{
  "id": "stack-profile:approval-workflow-engine",
  "_kind": "StackProfile",
  "_file": "domain/stack-profiles/deep-stacks-7.yaml",
  "_cluster": "domain",
  "attributes": {
    "displayName": "Approval Workflow Engine (Go, PostgreSQL, Redis, React, gRPC, Docker)",
    "description": "A workflow engine purpose-built for multi-step approval processes such\nas expense approvals, access requests, and change advisory boards. Go\nimplements the core state machine, with PostgreSQL storing workflow\ndefinitions, instance state, and audit trails as immutable event logs.\nRedis provides distributed locking for concurrent workflow transitions\nand caches active workflow graphs. gRPC enables efficient service-to-\nservice integration, while a React frontend renders dynamic approval\nforms and status dashboards. Prometheus tracks workflow throughput\nand SLA compliance. Docker containers deploy the complete system.\nThe tradeoff is the complexity of modeling arbitrary approval\ntopologies (parallel, sequential, conditional) while maintaining\naudit integrity.\n",
    "composes": [
      "language:go",
      "library:chi",
      "library:pgx",
      "library:grpc-js",
      "language:protobuf",
      "framework:react",
      "tool:docker",
      "tool:prometheus"
    ]
  },
  "outgoingEdges": [
    {
      "from": "stack-profile:approval-workflow-engine",
      "to": "language:go",
      "kind": "composed_of"
    },
    {
      "from": "stack-profile:approval-workflow-engine",
      "to": "library:chi",
      "kind": "composed_of"
    },
    {
      "from": "stack-profile:approval-workflow-engine",
      "to": "library:pgx",
      "kind": "composed_of"
    },
    {
      "from": "stack-profile:approval-workflow-engine",
      "to": "library:grpc-js",
      "kind": "composed_of"
    },
    {
      "from": "stack-profile:approval-workflow-engine",
      "to": "language:protobuf",
      "kind": "composed_of"
    },
    {
      "from": "stack-profile:approval-workflow-engine",
      "to": "framework:react",
      "kind": "composed_of"
    },
    {
      "from": "stack-profile:approval-workflow-engine",
      "to": "tool:docker",
      "kind": "composed_of"
    },
    {
      "from": "stack-profile:approval-workflow-engine",
      "to": "tool:prometheus",
      "kind": "composed_of"
    },
    {
      "from": "stack-profile:approval-workflow-engine",
      "to": "role:backend-engineer",
      "kind": "used_by_role"
    },
    {
      "from": "stack-profile:approval-workflow-engine",
      "to": "role:fullstack-engineer",
      "kind": "used_by_role"
    },
    {
      "from": "stack-profile:approval-workflow-engine",
      "to": "workflow:process-automation-assessment",
      "kind": "follows_workflow"
    },
    {
      "from": "stack-profile:approval-workflow-engine",
      "to": "workflow:feature-development",
      "kind": "follows_workflow"
    },
    {
      "from": "stack-profile:approval-workflow-engine",
      "to": "domain:operations",
      "kind": "applies_to"
    },
    {
      "from": "stack-profile:approval-workflow-engine",
      "to": "domain:software-engineering",
      "kind": "applies_to"
    },
    {
      "from": "stack-profile:approval-workflow-engine",
      "to": "skill-area:event-driven-architecture",
      "kind": "requires_skill_area"
    },
    {
      "from": "stack-profile:approval-workflow-engine",
      "to": "skill-area:backend-api-design",
      "kind": "requires_skill_area"
    },
    {
      "from": "stack-profile:approval-workflow-engine",
      "to": "skill-area:backend-data-persistence",
      "kind": "requires_skill_area"
    },
    {
      "from": "stack-profile:approval-workflow-engine",
      "to": "skill-area:concurrency-multithreading",
      "kind": "requires_skill_area"
    },
    {
      "from": "stack-profile:approval-workflow-engine",
      "to": "skill-area:observability-instrumentation",
      "kind": "requires_skill_area"
    }
  ],
  "incomingEdges": []
}