Arya Koste enhanced the contributor onboarding process for the Aryakoste/mattermost repository by updating documentation and contribution guidelines. Focusing on YAML-based templates, Arya revised the bug report template and CONTRIBUTING.md to reference the Mattermost Handbook, ensuring contributors have direct access to comprehensive guidelines. This work standardized the contribution flow, reduced friction for new contributors, and improved resource accessibility. By linking documentation changes to specific issues and commits, Arya provided clear traceability and governance alignment. The updates did not involve bug fixes or feature development but delivered measurable improvements in onboarding quality and contributor experience through targeted documentation and process refinement.