Digger (now OpenTaco) is an infrastructure-as-code orchestration platform that automates Terraform, OpenTofu, Terragrunt, and Pulumi workflows within existing CI/CD pipelines. The system provides PR-level automation (plan/apply comments), drift detection, policy-as-code via OPA, and an optional Terraform Enterprise-compatible state management and remote execution layer. It integrates with GitHub, GitLab, Bitbucket, Azure DevOps, and Buildkite through webhooks and CI backends. The architecture is a multi-service monorepo: a Go backend (Gin/GORM) handles webhooks, job scheduling, and a web UI; a separate CLI tool (cobra) runs directly in CI; a drift detection service with cron scheduling; a sandbox sidecar (TypeScript/Node) for remote execution; and the Taco service (Echo) that reimplements TFE APIs for state management, RBAC, and run execution. The UI is a React/TanStack Router app with WorkOS authentication. The codebase is actively maintained with frequent releases, extensive SQL migrations, Helm charts for Kubernetes deployment, and dual open-core and enterprise (ee/) feature sets.