diff --git a/README.md b/README.md
index dd26353..4ac5f89 100644
--- a/README.md
+++ b/README.md
@@ -50,7 +50,8 @@ These are hard constraints that shape every decision:
 - C++ is the only first-class plugin path on this install (no Python/Pâté binding present)
 - [plan9port](https://9fans.github.io/plan9port/) — the `plumb` plugin is a
   plumb client and talks to plan9port's plumber at runtime (see
-  [docs/PLUMBING.md](docs/PLUMBING.md)). Only needed if you enable `plumb`.
+  [docs/PLUMBING.md](docs/PLUMBING.md)). Only needed if you enable `plumb`
+  (highly recommended!).
 
 ## Build