diff --git a/.changeset/silent-pandas-talk.md b/.changeset/silent-pandas-talk.md
new file mode 100644
index 0000000..c779b5c
--- /dev/null
+++ b/.changeset/silent-pandas-talk.md
@@ -0,0 +1,5 @@
+---
+"windpipe": minor
+---
+
+create new `ofError` and `ofUnknown` static methods for creating a stream
diff --git a/.changeset/three-forks-learn.md b/.changeset/three-forks-learn.md
new file mode 100644
index 0000000..3c13601
--- /dev/null
+++ b/.changeset/three-forks-learn.md
@@ -0,0 +1,5 @@
+---
+"windpipe": minor
+---
+
+alter exported API