Polygon Index Analysis

arazzo: 1.0.1
info:
  title: Polygon Index Analysis
  summary: Snapshot an index, pull its aggregate bars, and read its previous close.
  description: >-
    An index-tracking flow for a single index (e.g. I:SPX). The workflow
    reads the current index snapshot to capture the latest value and session
    change, pulls aggregate bars over a date range for trend context, and
    reads the previous-close to anchor the data against the prior session.
    Every step spells out its request inline so the flow can be read and
    executed without opening the underlying OpenAPI description.
  version: 1.0.0
sourceDescriptions:
- name: indicesApi
  url: ../openapi/polygon-indices-openapi.yml
  type: openapi
workflows:
- workflowId: index-analysis
  summary: Analyze an index via snapshot, aggregate bars, and previous close.
  description: >-
    Reads an index snapshot, then chains its aggregate bars and
    previous-close endpoints for the same index ticker.
  inputs:
    type: object
    required:
    - ticker
    - multiplier
    - timespan
    - from
    - to
    properties:
      ticker:
        type: string
        description: Index ticker symbol (e.g. I:SPX).
      multiplier:
        type: integer
        description: Size of the timespan multiplier for the aggregate window.
      timespan:
        type: string
        description: Aggregate window size (minute, hour, day, week, month, quarter, year).
      from:
        type: string
        description: Start of the aggregate window (YYYY-MM-DD).
      to:
        type: string
        description: End of the aggregate window (YYYY-MM-DD).
  steps:
  - stepId: getSnapshot
    description: >-
      Read the current snapshot for the index to capture its latest value
      and session change.
    operationId: getIndicesSnapshot
    parameters:
    - name: ticker.any_of
      in: query
      value: $inputs.ticker
    - name: limit
      in: query
      value: 1
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      value: $response.body#/results/0/value
      sessionChange: $response.body#/results/0/session/change
      marketStatus: $response.body#/results/0/market_status
  - stepId: getAggregates
    description: >-
      Retrieve aggregate bars for the index over the requested date range
      for trend context.
    operationId: getIndicesAggregateBars
    parameters:
    - name: indicesTicker
      in: path
      value: $inputs.ticker
    - name: multiplier
      in: path
      value: $inputs.multiplier
    - name: timespan
      in: path
      value: $inputs.timespan
    - name: from
      in: path
      value: $inputs.from
    - name: to
      in: path
      value: $inputs.to
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      bars: $response.body#/results
      resultsCount: $response.body#/resultsCount
  - stepId: getPreviousClose
    description: >-
      Read the previous day's open, close, high, and low for the index to
      anchor the data against the prior session.
    operationId: getIndicesPreviousClose
    parameters:
    - name: indicesTicker
      in: path
      value: $inputs.ticker
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      previousClose: $response.body#/results/0/c
  outputs:
    value: $steps.getSnapshot.outputs.value
    bars: $steps.getAggregates.outputs.bars
    previousClose: $steps.getPreviousClose.outputs.previousClose