diff --git a/.gitignore b/.gitignore
index 080217b..6462b01 100644
--- a/.gitignore
+++ b/.gitignore
@@ -60,3 +60,8 @@ node_modules.nosync/
 # accident — 8.9 MB of macOS binary — and `go build ./tools/shots` without -o puts
 # it right back.
 /shots
+
+# The working handover. It names the panel, the server id and the production
+# address — a map of one person's setup, which does not belong in a public repo.
+# Kept on disk because it is how a session hands over to the next one.
+HANDOFF.md