TL;DR

Use Block Kit to render tables in Slack instead of relying on mrkdwn to support GitHub-Flavored Markdown pipe tables.

Guidance

• Identify the specific Markdown pipe tables that need to be rendered as native Slack tables.
• Use Slack's Block Kit API to construct a table block that can be sent alongside the existing text.
• Update Hermes to detect Markdown pipe tables in its responses and convert them to Block Kit tables before sending to Slack.
• Test the updated Hermes behavior with various table examples to ensure correct rendering.

Example

{
  "type": "section",
  "text": {
    "type": "mrkdwn",
    "text": "Tool comparison:"
  },
  "fields": [
    {
      "type": "mrkdwn",
      "text": "*Tool*\nVitest\nPlaywright"
    },
    {
      "type": "mrkdwn",
      "text": "*Best for*\nUnit tests\nE2E browser flows"
    },
    {
      "type": "mrkdwn",
      "text": "*Runs in*\nNode/jsdom\nReal browsers"
    }
  ]
}

Notes

This approach requires updating Hermes to use Block Kit for table rendering, which may involve significant changes to its Slack integration.

Recommendation

Apply workaround: Use Block Kit to render tables, as it provides a more flexible and compatible way to display structured data in Slack.