facebook/infer
Oct 2024 – May 2026
12 Months active
Languages Used
ErlangOCamlObjective-CJavaMarkdownKotlinSwiftMakefile
Technical Skills
AST manipulationC/C++ developmentData extractionErlangOCamlObjective-C
Akos Hajdu
PROFILE
Akos Hajdu
Over the past year, contributed to the facebook/infer repository by building and refining static analysis features across multiple languages, including Java, Kotlin, Objective-C, and Erlang. Work focused on enhancing annotation reachability, improving config-gating infrastructure, and expanding test coverage to increase reliability and reduce false positives. Leveraged skills in OCaml, regex handling, and functional programming to implement granular control mechanisms, robust error handling, and language-aware filtering. Delivered features such as regex-based blocklists, strict generator support, and improved diagnostics for concurrency and map operations. Emphasized maintainability and cross-language support, resulting in more accurate analysis and streamlined triage for large codebases.
Overall Statistics
Feature vs Bugs
86%Features
Repository Contributions
59Total
Bugs
3
Commits
59
Features
18
Lines of code
1,153,338
Activity Months12
Your Network
3035 peopleSame Organization
@meta.com3012
Peter RongMember
Zain RizviMember
Aaditya NairMember
Aahan AggarwalMember
Aliaksei AndreyeuMember
Arjun ChaturvediMember
Aaron FarberMember
Aaron PollackMember
Aaryaman SagarMember
Work History
May 2026
20 Commits • 2 Features
May 1, 2026May 2026 highlights focused on hardening Infer's config-gating across Obj-C, multi-language ecosystems, and reducing noise in gating reports. Delivered targeted features, major blocklist refinements, and tooling that improves accuracy and maintainability. Key contributions enable more reliable gating signals, broader coverage of UIKit/Foundation, and adaptable, language-aware filtering. Key improvements and outcomes: - Objective-C gating enhancements: gating checker enabled for Objective-C, improved debugging/logging by reporting method names when configs are undetermined, and extended the blocklist to cover Foundation classes, internal functions, UIKit classes by UI* prefix, and relevant low-level system/runtime calls. Includes tests for gating behavior and notes current limitations around built-in functions and string literals. - Broad config-gating blocklist refinements: introduced language/name-based infrastructure, added a configurable CLI option for blocking callees, consolidated patterns, and excluded wide ranges of standard library and framework calls to improve gating accuracy and reduce noise. - Extensive cross-language hardening: blocklists expanded across Java/Kotlin, Android Jetpack, JSON, GCD/libdispatch, and more; added per-language blocklist entries and regex-based suppression. - Additional coverage and hardening: added NSMutableString to hardcoded blocklist; blocked common system/runtime calls (os_log, dlsym, dlopen, dladdr); blocked NSStringFrom* callsites; refined Foundation/ObjC intrinsics and compiler-level patterns. - Testing and reliability: added tests for gating behavior across Obj-C and multi-language contexts; documented current limitations around built-in functions and string literals to guide future refinements. Business value and impact: - Significantly reduces noise in config-gating reports, enabling faster triage and more trustworthy gating signals for multi-language codebases. - Broadens coverage to critical frameworks (UIKit/Foundation) and low-level system interactions, improving gating relevance for real-world apps and libraries. - Establishes scalable, language-aware gating infrastructure that can be extended with user-configurable patterns, reducing maintenance overhead and enabling teams to tailor gating to their ecosystems.
20 Commits • 2 Features
May 1, 2026May 2026 highlights focused on hardening Infer's config-gating across Obj-C, multi-language ecosystems, and reducing noise in gating reports. Delivered targeted features, major blocklist refinements, and tooling that improves accuracy and maintainability. Key contributions enable more reliable gating signals, broader coverage of UIKit/Foundation, and adaptable, language-aware filtering. Key improvements and outcomes: - Objective-C gating enhancements: gating checker enabled for Objective-C, improved debugging/logging by reporting method names when configs are undetermined, and extended the blocklist to cover Foundation classes, internal functions, UIKit classes by UI* prefix, and relevant low-level system/runtime calls. Includes tests for gating behavior and notes current limitations around built-in functions and string literals. - Broad config-gating blocklist refinements: introduced language/name-based infrastructure, added a configurable CLI option for blocking callees, consolidated patterns, and excluded wide ranges of standard library and framework calls to improve gating accuracy and reduce noise. - Extensive cross-language hardening: blocklists expanded across Java/Kotlin, Android Jetpack, JSON, GCD/libdispatch, and more; added per-language blocklist entries and regex-based suppression. - Additional coverage and hardening: added NSMutableString to hardcoded blocklist; blocked common system/runtime calls (os_log, dlsym, dlopen, dladdr); blocked NSStringFrom* callsites; refined Foundation/ObjC intrinsics and compiler-level patterns. - Testing and reliability: added tests for gating behavior across Obj-C and multi-language contexts; documented current limitations around built-in functions and string literals to guide future refinements. Business value and impact: - Significantly reduces noise in config-gating reports, enabling faster triage and more trustworthy gating signals for multi-language codebases. - Broadens coverage to critical frameworks (UIKit/Foundation) and low-level system interactions, improving gating relevance for real-world apps and libraries. - Establishes scalable, language-aware gating infrastructure that can be extended with user-configurable patterns, reducing maintenance overhead and enabling teams to tailor gating to their ecosystems.
May 2026
February 2026
7 Commits • 2 Features
Feb 1, 2026February 2026 (2026-02) delivered significant improvements to Infer's annotation reachability analysis with a focus on granular control, strengthened testing, and targeted maintenance. The work enables more precise source/sink marking, reduces operator friction, and improves maintainability and test reliability. Key outcomes include new regex-based control with per-spec overrides, comprehensive test organization, and cleanup of obsolete types to simplify the codebase.
February 2026
7 Commits • 2 Features
Feb 1, 2026February 2026 (2026-02) delivered significant improvements to Infer's annotation reachability analysis with a focus on granular control, strengthened testing, and targeted maintenance. The work enables more precise source/sink marking, reduces operator friction, and improves maintainability and test reliability. Key outcomes include new regex-based control with per-spec overrides, comprehensive test organization, and cleanup of obsolete types to simplify the codebase.
January 2026
5 Commits • 2 Features
Jan 1, 2026January 2026 monthly work summary for facebook/infer. Focused on OTP 28 strict generator support in the Erlang frontend, cross-language reachability analysis enhancements for Swift, and documentation quality improvements. Delivered concrete features, fixed a documentation issue, and expanded test coverage to reduce translation errors and increase analysis reliability.
5 Commits • 2 Features
Jan 1, 2026January 2026 monthly work summary for facebook/infer. Focused on OTP 28 strict generator support in the Erlang frontend, cross-language reachability analysis enhancements for Swift, and documentation quality improvements. Delivered concrete features, fixed a documentation issue, and expanded test coverage to reduce translation errors and increase analysis reliability.
January 2026
August 2025
1 Commits • 1 Features
Aug 1, 2025August 2025: Enhanced Kotlin extension method test coverage to strengthen annotation reachability checks in Infer. Added tests for both annotated and regex-based sinks, expanding coverage and reducing potential false negatives in Kotlin code paths. The work was implemented in a focused commit (072b2978cdadd0efbd0f5e90162add570a5a1099) for the facebook/infer repository. Overall impact: more robust static analysis for Kotlin, improved confidence in reachability decisions, and demonstrated proficiency in Kotlin and test-driven development.
August 2025
1 Commits • 1 Features
Aug 1, 2025August 2025: Enhanced Kotlin extension method test coverage to strengthen annotation reachability checks in Infer. Added tests for both annotated and regex-based sinks, expanding coverage and reducing potential false negatives in Kotlin code paths. The work was implemented in a focused commit (072b2978cdadd0efbd0f5e90162add570a5a1099) for the facebook/infer repository. Overall impact: more robust static analysis for Kotlin, improved confidence in reachability decisions, and demonstrated proficiency in Kotlin and test-driven development.
July 2025
2 Commits • 1 Features
Jul 1, 2025July 2025 (2025-07) - Strengthened correctness and reliability of map-related behavior in the Infer repository by adding nondeterministic map ordering tests for Erlang. Expanded coverage to include maps:values/1, reinforcing resilience against flaky outcomes when maps are accessed repeatedly. No critical bugs fixed this month; efforts focused on test depth, maintainability, and CI readiness. Business value: higher confidence in map semantics, reduced risk of flaky tests impacting releases, and clearer signals for performance and correctness investments.
2 Commits • 1 Features
Jul 1, 2025July 2025 (2025-07) - Strengthened correctness and reliability of map-related behavior in the Infer repository by adding nondeterministic map ordering tests for Erlang. Expanded coverage to include maps:values/1, reinforcing resilience against flaky outcomes when maps are accessed repeatedly. No critical bugs fixed this month; efforts focused on test depth, maintainability, and CI readiness. Business value: higher confidence in map semantics, reduced risk of flaky tests impacting releases, and clearer signals for performance and correctness investments.
July 2025
June 2025
1 Commits • 1 Features
Jun 1, 2025Monthly summary for 2025-06 focusing on key accomplishments, major bugs fixed (none documented in provided data), overall impact, and technologies demonstrated for the facebook/infer repository.
June 2025
1 Commits • 1 Features
Jun 1, 2025Monthly summary for 2025-06 focusing on key accomplishments, major bugs fixed (none documented in provided data), overall impact, and technologies demonstrated for the facebook/infer repository.
May 2025
1 Commits • 1 Features
May 1, 2025May 2025 monthly summary for facebook/infer. Focused on delivering a targeted feature to improve Pulse checker usability and reduce triage effort. Implemented a regex-based blocklist for retain cycles in the Pulse checker, enabling users to specify a pattern to blocklist known or expected retain cycles, thereby reducing noise and improving developer efficiency. This was introduced via commit 9ff383951364f2ff77c1df84d0bcd6794f13efaa with: "[pulse] Add option to blocklist retain cycles by regexp over expression." The change integrates with the Pulse checker workflow and supports flexible filtering for large codebases.
1 Commits • 1 Features
May 1, 2025May 2025 monthly summary for facebook/infer. Focused on delivering a targeted feature to improve Pulse checker usability and reduce triage effort. Implemented a regex-based blocklist for retain cycles in the Pulse checker, enabling users to specify a pattern to blocklist known or expected retain cycles, thereby reducing noise and improving developer efficiency. This was introduced via commit 9ff383951364f2ff77c1df84d0bcd6794f13efaa with: "[pulse] Add option to blocklist retain cycles by regexp over expression." The change integrates with the Pulse checker workflow and supports flexible filtering for large codebases.
May 2025
April 2025
1 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for facebook/infer focused on enhancing diagnostics in the concurrency model. Delivered an improvement to error handling by adding informative lock warnings that specify the exact lock type name and include an assumption about recursive behavior when a lock type is missing. This change improves observability and accelerates root-cause analysis for starvation-related scenarios while maintaining system stability.
April 2025
1 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for facebook/infer focused on enhancing diagnostics in the concurrency model. Delivered an improvement to error handling by adding informative lock warnings that specify the exact lock type name and include an assumption about recursive behavior when a lock type is missing. This change improves observability and accelerates root-cause analysis for starvation-related scenarios while maintaining system stability.
January 2025
9 Commits • 2 Features
Jan 1, 2025January 2025 performance summary for facebook/infer: Implemented reliability and observability enhancements to the annotation reachability feature set, strengthened domain robustness, and enforced Java-specific field access checks. These changes improve diagnostic clarity, reduce silent failures, and provide stronger test coverage and observability.
9 Commits • 2 Features
Jan 1, 2025January 2025 performance summary for facebook/infer: Implemented reliability and observability enhancements to the annotation reachability feature set, strengthened domain robustness, and enforced Java-specific field access checks. These changes improve diagnostic clarity, reduce silent failures, and provide stronger test coverage and observability.
January 2025
December 2024
1 Commits • 1 Features
Dec 1, 2024December 2024 monthly wrap-up for repository facebook/infer. Key features delivered: Implemented User-Defined Property Categorization by adding a new issue category 'UserDefinedProperty' to support custom user-specified properties. This included updates to issue type definitions and re-registration of checkers to leverage the new category, enabling more flexible issue categorization during static analysis. Major bugs fixed: None reported this month. Overall impact and accomplishments: Enhances taxonomy flexibility, improves triage accuracy, and sets groundwork for user-driven property criteria in future analyses, contributing to faster issue resolution and better reporting. Technologies/skills demonstrated: taxonomy design and API evolution, updater of checker registration, traceability through commit 89ba61b83eca33580bc75f3f24777274a425d861, and emphasis on maintainability and extensibility.
December 2024
1 Commits • 1 Features
Dec 1, 2024December 2024 monthly wrap-up for repository facebook/infer. Key features delivered: Implemented User-Defined Property Categorization by adding a new issue category 'UserDefinedProperty' to support custom user-specified properties. This included updates to issue type definitions and re-registration of checkers to leverage the new category, enabling more flexible issue categorization during static analysis. Major bugs fixed: None reported this month. Overall impact and accomplishments: Enhances taxonomy flexibility, improves triage accuracy, and sets groundwork for user-driven property criteria in future analyses, contributing to faster issue resolution and better reporting. Technologies/skills demonstrated: taxonomy design and API evolution, updater of checker registration, traceability through commit 89ba61b83eca33580bc75f3f24777274a425d861, and emphasis on maintainability and extensibility.
November 2024
5 Commits • 2 Features
Nov 1, 2024Month: 2024-11 – Facebook Infer: Key feature enhancements to annotation reachability tooling and report clarity. Delivered internal tooling improvements for annotation reachability analysis, including cleanup/refactor, optimized callee data merging, and enhanced logging for reachability checks and data flow in debug mode. Also added an optional short name for custom pairs to improve report clarity. No major bug fixes were documented this month; the focus was on feature delivery and stability improvements, which reduce debugging time and improve traceability across reports and analyses.
5 Commits • 2 Features
Nov 1, 2024Month: 2024-11 – Facebook Infer: Key feature enhancements to annotation reachability tooling and report clarity. Delivered internal tooling improvements for annotation reachability analysis, including cleanup/refactor, optimized callee data merging, and enhanced logging for reachability checks and data flow in debug mode. Also added an optional short name for custom pairs to improve report clarity. No major bug fixes were documented this month; the focus was on feature delivery and stability improvements, which reduce debugging time and improve traceability across reports and analyses.
November 2024
October 2024
6 Commits • 2 Features
Oct 1, 2024October 2024 performance snapshot for facebook/infer: Delivered cross-language enhancements to static analysis features, expanded language coverage, and strengthened test suites. Implemented binary data handling in AST extraction for Erlang with corresponding tests, and extended the annotation reachability checker to Erlang and Clang with improved transitive-path error messaging. Added Objective-C tests to reinforce reliability across languages and included frontend tests for binary attributes. These changes broaden analysis scope, improve accuracy, and accelerate issue triage for cross-language codebases.
October 2024
6 Commits • 2 Features
Oct 1, 2024October 2024 performance snapshot for facebook/infer: Delivered cross-language enhancements to static analysis features, expanded language coverage, and strengthened test suites. Implemented binary data handling in AST extraction for Erlang with corresponding tests, and extended the annotation reachability checker to Erlang and Clang with improved transitive-path error messaging. Added Objective-C tests to reinforce reliability across languages and included frontend tests for binary attributes. These changes broaden analysis scope, improve accuracy, and accelerate issue triage for cross-language codebases.
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Quality Metrics
Correctness95.0%
Maintainability91.2%
Architecture92.2%
Performance91.2%
AI Usage49.8%
Skills & Technologies
Programming Languages
ErlangJavaJavaScriptKotlinMakefileMarkdownOCamlObjective-CSwiftYAML
Technical Skills
AST manipulationAnnotation ProcessingBuild SystemsC/C++ developmentCI/CDCompiler DesignData extractionErlangFunctional ProgrammingGitJavaJava DevelopmentKotlinOCamlOCaml Development
Repositories Contributed To
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