diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7521fd5..e488fd6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,10 +4,12 @@ All notable changes are recorded here. Format follows
 [Keep a Changelog][kac]; releases follow [Semantic Versioning][semver]
 once the first stable tag ships.
 
-[kac]: https://keepachangelog.com/en/1.1.0/
-[semver]: https://semver.org/spec/v2.0.0.html
+## [Unreleased]
+
+## [0.1.0] - 2026-05-07
 
-## Unreleased
+First tagged release. Public surface (export names, AST schema,
+callback semantics) is still alpha and may change before 1.0.
 
 ### Added
 
@@ -35,3 +37,8 @@ once the first stable tag ships.
 
 - README badges (CI, OpenSSF Scorecard) now resolve. They were left
   pointing at `kanywst/zopa` after the repo moved to `0-draft/zopa`.
+
+[kac]: https://keepachangelog.com/en/1.1.0/
+[semver]: https://semver.org/spec/v2.0.0.html
+[Unreleased]: https://github.com/0-draft/zopa/compare/v0.1.0...HEAD
+[0.1.0]: https://github.com/0-draft/zopa/releases/tag/v0.1.0
diff --git a/build.zig.zon b/build.zig.zon
index 9270987..cc04fda 100644
--- a/build.zig.zon
+++ b/build.zig.zon
@@ -9,7 +9,7 @@
     .name = .zopa,
     // This is a [Semantic Version](https://semver.org/).
     // In a future version of Zig it will be used for package deduplication.
-    .version = "0.0.0",
+    .version = "0.1.0",
     // Together with name, this represents a globally unique package
     // identifier. This field is generated by the Zig toolchain when the
     // package is first created, and then *never changes*. This allows