diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 96d9691..1772e6f 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-    ".": "0.1.0"
+    ".": "1.0.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..58eb4fc
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,18 @@
+# Changelog
+
+## 1.0.0 (2026-09-01)
+
+
+### Features
+
+* a2a go as a base for the official cli ([#2](https://github.com/a2aproject/a2a-cli/issues/2)) ([9ef85ca](https://github.com/a2aproject/a2a-cli/commit/9ef85ca18ba6dc475d38a1093877a4462ec11fb7))
+* add a2a-cli specification v0.2 reviewed ([#1](https://github.com/a2aproject/a2a-cli/issues/1)) ([6a0906c](https://github.com/a2aproject/a2a-cli/commit/6a0906c50971071ad86a16024f30887de82dcae4))
+* cli -> spec reconciliation for tier 1 features ([#9](https://github.com/a2aproject/a2a-cli/issues/9)) ([f9a143b](https://github.com/a2aproject/a2a-cli/commit/f9a143b52d22269ccf817889621f8c1e92c72cdb))
+* cli pluggable transport ([#24](https://github.com/a2aproject/a2a-cli/issues/24)) ([fc49c26](https://github.com/a2aproject/a2a-cli/commit/fc49c26ff39a0c611c458a8b30195fdf0a16dc13))
+* implement agent card file path support ([#22](https://github.com/a2aproject/a2a-cli/issues/22)) ([836c373](https://github.com/a2aproject/a2a-cli/commit/836c3738b6ba52e6922d6d8aaf34d11130bba7c5))
+* mplement config loading from .env files ([#12](https://github.com/a2aproject/a2a-cli/issues/12)) ([cb1c91b](https://github.com/a2aproject/a2a-cli/commit/cb1c91b60dcac90679a997b04a4c372755fa03a0))
+
+
+### Bug Fixes
+
+* address cli issues discovered during code audit ([#14](https://github.com/a2aproject/a2a-cli/issues/14)) ([fdbb3aa](https://github.com/a2aproject/a2a-cli/commit/fdbb3aad6289c0070480147a29e04c3d46aa6c2f))