diff --git a/_templates/cloudflare/pages-tinygo/go.sum b/_templates/cloudflare/pages-tinygo/go.sum
new file mode 100644
index 0000000..41e78f1
--- /dev/null
+++ b/_templates/cloudflare/pages-tinygo/go.sum
@@ -0,0 +1 @@
+github.com/go-chi/chi/v5 v5.0.8/go.mod h1:DslCQbL2OYiznFReuXYUmQ2hGd1aDpCnlMNITLSKoi8=
diff --git a/cmd/workers-assets-gen/README.md b/cmd/workers-assets-gen/README.md
new file mode 100644
index 0000000..7cce24d
--- /dev/null
+++ b/cmd/workers-assets-gen/README.md
@@ -0,0 +1,15 @@
+# workers-assets-gen
+
+* `workers-assets-gen` command generates files needed to run `workers` package.
+  - e.g. wasm_exec.js, worker.mjs ...
+
+## Usage
+
+* See `Makefile` in [templates](https://github.com/syumai/workers/tree/main/_templates/cloudflare/worker-tinygo).
+
+## Supported options
+
+* `-mode`
+  - switch generated file depends on Go / TinyGo.
+* `-o`
+  - change output directory (default: `build`)