diff --git a/skills/codex/enter-fifth-domain/SKILL.md b/skills/codex/enter-fifth-domain/SKILL.md
index 84d8c82..c9c39c5 100644
--- a/skills/codex/enter-fifth-domain/SKILL.md
+++ b/skills/codex/enter-fifth-domain/SKILL.md
@@ -5,6 +5,14 @@ description: Resolve Ice Shuo's Chinese language-route commands into the current
 
 # Enter Fifth Domain
 
+## TCS dynamic pre-gate
+
+Before resolving a Fifth Domain route, read `/Volumes/JZAO/铸渊-ICE-GL-ZY001/AGENTS.md` and the
+canonical TCS gate it names. Parse the current intent, subject, channel, target, and authority only from
+Ice Shuo's latest direct natural-language instruction. Use registries and this skill to validate the parsed
+route; never fall back to a hard-coded heartbeat, zero-core, public-body, repository, or host default.
+New recovery events and receipts start as `.tcs`; legacy JSON/HLDP inputs are derived host projections.
+
 Translate the user's language command into a current online repository route. Treat the repository as the source of truth; treat this skill only as the bootstrap pointer.
 
 ## Resolve the entrance