well-typed/hs-bindgen
Jun 2025 – Apr 2026
11 Months active
Languages Used
CHaskellMakefileMarkdownRustShellYAMLBash
Technical Skills
API DesignBuild ScriptingBuild System ConfigurationBuild SystemsBuild ToolsC Bindings
Dominik Schrempf
PROFILE
Dominik Schrempf
Over eleven months, contributed to well-typed/hs-bindgen by building and refining a Haskell-based code generation and binding toolchain that automates C and Template Haskell interoperability. The work focused on robust parsing, macro handling, and diagnostics, introducing modular architecture, improved error reporting, and safer file I/O. Leveraging Haskell, C, and Nix, the developer enhanced test infrastructure, streamlined CI/CD, and strengthened type safety and runtime reliability. Iterative improvements included artefact tracing, macro parsing, and configuration management, resulting in a more maintainable, predictable pipeline. The approach emphasized test-driven development, clear documentation, and continuous integration to support reliable, extensible binding workflows.
Overall Statistics
Feature vs Bugs
76%Features
Repository Contributions
410Total
Bugs
52
Commits
410
Features
162
Lines of code
825,680
Activity Months11
Your Network
23 peopleShared Repositories
14
Work History
April 2026
2 Commits • 1 Features
Apr 1, 2026April 2026 monthly performance highlights for well-typed/hs-bindgen focused on strengthening diagnostics and CI reliability. Delivered two targeted improvements that reduce debugging time and increase pipeline visibility.
2 Commits • 1 Features
Apr 1, 2026April 2026 monthly performance highlights for well-typed/hs-bindgen focused on strengthening diagnostics and CI reliability. Delivered two targeted improvements that reduce debugging time and increase pipeline visibility.
April 2026
March 2026
41 Commits • 11 Features
Mar 1, 2026Month: 2026-03 — Monthly summary for well-typed/hs-bindgen focusing on reliability, performance readiness, and macro parsing improvements that underpin downstream tooling and tests.
March 2026
41 Commits • 11 Features
Mar 1, 2026Month: 2026-03 — Monthly summary for well-typed/hs-bindgen focusing on reliability, performance readiness, and macro parsing improvements that underpin downstream tooling and tests.
February 2026
41 Commits • 10 Features
Feb 1, 2026February 2026 (2026-02) monthly summary for well-typed/hs-bindgen: Delivered reliability and performance gains through global handling improvements, packaging hygiene, and stronger type-system support for globals; overhauled tuple/AST handling and Template Haskell integration for more predictable rendering; expanded test infrastructure with golden-spec exercises; cleaned up unsafe surface and improved error and panic messaging; maintained Nix Flake lock and updated dependencies for modern toolchains.
41 Commits • 10 Features
Feb 1, 2026February 2026 (2026-02) monthly summary for well-typed/hs-bindgen: Delivered reliability and performance gains through global handling improvements, packaging hygiene, and stronger type-system support for globals; overhauled tuple/AST handling and Template Haskell integration for more predictable rendering; expanded test infrastructure with golden-spec exercises; cleaned up unsafe surface and improved error and panic messaging; maintained Nix Flake lock and updated dependencies for modern toolchains.
February 2026
January 2026
65 Commits • 27 Features
Jan 1, 2026January 2026 Highlights for well-typed/hs-bindgen: feature delivery and reliability improvements focused on business value and developer experience. Key features delivered: - MangleNames integration with DeclIndex: introduced MangleNamesFailure, integrated into the DeclIndex workflow, registered MangleNames failures, reordered MangleNames and Select passes, added collision checks, and removed the obsolete MangleNames trace. This reduces name-collision risk and provides clearer diagnostics during code generation. Major bugs fixed: - Stability and error handling: fail fast when libclang reports an error and fix transitive dependency issues that affected collection of selection failures, ensuring only a single coherent trace is emitted. Overall impact and accomplishments: - Increased reliability of the code-generation pipeline, improved developer feedback through clearer messages, and stronger regression coverage via enhanced tests and golden fixtures. These changes reduce time-to-fix for users and enable safer refactors. Technologies/skills demonstrated: - Haskell, Clang bindings, and build tooling; pass orchestration and data-flow design (DeclIndex, MangleNames); test-driven development with golden tests and fixtures; Nix/Flake-based environment maintenance; Template Haskell and runtime/module internalization efforts to stabilize the API surface. Note: Additional work across the month touched testing infrastructure, environment maintenance (Nix Flake lock updates), and runtime/module refinements that support long-term stability and extensibility.
January 2026
65 Commits • 27 Features
Jan 1, 2026January 2026 Highlights for well-typed/hs-bindgen: feature delivery and reliability improvements focused on business value and developer experience. Key features delivered: - MangleNames integration with DeclIndex: introduced MangleNamesFailure, integrated into the DeclIndex workflow, registered MangleNames failures, reordered MangleNames and Select passes, added collision checks, and removed the obsolete MangleNames trace. This reduces name-collision risk and provides clearer diagnostics during code generation. Major bugs fixed: - Stability and error handling: fail fast when libclang reports an error and fix transitive dependency issues that affected collection of selection failures, ensuring only a single coherent trace is emitted. Overall impact and accomplishments: - Increased reliability of the code-generation pipeline, improved developer feedback through clearer messages, and stronger regression coverage via enhanced tests and golden fixtures. These changes reduce time-to-fix for users and enable safer refactors. Technologies/skills demonstrated: - Haskell, Clang bindings, and build tooling; pass orchestration and data-flow design (DeclIndex, MangleNames); test-driven development with golden tests and fixtures; Nix/Flake-based environment maintenance; Template Haskell and runtime/module internalization efforts to stabilize the API surface. Note: Additional work across the month touched testing infrastructure, environment maintenance (Nix Flake lock updates), and runtime/module refinements that support long-term stability and extensibility.
December 2025
38 Commits • 17 Features
Dec 1, 2025December 2025 — Well-typed/hs-bindgen: Delivered major artefact tracing and IO infrastructure improvements, enabling safer delayed IO and more robust tracer error handling; expanded tracing coverage around runArtefact; implemented safer file writing with FileDescription/FileLocation and a new DelayedIO module. Added integration tests for file overwrite policy and refined overwrite/output directory handling. Overhauled declaration index construction and the select pass for better binding/indexing. Improved test reliability and CI hygiene with stability fixes and clearer error messaging for test outcomes, plus fixtures updates. Performed essential tooling maintenance (Nix/Flake lock updates and libclang-bindings/script updates) to keep the pipeline healthy.
38 Commits • 17 Features
Dec 1, 2025December 2025 — Well-typed/hs-bindgen: Delivered major artefact tracing and IO infrastructure improvements, enabling safer delayed IO and more robust tracer error handling; expanded tracing coverage around runArtefact; implemented safer file writing with FileDescription/FileLocation and a new DelayedIO module. Added integration tests for file overwrite policy and refined overwrite/output directory handling. Overhauled declaration index construction and the select pass for better binding/indexing. Improved test reliability and CI hygiene with stability fixes and clearer error messaging for test outcomes, plus fixtures updates. Performed essential tooling maintenance (Nix/Flake lock updates and libclang-bindings/script updates) to keep the pipeline healthy.
December 2025
November 2025
55 Commits • 29 Features
Nov 1, 2025November 2025 (2025-11) monthly summary for well-typed/hs-bindgen. The period centered on stabilizing the selection/parse pipeline, extending test coverage, and tightening build/runtime behavior to reduce rebuilds and improve diagnostics. Delivered a coherent set of typedef parsing improvements, selection enhancements, and productivity-focused refinements across tests, docs, and tooling. Highlights include: typedef parsing and parse predicate improvements, ByCategory selection, robust test/golden coverage, runtime artefact handling with precise LLVM version overrides, and TH-mode/interface simplifications that improve usability and maintainability. Commits noted below show a consistent thread of improving correctness, determinism, and developer experience.
November 2025
55 Commits • 29 Features
Nov 1, 2025November 2025 (2025-11) monthly summary for well-typed/hs-bindgen. The period centered on stabilizing the selection/parse pipeline, extending test coverage, and tightening build/runtime behavior to reduce rebuilds and improve diagnostics. Delivered a coherent set of typedef parsing improvements, selection enhancements, and productivity-focused refinements across tests, docs, and tooling. Highlights include: typedef parsing and parse predicate improvements, ByCategory selection, robust test/golden coverage, runtime artefact handling with precise LLVM version overrides, and TH-mode/interface simplifications that improve usability and maintainability. Commits noted below show a consistent thread of improving correctness, determinism, and developer experience.
October 2025
22 Commits • 11 Features
Oct 1, 2025October 2025 monthly summary for well-typed/hs-bindgen: focused on stability, clarity, and developer experience while sustaining business value through robust bindings, clearer APIs, and reliable CI. Delivered targeted feature refinements, naming refactors to reduce confusion, and targeted bug fixes in parsing and dependency graphs, complemented by CI/dev tooling improvements and documentation updates.
22 Commits • 11 Features
Oct 1, 2025October 2025 monthly summary for well-typed/hs-bindgen: focused on stability, clarity, and developer experience while sustaining business value through robust bindings, clearer APIs, and reliable CI. Delivered targeted feature refinements, naming refactors to reduce confusion, and targeted bug fixes in parsing and dependency graphs, complemented by CI/dev tooling improvements and documentation updates.
October 2025
September 2025
51 Commits • 25 Features
Sep 1, 2025September 2025: Focused on establishing a stable first release, improving test isolation, and modernizing CI/QA to speed up development and ensure robust, repeatable builds. Major engineering work stabilized the public API, improved test infrastructure, and accelerated build iterations through artefact caching and isolated environments, laying a solid foundation for the initial release and future enhancements.
September 2025
51 Commits • 25 Features
Sep 1, 2025September 2025: Focused on establishing a stable first release, improving test isolation, and modernizing CI/QA to speed up development and ensure robust, repeatable builds. Major engineering work stabilized the public API, improved test infrastructure, and accelerated build iterations through artefact caching and isolated environments, laying a solid foundation for the initial release and future enhancements.
August 2025
46 Commits • 18 Features
Aug 1, 2025In August 2025, the hs-bindgen effort delivered meaningful progress across parsing, tracing, API surfaces, and architecture, plus practical usage examples and hardened test coverage. Key features delivered include: - Clang AST extern clause parsing enabled via clang-ast-dump (commit d68671ece6e7cc65112168ebd721c7b62e9e941f). - Tracing improvements: safe tracers and delayed parse-related traces (commits c38baac5384713b34d586bb1ed46ad137c0b5093 and f721d28ab46b142656f8b19329c7e6e726cf295a). - Documentation/implementation for manual parse, select, and slice operations (commit 2257220fb5ef785f3ee3d4e1e025dad5b57fc4c4). - TH API enhancements: BindgenOpts and baseConfig (commit 210f990f80df763077045060604f2a8b25131155). - Architecture refinement: separation of Lib and TH pipelines (commit bff2b1590c64498a1cecf617136b88fdab6d37c8) and comprehensive Frontend/Backend module refactor (a series of moves and consolidations across multiple commits). - Testing enhancements: direct hsBindgen usage in tests (commit be70518b5ad06a7b536cbb5b45ff377456d9022c) and broader test suite stabilization efforts (commit de4b66f6afbffc1d2f024b5a0280f5baae54b302). - Practical example: added a libpcap example project (commit 226bb1e0be66af8ac53f615ed70c1d33106f4227). - Additional quality improvements: Libclang failure resilience (commit 7a2e83eb97cd2db6dd93af0dd8b097e832b2b56e) and validation/typing enhancements (HashIncludeArgs typo fix, OutputCustom error handling improvements, and related test/typo fixes). Overall impact: strengthened parsing capabilities, improved observability and reliability, cleaner modular architecture enabling independent Lib/TH pipelines, and a more robust test/QA cycle. Business value includes reduced integration risk, faster onboarding for contributors, improved product quality, and clearer configuration/artefact support for Template Haskell workflows. Technologies and skills demonstrated: Clang tooling (clang-ast-dump, libclang), Haskell and Template Haskell APIs, architectural refactors (Boot/Frontend/Backend), advanced tracing/logging (IsTrace typeclass, trace IDs, --log-as-...), test-driven integration testing, and practical example provisioning (libpcap).
46 Commits • 18 Features
Aug 1, 2025In August 2025, the hs-bindgen effort delivered meaningful progress across parsing, tracing, API surfaces, and architecture, plus practical usage examples and hardened test coverage. Key features delivered include: - Clang AST extern clause parsing enabled via clang-ast-dump (commit d68671ece6e7cc65112168ebd721c7b62e9e941f). - Tracing improvements: safe tracers and delayed parse-related traces (commits c38baac5384713b34d586bb1ed46ad137c0b5093 and f721d28ab46b142656f8b19329c7e6e726cf295a). - Documentation/implementation for manual parse, select, and slice operations (commit 2257220fb5ef785f3ee3d4e1e025dad5b57fc4c4). - TH API enhancements: BindgenOpts and baseConfig (commit 210f990f80df763077045060604f2a8b25131155). - Architecture refinement: separation of Lib and TH pipelines (commit bff2b1590c64498a1cecf617136b88fdab6d37c8) and comprehensive Frontend/Backend module refactor (a series of moves and consolidations across multiple commits). - Testing enhancements: direct hsBindgen usage in tests (commit be70518b5ad06a7b536cbb5b45ff377456d9022c) and broader test suite stabilization efforts (commit de4b66f6afbffc1d2f024b5a0280f5baae54b302). - Practical example: added a libpcap example project (commit 226bb1e0be66af8ac53f615ed70c1d33106f4227). - Additional quality improvements: Libclang failure resilience (commit 7a2e83eb97cd2db6dd93af0dd8b097e832b2b56e) and validation/typing enhancements (HashIncludeArgs typo fix, OutputCustom error handling improvements, and related test/typo fixes). Overall impact: strengthened parsing capabilities, improved observability and reliability, cleaner modular architecture enabling independent Lib/TH pipelines, and a more robust test/QA cycle. Business value includes reduced integration risk, faster onboarding for contributors, improved product quality, and clearer configuration/artefact support for Template Haskell workflows. Technologies and skills demonstrated: Clang tooling (clang-ast-dump, libclang), Haskell and Template Haskell APIs, architectural refactors (Boot/Frontend/Backend), advanced tracing/logging (IsTrace typeclass, trace IDs, --log-as-...), test-driven integration testing, and practical example provisioning (libpcap).
August 2025
July 2025
16 Commits • 3 Features
Jul 1, 2025July 2025 highlights for well-typed/hs-bindgen: Delivered predicate-based program slicing and filtering enhancements that enable finer-grained code generation, refined predicate parsing/merging, and expanded tests for selection predicates. Also improved CLI usability and documentation, modernized API surface with include path management and TH/config/binding spec refactor, and strengthened error handling, tracing, and diagnostics for reliability and debuggability. These efforts boosted modularity, developer experience, and time-to-value for binding generation workflows.
July 2025
16 Commits • 3 Features
Jul 1, 2025July 2025 highlights for well-typed/hs-bindgen: Delivered predicate-based program slicing and filtering enhancements that enable finer-grained code generation, refined predicate parsing/merging, and expanded tests for selection predicates. Also improved CLI usability and documentation, modernized API surface with include path management and TH/config/binding spec refactor, and strengthened error handling, tracing, and diagnostics for reliability and debuggability. These efforts boosted modularity, developer experience, and time-to-value for binding generation workflows.
June 2025
33 Commits • 10 Features
Jun 1, 2025June 2025 monthly summary for well-typed/hs-bindgen: Delivered a set of features and stability improvements across the repository, with a focus on frontend documentation, test infrastructure, tracer/binding enhancements, and compiler/TH adjustments. The work reduces noise in tests, strengthens build-time and runtime diagnostics, and improves UX for option types and manual documentation. Key outcomes include updated frontend documentation, robust test infrastructure, renamed graph conventions for TH, safer typedef handling, and enhanced trace formatting.
33 Commits • 10 Features
Jun 1, 2025June 2025 monthly summary for well-typed/hs-bindgen: Delivered a set of features and stability improvements across the repository, with a focus on frontend documentation, test infrastructure, tracer/binding enhancements, and compiler/TH adjustments. The work reduces noise in tests, strengthens build-time and runtime diagnostics, and improves UX for option types and manual documentation. Key outcomes include updated frontend documentation, robust test infrastructure, renamed graph conventions for TH, safer typedef handling, and enhanced trace formatting.
June 2025
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Quality Metrics
Correctness91.8%
Maintainability89.4%
Architecture89.4%
Performance85.6%
AI Usage23.2%
Skills & Technologies
Programming Languages
BashCCabalHaskellJSONMakefileMarkdownNixRustShell
Technical Skills
API DesignAST ManipulationAbstract Syntax Tree (AST) ManipulationBackend DevelopmentBuild AutomationBuild ConfigurationBuild OptimizationBuild Process ManagementBuild ScriptingBuild SystemBuild System ConfigurationBuild System IntegrationBuild SystemsBuild ToolsBuild Tools Integration
Repositories Contributed To
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