Loved that idea so much that I went and implemented it: - The checks now have an automatic type inferrence and shorthand - introduced default rules that are used when nothing’s configured - realized that yaml-anchors always worked thanks to the lib I’m using.

So now with this preamble:

# Defaults are used when nothing is defined at the slot level. They can be overridden by defining rules directly on a slot.
defaults:
  rules:
    - match:
        code: 0
      status: { id: ok, label: "✅" }
    - match: {}
      status: { id: error, label: "❌" }

# YAML anchors: reusable fragments ilias doesn't interpret directly... 
# it's all just yaml
_anchors:
  pct_rules: &pct_rules           # works for disk, memory, CPU …
    - match:
        output: "^[0-6]\\d%$|^[0-9]%$"
      status: { id: ok, label: "✅ <70%" }
    - match:
        output: "^[7-8]\\d%$"
      status: { id: warn, label: "⚠️ 70–89%" }
    - match: {}
      status: { id: critical, label: "🔴 ≥90%" }

I can now have a tile like this:

      - name: Memory
        slots: # combine anchors and default rules as well as check shorthands
          - name: usage
            check: "free | awk '/^Mem:/ {printf \"%.0f%\", $3/$2 * 100}'"
            rules: *pct_rules
          - name: available
            check: "free -h | awk '/^Mem:/ {print $7 \" free\"}'"
            # uses default rules
          - name: total
            check: "free -h | awk '/^Mem:/ {print $2 \" total\"}'"
            # uses default rules

And the best? It’s fully backwards compatible ❤️

Thanks again for the suggestion!