diff --git a/.github/workflows/minified-assets.yml b/.github/workflows/minified-assets.yml
new file mode 100644
index 0000000..99366fd
--- /dev/null
+++ b/.github/workflows/minified-assets.yml
@@ -0,0 +1,23 @@
+name: Minified assets
+on: [push]
+permissions:
+ contents: read
+jobs:
+ build:
+ runs-on: ubuntu-latest
+
+ steps:
+ # git checkout
+ - uses: actions/checkout@v2
+
+ # node setup (esbuild is fetched on the fly via npx)
+ - name: Set up Node
+ uses: actions/setup-node@v4
+ with:
+ node-version: 20
+
+ # regenerate redturtle_chefcookie(.tech).min.js and styles.min.css
+ # and fail if that produces a diff: it means a source file was
+ # edited without regenerating its minified counterpart.
+ - name: check minified assets are up to date
+ run: make check-minified
diff --git a/CHANGES.rst b/CHANGES.rst
index dd53a18..bb176b8 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -4,7 +4,10 @@ Changelog
3.0.1 (unreleased)
------------------
-- Nothing changed yet.
+- Serve minified versions of ``redturtle_chefcookie.js``, ``redturtle_chefcookie_tech.js`` and ``styles.css``.
+ [mamico]
+- Add ``defer`` attribute to injected script tags so they no longer block HTML parsing.
+ [mamico]
3.0.0 (2026-03-26)
diff --git a/DEVELOP.rst b/DEVELOP.rst
index cd8979a..9ab99fc 100644
--- a/DEVELOP.rst
+++ b/DEVELOP.rst
@@ -40,3 +40,19 @@ run a specific tox env:
$ tox -e py37-Plone52
+
+Minified JS/CSS assets
+-----------------------
+
+``redturtle_chefcookie.js``, ``redturtle_chefcookie_tech.js`` and ``styles.css``
+(under ``src/redturtle/chefcookie/browser/static/``) are shipped both as
+readable sources and as minified files that are actually served to the
+browser. If you edit one of those sources, regenerate the minified files
+with (requires Node/npx, esbuild is fetched on the fly)::
+
+ $ make minify
+
+CI (``.github/workflows/minified-assets.yml``) runs ``make check-minified``,
+which regenerates the minified files and fails if that produces a diff, to
+catch a source edited without regenerating its ``.min`` counterpart.
+
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..55bb5fb
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,39 @@
+STATIC_DIR = src/redturtle/chefcookie/browser/static
+ESBUILD = npx --yes esbuild@0.28.1
+
+JS_SOURCES = \
+ $(STATIC_DIR)/redturtle_chefcookie.js \
+ $(STATIC_DIR)/redturtle_chefcookie_tech.js
+JS_MINIFIED = $(JS_SOURCES:.js=.min.js)
+
+CSS_SOURCES = $(STATIC_DIR)/styles.css
+CSS_MINIFIED = $(CSS_SOURCES:.css=.min.css)
+
+.PHONY: minify minify-js minify-css check-minified
+
+minify: minify-js minify-css
+
+minify-js:
+ @for src in $(JS_SOURCES); do \
+ out="$${src%.js}.min.js"; \
+ echo "minifying $$src -> $$out"; \
+ $(ESBUILD) $$src --minify --outfile=$$out; \
+ done
+
+minify-css:
+ @for src in $(CSS_SOURCES); do \
+ out="$${src%.css}.min.css"; \
+ echo "minifying $$src -> $$out"; \
+ $(ESBUILD) $$src --minify --outfile=$$out; \
+ done
+
+# Regenerates the minified assets and fails if that changes anything that
+# is not already committed: catches the case where someone edited a source
+# file (redturtle_chefcookie.js, redturtle_chefcookie_tech.js, styles.css)
+# without regenerating its .min counterpart.
+# NOTE: this compares file *content* (git diff), not modification times:
+# git does not preserve mtimes on checkout, so an mtime-based check would
+# always "pass" right after a fresh clone/checkout in CI regardless of
+# which file was actually edited last.
+check-minified: minify
+ git diff --exit-code -- $(JS_MINIFIED) $(CSS_MINIFIED)
diff --git a/src/redturtle/chefcookie/browser/static/redturtle_chefcookie.min.js b/src/redturtle/chefcookie/browser/static/redturtle_chefcookie.min.js
new file mode 100644
index 0000000..762afe5
--- /dev/null
+++ b/src/redturtle/chefcookie/browser/static/redturtle_chefcookie.min.js
@@ -0,0 +1,69 @@
+class redturtlechefcookie extends chefcookie{showSettings(){this.logTracking("settings_open");let e=document.querySelector(".chefcookie__settings-container");e.classList.add("chefcookie__settings-container--visible"),e.style.minHeight=e.scrollHeight+"px",setTimeout(()=>{e.classList.contains("chefcookie__settings-container--visible")&&(e.style.height="auto"),e.focus()},this.animationSpeed),this.fixMaxHeight()}acceptAllScripts(){let e=[];this.config.settings.forEach(i=>{i.scripts!==void 0&&Object.entries(i.scripts).forEach(([c,t])=>{this.accept(c,!1)})})}switchSettingsLabelsOpen(){document.querySelector(".chefcookie__button--accept").style.display="block",document.querySelector(".chefcookie__button--settings").style.display="none"}buildDom(){document.body.insertAdjacentHTML("afterbegin",`
+