diff --git a/README.md b/README.md
index a5ae965..ea34ce4 100644
--- a/README.md
+++ b/README.md
@@ -3,4 +3,16 @@
 Rust binding for [OpenSMTPD] filters.
 
 
+# Features
+
+This is a work in progress, the API is **not** stabilized yet.
+
+- [ ] Thread-pool
+- [x] Reports
+- [ ] Filters
+- [x] Session-level context
+- [ ] Pool-level context
+- [ ] Filter-level context
+
+
 [OpenSMTPD]: https://www.opensmtpd.org/