diff --git a/skills/freebsd-os-upgrade/SKILL.md b/skills/freebsd-os-upgrade/SKILL.md
index 0a7ba25..0255ad6 100644
--- a/skills/freebsd-os-upgrade/SKILL.md
+++ b/skills/freebsd-os-upgrade/SKILL.md
@@ -67,6 +67,15 @@ pkg update -f && pkg upgrade      # ports packages (separate from base here)
 
 ## Runbook
 
+**Which path applies to you:**
+
+- **Fleet (USB/disk nodes)**: `freebsd-update` path — one command, no flags.
+  `freebsd-update -r 15.1-RELEASE upgrade` handles all cross-release logic.
+- **OSA (mother, build host)**: `pkgbase` path — carries the repo-editing +
+  `IGNORE_OSVERSION` steps below. If OSA were ever unified to freebsd-update,
+  the entire pkgbase branch disappears. Until then, it's a once-a-year tax on
+  one host.
+
 1. **Capture pre-status** for after-the-fact comparison — see
    *Pre-reboot status capture* in the reference (hostname, `freebsd-version -k`
    / `-u`, `uname -r`, services, `jls`, `pfctl -s info`). Record