diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index e18ee07..37fcefa 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.0.0"
+  ".": "1.0.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..2b762c6
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,8 @@
+# Changelog
+
+## 1.0.0 (2026-06-20)
+
+
+### Bug Fixes
+
+* **checker:** floor response time to 1ms; fix timezone-sensitive pruner test ([8f547ef](https://github.com/memetics19/pulse/commit/8f547ef642e3e4fedab26e6787d40ce0973bf315))