google/silifuzz
Jan 2025 – Mar 2026
10 Months active
Languages Used
C++MarkdownShellBazelBUILDPythonbashplaintext
Technical Skills
Build SystemsC++ DevelopmentCompiler DevelopmentDocumentationLow-level ProgrammingMemory Safety
Han Yang Tay
PROFILE
Han Yang Tay
Hanyang Tay contributed to the google/silifuzz repository by developing and maintaining features that enhanced build stability, cross-platform compatibility, and test reliability for low-level system fuzzing tools. Over ten months, Hanyang delivered architecture-specific improvements such as indirect-branch filtering for ARM and AArch64, robust platform decoding, and legacy format support, while also addressing build fragility and CI failures through Bazel and C++ build system refinements. His work included refactoring code for maintainability, improving documentation for onboarding, and resolving subtle bugs affecting memory safety and test determinism. Hanyang’s technical depth spanned C++, Bazel, and Python, consistently improving reproducibility and developer experience.
Overall Statistics
Feature vs Bugs
53%Features
Repository Contributions
33Total
Bugs
9
Commits
33
Features
10
Lines of code
1,150
Activity Months10
Your Network
4402 peopleSame Organization
@google.com4393
Benedict OdaiMember
Craig IngramMember
KayyuriMember
Scott SuarezMember
Agent2Agent (A2A) BotMember
Andreas AbelMember
Aadi KapurMember
Aadish GoelMember
Aahil MehtaMember
Shared Repositories
9
Work History
March 2026
4 Commits • 1 Features
Mar 1, 20262026-03 Monthly summary for google/silifuzz focusing on key architecture-related feature work and build-stability fixes. Key features delivered: Indirect-branch filtering enhancements for ARM and AArch64, including a static filter for AArch64 unconditional branches and new filtering options to reduce false positives in tracing; Implemented the ARM indirect-branch filter during snap tracing and propagated the AArch64 filter option to the fix_tool for end-to-end consistency. Major bugs fixed: Restored build stability after fuzztest module changes, ensuring compatibility and CI reliability. Overall impact: Improved tracing accuracy and fuzzing reliability across architectures, enabling faster triage, more robust fuzzing campaigns, and smoother releases. Technologies/skills demonstrated: Cross-architecture filtering logic, static filter design, fix_tool integration, fuzztest-build pipeline maintenance, and build-system debugging with a focus on business value.
4 Commits • 1 Features
Mar 1, 20262026-03 Monthly summary for google/silifuzz focusing on key architecture-related feature work and build-stability fixes. Key features delivered: Indirect-branch filtering enhancements for ARM and AArch64, including a static filter for AArch64 unconditional branches and new filtering options to reduce false positives in tracing; Implemented the ARM indirect-branch filter during snap tracing and propagated the AArch64 filter option to the fix_tool for end-to-end consistency. Major bugs fixed: Restored build stability after fuzztest module changes, ensuring compatibility and CI reliability. Overall impact: Improved tracing accuracy and fuzzing reliability across architectures, enabling faster triage, more robust fuzzing campaigns, and smoother releases. Technologies/skills demonstrated: Cross-architecture filtering logic, static filter design, fix_tool integration, fuzztest-build pipeline maintenance, and build-system debugging with a focus on business value.
March 2026
February 2026
6 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary for google/silifuzz: Delivered OSS Build Stabilization and Test Reliability with consolidation of OSS build improvements to address libpfm4 breakages, misconfigurations, dependency upgrades, endian compatibility, Python build target fixes, and test environment stability. Upgraded tooling and configuration (Bazel), adjusted build targets, and disabled flaky tests to ensure OSS builds are reliable with latest APIs and dependencies.
February 2026
6 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary for google/silifuzz: Delivered OSS Build Stabilization and Test Reliability with consolidation of OSS build improvements to address libpfm4 breakages, misconfigurations, dependency upgrades, endian compatibility, Python build target fixes, and test environment stability. Upgraded tooling and configuration (Bazel), adjusted build targets, and disabled flaky tests to ensure OSS builds are reliable with latest APIs and dependencies.
January 2026
1 Commits • 1 Features
Jan 1, 2026Month 2026-01 focused on improving developer experience for SiliFuzz by clarifying and stabilizing local setup procedures. Delivered a targeted README update to fix local run instructions, refine build commands, and correct file paths, enhancing reproducibility and onboarding. All work is traceable to a single commit addressing issue #21, reinforcing maintainability and auditability. No major bug fixes were recorded this month; the emphasis was on documentation, setup reliability, and cross-team clarity.
1 Commits • 1 Features
Jan 1, 2026Month 2026-01 focused on improving developer experience for SiliFuzz by clarifying and stabilizing local setup procedures. Delivered a targeted README update to fix local run instructions, refine build commands, and correct file paths, enhancing reproducibility and onboarding. All work is traceable to a single commit addressing issue #21, reinforcing maintainability and auditability. No major bug fixes were recorded this month; the emphasis was on documentation, setup reliability, and cross-team clarity.
January 2026
October 2025
1 Commits
Oct 1, 2025October 2025 monthly summary for google/silifuzz: Stabilized a flaky runner statm test in the test suite to improve CI reliability. Implemented a deterministic workaround using a sleep delay and added necessary time headers in C++ to ensure consistent behavior across environments. The changes were committed as 6b86c734d544c4e9fd6f2fdaceab9ffd480cea52 with message 'Fix flaky runner statm test with an ugly sleep hack.' Result: reduced flaky runs, enabling faster feedback and more confident releases.
October 2025
1 Commits
Oct 1, 2025October 2025 monthly summary for google/silifuzz: Stabilized a flaky runner statm test in the test suite to improve CI reliability. Implemented a deterministic workaround using a sleep delay and added necessary time headers in C++ to ensure consistent behavior across environments. The changes were committed as 6b86c734d544c4e9fd6f2fdaceab9ffd480cea52 with message 'Fix flaky runner statm test with an ugly sleep hack.' Result: reduced flaky runs, enabling faster feedback and more confident releases.
September 2025
1 Commits
Sep 1, 2025September 2025 (google/silifuzz): Stability-focused GRTE compatibility work centered on decoding behavior. Implemented a targeted bug fix that temporarily disables APX ISA decoding to avoid instability when running on GRTE, and updated the decoding path to route through xed_decode_with_features with APX registers explicitly disabled. A TODO was added in get_reg to plan future APX register support. This work preserves existing functionality while ensuring safer fuzzing across GRTE environments. Commit reference: 804483ff2a1b02853a8333fe49391b886a229f38.
1 Commits
Sep 1, 2025September 2025 (google/silifuzz): Stability-focused GRTE compatibility work centered on decoding behavior. Implemented a targeted bug fix that temporarily disables APX ISA decoding to avoid instability when running on GRTE, and updated the decoding path to route through xed_decode_with_features with APX registers explicitly disabled. A TODO was added in get_reg to plan future APX register support. This work preserves existing functionality while ensuring safer fuzzing across GRTE environments. Commit reference: 804483ff2a1b02853a8333fe49391b886a229f38.
September 2025
July 2025
2 Commits
Jul 1, 2025July 2025 monthly summary: Focused on stabilizing the build system for google/silifuzz and fixing OSS build issues. Implemented a critical OSS build fix by removing a malformed dependency and updating Bazel to use the new location for cc_rules, ensuring correct C++ rule lookup and reliable compilation across configurations. The changes improve build reliability, OSS compatibility, and reduce maintenance friction for downstream users. Key commits included: 766d91d7b33b0f263a4111ed399dddb987bb682d (Rewrite Bazel dependency for cc_rules) and 114929beebdf718c522dd43db58df853e72b2bbb (Remove malformed build dep to fix OSS build).
July 2025
2 Commits
Jul 1, 2025July 2025 monthly summary: Focused on stabilizing the build system for google/silifuzz and fixing OSS build issues. Implemented a critical OSS build fix by removing a malformed dependency and updating Bazel to use the new location for cc_rules, ensuring correct C++ rule lookup and reliable compilation across configurations. The changes improve build reliability, OSS compatibility, and reduce maintenance friction for downstream users. Key commits included: 766d91d7b33b0f263a4111ed399dddb987bb682d (Rewrite Bazel dependency for cc_rules) and 114929beebdf718c522dd43db58df853e72b2bbb (Remove malformed build dep to fix OSS build).
April 2025
2 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for google/silifuzz: Delivered a build environment upgrade to Ubuntu Noble to boost Bazel build stability, updated installation scripts to handle interactive prompts, and refreshed docs to reflect the new image. These changes improved CI reliability, reproducibility across environments, and developer onboarding.
2 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for google/silifuzz: Delivered a build environment upgrade to Ubuntu Noble to boost Bazel build stability, updated installation scripts to handle interactive prompts, and refreshed docs to reflect the new image. These changes improved CI reliability, reproducibility across environments, and developer onboarding.
April 2025
March 2025
2 Commits
Mar 1, 2025Monthly summary for 2025-03 focused on stabilizing the build and improving linking reliability for google/silifuzz. Delivered two high-value fixes with minimal functional changes, improving CI stability and reliability when integrating with other libraries.
March 2025
2 Commits
Mar 1, 2025Monthly summary for 2025-03 focused on stabilizing the build and improving linking reliability for google/silifuzz. Delivered two high-value fixes with minimal functional changes, improving CI stability and reliability when integrating with other libraries.
February 2025
9 Commits • 3 Features
Feb 1, 2025February 2025 monthly summary for google/silifuzz. Delivered cross-architecture platform decoding improvements, enhanced instruction filtering, stability fixes, and targeted AVX test stabilization. Added AMD Turin support and comprehensive test coverage, with repo-wide refactors to streamline platform handling across X86 and ARM. Emphasis on reliability, cross-platform compatibility, and maintainable design to reduce platform-specific issues in production and CI.
9 Commits • 3 Features
Feb 1, 2025February 2025 monthly summary for google/silifuzz. Delivered cross-architecture platform decoding improvements, enhanced instruction filtering, stability fixes, and targeted AVX test stabilization. Added AMD Turin support and comprehensive test coverage, with repo-wide refactors to streamline platform handling across X86 and ARM. Emphasis on reliability, cross-platform compatibility, and maintainable design to reduce platform-specific issues in production and CI.
February 2025
January 2025
5 Commits • 3 Features
Jan 1, 2025During 2025-01, the Silifuzz project delivered reliability, security, and usability improvements in google/silifuzz. Key changes include a bug fix for path handling, enhancements to documentation navigation, stabilization of tests, a defense-in-depth tracing improvement for AArch64, and support for a legacy x86_64 snapshot format. These changes decrease runtime path errors, improve developer onboarding, ensure stable test runs, strengthen tracing defenses, and broaden test coverage.
January 2025
5 Commits • 3 Features
Jan 1, 2025During 2025-01, the Silifuzz project delivered reliability, security, and usability improvements in google/silifuzz. Key changes include a bug fix for path handling, enhancements to documentation navigation, stabilization of tests, a defense-in-depth tracing improvement for AArch64, and support for a legacy x86_64 snapshot format. These changes decrease runtime path errors, improve developer onboarding, ensure stable test runs, strengthen tracing defenses, and broaden test coverage.
Activity
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Quality Metrics
Correctness91.8%
Maintainability89.0%
Architecture89.4%
Performance84.2%
AI Usage20.0%
Skills & Technologies
Programming Languages
BUILDBazelC++MarkdownPythonShellbashplaintext
Technical Skills
ARM architectureBazelBuild SystemBuild System ConfigurationBuild SystemsBuild system configurationC++C++ DevelopmentC++ developmentCI/CDCPU ArchitectureCode OrganizationCode RefactoringCompiler DevelopmentCompiler development
Repositories Contributed To
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