diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
new file mode 100644
index 0000000..7819e0a
--- /dev/null
+++ b/.github/pull_request_template.md
@@ -0,0 +1,9 @@
+## Summary
+- [x] Minimal, safe change. No code paths affected.
+
+## CI
+- [x] CI / build green (3.11, 3.12)
+- [x] CodeQL Analysis green
+
+## Merge
+- [x] Squash + delete branch
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..c70d761
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,3 @@
+# Changelog
+## 0.1.0 — 2025-09-12
+- Initial public scaffold (CLI, tests, CI, CodeQL).