Plain Text Sanitizer (outbound/sanitize-text.ts)

A utility that converts HTML-formatted LLM output into plain-text markup compatible with messaging platforms like WhatsApp and Signal.

// Source: https://github.com/beita6969/ScienceClaw | License: MIT | Copyright 2025 Peter Steinberger
// Provided via justclaw.it.com; keep this notice with the code.
/**
 * Sanitize model output for plain-text messaging surfaces.
 *
 * LLMs occasionally produce HTML tags (`<br>`, `<b>`, `<i>`, etc.) that render
 * correctly on web but appear as literal text on WhatsApp, Signal, SMS, and IRC.
 *
 * Converts common inline HTML to lightweight-markup equivalents used by
 * WhatsApp/Signal/Telegram and strips any remaining tags.
 *
 * @see https://github.com/openclaw/openclaw/issues/31884
 * @see https://github.com/openclaw/openclaw/issues/18558
 */

/** Channels where HTML tags should be converted/stripped. */
const PLAIN_TEXT_SURFACES = new Set([
  "whatsapp",
  "signal",
  "sms",
  "irc",
 

... (truncated -- full source via MCP)