diff --git a/bb.edn b/bb.edn
index e42700a..0cf32eb 100644
--- a/bb.edn
+++ b/bb.edn
@@ -15,6 +15,7 @@
          :enter (let [{:keys [name]} (current-task)] (status/line :head "TASK %s %s" name (string/join " " *command-line-args*)))
          :leave (let [{:keys [name]} (current-task)] (status/line :detail "\nTASK %s done." name))
          ;; commands
+         clean             {:task clean/-main             :doc "delete all build work"}
          download-deps     {:task download-deps/-main     :doc "bring down Clojure deps"}
          apply-import-vars {:task apply-import-vars/-main :doc "(check|gen-code) - export APIs statically from templates"}
          dev-jvm           {:task dev-repl/dev-jvm        :doc "launch jvm nREPL for development, --help for usage"}
diff --git a/doc/02-developer-guide.adoc b/doc/02-developer-guide.adoc
index 99d7ed4..4cda414 100644
--- a/doc/02-developer-guide.adoc
+++ b/doc/02-developer-guide.adoc
@@ -95,6 +95,13 @@ bb lint --help
 
 Tasks are described throughout this document.
 
+== Clean
+Sometimes you want to turf any local build work and caches, you can do so via:
+
+----
+bb clean
+----
+
 == Code Generation
 Rewrite-clj v0 used a version of potemkin import-vars.
 Potemkin import-vars copies specified vars from a specified namespace to the current namespace at load time.
diff --git a/script/clean.clj b/script/clean.clj
new file mode 100644
index 0000000..7e72e06
--- /dev/null
+++ b/script/clean.clj
@@ -0,0 +1,18 @@
+(ns clean
+  (:require [babashka.fs :as fs]
+            [helper.main :as main]))
+
+(defn -main [& args]
+  (when (main/doc-arg-opt args)
+    (println "Deleting (d=deleted -=did not exist)")
+    (run! (fn [d]
+            (println (format "[%s] %s"
+                             (if (fs/exists? d) "d" "-")
+                             d))
+            (fs/delete-tree d {:force true}))
+          ["target"
+           ".cpcache"
+           ".clj-kondo/.cache"
+           ".lsp/.cache"
+           ".eastwood"
+           ".shadow-cljs"])))
diff --git a/script/download_deps.clj b/script/download_deps.clj
index 688f76a..721a25c 100644
--- a/script/download_deps.clj
+++ b/script/download_deps.clj
@@ -1,9 +1,11 @@
 (ns download-deps
-  (:require [babashka.tasks :as t]))
+  (:require [babashka.tasks :as t]
+            [helper.main :as main]))
 
 ;; clojure has a -P command, but to bring down all deps we need to specify all aliases
 ;; bb deps will be brought down just from running bb (which assumedly is how this code is run)
 
-(defn -main [& _args]
-  ;; do all the work from build.clj to avoid repeated JVM launch costs
-  (t/clojure "-T:build download-deps"))
+(defn -main [& args]
+  (when (main/doc-arg-opt args)
+    ;; do all the work from build.clj to avoid repeated JVM launch costs
+    (t/clojure "-T:build download-deps")))