diff --git a/docs/channels/discord.md b/docs/channels/discord.md
index 28ecfdfa0..ca6ff6c9c 100644
--- a/docs/channels/discord.md
+++ b/docs/channels/discord.md
@@ -175,6 +175,7 @@ Notes:
 - `agents.list[].groupChat.mentionPatterns` (or `messages.groupChat.mentionPatterns`) also count as mentions for guild messages.
 - Multi-agent override: set per-agent patterns on `agents.list[].groupChat.mentionPatterns`.
 - If `channels` is present, any channel not listed is denied by default.
+- Use a `"*"` channel entry to apply defaults across all channels; explicit channel entries override the wildcard.
 - Threads inherit parent channel config (allowlist, `requireMention`, skills, prompts, etc.) unless you add the thread channel id explicitly.
 - Bot-authored messages are ignored by default; set `channels.discord.allowBots=true` to allow them (own messages remain filtered).
 - Warning: If you allow replies to other bots (`channels.discord.allowBots=true`), prevent bot-to-bot reply loops with `requireMention`, `channels.discord.guilds.*.channels.<id>.users` allowlists, and/or clear guardrails in `AGENTS.md` and `SOUL.md`.