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Jack Heart

PROFILE

Jack Heart

Over seven months, contributed to Metta-AI/metta and Metta-AI/mettagrid by building end-to-end policy evaluation dashboards, deterministic simulation tooling, and automated release pipelines. Leveraged Python, C++, and SQL to design modular configuration systems, implement live experiment tracking, and refactor analytics backends for reproducibility and maintainability. Enhanced developer workflows through CLI modernization, codebase reorganization, and CI/CD integration, while introducing features like versioned heatmaps, replay data integration, and two-tier recipe validation. Addressed test stability and deployment reliability by standardizing configuration structures and restoring daily release automation. The work emphasized scalable backend development, robust testing, and streamlined cloud-based analytics for AI-driven environments.

Overall Statistics

Feature vs Bugs

80%Features

Repository Contributions

47Total
Bugs
6
Commits
47
Features
24
Lines of code
37,884
Activity Months7

Your Network

49 people

Work History

November 2025

2 Commits • 1 Features

Nov 1, 2025

November 2025 performance summary for Metta-AI/mettagrid. Delivered a two-tier recipe validation testing system and restored daily stable release functionality, yielding more reliable CI, faster feedback, and a smoother release workflow. Reorganized recipe structure to improve testability and accessibility; reduced SPS requirements and ensured robust timeout handling for scheduled jobs. This work increases deployment confidence and accelerates iteration on recipe changes across the grid.

October 2025

10 Commits • 5 Features

Oct 1, 2025

Month: 2025-10 — Performance summary for Metta-AI/metta and Metta-AI/mettagrid. The team delivered a set of business-value features, reinforced by an automated release pipeline and targeted bug fixes, enhancing release reliability, build stability, and developer productivity across packages/. Key business outcomes include: streamlined multi-package publishing, safer deployment workflows, and improved developer ergonomics for creating and invoking recipes. The changes also tightened metrics tracking and restored training performance by reverting a suboptimal optimizer default.

September 2025

2 Commits • 1 Features

Sep 1, 2025

September 2025 monthly summary for Metta-AI/mettagrid: Implemented deterministic action configuration changes for GameConfig and benchmark tests by replacing maps with an ordered vector of (name, config) pairs, ensuring the noop action is placed at index 0 when enabled, and aligning benchmark config generation to use the same vector-based actions structure. Added tests to verify action ordering and data-structure parity to improve test stability and determinism.

August 2025

7 Commits • 5 Features

Aug 1, 2025

August 2025 monthly summary for Metta (2025-08). Delivered focused business-value improvements by consolidating documentation, reorganizing experimentation tooling, decoupling training config from the core mettagrid, standardizing environment naming, and strengthening CI readiness. Close alignment between code changes and developer experience reduced onboarding time, enabled faster experimentation cycles, and improved testability. Key outcomes include improved discoverability of docs within code, modularized tooling structure for experiments and researchers, decoupled training environment setup for better modularity, consistent configuration naming across Python and C++ headers, and a streamlined CI workflow with targeted testing of the gitta/codebot/codeclip components.

July 2025

9 Commits • 5 Features

Jul 1, 2025

July 2025 monthly summary for Metta-AI/metta focusing on delivered capabilities, reliability, and developer experience. Key features and structural changes were shipped across curriculum prioritization, CLI modernization, AI-agent architecture, notebook management, and repository tooling. A targeted bug fix improved CI stability by making curriculum tests deterministic. This work collectively enhances product value, speeds experimentation, and strengthens the foundation for scalable AI-enabled workflows.

May 2025

6 Commits • 2 Features

May 1, 2025

May 2025 monthly performance summary for Metta-AI/metta: Delivered end-to-end replay data generation and dashboard integration, improved Play tool robustness for simulation suites, and overhauled the analytics backend with a SQL-backed StatsDb (DuckDB) and enhanced CLI. These efforts enabled faster, data-driven policy evaluation and more reliable simulation workflows, with a unified analytics surface across environments.

April 2025

11 Commits • 5 Features

Apr 1, 2025

April 2025: Delivered end-to-end policy evaluation enhancements for Metta, with a focus on visibility, reproducibility, and maintainability. Implemented a live policy evaluation heatmap dashboard with batch evaluation, versioned heatmaps for post-hoc analysis, and a map viewer to provide richer environmental context. Improved experiment tracking by tagging WandB runs for training jobs. Refactored project configuration for modularity and reliability, including a typed dataclass configuration system and Hydra-to-dataclass migration. Fixed a critical EvalStatsLogger invocation bug in sweep_eval to ensure accurate metrics collection. These changes collectively reduce time-to-insight, improve traceability, and streamline future development.

Activity

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Quality Metrics

Correctness90.2%
Maintainability89.4%
Architecture90.0%
Performance79.6%
AI Usage27.6%

Skills & Technologies

Programming Languages

BashC++CSSHTMLJavaScriptMarkdownPythonSQLShellTOML

Technical Skills

AI Agent FrameworksAI Framework DesignAWS S3AutomationBackend DevelopmentBackward CompatibilityBuild SystemsC++CI/CDCLI DevelopmentCloud ComputingCloud Services (AWS S3)Cloud Storage (S3)Code OrganizationCode Refactoring

Repositories Contributed To

2 repos

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

Metta-AI/metta

Apr 2025 Oct 2025
5 Months active

Languages Used

CSSHTMLJavaScriptPythonYAMLSQLShellBash

Technical Skills

AWS S3Backend DevelopmentBackward CompatibilityCloud ComputingCloud Services (AWS S3)Code Organization

Metta-AI/mettagrid

Sep 2025 Nov 2025
3 Months active

Languages Used

C++Python

Technical Skills

C++Configuration ManagementDebuggingGame DevelopmentPythonTesting