diff --git a/.changeset/poor-sheep-itch.md b/.changeset/poor-sheep-itch.md
new file mode 100644
index 000000000..12a37b4a7
--- /dev/null
+++ b/.changeset/poor-sheep-itch.md
@@ -0,0 +1,6 @@
+---
+"grafast": patch
+---
+
+Introduce `trap()` step to trap errors and inhibits, and coerce them to a chosen
+form (e.g. null, empty list).