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Cody Gunton

PROFILE

Cody Gunton

Cody Gunton developed advanced zero-knowledge proof infrastructure and RISC-V emulation features across AztecProtocol/aztec-packages and risc0/zirgen, focusing on reliability, performance, and developer experience. He engineered recursive proving systems, browser-based benchmarking, and robust API workflows using C++, TypeScript, and WASM, optimizing memory usage and test coverage. Cody refactored circuit verification, improved CLI tooling, and enhanced error handling to streamline integration and debugging. His work on RISC-V emulation and circuit design addressed instruction fidelity and compatibility, enabling realistic workloads and stable verification. Through careful code maintenance and benchmarking, Cody delivered scalable, maintainable systems that improved test stability and onboarding efficiency.

Overall Statistics

Feature vs Bugs

74%Features

Repository Contributions

33Total
Bugs
6
Commits
33
Features
17
Lines of code
344,612
Activity Months7

Work History

September 2025

4 Commits • 2 Features

Sep 1, 2025

September 2025 performance summary focusing on RISC-V emulation and circuit accuracy improvements across two repos. Delivered core architectural fixes and feature support that improve compatibility, correctness, and cryptographic/verification readiness, enabling more realistic workloads and stable golden data. Highlights: - Implemented FENCE support in the RISC-V emulator and circuit paths, enabling proper instruction sequencing and state management; updated golden hashes to reflect changes; integrates with ControlUserEcallOrFence for consistent PC advancement and state handling. - Fixed jalr instruction handling and decoding in the emulator; corrected immediate/register combination and masking logic to ensure correct behavior. - Extended RISC-V fence support in the riscv0/risc0 circuit with PolyExtStep additions and related register operations, improving broader RISC-V compatibility. - Corrected JALR misalignment and circuit logic in the riscv0/risc0 verifier/test data, strengthening end-to-end correctness. Impact: - Higher fidelity emulation and hardware-circuit parity for RISC-V workloads. - More reliable verification data and faster onboarding of workloads that rely on fence and jalr semantics. - Clear traceability with commits that map to each delivered capability.

May 2025

4 Commits • 2 Features

May 1, 2025

May 2025 monthly summary focusing on key accomplishments across ethereum/execution-specs and ethereum/execution-spec-tests. Delivered targeted tests for opcodes and fixed deployment bytes handling, improving VM reliability, test coverage, and deployment resilience. Enabled safer upgrades and more robust validation of execution environment.

March 2025

3 Commits • 3 Features

Mar 1, 2025

March 2025 monthly summary for AztecProtocol/aztec-packages focusing on three high-impact enhancements across auditing tooling, issue governance, and cryptographic translator performance. Delivered improvements emphasize business value through more accurate audits, cleaner code references, and scalable kernel execution capacity with optimized memory usage.

February 2025

6 Commits • 2 Features

Feb 1, 2025

February 2025 (AztecProtocol/aztec-packages) delivered key reliability enhancements and usability improvements across the WASM-backed AztecClientBackend and Barretenberg integration. Key features delivered include exposing IVC circuit sizes via gates() and a comprehensive CLI/API overhaul for Barretenberg, while major bugs were fixed in the verifier signaling path and the verifier relation accumulation/skip logic. The changes improve test stability, observability, and developer experience, reinforcing end-to-end reliability of the verifier/packer workflow. Technologies demonstrated include WASM, C++, CLI11, integration testing, and robust error signaling. Business impact: reduced flaky tests, improved debugging visibility, faster onboarding, and smoother release cycles.

January 2025

4 Commits • 2 Features

Jan 1, 2025

January 2025 monthly summary for AztecProtocol/aztec-packages focused on delivering performance-oriented features, improving build efficiency, and strengthening benchmarking infrastructure. The work emphasizes business value through faster builds, browser-based benchmarking readiness, and scalable recursive proving support.

December 2024

3 Commits • 2 Features

Dec 1, 2024

Monthly summary for 2024-12 focusing on delivered features, major fixes, and business/technical impact for AztecProtocol/aztec-packages. Highlights include the client-side proof workflow enhancements and testing optimizations that reduce CI time and resource usage, enabling faster go-to-market for client integrations.

November 2024

9 Commits • 4 Features

Nov 1, 2024

Concise monthly summary for 2024-11 focusing on business value and technical achievements for AztecProtocol/aztec-packages. Key outcomes: - Expanded browser-based testing for ClientIVC (bb.js) with new TypeScript backends, enhanced logging, and CI visibility improvements. - Introduced memory benchmarking for mega circuit builder/decider to surface real-world memory bottlenecks and optimize circuit construction. - API consolidation: merged multiple ClientIVC verification keys into a single VerificationKey struct, simplifying usage and reducing parameter passing; browser tests updated to display logs on page for debugging. - Runtime introspection improved with trace structure refactor from enum to object to expose block size information. - CI stability: macOS logging/printing issues fixed, CI/test changes reverted to restore stable merge checks and notifications. Impact: - Higher test coverage and reliability for ClientIVC workflows. - Clearer API design reduces developer friction and potential integration errors. - Early detection of memory inefficiencies enables targeted performance improvements. - More robust CI/CD reduces downtime and accelerates merge readiness. Technologies and skills demonstrated: - TypeScript backends and bb.js-based browser testing - C++ logging enhancements and runtime instrumentation - Performance benchmarking and memory analysis - API design simplification and refactoring - CI/CD discipline across macOS and cross-platform environments

Activity

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Quality Metrics

Correctness89.2%
Maintainability86.6%
Architecture87.6%
Performance79.4%
AI Usage20.0%

Skills & Technologies

Programming Languages

C++CMakeJavaScriptMarkdownPythonRustShellTypeScriptYAMLZIR

Technical Skills

API DesignAPI DevelopmentBackend DevelopmentBenchmarkingBrowser IntegrationBuild System (CMake)Build System ConfigurationBuild SystemsC++C++ DevelopmentCI/CDCLI DevelopmentCMakeCircuit DesignCircuit design

Repositories Contributed To

5 repos

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

AztecProtocol/aztec-packages

Nov 2024 Mar 2025
5 Months active

Languages Used

C++JavaScriptShellTypeScriptYAMLPythonCMakeMarkdown

Technical Skills

API DesignBenchmarkingBrowser IntegrationBuild System ConfigurationBuild SystemsC++

ethereum/execution-specs

May 2025 May 2025
1 Month active

Languages Used

Python

Technical Skills

EVM DevelopmentPython ScriptingSmart Contract DevelopmentSmart Contract TestingTesting

ethereum/execution-spec-tests

May 2025 May 2025
1 Month active

Languages Used

Python

Technical Skills

EVMPythonPython DevelopmentSmart Contract TestingZKEVM

risc0/zirgen

Sep 2025 Sep 2025
1 Month active

Languages Used

C++ZIRzir

Technical Skills

Circuit DesignEmulator DevelopmentLow-Level ProgrammingRISC-V

risc0/risc0

Sep 2025 Sep 2025
1 Month active

Languages Used

Rust

Technical Skills

Circuit designCryptographyLow-level programmingRISC-VRISC-V architectureZero-knowledge proofs

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