diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 0967ef4..8d6e472 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1 +1 @@
-{}
+{".":"1.1.0"}
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..2fe24de
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,16 @@
+# Changelog
+
+## 1.1.0 (2026-09-03)
+
+
+### Features
+
+* **conformance:** add v1 fixture suite and language-agnostic runner ([3b94285](https://github.com/wrightkit/language-provider-protocol/commit/3b94285f011f195dea5426dbe381b869b03427fd))
+* **conformance:** add x-demo-lang mock provider ([3a6b301](https://github.com/wrightkit/language-provider-protocol/commit/3a6b3015ba43ca7ef6386e9fb121e07cde4735e7))
+* **lpp:** add entry-based project loading ([#17](https://github.com/wrightkit/language-provider-protocol/issues/17)) ([cac74c1](https://github.com/wrightkit/language-provider-protocol/commit/cac74c1b00596c75869c69fadab576a1d4897942))
+* **spec:** define LPP v1 wire protocol and conformance contract ([846e40c](https://github.com/wrightkit/language-provider-protocol/commit/846e40c79d0b55b34888897536b4cb177c57fd69))
+
+
+### Performance Improvements
+
+* **ci:** share one bounded Rust cache ([#8](https://github.com/wrightkit/language-provider-protocol/issues/8)) ([05ce40a](https://github.com/wrightkit/language-provider-protocol/commit/05ce40ad5b67b9f9aad584768e966ea0b4470040))
diff --git a/version.txt b/version.txt
index 6e8bf73..9084fa2 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-0.1.0
+1.1.0