business value: accurate bug tracking, up-to-date Rust API compatibility, and reduced time to diagnose and fix issues. Summary of work includes updating bug links and adapting code generation to rustc_span::FileName API changes to support latest Rust version, aligned with Rust PR 149709 and preserving PiperOrigin-RevId metadata.
November 2025
2 Commits • 2 Features
Nov 1, 2025Monthly summary for 2025-11 focusing on key accomplishments in google/crubit. The month delivered two major feature updates that enhance debugging efficiency and code organization, with no explicit bug fixes documented. These changes lay groundwork for future tracing while maintaining stability and performance.
2 Commits • 2 Features
Nov 1, 2025Monthly summary for 2025-11 focusing on key accomplishments in google/crubit. The month delivered two major feature updates that enhance debugging efficiency and code organization, with no explicit bug fixes documented. These changes lay groundwork for future tracing while maintaining stability and performance.
November 2025
October 2025
8 Commits • 4 Features
Oct 1, 2025October 2025 progress for google/crubit focused on hardening Rust binding generation, expanding observability, and stabilizing build/test workflows. Key outcomes include ABI-safety improvements for binding generation, enhanced diagnostics through tracing, and expanded experimental/test coverage for non_unpin_ctor while improving repository maintenance and readability.
October 2025
8 Commits • 4 Features
Oct 1, 2025October 2025 progress for google/crubit focused on hardening Rust binding generation, expanding observability, and stabilizing build/test workflows. Key outcomes include ABI-safety improvements for binding generation, enhanced diagnostics through tracing, and expanded experimental/test coverage for non_unpin_ctor while improving repository maintenance and readability.
September 2025
7 Commits • 2 Features
Sep 1, 2025September 2025 monthly summary for google/crubit: Key features delivered and stability improvements: - NonUnpinCtor feature flag introduction and refactor: Consolidated non-Unpin type handling behind a new non_unpin_ctor feature across binding generation, replacing old Wrapper usage and updating generated headers to support non-Unpin types. This enables a broader, safer binding surface during release cycles. - Build system improvement: Added out_compiled output group to the cc_bindings_from_rust_aspect to ensure the rlib from _cc_api_impl.rs is captured for C++ bindings, improving build reproducibility and integration with downstream C++ projects. - Rustc API compatibility: region erasure adjustments to adapt to changes in rustc API for newer Rust versions, maintaining forward compatibility of the crubit toolchain. - Golden test diagnostics updated: Improved golden test error messages to reflect upstream LLVM changes, clarifying when bindings for certain C++ standard library types cannot be generated. - Test stability enhancement: Disabled caching in golden_update.sh to prevent stale test results from affecting golden test updates and ensure fresh runs. Overall impact and accomplishments: - Strengthened binding surface for non-Unpin types, enabling broader usage and safer integrations with minimal churn. - Improved build reliability and determinism for C++ bindings, accelerating release readiness. - Maintained compatibility with evolving Rust toolchains, reducing future maintenance burden. - Improved test clarity and reliability, decreasing post-merge surprises related to LLVM changes and cached results. Technologies/skills demonstrated: - Rust and C++ binding integration, feature flag design, and header generation workflows. - Build system instrumentation and Bazel-like output grouping (out_compiled). - Rust compiler version compatibility (region erasure changes) and LLVM/diagnostic awareness. - Test automation discipline, golden test management, and cache-control strategies.
7 Commits • 2 Features
Sep 1, 2025September 2025 monthly summary for google/crubit: Key features delivered and stability improvements: - NonUnpinCtor feature flag introduction and refactor: Consolidated non-Unpin type handling behind a new non_unpin_ctor feature across binding generation, replacing old Wrapper usage and updating generated headers to support non-Unpin types. This enables a broader, safer binding surface during release cycles. - Build system improvement: Added out_compiled output group to the cc_bindings_from_rust_aspect to ensure the rlib from _cc_api_impl.rs is captured for C++ bindings, improving build reproducibility and integration with downstream C++ projects. - Rustc API compatibility: region erasure adjustments to adapt to changes in rustc API for newer Rust versions, maintaining forward compatibility of the crubit toolchain. - Golden test diagnostics updated: Improved golden test error messages to reflect upstream LLVM changes, clarifying when bindings for certain C++ standard library types cannot be generated. - Test stability enhancement: Disabled caching in golden_update.sh to prevent stale test results from affecting golden test updates and ensure fresh runs. Overall impact and accomplishments: - Strengthened binding surface for non-Unpin types, enabling broader usage and safer integrations with minimal churn. - Improved build reliability and determinism for C++ bindings, accelerating release readiness. - Maintained compatibility with evolving Rust toolchains, reducing future maintenance burden. - Improved test clarity and reliability, decreasing post-merge surprises related to LLVM changes and cached results. Technologies/skills demonstrated: - Rust and C++ binding integration, feature flag design, and header generation workflows. - Build system instrumentation and Bazel-like output grouping (out_compiled). - Rust compiler version compatibility (region erasure changes) and LLVM/diagnostic awareness. - Test automation discipline, golden test management, and cache-control strategies.
September 2025
August 2025
4 Commits • 2 Features
Aug 1, 2025Summary for 2025-08 for google/crubit: Delivered notable features and fixes that enhance the reliability and usability of CRUBIT bindings, enabling faster iteration and more dependable outputs. Key features include attribute handling improvements with CRUBIT_UNSAFE_IGNORE_ATTR and a robust CollectUnknownAttrs via StatusOr, plus the addition of a build output group out_compiled for rust_bindings_from_cc_aspect to support basic validation of generated libraries. Major bug fix addressed clearer test failures by improving error messages in the assert_ir_matches! macro. Overall, these changes reduce debugging time, improve binding generation reliability, and provide clearer visibility into build artifacts. Technologies demonstrated include C++ annotation usage, Rust macro testing, StatusOr-style error handling, and build tooling for artifact validation.
August 2025
4 Commits • 2 Features
Aug 1, 2025Summary for 2025-08 for google/crubit: Delivered notable features and fixes that enhance the reliability and usability of CRUBIT bindings, enabling faster iteration and more dependable outputs. Key features include attribute handling improvements with CRUBIT_UNSAFE_IGNORE_ATTR and a robust CollectUnknownAttrs via StatusOr, plus the addition of a build output group out_compiled for rust_bindings_from_cc_aspect to support basic validation of generated libraries. Major bug fix addressed clearer test failures by improving error messages in the assert_ir_matches! macro. Overall, these changes reduce debugging time, improve binding generation reliability, and provide clearer visibility into build artifacts. Technologies demonstrated include C++ annotation usage, Rust macro testing, StatusOr-style error handling, and build tooling for artifact validation.
March 2025
1 Commits
Mar 1, 2025March 2025 — google/crubit: Strengthened the binding generation pipeline by fixing the build output collection for generated bindings. Implemented changes to ensure complete output tracking and reliability of the build system, improving CI stability and incremental builds across the repository.
1 Commits
Mar 1, 2025March 2025 — google/crubit: Strengthened the binding generation pipeline by fixing the build output collection for generated bindings. Implemented changes to ensure complete output tracking and reliability of the build system, improving CI stability and incremental builds across the repository.
March 2025
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Quality Metrics
Correctness87.6%
Maintainability84.8%
Architecture83.0%
Performance76.4%
AI Usage20.6%
Skills & Technologies
Programming Languages
BashBuildC++MarkdownPythonRustShellStarlarkTOML
Technical Skills
API IntegrationAST ManipulationAutomationBazelBuild SystemBuild System ConfigurationBuild SystemsC++C++ developmentCode FormattingCode GenerationCode RefactoringCompiler DesignCompiler DevelopmentCompiler Internals
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline