agda/agda
Jul 2025 – Apr 2026
5 Months active
Languages Used
HaskellGitNixEmacs Lisp
Technical Skills
Algorithm OptimizationBit ManipulationCompiler DevelopmentCompiler OptimizationData Structure OptimizationData Structures
Reed Mullanix
PROFILE
Reed Mullanix
Worked on the agda/agda repository, delivering core compiler optimizations, Emacs integration enhancements, and developer experience improvements over five months. Focused on Haskell and Emacs Lisp, the work included refactoring the Agda type checker for single-pass dependency analysis, overhauling data structures like VarSet for bitvector efficiency, and optimizing memory management to reduce space leaks. Enhanced the Agda2-mode Emacs interface by improving syntax highlighting, goal handling, and error navigation, while also addressing race conditions and buffer management. Contributed to build system flexibility with Cabal and Nix, improved documentation, and streamlined environment management to support maintainable, robust workflows for contributors.
Overall Statistics
Feature vs Bugs
71%Features
Repository Contributions
26Total
Bugs
4
Commits
26
Features
10
Lines of code
3,190
Activity Months5
Your Network
42 peopleWork History
April 2026
6 Commits • 2 Features
Apr 1, 2026April 2026 performance summary for agda/agda focusing on Emacs integration (Agda2 mode). Delivered targeted UX and robustness improvements in the Emacs workflow, with a strong emphasis on reliable goal handling, precise error navigation, and quality improvements in the Agda2-mode ecosystem. The work reduced editing friction, improved syntax awareness, and strengthened maintainability through focused refactors and documentation updates.
6 Commits • 2 Features
Apr 1, 2026April 2026 performance summary for agda/agda focusing on Emacs integration (Agda2 mode). Delivered targeted UX and robustness improvements in the Emacs workflow, with a strong emphasis on reliable goal handling, precise error navigation, and quality improvements in the Agda2-mode ecosystem. The work reduced editing friction, improved syntax awareness, and strengthened maintainability through focused refactors and documentation updates.
April 2026
March 2026
7 Commits • 2 Features
Mar 1, 2026March 2026: Focused on enhancing the Agda Emacs integration (agda2-mode) and improving Cabal-based workflow flexibility to support diverse toolchains (Nix/Guix). Delivered user experience improvements, stability fixes, and environment-first build configurations that reduce friction in day-to-day development and improve reliability for both contributors and downstream tooling.
March 2026
7 Commits • 2 Features
Mar 1, 2026March 2026: Focused on enhancing the Agda Emacs integration (agda2-mode) and improving Cabal-based workflow flexibility to support diverse toolchains (Nix/Guix). Delivered user experience improvements, stability fixes, and environment-first build configurations that reduce friction in day-to-day development and improve reliability for both contributors and downstream tooling.
December 2025
1 Commits • 1 Features
Dec 1, 2025December 2025 monthly summary for agda/agda focusing on developer experience improvements and repository hygiene.
1 Commits • 1 Features
Dec 1, 2025December 2025 monthly summary for agda/agda focusing on developer experience improvements and repository hygiene.
December 2025
August 2025
5 Commits • 2 Features
Aug 1, 2025August 2025 — agda/agda: Performance optimization, readability improvements, and better documentation. Delivered inlining and strict IO changes to core data structures (Null/Collection/Singleton) and related memory optimizations to reduce laziness-related space leaks and memory pressure. Also unified set operations to use Null/Singleton utilities across modules and improved VarSet documentation for clarity. These changes yield faster build times, lower memory usage, and improved maintainability. Commit highlights include core optimizations: e2b68b27f1434a23b81a0860e133a0da4c51549d; beec4e7450097ec5a2167403ef378be06bc8d147; bd2ae180b8a2debd21886baff7f9044510dd3450; readability improvements: 806cd4eeb0f3df2fbbe44e91541702f3fcdfa0bf; docs enhancements: a77e499152c23a4df85dea244c15d162a09fd7de.
August 2025
5 Commits • 2 Features
Aug 1, 2025August 2025 — agda/agda: Performance optimization, readability improvements, and better documentation. Delivered inlining and strict IO changes to core data structures (Null/Collection/Singleton) and related memory optimizations to reduce laziness-related space leaks and memory pressure. Also unified set operations to use Null/Singleton utilities across modules and improved VarSet documentation for clarity. These changes yield faster build times, lower memory usage, and improved maintainability. Commit highlights include core optimizations: e2b68b27f1434a23b81a0860e133a0da4c51549d; beec4e7450097ec5a2167403ef378be06bc8d147; bd2ae180b8a2debd21886baff7f9044510dd3450; readability improvements: 806cd4eeb0f3df2fbbe44e91541702f3fcdfa0bf; docs enhancements: a77e499152c23a4df85dea244c15d162a09fd7de.
July 2025
7 Commits • 3 Features
Jul 1, 2025July 2025 (2025-07) performance and deliverables summary for agda/agda. Delivered major features that improve compile-time performance, correctness, and maintainability, with comprehensive testing to ensure long-term robustness. Key outcomes include a stack-based Module Checkpointing overhaul with UNPACK optimization, corrected checkpoint unwinding, and a test for interleaved modules within records and fields; a refactored Agda Type Checker telescope dependency analysis using single-pass algorithms with lazy processing, plus new utilities (flattenRevTel, allDependencies) and property tests for telescope operations; and a VarSet overhaul to a bitvector-based representation via Agda.Utils.ByteArray, with inlining adjusted to INLINABLE and property tests validating behavior against IntSet.
7 Commits • 3 Features
Jul 1, 2025July 2025 (2025-07) performance and deliverables summary for agda/agda. Delivered major features that improve compile-time performance, correctness, and maintainability, with comprehensive testing to ensure long-term robustness. Key outcomes include a stack-based Module Checkpointing overhaul with UNPACK optimization, corrected checkpoint unwinding, and a test for interleaved modules within records and fields; a refactored Agda Type Checker telescope dependency analysis using single-pass algorithms with lazy processing, plus new utilities (flattenRevTel, allDependencies) and property tests for telescope operations; and a VarSet overhaul to a bitvector-based representation via Agda.Utils.ByteArray, with inlining adjusted to INLINABLE and property tests validating behavior against IntSet.
July 2025
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Quality Metrics
Correctness94.6%
Maintainability86.8%
Architecture86.2%
Performance87.0%
AI Usage20.8%
Skills & Technologies
Programming Languages
Emacs LispGitHaskellNix
Technical Skills
Algorithm OptimizationBit ManipulationBuild SystemsCabalCode ReadabilityCode RefactoringCode refactoringCompiler DevelopmentCompiler InternalsCompiler OptimizationCompiler OptimizationsConcurrencyConcurrency handlingData Structure OptimizationData Structures
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