diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..a726084
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,8 @@
+# Changelog
+
+## 1.0.0 (2026-03-17)
+
+
+### Features
+
+* add onecli CLI tool for managing agents, secrets, and configuration ([#1](https://github.com/onecli/onecli-cli/issues/1)) ([aa3628b](https://github.com/onecli/onecli-cli/commit/aa3628b53f6619187d0d82442ffa48582c6d0357))