API Evangelist enhancements for the zeroheight API

overlay: 1.0.0
info:
  title: API Evangelist enhancements for the zeroheight API
  version: 1.0.0
extends: ../openapi/zeroheight-open-api-v2.yml
x-provenance:
  generated: '2026-08-28'
  method: generated
  source: >-
    API Evangelist enrichment pipeline. Captures the runtime semantics harvested from zeroheight's
    public Postman collection, help centre and live probes as JSONPath actions over the derived
    contract, so the enhancements stay separable from the contract itself.
actions:
  - target: $.info
    description: Record the rate limit and the correlation-id convention on the contract root.
    update:
      x-rate-limit:
        limit: 30
        window_seconds: 30
        scope: api-key
        headers:
          - X-RateLimit-Limit
          - X-RateLimit-Remaining
          - X-RateLimit-Reset
        retry_after: false
        source: https://www.postman.com/zeroheight-0379/zeroheight/overview
      x-request-correlation:
        field: data.request_id
        location: response body
        note: Returned in the body rather than a header, so header-only logging captures nothing.
      x-plan-gating:
        rest_api: Enterprise plan only
        mcp: all plans, 500 calls/month on Free and Starter
        source: https://zeroheight.com/pricing/
  - target: $.info
    description: Point at the agent surface, which is materially larger than this REST contract.
    update:
      x-mcp:
        endpoint: https://mcp.zeroheight.com/mcp
        package: '@zeroheight/mcp-server'
        mode: both
        crosswalk: mcp/zeroheight-tool-crosswalk.yml
        note: Only 4 of 21 MCP tools have a REST backing operation.
  - target: $.paths['/pages/{page_id}/status'].patch
    description: Mark the single write operation with its consequence and reversal path.
    update:
      x-agentic-access:
        action_class: write
        consequence: reversible
        reversal: Re-issue this operation with the previous status value.
        reversal_operationId: updatePageStatus
        window: not applicable — state assignment with no expiry
        precondition: Call getPageStatus first and retain the current value; it is the only undo.
        escalation: none required
  - target: $.paths['/pages/{page_id}'].get
    description: Flag the markdown format as the agent-preferred representation.
    update:
      x-agent-preferred-format: markdown
      x-agentic-access:
        action_class: read
        consequence: none
  - target: $.paths['/styleguides'].get
    description: Mark the discovery entry point.
    update:
      x-entry-point: true
      x-agentic-access:
        action_class: read
        consequence: none
  - target: $.paths['/token_sets'].get
    description: Record that the standardised token payload is delivered outside this contract.
    update:
      x-domain-standards:
        - W3C Design Tokens Community Group format (DTCG)
        - Style Dictionary v5
      x-note: >-
        This route lists token SETS. The standard-conformant token payload is served from a per-set
        Style Dictionary export URL issued in the zeroheight UI, which is not part of open_api/v2.
  - target: $.components.schemas.ErrorEnvelope
    description: Record that this envelope is observed, not documented, and is not RFC 9457.
    update:
      x-observed: true
      x-observed-on: '2026-08-28'
      x-rfc9457: false
      x-catalog: errors/zeroheight-problem-types.yml