X Audit Engagement on a User's Latest Post

arazzo: 1.0.1
info:
  title: X Audit Engagement on a User's Latest Post
  summary: Resolve a handle, get their latest post, then list who liked it.
  description: >-
    Produces a small engagement audit for an X account. The workflow resolves a
    username to an id, retrieves that user's single most recent post, and then
    lists the users who liked that post. Each step inlines its field selections
    so the chain reads and executes without opening the underlying OpenAPI
    description.
  version: 1.0.0
sourceDescriptions:
- name: xApi
  url: ../openapi/x-api-openapi.json
  type: openapi
workflows:
- workflowId: post-engagement-audit
  summary: Resolve a user, fetch their latest post, and list its liking users.
  description: >-
    Chains the username lookup endpoint into the user-posts endpoint and then
    the liking-users endpoint, branching to a no-op end when the user has no
    posts.
  inputs:
    type: object
    required:
    - username
    properties:
      username:
        type: string
        description: The @username to audit, without the leading @.
      authorization:
        type: string
        description: Bearer token to authorize the requests (e.g. "Bearer xxx").
  steps:
  - stepId: resolveUser
    description: Resolve the username into a numeric user id.
    operationId: getUsersByUsername
    parameters:
    - name: username
      in: path
      value: $inputs.username
    - name: user.fields
      in: query
      value: id,name,username
    - name: Authorization
      in: header
      value: $inputs.authorization
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      userId: $response.body#/data/id
  - stepId: latestPost
    description: Retrieve the single most recent original post for the resolved user.
    operationId: getUsersPosts
    parameters:
    - name: id
      in: path
      value: $steps.resolveUser.outputs.userId
    - name: max_results
      in: query
      value: 5
    - name: exclude
      in: query
      value: replies,retweets
    - name: tweet.fields
      in: query
      value: id,text,public_metrics
    - name: Authorization
      in: header
      value: $inputs.authorization
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      latestPostId: $response.body#/data/0/id
    onSuccess:
    - name: hasPosts
      type: goto
      stepId: likingUsers
      criteria:
      - context: $response.body
        condition: $.data.length > 0
        type: jsonpath
    - name: noPosts
      type: end
      criteria:
      - context: $response.body
        condition: $.data.length == 0
        type: jsonpath
  - stepId: likingUsers
    description: List the users who liked the resolved user's latest post.
    operationId: getPostsLikingUsers
    parameters:
    - name: id
      in: path
      value: $steps.latestPost.outputs.latestPostId
    - name: max_results
      in: query
      value: 100
    - name: user.fields
      in: query
      value: id,name,username
    - name: Authorization
      in: header
      value: $inputs.authorization
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      likingUsers: $response.body#/data
      resultCount: $response.body#/meta/result_count
  outputs:
    userId: $steps.resolveUser.outputs.userId
    latestPostId: $steps.latestPost.outputs.latestPostId
    likingUsers: $steps.likingUsers.outputs.likingUsers