Slack Create Channel, Invite Members, and Announce

arazzo: 1.0.1
info:
  title: Slack Create Channel, Invite Members, and Announce
  summary: Create a new channel, invite a set of users, and post a kickoff message.
  description: >-
    A common Slack onboarding pattern that stands up a brand new channel and
    prepares it for collaboration. The workflow creates the public or private
    channel, invites the supplied comma separated list of user IDs into it, and
    then posts an opening announcement message so members arrive to immediate
    context. 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: chatApi
  url: ../openapi/slack-chat-api-openapi.yml
  type: openapi
- name: conversationsApi
  url: ../openapi/slack-conversations-api-openapi.yml
  type: openapi
workflows:
- workflowId: create-channel-invite-announce
  summary: Create a channel, invite users, and post a kickoff announcement.
  description: >-
    Creates a channel by name, invites the supplied users into it, and posts an
    announcement message into the freshly created channel.
  inputs:
    type: object
    required:
    - name
    - users
    - announcement
    properties:
      name:
        type: string
        description: Name of the public or private channel to create.
      isPrivate:
        type: boolean
        description: Create a private channel instead of a public one.
      users:
        type: string
        description: A comma separated list of user IDs to invite (up to 1000).
      announcement:
        type: string
        description: The kickoff message text to post once the channel exists.
  steps:
  - stepId: createChannel
    description: >-
      Create the public or private channel that members will be invited into.
    operationId: postConversationsCreate
    requestBody:
      contentType: application/x-www-form-urlencoded
      payload:
        name: $inputs.name
        is_private: $inputs.isPrivate
    successCriteria:
    - condition: $statusCode == 200
    - context: $response.body
      condition: $.ok == true
      type: jsonpath
    outputs:
      channelId: $response.body#/channel/id
      channelName: $response.body#/channel/name
  - stepId: inviteUsers
    description: >-
      Invite the supplied comma separated list of users into the new channel.
    operationId: postConversationsInvite
    requestBody:
      contentType: application/x-www-form-urlencoded
      payload:
        channel: $steps.createChannel.outputs.channelId
        users: $inputs.users
    successCriteria:
    - condition: $statusCode == 200
    - context: $response.body
      condition: $.ok == true
      type: jsonpath
    outputs:
      invitedChannelId: $response.body#/channel/id
  - stepId: postAnnouncement
    description: >-
      Post the kickoff announcement message into the new channel so invited
      members arrive to immediate context.
    operationId: postChatPostmessage
    requestBody:
      contentType: application/x-www-form-urlencoded
      payload:
        channel: $steps.createChannel.outputs.channelId
        text: $inputs.announcement
    successCriteria:
    - condition: $statusCode == 200
    - context: $response.body
      condition: $.ok == true
      type: jsonpath
    outputs:
      messageTs: $response.body#/ts
  outputs:
    channelId: $steps.createChannel.outputs.channelId
    channelName: $steps.createChannel.outputs.channelName
    messageTs: $steps.postAnnouncement.outputs.messageTs