diff --git a/.prototools b/.prototools
index a96057b..0d0e387 100644
--- a/.prototools
+++ b/.prototools
@@ -10,6 +10,7 @@ deno = "1.41.2"
 dprint = "0.45.0"
 flyctl = "0.2.13"
 gitleaks = "8.18.2"
+grain = "0.6.1"
 gum = "0.13.0"
 hurl = "4.2.0"
 # lacks aarch64-apple-darwin support
@@ -45,6 +46,7 @@ dagger = "source:dagger/plugin.toml"
 dprint = "source:dprint/plugin.toml"
 flyctl = "source:flyctl/plugin.toml"
 gitleaks = "source:gitleaks/plugin.toml"
+grain = "source:grain/plugin.toml"
 gum = "source:gum/plugin.toml"
 hurl = "source:hurl/plugin.toml"
 hyperfine = "source:hyperfine/plugin.toml"
diff --git a/grain/README.md b/grain/README.md
new file mode 100644
index 0000000..3762de1
--- /dev/null
+++ b/grain/README.md
@@ -0,0 +1,21 @@
+# Grain plugin
+
+[Grain](https://grain-lang.org) plugin for [proto](https://github.com/moonrepo/proto).
+
+## Installation
+
+This is a community plugin and is thus not built-in to proto. In order to use it, first either add it to your global or project-based `.prototools` by running:
+
+### Global install
+
+```shell
+proto plugin add grain "source:https://raw.githubusercontent.com/Phault/proto-toml-plugins/main/grain/plugin.toml" --global
+proto install grain
+```
+
+## Per-project install
+
+```shell
+proto plugin add grain "source:https://raw.githubusercontent.com/Phault/proto-toml-plugins/main/grain/plugin.toml"
+proto pin grain latest --resolve
+```
diff --git a/grain/plugin.toml b/grain/plugin.toml
new file mode 100644
index 0000000..468eba8
--- /dev/null
+++ b/grain/plugin.toml
@@ -0,0 +1,25 @@
+name = "Grain"
+type = "language"
+
+[resolve]
+git-url = "https://github.com/grain-lang/grain"
+version-pattern = "^grain-v((?<major>[0-9]+)\\.(?<minor>[0-9]+)\\.(?<patch>[0-9]+)(?<pre>-[^+]+)?)"
+
+[platform.linux]
+archs = ["x64"]
+download-file = "grain-linux-{arch}"
+
+[platform.macos]
+archs = ["x64"]
+download-file = "grain-mac-{arch}"
+
+[platform.windows]
+archs = ["x64"]
+download-file = "grain-win-{arch}.exe"
+
+[install]
+download-url = "https://github.com/grain-lang/grain/releases/download/grain-v{version}/{download_file}"
+unpack = false
+
+[install.arch]
+x86_64 = "x64"