diff --git a/.gitignore b/.gitignore
index ddc861f..bfa944f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,14 @@ master.key
 
 # OMC orchestration tool state (not part of the project)
 .omc/
+
+# Publisher signing material. `cmd/pluginsign` reads a raw 32-byte Ed25519 seed from a
+# file path, so a stray `seed.bin` in the working tree is one `git add -A` away from
+# being published. Never commit key material; keep seeds outside the repo.
+*.key
+*.pem
+*.seed
+seed
+seed.*
+*_seed
+*.bin