How can I send an Allure report link to Slack?

You need to use two steps. One with codefresh cli and cf_export to create an environment variable with the result. And one with slack that uses the result

Here is the idea (just pseudocode)

version: '1.0'
steps:
  allure_link_fetch:
    title: Getting Test URL
    image: codefresh/cli
    commands:
      - 'TEST_URL =$(codefresh get annotation ...)
      - cf_export TEST_URL
  slack_notify:
    title: Slack notify
    stage: “slack notify”
    type: slack-notifier
    arguments:
      SLACK_HOOK_URL: “${{SLACK_HOOK_URL}}”
      SLACK_TEXT: “Test completed at $TEST_URL”

Does that help?