starkware-libs/stwo-cairo
Nov 2024 – Oct 2025
9 Months active
Languages Used
RustAssemblyPythonCairocairoTOMLYAML
Technical Skills
CairoCairo VMLow-level programmingProver DevelopmentRustType system
anatg
PROFILE
Anatg
Anat worked on the starkware-libs/stwo-cairo repository, delivering core features and maintenance for the Cairo prover and related cryptographic tooling. Over nine months, Anat implemented enhancements such as BigUInt configurability, Poseidon constants modules, and robust serialization for BigUint values, focusing on performance, maintainability, and correctness. Using Rust, Cairo, and TOML, Anat refactored constraint logic, streamlined range checks, and improved test workflows through CI/CD and conditional compilation. The work included critical bug fixes, code quality improvements, and dependency management, ensuring reliable proof generation and future extensibility. Anat’s contributions demonstrated depth in low-level programming, cryptography, and system design.
Overall Statistics
Feature vs Bugs
85%Features
Repository Contributions
35Total
Bugs
3
Commits
35
Features
17
Lines of code
2,750,510
Activity Months9
Your Network
84 people
Work History
October 2025
9 Commits • 2 Features
Oct 1, 2025In Oct 2025, starkware-libs/stwo-cairo delivered major prover core improvements and essential codebase cleanup, boosting proof speed, correctness, and maintainability. Key features included prover core correctness and performance enhancements across Blake hashing, bitwise XOR verification, Poseidon optimization, verify_add_252, and a range check upgrade to rc20, with AIR version alignment. The AIR upgrade to 010cd4dd and migration from rc19 to rc20, along with removal of max_constraint_log_degree_bound, streamlined constraints and future optimization. Codebase cleanup removed the adapted_prover crate and related vm_utils/vm_imports, simplifying constraint degree handling and aligning with sharp7. These changes reduce maintenance burden and establish a solid foundation for future performance work.
9 Commits • 2 Features
Oct 1, 2025In Oct 2025, starkware-libs/stwo-cairo delivered major prover core improvements and essential codebase cleanup, boosting proof speed, correctness, and maintainability. Key features included prover core correctness and performance enhancements across Blake hashing, bitwise XOR verification, Poseidon optimization, verify_add_252, and a range check upgrade to rc20, with AIR version alignment. The AIR upgrade to 010cd4dd and migration from rc19 to rc20, along with removal of max_constraint_log_degree_bound, streamlined constraints and future optimization. Codebase cleanup removed the adapted_prover crate and related vm_utils/vm_imports, simplifying constraint degree handling and aligning with sharp7. These changes reduce maintenance burden and establish a solid foundation for future performance work.
October 2025
September 2025
1 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary focusing on code quality and dependency management for starkware-libs/stwo-cairo. Delivered an AIR version bump across the cairo-air crate and related components, along with clippy configuration updates to enforce coding standards. The changes reduce runtime risk, improve maintainability, and align with Starkware's quality bar.
September 2025
1 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary focusing on code quality and dependency management for starkware-libs/stwo-cairo. Delivered an AIR version bump across the cairo-air crate and related components, along with clippy configuration updates to enforce coding standards. The changes reduce runtime risk, improve maintainability, and align with Starkware's quality bar.
August 2025
3 Commits • 1 Features
Aug 1, 2025August 2025: Maintained stability and improved maintainability for Cairo prover tooling and Casm, delivering AIR version alignment with a refactor of witness structures, and a critical fix to Casm registry component ordering. Emphasis on reducing future maintenance burden, improving consistency across the codebase, and ensuring deterministic interpretation by downstream tooling.
3 Commits • 1 Features
Aug 1, 2025August 2025: Maintained stability and improved maintainability for Cairo prover tooling and Casm, delivering AIR version alignment with a refactor of witness structures, and a critical fix to Casm registry component ordering. Emphasis on reducing future maintenance burden, improving consistency across the codebase, and ensuring deterministic interpretation by downstream tooling.
August 2025
June 2025
5 Commits • 2 Features
Jun 1, 2025June 2025 monthly summary for starkware-libs/stwo-cairo. Key features delivered include Poseidon-based verifier configurability with feature flags and test initializations, enabling conditional compilation (poseidon252_verifier), explicit test feature flags, and prover command adjustments (qm31_opcode) to ensure correct component initialization. Also, CI/test workflow optimization and cryptographic project configs: updated CI timeouts, test configurations, and introduced new TOML config files for blake_cairo_project and poseidon_cairo_project to enable running Cairo code with different cryptographic primitives. Major bug fixed: Cairo verifier range check data state fix, introducing new fields in CairoAirNewImpl to initialize range check components (rc_9_9_b through rc_9_9_h) to preserve verifier state post-rebase. Impact: Faster iteration on cryptographic backends, more reliable test runs, reduced risk from rebase-related state drift. Technologies/skills demonstrated: Rust feature flags and conditional compilation, build/test automation, CI configuration (toml-based projects), and verifier state management.
June 2025
5 Commits • 2 Features
Jun 1, 2025June 2025 monthly summary for starkware-libs/stwo-cairo. Key features delivered include Poseidon-based verifier configurability with feature flags and test initializations, enabling conditional compilation (poseidon252_verifier), explicit test feature flags, and prover command adjustments (qm31_opcode) to ensure correct component initialization. Also, CI/test workflow optimization and cryptographic project configs: updated CI timeouts, test configurations, and introduced new TOML config files for blake_cairo_project and poseidon_cairo_project to enable running Cairo code with different cryptographic primitives. Major bug fixed: Cairo verifier range check data state fix, introducing new fields in CairoAirNewImpl to initialize range check components (rc_9_9_b through rc_9_9_h) to preserve verifier state post-rebase. Impact: Faster iteration on cryptographic backends, more reliable test runs, reduced risk from rebase-related state drift. Technologies/skills demonstrated: Rust feature flags and conditional compilation, build/test automation, CI configuration (toml-based projects), and verifier state management.
May 2025
8 Commits • 5 Features
May 1, 2025Month: 2025-05 — Starkware-stwo-cairo: Key features delivered and reliability improvements across JSON serialization, channel interactions, preprocessed trace simplification, built-ins enhancements, and Poseidon verifier support. These changes improve maintainability, testing, and production readiness while reducing noise and complexity in the Cairo prover stack.
8 Commits • 5 Features
May 1, 2025Month: 2025-05 — Starkware-stwo-cairo: Key features delivered and reliability improvements across JSON serialization, channel interactions, preprocessed trace simplification, built-ins enhancements, and Poseidon verifier support. These changes improve maintainability, testing, and production readiness while reducing noise and complexity in the Cairo prover stack.
May 2025
April 2025
3 Commits • 2 Features
Apr 1, 2025April 2025: Align stwo-cairo with latest library revisions and deliver performance-focused prover enhancements. The month focused on keeping dependencies current, improving constraint logic, and enabling faster, more maintainable proof generation for Cairo-based components.
April 2025
3 Commits • 2 Features
Apr 1, 2025April 2025: Align stwo-cairo with latest library revisions and deliver performance-focused prover enhancements. The month focused on keeping dependencies current, improving constraint logic, and enabling faster, more maintainable proof generation for Cairo-based components.
March 2025
1 Commits • 1 Features
Mar 1, 2025March 2025 — Delivered BigUint serialization/deserialization support in stwo-cairo, enabling serde-based persistence and data interchange for BigUint values. This work establishes a foundation for JSON persistence and cross-system data sharing. No major bugs reported this month; focus was on data interoperability and maintainability, aligned with the project roadmap.
1 Commits • 1 Features
Mar 1, 2025March 2025 — Delivered BigUint serialization/deserialization support in stwo-cairo, enabling serde-based persistence and data interchange for BigUint values. This work establishes a foundation for JSON persistence and cross-system data sharing. No major bugs reported this month; focus was on data interoperability and maintainability, aligned with the project roadmap.
March 2025
February 2025
3 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary focusing on delivering critical correctness fixes and performance-oriented enhancements for the Cairo prover. The team shipped a Poseidon constants module with preprocessed round keys and related operations, added constants tables and deduce_output capabilities, and fixed a key BigUInt type formatting bug to improve type representation. These changes reduce runtime errors, improve prover performance, and enhance maintainability through structured constants and thorough testing.
February 2025
3 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary focusing on delivering critical correctness fixes and performance-oriented enhancements for the Cairo prover. The team shipped a Poseidon constants module with preprocessed round keys and related operations, added constants tables and deduce_output capabilities, and fixed a key BigUInt type formatting bug to improve type representation. These changes reduce runtime errors, improve prover performance, and enhance maintainability through structured constants and thorough testing.
November 2024
2 Commits • 2 Features
Nov 1, 2024November 2024 monthly summary for starkware-libs/stwo-cairo: delivered feature enhancements expanding ProverType configurability and cross-crate M31 access, laying groundwork for broader BigUInt support and M31 arithmetic usage across the prover system. No explicit bug fixes were recorded in this period.
2 Commits • 2 Features
Nov 1, 2024November 2024 monthly summary for starkware-libs/stwo-cairo: delivered feature enhancements expanding ProverType configurability and cross-crate M31 access, laying groundwork for broader BigUInt support and M31 arithmetic usage across the prover system. No explicit bug fixes were recorded in this period.
November 2024
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Quality Metrics
Correctness90.4%
Maintainability91.4%
Architecture89.8%
Performance85.2%
AI Usage20.0%
Skills & Technologies
Programming Languages
AssemblyCairoPythonRustTOMLYAMLcairo
Technical Skills
AIRAlgorithm implementationBackend DevelopmentBigIntBitwise OperationsBuild System ManagementBuild SystemsCI/CDCairoCairo DevelopmentCairo VMCairo programmingCargoCode QualityCode Refactoring
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