API Evangelist enhancements — Cheniere LNG Connection informational-postings API

# method: generated
# source: API Evangelist annotations layered on openapi/cheniere-energy-lng-connection.yml
# generated: '2026-09-06'
overlay: 1.0.0
info:
  title: API Evangelist enhancements — Cheniere LNG Connection informational-postings API
  version: 1.0.0
  description: >-
    Captures the annotations API Evangelist added on top of the bare endpoint surface read out of
    Cheniere's own client bundle. Cheniere publishes no OpenAPI, so the base document
    (openapi/cheniere-energy-lng-connection.yml) is itself derived; this overlay records which
    parts of it are ADDED INTERPRETATION rather than observed fact, so the two can be told apart.
    Everything targeted below is commentary — regulatory context, field-casing warnings, the
    two broken operations, and the enumeration of TSP identifiers. None of it changes a path, a
    parameter name or a response shape.
extends: ../openapi/cheniere-energy-lng-connection.yml
actions:
  - target: $.info
    description: >-
      Provenance banner. Records that no provider-published spec exists, names the client bundle
      the paths were read from, and states that response schemas came from live anonymous probes
      on 2026-09-06.
    update:
      x-api-evangelist-note: >-
        Derived description. Paths and parameter names are verbatim string literals from
        https://lngconnection.cheniere.com/app.c8746b4fbffdfedeb14b.js; response schemas were read
        from live anonymous responses captured 2026-09-06. Not published or endorsed by Cheniere.
  - target: $.tags
    description: >-
      Tag grouping is ours. Cheniere's controllers are Capacity, GasQuality, DailyComingled,
      Mainline, Transactional, IndexOfCustomers, PostedImbalances, Notice, Document,
      DocumentManager, Station, LocationDownload, InformationContact, Weather, Legend, Footer,
      Page and Logger. We collapsed those eighteen controllers into ten tags that follow the FERC
      posting classes a reader actually asks for, rather than the server's class layout.
  - target: $.paths..parameters[?(@.name == 'tspNo')]
    description: >-
      Added the TSP enumeration. The API declares no enum and returns no error for an unknown
      tspNo — it returns 200 with zero rows — so the working values (200 Creole Trail, 400 Corpus
      Christi) and the empty ones (600, 800) were established by probing, and are recorded on the
      parameter so a consumer does not have to rediscover them.
  - target: $.paths['/api/Transactional/GetCapacityRelease'].get
    description: >-
      Flagged as broken as shipped. The provider's own client calls this with tspNo alone (404);
      the dated form returns 500. Capacity release is a FERC-required posting class, so this is
      recorded as a live gap, not a retirement.
    update:
      x-api-evangelist-defect: >-
        Non-functional on 2026-09-06. 404 on the single-parameter form the provider's own client
        uses, 500 on the dated form.
  - target: $.paths['/api/Weather/GetWeatherLocations'].get
    description: Flagged as returning 500 deterministically for tspNo 200.
    update:
      x-api-evangelist-defect: Returns HTTP 500 with the generic error envelope. Observed 2026-09-06.
  - target: $.paths['/api/Notice/FilterNotices'].get
    description: >-
      Recorded that the model binder rejects partial parameter sets with 400 "The request is
      invalid.", which the error body does not explain.
  - target: $.components.schemas
    description: >-
      Every schema description is ours. The API returns untyped JSON with no documentation, so the
      regulatory meaning of each posting class (FERC 18 CFR 284.13(b)/(c)/(d)) and the NAESB WGQ
      element semantics were attached by API Evangelist from the code values present in the
      payloads.
  - target: $.components.schemas.InformationalContact
    description: >-
      Field names only. Live contact values are deliberately not carried into the specification or
      anywhere else in this repository.
  - target: $.components.schemas.Error
    description: >-
      Added the explicit note that this is the ASP.NET Web API envelope and NOT RFC 9457, so a
      consumer does not plan for problem+json members that will never arrive.