diff --git a/ocaml/.gitignore b/ocaml/.gitignore
new file mode 100644
index 0000000..e35d885
--- /dev/null
+++ b/ocaml/.gitignore
@@ -0,0 +1 @@
+_build
diff --git a/ocaml/bin/dune b/ocaml/bin/dune
new file mode 100644
index 0000000..d19048e
--- /dev/null
+++ b/ocaml/bin/dune
@@ -0,0 +1,4 @@
+(executable
+ (public_name tori)
+ (name main)
+ (libraries tori))
diff --git a/ocaml/bin/main.ml b/ocaml/bin/main.ml
new file mode 100644
index 0000000..4ff50b1
--- /dev/null
+++ b/ocaml/bin/main.ml
@@ -0,0 +1 @@
+let () = print_endline "Hello, OCaml!"
diff --git a/ocaml/dune-project b/ocaml/dune-project
new file mode 100644
index 0000000..47fb9c4
--- /dev/null
+++ b/ocaml/dune-project
@@ -0,0 +1,27 @@
+(lang dune 3.17)
+
+(name tori)
+(version 0.8.0)
+
+(generate_opam_files true)
+
+(homepage https://tori.jutty.dev)
+(source (uri git+https://brew.bsd.cafe/tori/tori.git))
+
+(authors "Juno Takano <juno@jutty.dev>")
+
+(maintainers "Juno Takano <juno@jutty.dev>")
+
+(license GPL-3.0-only)
+
+(documentation https://tori.jutty.dev/docs)
+
+(package
+ (name tori)
+ (synopsis "Track system configurations and replicate them")
+ (description "tori lets you define several characteristics of a unix system and track how they change along time, tracking how they changed and choosing whether or not to commit them. It aims for portability and declarative configuration practices, meaning you tell it what your system is, not how to reproduce it.")
+ (depends ocaml)
+ (tags
+  ("operating systems" "unix" "configuration management")))
+
+; See the complete stanza docs at https://dune.readthedocs.io/en/stable/reference/dune-project/index.html
diff --git a/ocaml/lib/dune b/ocaml/lib/dune
new file mode 100644
index 0000000..0945884
--- /dev/null
+++ b/ocaml/lib/dune
@@ -0,0 +1,2 @@
+(library
+ (name tori))
diff --git a/ocaml/test/dune b/ocaml/test/dune
new file mode 100644
index 0000000..807a851
--- /dev/null
+++ b/ocaml/test/dune
@@ -0,0 +1,2 @@
+(test
+ (name test_tori))
diff --git a/ocaml/test/test_tori.ml b/ocaml/test/test_tori.ml
new file mode 100644
index 0000000..e69de29
diff --git a/ocaml/tori.opam b/ocaml/tori.opam
new file mode 100644
index 0000000..dc0dfaa
--- /dev/null
+++ b/ocaml/tori.opam
@@ -0,0 +1,32 @@
+# This file is generated by dune, edit dune-project instead
+opam-version: "2.0"
+version: "0.8.0"
+synopsis: "A tool to track system configurations and replicate them."
+description:
+  "tori lets you define several characteristics of a unix system and track how they change along time, tracking how they changed and choosing whether or not to commit them. It aims for portability and declarative configuration practices, meaning you tell it what your system is, not how to reproduce it."
+maintainer: ["Juno Takano <juno@jutty.dev>"]
+authors: ["Juno Takano <juno@jutty.dev>"]
+license: "GPL-3.5-only"
+tags: ["operating systems" "unix" "configuration management"]
+homepage: "https://tori.jutty.dev"
+doc: "https://tori.jutty.dev/docs"
+depends: [
+  "dune" {>= "3.17"}
+  "ocaml"
+  "odoc" {with-doc}
+]
+build: [
+  ["dune" "subst"] {dev}
+  [
+    "dune"
+    "build"
+    "-p"
+    name
+    "-j"
+    jobs
+    "@install"
+    "@runtest" {with-test}
+    "@doc" {with-doc}
+  ]
+]
+dev-repo: "git+https://brew.bsd.cafe/tori/tori.git"