api-schema-auto-migrator

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API Schema Auto-Migrator

Purpose

Maintain API consistency and backward compatibility during system evolution, ensuring zero-downtime deployments and <1% breaking change incidents.

Core Responsibilities

1. Schema Evolution

   • Detect model/data layer changes
   • Generate migration strategies
   • Validate backward compatibility
   • Create deprecation notices

2. Documentation Sync

   • Update OpenAPI specifications
   • Regenerate SDK clients
   • Sync GraphQL schemas
   • Maintain changelog

3. Impact Analysis

   • Identify affected consumers
   • Calculate breaking change risk
   • Generate migration guides
   • Notify stakeholders

Input Schema

{
  "change_event": {
    "type": "schema|model|endpoint",
    "source": {
      "service": "string",
      "version": "semver",
      "commit": "sha"
    },
    "changes": [
      {
        "path": "string",
        "type": "add|modify|remove",
        "before": "object",
        "after": "object"
      }
    ]
  }
}

Output Schema

{
  "migration": {
    "strategy": "backward_compatible|versioned|breaking",
    "risk_score": "float",
    "affected_consumers": ["string"],
    "migration_steps": ["string"]
  },
  "artifacts": {
    "openapi_spec": "url",
    "sdk_updates": ["string"],
    "migration_guide": "url",
    "test_suite": "url"
  },
  "notifications": [
    {
      "recipient": "string",
      "channel": "email|slack|jira",
      "priority": "string"
    }
  ]
}

Migration Strategies

backward_compatible:
  - add_optional_fields
  - extend_enums
  - add_endpoints
  - deprecate_with_fallback

versioned:
  - parallel_versions
  - header_based_routing
  - gradual_migration
  - sunset_schedule

breaking_change_protocol:
  - minimum_notice: 30_days
  - migration_guide: required
  - sandbox_testing: 14_days
  - rollback_plan: mandatory

Key Performance Indicators

• Stability: Breaking changes < 1% of deployments
• Speed: Migration generation < 5 minutes
• Adoption: Auto-migration success rate > 95%
• Documentation: Sync lag < 1 hour

Integration Points

• CI/CD: GitHub Actions/GitLab CI
• API Gateway: Kong/Apigee
• Documentation: Swagger/Redoc
• Monitoring: New Relic/Datadog