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JG Heithcock

PROFILE

Jg Heithcock

Jonathan Gheithcock contributed to Mattermost’s core and plugin repositories, building features such as admin workflow controls, secure mobile SSO, and granular playbook access management. He refactored the Playbooks plugin to support React 18, improved audit logging, and enhanced export/import reliability, focusing on maintainability and robust permission checks. In mattermost/mattermost and mattermost-plugin-playbooks, Jonathan used Go, TypeScript, and React to deliver backend and frontend improvements, including streamlined onboarding documentation and automated test coverage. His work addressed security, usability, and developer experience, demonstrating depth in API development, authentication, and state management while ensuring code quality through targeted refactoring and comprehensive testing.

Overall Statistics

Feature vs Bugs

87%Features

Repository Contributions

25Total
Bugs
3
Commits
25
Features
20
Lines of code
8,571
Activity Months10

Work History

April 2026

4 Commits • 3 Features

Apr 1, 2026

April 2026 performance summary focused on delivering user-focused features, stabilizing export/import workflows, and enhancing mobile UX and navigation. Key initiatives spanned mattermost-plugin-playbooks and mattermost-mobile, delivering measurable business value and demonstrating strong technical execution and testing discipline.

March 2026

4 Commits • 3 Features

Mar 1, 2026

March 2026: Across mattermost/mattermost-plugin-playbooks, mattermost/mattermost-mobile, and mattermost/mattermost-plugin-github, delivered security, UX, and process improvements with a focus on business value. Highlights include Playbook Access Control and Filtering, Animated GIF Display in Thumbnails and Gallery, and SLA Tracking for PR Reviews. Major bug fixes addressed filter behavior and cross-team run creation permissions, with tests and linting updates to ensure maintainability.

February 2026

2 Commits • 1 Features

Feb 1, 2026

February 2026: Delivered security and usability enhancements for mattermost-plugin-playbooks, with a focused security fix for playbook permissions (MM-66474) and a channel-based checklist creation feature (MM-67648). Also updated tests, addressed caching-related test flakiness, and aligned with existing MM-66249 fixes to improve overall reliability and developer experience.

January 2026

3 Commits • 2 Features

Jan 1, 2026

January 2026 performance highlights across mattermost/mattermost-plugin-playbooks and mattermost/mattermost. Delivered reliability and maintainability improvements in Playbooks property name input handling, resolved a permissions-related bug to enable standalone runs for team_user users without a playbook ID, and streamlined the System Console UX by removing the Cancel button on the User Attributes page. These changes reduce failure modes, simplify workflows, and strengthen access controls. Demonstrated strong React and TypeScript practices, permissions refactoring, CI/test hygiene, and cross-repo collaboration, delivering tangible business value in reliability, usability, and velocity.

December 2025

2 Commits • 1 Features

Dec 1, 2025

Concise monthly summary for 2025-12 focused on delivering access control and code quality improvements for the Playbooks plugin, with emphasis on business value, security, and maintainability.

November 2025

1 Commits • 1 Features

Nov 1, 2025

Monthly summary for 2025-11 focusing on delivering React 18 support for the Mattermost Playbooks plugin, with performance enhancements and improved stability. Highlights include migration to React 18 rendering API, dependency cleanup, and bug fixes that reduce build-time errors and improve UI reliability.

October 2025

4 Commits • 4 Features

Oct 1, 2025

In October 2025, delivered governance-enabled admin capabilities, security enhancements, and UX improvements across Mattermost core and the Playbooks plugin. Focused on business value through administrator self-service, safer remote clustering, and smoother task automation workflows, supported by expanded test coverage and dependency/tooling upgrades.

September 2025

3 Commits • 3 Features

Sep 1, 2025

September 2025 monthly summary focusing on delivering developer experience improvements, governance/observability enhancements, and secure authentication improvements across three Mattermost repos. Emphasis on business value through streamlined onboarding, better traceability, and robust mobile SSO integration, underpinned by targeted code quality improvements.

August 2025

1 Commits • 1 Features

Aug 1, 2025

Month: 2025-08 focused on delivering a major plugin refactor for mattermost/mattermost-plugin-playbooks, implementing an action-based registration flow for the Playbooks Post Menu and introducing actions to start playbook runs and attach posts to runs. This work simplifies registration, improves maintainability, and enables menu-driven run management while ensuring compatibility with the minimum server version. The effort includes a targeted code migration and associated changes to support automation and future feature extensions.

July 2025

1 Commits • 1 Features

Jul 1, 2025

Month 2025-07: Delivered a feature to improve reliability of admin workflows by enabling navigation blocking in the Backstage navbar, and updated the back navigation link to respect gated admin tasks. This work focuses on front-end navigation control and maintainability in the mattermost/mattermost repo.

Activity

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Quality Metrics

Correctness94.4%
Maintainability82.8%
Architecture84.4%
Performance82.0%
AI Usage24.8%

Skills & Technologies

Programming Languages

CSSGoJavaScriptMakefileMarkdownSCSSTypeScript

Technical Skills

API DevelopmentAPI IntegrationAPI developmentAPI integrationAudit LoggingAuthenticationBackend DevelopmentBuild System ManagementCode RefactoringCypressDeveloper SetupDocumentationE2E TestingFront End DevelopmentFrontend Development

Repositories Contributed To

5 repos

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

mattermost/mattermost-plugin-playbooks

Aug 2025 Apr 2026
9 Months active

Languages Used

CSSJavaScriptTypeScriptGo

Technical Skills

E2E TestingFrontend DevelopmentPlugin DevelopmentReactReduxAPI Integration

mattermost/mattermost

Jul 2025 Jan 2026
3 Months active

Languages Used

JavaScriptTypeScriptGoMakefileSCSS

Technical Skills

Front End DevelopmentReactAPI DevelopmentBackend DevelopmentBuild System ManagementCypress

mattermost/mattermost-mobile

Sep 2025 Apr 2026
3 Months active

Languages Used

JavaScriptTypeScript

Technical Skills

API IntegrationAuthenticationMobile DevelopmentReact NativeSAMLSSO

mattermost/mattermost-developer-documentation

Sep 2025 Sep 2025
1 Month active

Languages Used

Markdown

Technical Skills

Developer SetupDocumentation

mattermost/mattermost-plugin-github

Mar 2026 Mar 2026
1 Month active

Languages Used

GoJavaScript

Technical Skills

API integrationGitHub APIbackend developmentfrontend development