Mercari built Single Front Door (SFD), a unified platform interface that consolidates multiple developer tools and workflows into a single entry point. The system uses Argo Workflows to execute GitOps operations through CLI or AI-powered IDE integrations via Model Context Protocol. Key technical challenges included implementing OAuth-based credential management to maintain proper access control at scale, and configuring IAM with Kubernetes RBAC for secure access to external services like GCP and GitHub. The platform aims to become a modular workflow engine with reusable building blocks for infrastructure provisioning, service configuration, and CI/CD operations.
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