API Evangelist enhancements for Supernormal API

overlay: 1.0.0
info:
  title: API Evangelist enhancements for Supernormal API
  version: 1.0.0
extends: openapi/supernormal-openapi-original.json
actions:
- target: $.info
  update:
    x-apievangelist-enriched: '2026-07-21'
    x-apievangelist-provider: supernormal
    x-apievangelist-notes: >-
      Enrichment overlay — non-destructive annotations layered over the provider's published
      spec. Documents auth surfaces, MCP availability, and observed gaps without mutating the
      original.
- target: $.info
  update:
    x-auth-surfaces:
      api_key:
        header: X-API-TOKEN
        scoped: true
      oauth2:
        authorization_server: https://api.supernormal.com/.well-known/oauth-authorization-server
        pkce: S256
        dynamic_client_registration: true
    x-mcp-server:
      url: https://api.supernormal.com/mcp
      auth: oauth2-bearer
      protected_resource_metadata: https://api.supernormal.com/.well-known/oauth-protected-resource/mcp
- target: $.paths['/posts'].get
  update:
    x-pagination:
      style: limit-offset
      limit_default: 20
      limit_max: 100
- target: $.info
  update:
    x-gaps:
    - No operationIds defined on operations (operationId absent throughout).
    - Error responses enumerated only on GET /user; other operations document success only.
    - Error schema is custom {error, message}, not RFC 9457 problem+json.
    - No documented rate-limit headers or idempotency contract.