diff --git a/.gitignore b/.gitignore
index e027dd6..1fe51d3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+report.html
 node_modules
 .shadow-cljs
 resources/public/js
diff --git a/README.md b/README.md
index 44fd419..596b0a6 100644
--- a/README.md
+++ b/README.md
@@ -1,9 +1,27 @@
 # Rect-Packing
 
+This folder contains a small project that aims to help in finding a good way to position individual cuttings on a frame. It is currently a work in progress.
+
+## Dev environment
+
 This project is built using `shadow-cljs`:
 
 ``` bash
 npx shadow-cljs watch :app
 ```
 
-Use `cider-connect-cljs` to connect to the REPL in emacs after opening http://localhost:8080 in your browser. :)
+Use `cider-connect-cljs` to connect to the REPL in emacs after opening http://localhost:8080 in your browser. Alternatively you can just call `cider-jack-in-cljs` and select the app build. :)
+
+### Production Build
+
+``` bash
+npx shadow-cljs release :app
+```
+
+A [build report](https://shadow-cljs.github.io/docs/UsersGuide.html#build-report) will automatically be created and written to `resources/public/js/report.html`.
+
+## Tentative Roadmap
+
+- [ ] Warn when rects don't fit the given frame(s)
+- [ ] Show coverage quote
+- [ ] Allow multiple frames
diff --git a/deps.edn b/deps.edn
index 8cd8c94..3a34322 100644
--- a/deps.edn
+++ b/deps.edn
@@ -1,14 +1,12 @@
 {:paths ["src" "resources"]
  :deps {org.clojure/clojure {:mvn/version "1.10.0"}
-        thi.ng/geom {:mvn/version "1.0.0-RC3"
+        thi.ng/geom {:mvn/version "1.0.0-RC4"
                      :exclusions [org.jogamp.jogl/jogl-all
-                                  org.jogamp.gluegen/gluegen-rt]}}
+                                  org.jogamp.gluegen/gluegen-rt]}
+        appliedscience/js-interop {:mvn/version "0.2.5"}
+        reagent/reagent {:mvn/version "1.1.0"}
+        fipp/fipp {:mvn/version "0.6.25"}}
  
  :aliases
- ;; clojurescript build tool and dependencies (see also shadow-cljs.edn)
- {:cljs {:extra-deps {thheller/shadow-cljs {:mvn/version "2.8.109"}
-                      appliedscience/js-interop {:mvn/version "0.2.5"}
-                      reagent/reagent {:mvn/version "1.1.0"}
-                      fipp/fipp {:mvn/version "0.6.25"}
-                      #_#_ refactor-nrepl/refactor-nrepl {:mvn/version "3.1.0"}
-                      #_#_ cider/cider-nrepl {:mvn/version "0.27.2"}}}}}
+ ;; clojurescript build tool (see also shadow-cljs.edn)
+ {:cljs {:extra-deps {thheller/shadow-cljs {:mvn/version "2.16.10"}}}}}
diff --git a/dev/user.clj b/dev/user.clj
new file mode 100644
index 0000000..4ce40df
--- /dev/null
+++ b/dev/user.clj
@@ -0,0 +1,14 @@
+(ns user
+  (:require [shadow.cljs.devtools.api :as shadow]
+            [shadow.cljs.devtools.server :as server]))
+
+;; copied from https://docs.cider.mx/cider/cljs/shadow-cljs.html
+
+(defn cljs-repl
+  "Connects to a given build-id. Defaults to `:app`."
+  ([]
+   (cljs-repl :app))
+  ([build-id]
+   (server/start!)
+   (shadow/watch build-id)
+   (shadow/nrepl-select build-id)))
diff --git a/shadow-cljs.edn b/shadow-cljs.edn
index a1b44c4..d783aef 100644
--- a/shadow-cljs.edn
+++ b/shadow-cljs.edn
@@ -7,4 +7,4 @@
  {:app {:target :browser
         :output-dir "resources/public/js"
         :asset-path "/js"
-        :modules {:main {:entries [heyarne.rect-packing.core]}}}} }
+        :modules {:main {:entries [heyarne.rect-packing.core]}}}}}
diff --git a/src/heyarne/rect_packing/core.cljs b/src/heyarne/rect_packing/core.cljs
index ab98b42..4cb7a55 100644
--- a/src/heyarne/rect_packing/core.cljs
+++ b/src/heyarne/rect_packing/core.cljs
@@ -100,8 +100,11 @@
 (defn remove-rects-of-size! [size]
   (swap! state update :rects dissoc size))
 
-(defn inventory [rects]
+(defn inventory [frame rects]
   [:<>
+   [:h2 "Frames"]
+   [:pre (prn-str frame)]
+   [:h2 "Rectangles"]
    [order]
    (when (seq rects)
      [:<>
@@ -122,25 +125,25 @@
                             :title (str "Remove " n " items")} "❌"]])]])])
 
 (defn visualization [frame packed-rects]
-  [:svg.visualization {:viewBox "-0.5 -0.5 501 501" :xmlns "http://www.w3.org/2000/svg"}
-   [:rect {:width (geom/width frame)
-           :height (geom/height frame)}]
-   (for [[idx rect] (map-indexed vector packed-rects)
-         :let [[x y] (:p rect)
-               w (geom/width rect)
-               h (geom/height rect)]]
-     ^{:key idx} [:<>
-                  [:rect {:width w :height h :x x :y y}]
-                  [:text {:x x :y y :dx 4 :dy 14} (str w "x" h)]])])
+  [:<>
+   [:h1 "Visualization"]
+   [:svg.visualization {:viewBox "-0.5 -0.5 501 501" :xmlns "http://www.w3.org/2000/svg"}
+    [:rect {:width (geom/width frame)
+            :height (geom/height frame)}]
+    (for [[idx rect] (map-indexed vector packed-rects)
+          :let [[x y] (:p rect)
+                w (geom/width rect)
+                h (geom/height rect)]]
+      ^{:key idx} [:<>
+                   [:rect {:width w :height h :x x :y y}]
+                   [:text {:x x :y y :dx 4 :dy 14} (str w "x" h)]])]])
 
 (defn main []
   (let [{:keys [frame rects]} @state
         packed @packed-rects]
     [:main
-     [:h1 "Visualization"]
      [visualization frame packed]
-     [:h2 "Rectangles"]
-     [inventory rects]]))
+     [inventory frame rects]]))
 
 (defn ^:dev/after-load init []
   (println "Initializing…")