---
title: Textual Tripwires
read_when:
  - "working on textual code"
---

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# Textual Tripwires

Action-triggered rules for this category. Consult BEFORE taking any matching action.

**CRITICAL: Before adding cell values to Textual DataTable** → Read [DataTable Rich Markup Escaping](datatable-markup-escaping.md) first. Always wrap in `Text(value)` if strings contain user data with brackets. Otherwise `[anything]` will be interpreted as Rich markup.
