starkware-libs/sequencer
Nov 2024 – Mar 2026
14 Months active
Languages Used
RustBUILDGit ConfigurationYAMLPythonJavaScriptDockerfilecairo
Technical Skills
Build SystemsCLI DevelopmentCachingCairoCairo NativeCargo
Avi Cohen
PROFILE
Avi Cohen
Avi Cohen engineered core backend infrastructure for the starkware-libs/sequencer repository, focusing on modularizing the Cairo native compilation pipeline, modernizing build systems, and enhancing the StarkNet OS Runner for scalable, secure proof generation. He refactored and centralized compilation utilities, introduced robust caching and resource management, and migrated server components from Axum REST to a JSON-RPC backend using Rust and Docker. Avi implemented cryptographic utilities, improved error handling, and strengthened CI/CD reliability, enabling faster iteration and safer deployments. His work demonstrated depth in Rust, build automation, and cryptography, resulting in a maintainable, testable codebase that supports high-throughput blockchain operations.
Overall Statistics
Feature vs Bugs
83%Features
Repository Contributions
120Total
Bugs
13
Commits
120
Features
64
Lines of code
33,724
Activity Months14
Your Network
121 peopleWork History
March 2026
30 Commits • 17 Features
Mar 1, 2026Concise monthly summary for 2026-03 covering StarkNet OS Runner and Transaction Prover work, highlighting delivered features, fixed bugs, architectural improvements, and value to reliability, performance, and developer experience.
30 Commits • 17 Features
Mar 1, 2026Concise monthly summary for 2026-03 covering StarkNet OS Runner and Transaction Prover work, highlighting delivered features, fixed bugs, architectural improvements, and value to reliability, performance, and developer experience.
March 2026
February 2026
16 Commits • 4 Features
Feb 1, 2026February 2026 was focused on delivering a secure, modular, and scalable StarkNet OS Runner in starkware-libs/sequencer, with a strong emphasis on reliability, testing, and client-facing interoperability. Key architectural work introduced a generic RunnerFactory, modular prover configuration, and a JSON-RPC backend, enabling interchangeable runners and easier testing and client interaction. The server migrated from Axum REST to a jsonrpsee-based JSON-RPC interface, exposing health and proveTransaction endpoints and enabling new integration patterns for StarkNet clients. Security hardened with configurable CORS origins and a dedicated middleware, backed by unit tests. Prover tooling was aligned with the latest dependencies and gated behind stable Rust features for safe builds. Deployment and reliability improvements included a self-contained Docker image, concurrency controls, enhanced logging, and cleanup of deprecated dead server code. Critical correctness issues were fixed, including Blake program hash calculation and prover/verifier version alignment, reducing risk of data integrity issues and build/install inconsistencies.
February 2026
16 Commits • 4 Features
Feb 1, 2026February 2026 was focused on delivering a secure, modular, and scalable StarkNet OS Runner in starkware-libs/sequencer, with a strong emphasis on reliability, testing, and client-facing interoperability. Key architectural work introduced a generic RunnerFactory, modular prover configuration, and a JSON-RPC backend, enabling interchangeable runners and easier testing and client interaction. The server migrated from Axum REST to a jsonrpsee-based JSON-RPC interface, exposing health and proveTransaction endpoints and enabling new integration patterns for StarkNet clients. Security hardened with configurable CORS origins and a dedicated middleware, backed by unit tests. Prover tooling was aligned with the latest dependencies and gated behind stable Rust features for safe builds. Deployment and reliability improvements included a self-contained Docker image, concurrency controls, enhanced logging, and cleanup of deprecated dead server code. Critical correctness issues were fixed, including Blake program hash calculation and prover/verifier version alignment, reducing risk of data integrity issues and build/install inconsistencies.
January 2026
24 Commits • 20 Features
Jan 1, 2026January 2026 monthly summary for starkware-libs/sequencer: delivered core features to accelerate the proving workflow, improved infra reliability, and expanded HTTP server scaffolding for on-chain proofs. The work focused on modularizing the proving pipeline (moving stwo_run_and_prove into proving_utils, adding the proving_utils crate, and wrapper modules), accelerating end-to-end tests (blockifier transfers tests speed up from 30s to 3s), and delivering foundational HTTP/server components and configuration types for the upcoming proving service. Business impact: reduced time-to-validate changes, increased test throughput, and a more maintainable, scalable architecture for StarkNet OS proving.
24 Commits • 20 Features
Jan 1, 2026January 2026 monthly summary for starkware-libs/sequencer: delivered core features to accelerate the proving workflow, improved infra reliability, and expanded HTTP server scaffolding for on-chain proofs. The work focused on modularizing the proving pipeline (moving stwo_run_and_prove into proving_utils, adding the proving_utils crate, and wrapper modules), accelerating end-to-end tests (blockifier transfers tests speed up from 30s to 3s), and delivering foundational HTTP/server components and configuration types for the upcoming proving service. Business impact: reduced time-to-validate changes, increased test throughput, and a more maintainable, scalable architecture for StarkNet OS proving.
January 2026
December 2025
3 Commits • 1 Features
Dec 1, 2025December 2025 (2025-12) monthly summary for starkware-libs/sequencer. Focused updates include a Cairo-native dependency upgrade to 0.7.3 with accompanying cleanup, and strengthened error handling to improve reliability of error conversion. These changes enhance compatibility, stability, and maintainability in the execution path, delivering clear business value through fewer failure modes and easier future maintenance.
December 2025
3 Commits • 1 Features
Dec 1, 2025December 2025 (2025-12) monthly summary for starkware-libs/sequencer. Focused updates include a Cairo-native dependency upgrade to 0.7.3 with accompanying cleanup, and strengthened error handling to improve reliability of error conversion. These changes enhance compatibility, stability, and maintainability in the execution path, delivering clear business value through fewer failure modes and easier future maintenance.
September 2025
3 Commits • 2 Features
Sep 1, 2025Concise monthly summary for 2025-09 focused on security-oriented feature delivery, test coverage, and key-management improvements in starkware-libs/sequencer. Delivered cryptography utilities and governance-aligned tests for StarkNet OS, and hardened key management by implementing symmetric key encryption using EC-derived shared secrets and Blake2s. Updated dependencies to support cryptographic utilities, enhancing reliability, test coverage, and security posture. The work reduces data exposure risk, improves deployment confidence, and demonstrates growth in security engineering and cryptography skills.
3 Commits • 2 Features
Sep 1, 2025Concise monthly summary for 2025-09 focused on security-oriented feature delivery, test coverage, and key-management improvements in starkware-libs/sequencer. Delivered cryptography utilities and governance-aligned tests for StarkNet OS, and hardened key management by implementing symmetric key encryption using EC-derived shared secrets and Blake2s. Updated dependencies to support cryptographic utilities, enhancing reliability, test coverage, and security posture. The work reduces data exposure risk, improves deployment confidence, and demonstrates growth in security engineering and cryptography skills.
September 2025
August 2025
2 Commits • 1 Features
Aug 1, 2025Concise monthly summary for 2025-08 focusing on features delivered and bugs fixed in starkware-libs/sequencer. Delivered notable improvements in monitoring, reliability, and data correctness with targeted changes to the Apollo consensus orchestration and Cairo native whitelist handling.
August 2025
2 Commits • 1 Features
Aug 1, 2025Concise monthly summary for 2025-08 focusing on features delivered and bugs fixed in starkware-libs/sequencer. Delivered notable improvements in monitoring, reliability, and data correctness with targeted changes to the Apollo consensus orchestration and Cairo native whitelist handling.
July 2025
4 Commits • 2 Features
Jul 1, 2025July 2025 focused on delivering robust Cairo native compilation support for the Sequencer repo and simplifying build and dependency management. Improvements in tooling and build orchestration reduced build friction and increased reliability in CI/local environments, enabling faster release cycles and more predictable deployments.
4 Commits • 2 Features
Jul 1, 2025July 2025 focused on delivering robust Cairo native compilation support for the Sequencer repo and simplifying build and dependency management. Improvements in tooling and build orchestration reduced build friction and increased reliability in CI/local environments, enabling faster release cycles and more predictable deployments.
July 2025
June 2025
3 Commits • 2 Features
Jun 1, 2025June 2025 performance-focused update for starkware-libs/sequencer: Delivered dependency modernization, enhanced execution visibility, and improved release hygiene. Key fixes and features reduce build risk, align with Cairo native upgrades, and enable precise tracing of Cairo Native execution paths.
June 2025
3 Commits • 2 Features
Jun 1, 2025June 2025 performance-focused update for starkware-libs/sequencer: Delivered dependency modernization, enhanced execution visibility, and improved release hygiene. Key fixes and features reduce build risk, align with Cairo native upgrades, and enable precise tracing of Cairo Native execution paths.
April 2025
13 Commits • 3 Features
Apr 1, 2025April 2025 monthly summary for starkware-libs/sequencer focused on structural modernization, CI reliability, and visibility enhancements that improve maintainability, build reliability, and runtime insight. Key work centered on Sierra compilation tooling modernization and naming consolidation, CI stability and merge conflict resolution, and Blockifier observability enhancements.
13 Commits • 3 Features
Apr 1, 2025April 2025 monthly summary for starkware-libs/sequencer focused on structural modernization, CI reliability, and visibility enhancements that improve maintainability, build reliability, and runtime insight. Key work centered on Sierra compilation tooling modernization and naming consolidation, CI stability and merge conflict resolution, and Blockifier observability enhancements.
April 2025
March 2025
5 Commits • 4 Features
Mar 1, 2025March 2025 monthly summary for starkware-libs/sequencer: focused on cross-platform build stability, test reliability, and dependency health to enable faster, safer releases with predictable CI behavior and reduced merge conflicts. Key features delivered include Unix-specific resource limits with a dedicated module in starknet_sierra_multicompile and a Windows no-op fallback, plus a CI workflow update to upload artifacts; a new test utility toml_test_utils to validate starknet-native-compile version against workspace version and refactor tests to use it; centralization of OS input loading via get_execution_helper_and_syscall_handlers in the hint logic for better maintainability; and dependency maintenance upgrading cairo-native to 0.3.4 and aligning cairo-lang crates and windows-sys versions to main to stabilize CI and reduce merge conflicts.
March 2025
5 Commits • 4 Features
Mar 1, 2025March 2025 monthly summary for starkware-libs/sequencer: focused on cross-platform build stability, test reliability, and dependency health to enable faster, safer releases with predictable CI behavior and reduced merge conflicts. Key features delivered include Unix-specific resource limits with a dedicated module in starknet_sierra_multicompile and a Windows no-op fallback, plus a CI workflow update to upload artifacts; a new test utility toml_test_utils to validate starknet-native-compile version against workspace version and refactor tests to use it; centralization of OS input loading via get_execution_helper_and_syscall_handlers in the hint logic for better maintainability; and dependency maintenance upgrading cairo-native to 0.3.4 and aligning cairo-lang crates and windows-sys versions to main to stabilize CI and reduce merge conflicts.
February 2025
1 Commits • 1 Features
Feb 1, 2025February 2025 monthly work summary for starkware-libs/sequencer focused on repo hygiene and maintainability. Delivered a cleanup that reduces maintenance overhead and aligns the codebase with current build strategy. Specifically removed the starknet-native-compile binary crate and cleaned up build artifacts to simplify the project structure, laying groundwork for future refactors and faster CI iterations.
1 Commits • 1 Features
Feb 1, 2025February 2025 monthly work summary for starkware-libs/sequencer focused on repo hygiene and maintainability. Delivered a cleanup that reduces maintenance overhead and aligns the codebase with current build strategy. Specifically removed the starknet-native-compile binary crate and cleaned up build artifacts to simplify the project structure, laying groundwork for future refactors and faster CI iterations.
February 2025
January 2025
6 Commits • 3 Features
Jan 1, 2025January 2025 performance summary for starkware-libs/sequencer. Delivered major improvements to native Cairo compilation tooling, artifact publishing/exposure for native Cairo blockifier, and developer workflow automation, resulting in more reliable builds, faster local testing, and streamlined CI/CD integration.
January 2025
6 Commits • 3 Features
Jan 1, 2025January 2025 performance summary for starkware-libs/sequencer. Delivered major improvements to native Cairo compilation tooling, artifact publishing/exposure for native Cairo blockifier, and developer workflow automation, resulting in more reliable builds, faster local testing, and streamlined CI/CD integration.
December 2024
6 Commits • 3 Features
Dec 1, 2024December 2024 — Sequencer (starkware-libs/sequencer) delivered stability and architectural enhancements for native Cairo builds and Sierra-to-native compilation with clear business value: more reliable builds, faster iteration, and configurable native paths across the stack.
6 Commits • 3 Features
Dec 1, 2024December 2024 — Sequencer (starkware-libs/sequencer) delivered stability and architectural enhancements for native Cairo builds and Sierra-to-native compilation with clear business value: more reliable builds, faster iteration, and configurable native paths across the stack.
December 2024
November 2024
4 Commits • 1 Features
Nov 1, 2024November 2024 monthly summary for starkware-libs/sequencer: Delivered Cairo native compilation integration to accelerate contract builds and enable a native execution path. Implemented a new Cairo native binary crate and wired native path through CommandLineCompiler via the cairo_native feature flag, with caching/manager components (GlobalContractCacheManager and ContractClassManager) to support asynchronous native compilation and multiple contract representations. Added a batcher compiler struct to optimize batch compilation throughput. These changes provide faster, scalable compilation, enable multiple contract representations, and lay a solid foundation for a production-ready native path.
November 2024
4 Commits • 1 Features
Nov 1, 2024November 2024 monthly summary for starkware-libs/sequencer: Delivered Cairo native compilation integration to accelerate contract builds and enable a native execution path. Implemented a new Cairo native binary crate and wired native path through CommandLineCompiler via the cairo_native feature flag, with caching/manager components (GlobalContractCacheManager and ContractClassManager) to support asynchronous native compilation and multiple contract representations. Added a batcher compiler struct to optimize batch compilation throughput. These changes provide faster, scalable compilation, enable multiple contract representations, and lay a solid foundation for a production-ready native path.
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Quality Metrics
Correctness92.2%
Maintainability87.6%
Architecture89.4%
Performance83.6%
AI Usage25.0%
Skills & Technologies
Programming Languages
BUILDBashCairoDockerfileGit ConfigurationJSONJavaScriptMarkdownPythonRust
Technical Skills
API DevelopmentAPI designAPI developmentAPI integrationAlertingAutomationAxumBackend DevelopmentBash scriptingBuild AutomationBuild EngineeringBuild SystemBuild System ConfigurationBuild System ManagementBuild Systems
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