diff --git a/.changeset/brave-nimbus-docs.md b/.changeset/brave-nimbus-docs.md
deleted file mode 100644
index 6b3632c..0000000
--- a/.changeset/brave-nimbus-docs.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-"@cloudflare/polystella": patch
----
-
-Document the requirement to add a Changesets entry for package-affecting changes and record the docs migration to Nimbus.
diff --git a/.changeset/cozy-doodles-lick.md b/.changeset/cozy-doodles-lick.md
deleted file mode 100644
index 660f14d..0000000
--- a/.changeset/cozy-doodles-lick.md
+++ /dev/null
@@ -1,4 +0,0 @@
----
----
-
-Add maintainer-triggered pollystellabot review automation.
diff --git a/.changeset/silver-parrots-parse.md b/.changeset/silver-parrots-parse.md
deleted file mode 100644
index 502f963..0000000
--- a/.changeset/silver-parrots-parse.md
+++ /dev/null
@@ -1,7 +0,0 @@
----
-"@cloudflare/polystella": minor
----
-
-Default Markdown and MDX parsing to Satteri, with `markdown.parser: "remark"` available as a legacy compatibility escape hatch. The parser choice is now part of the Markdown/MDX extraction policy hash, so Satteri and Remark outputs use separate cache entries.
-
-This release also updates the package and playground/docs fixtures for Astro 7, reconstructs missing Satteri MDX ESTree metadata needed by static-data extraction and MDX audits, rewrites relative MDX imports only in staged translated files, and refreshes the local staging-cache index version to avoid stale staged MDX output.
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f8b9c6e..eeb2bbe 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,17 @@
 # Changelog
 
+## 0.4.0
+
+### Minor Changes
+
+- [#14](https://github.com/cloudflare/polystella/pull/14) [`6122f6f`](https://github.com/cloudflare/polystella/commit/6122f6fe64927aa3aa5d8d6fdf0aa670dbda2fa7) Thanks [@diogoascarneiro](https://github.com/diogoascarneiro)! - Default Markdown and MDX parsing to Satteri, with `markdown.parser: "remark"` available as a legacy compatibility escape hatch. The parser choice is now part of the Markdown/MDX extraction policy hash, so Satteri and Remark outputs use separate cache entries.
+
+  This release also updates the package and playground/docs fixtures for Astro 7, reconstructs missing Satteri MDX ESTree metadata needed by static-data extraction and MDX audits, rewrites relative MDX imports only in staged translated files, and refreshes the local staging-cache index version to avoid stale staged MDX output.
+
+### Patch Changes
+
+- [#15](https://github.com/cloudflare/polystella/pull/15) [`8120b2f`](https://github.com/cloudflare/polystella/commit/8120b2f354152b7577040f97f73542019e930439) Thanks [@diogoascarneiro](https://github.com/diogoascarneiro)! - Document the requirement to add a Changesets entry for package-affecting changes and record the docs migration to Nimbus.
+
 All notable changes to PolyStella are tracked here. The format
 follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/);
 published releases follow [semver](https://semver.org/) pre-1.0
diff --git a/package.json b/package.json
index 41e4c0c..c4aa1ba 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@cloudflare/polystella",
-  "version": "0.3.1",
+  "version": "0.4.0",
   "type": "module",
   "description": "AI-driven content localization for Astro (build-time markdown translation, R2-cached).",
   "license": "MIT",
diff --git a/playgrounds/mdx-jsx/CHANGELOG.md b/playgrounds/mdx-jsx/CHANGELOG.md
new file mode 100644
index 0000000..cd8d7d1
--- /dev/null
+++ b/playgrounds/mdx-jsx/CHANGELOG.md
@@ -0,0 +1,8 @@
+# polystella-playground-mdx-jsx
+
+## 0.0.1
+
+### Patch Changes
+
+- Updated dependencies [[`8120b2f`](https://github.com/cloudflare/polystella/commit/8120b2f354152b7577040f97f73542019e930439), [`6122f6f`](https://github.com/cloudflare/polystella/commit/6122f6fe64927aa3aa5d8d6fdf0aa670dbda2fa7)]:
+  - @cloudflare/polystella@0.4.0
diff --git a/playgrounds/mdx-jsx/package.json b/playgrounds/mdx-jsx/package.json
index ac8d49f..b7cf518 100644
--- a/playgrounds/mdx-jsx/package.json
+++ b/playgrounds/mdx-jsx/package.json
@@ -1,6 +1,6 @@
 {
   "name": "polystella-playground-mdx-jsx",
-  "version": "0.0.0",
+  "version": "0.0.1",
   "private": true,
   "type": "module",
   "description": "PolyStella MDX/JSX behavior playground.",