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Kengo Hirata

PROFILE

Kengo Hirata

Worked on enhancing quantum programming workflows by developing experimental modifier support in the Guppy language within the CQCL/guppylang repository, enabling more expressive quantum circuit descriptions through AST to CFG lowering and type checking. Leveraged Python and Rust to implement AST utilities, extend the CFG builder, and introduce modifier-related error tests. In the CQCL/tket2 repository, contributed to Hugr/Tket integration by adding comprehensive handling for modifiers and global phases, including extension operations and a resolver for circuit rewriting and gate decomposition. This work established a foundation for richer control-flow constructs and streamlined circuit transformations, reducing future rework and accelerating feature delivery.

Overall Statistics

Feature vs Bugs

100%Features

Repository Contributions

4Total
Bugs
0
Commits
4
Features
2
Lines of code
6,104
Activity Months1

Work History

October 2025

4 Commits • 2 Features

Oct 1, 2025

October 2025 — Cross-repo progress on language expressiveness and circuit tooling for quantum workflows. Key features delivered across CQCL/guppylang and CQCL/tket2 include experimental modifiers support in Guppy language (AST to CFG lowering and type checking) and enhanced modifier/global phase handling in Hugr/Tket integration, setting the stage for richer control-flow constructs and more robust circuit transformations. No major bug fixes documented for this period. The work emphasizes business value through increased expressiveness, easier circuit rewrites, and a more unified representation of modifiers/global phases, reducing future rework and accelerating feature delivery.

Activity

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Quality Metrics

Correctness82.6%
Maintainability80.0%
Architecture85.0%
Performance67.6%
AI Usage30.0%

Skills & Technologies

Programming Languages

PythonRust

Technical Skills

Abstract Syntax TreesAbstract Syntax Trees (AST)Algorithm ImplementationCircuit ManipulationCircuit SynthesisCompiler DesignCompiler DevelopmentControl Flow Graphs (CFG)Extension DevelopmentGraph TheoryMetaprogrammingPythonPython ProgrammingQuantum ComputingQuantum Computing Languages

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

CQCL/tket2

Oct 2025 Oct 2025
1 Month active

Languages Used

PythonRust

Technical Skills

Abstract Syntax TreesAlgorithm ImplementationCircuit ManipulationCircuit SynthesisCompiler DesignCompiler Development

CQCL/guppylang

Oct 2025 Oct 2025
1 Month active

Languages Used

Python

Technical Skills

Abstract Syntax Trees (AST)Compiler DevelopmentControl Flow Graphs (CFG)Quantum Computing LanguagesType Checking