diff --git a/.gitignore b/.gitignore
index e35d885..a2aca41 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,17 @@
-_build
+# OCaml build artifacts
+_build/
+*.install
+*.merlin
+
+# Third-party sources (fetch locally with opam source)
+third_party/
+
+# Editor and OS files
+.DS_Store
+*.swp
+*~
+.vscode/
+.idea/
+
+# Opam local switch
+_opam/
diff --git a/dune-project b/dune-project
index d2a478e..32e04f7 100644
--- a/dune-project
+++ b/dune-project
@@ -8,7 +8,7 @@
 (authors "Anil Madhavapeddy")
 (homepage "https://tangled.sh/@anil.recoil.org/xdge")
 (maintainers "Anil Madhavapeddy <anil@recoil.org>")
-(bug_reports "https://tangled.sh/@anil.recoil.org/xgde/issues")
+(bug_reports "https://tangled.sh/@anil.recoil.org/xdge/issues")
 (maintenance_intent "(latest)")
 
 (package
@@ -24,7 +24,7 @@
   (ocaml (>= 5.1.0))
   (eio (>= 1.1))
   (cmdliner (>= 1.2.0))
-  (fmt (>= 0.11.0))
+  fmt
   xdg
   (eio_main :with-test)
   (odoc :with-doc)
diff --git a/lib/xdge.ml b/lib/xdge.ml
index fe17770..83be481 100644
--- a/lib/xdge.ml
+++ b/lib/xdge.ml
@@ -1,3 +1,8 @@
+(*---------------------------------------------------------------------------
+  Copyright (c) 2025 Anil Madhavapeddy <anil@recoil.org>. All rights reserved.
+  SPDX-License-Identifier: ISC
+ ---------------------------------------------------------------------------*)
+
 type source = Default | Env of string | Cmdline
 
 type t = {
diff --git a/lib/xdge.mli b/lib/xdge.mli
index 29e9bd9..0c0af20 100644
--- a/lib/xdge.mli
+++ b/lib/xdge.mli
@@ -1,3 +1,8 @@
+(*---------------------------------------------------------------------------
+  Copyright (c) 2025 Anil Madhavapeddy <anil@recoil.org>. All rights reserved.
+  SPDX-License-Identifier: ISC
+ ---------------------------------------------------------------------------*)
+
 (** XDG Base Directory Specification support with Eio capabilities
 
     This library provides an OCaml implementation of the XDG Base Directory
diff --git a/test/test_paths.ml b/test/test_paths.ml
index c4acb39..38d58dd 100644
--- a/test/test_paths.ml
+++ b/test/test_paths.ml
@@ -1,3 +1,8 @@
+(*---------------------------------------------------------------------------
+  Copyright (c) 2025 Anil Madhavapeddy <anil@recoil.org>. All rights reserved.
+  SPDX-License-Identifier: ISC
+ ---------------------------------------------------------------------------*)
+
 let test_path_validation () =
   Printf.printf "Testing XDG path validation...\n";
   (* Test absolute path validation for environment variables *)
diff --git a/test/test_paths.mli b/test/test_paths.mli
index e69de29..f979fcc 100644
--- a/test/test_paths.mli
+++ b/test/test_paths.mli
@@ -0,0 +1,4 @@
+(*---------------------------------------------------------------------------
+  Copyright (c) 2025 Anil Madhavapeddy <anil@recoil.org>. All rights reserved.
+  SPDX-License-Identifier: ISC
+ ---------------------------------------------------------------------------*)
diff --git a/test/xdg_example.ml b/test/xdg_example.ml
index 9515987..2f2c905 100644
--- a/test/xdg_example.ml
+++ b/test/xdg_example.ml
@@ -1,3 +1,8 @@
+(*---------------------------------------------------------------------------
+  Copyright (c) 2025 Anil Madhavapeddy <anil@recoil.org>. All rights reserved.
+  SPDX-License-Identifier: ISC
+ ---------------------------------------------------------------------------*)
+
 let run (xdg, cfg) =
   Fmt.pr "%a@.%a@.@.%a@.%a@."
     Fmt.(styled `Bold string)
diff --git a/test/xdg_example.mli b/test/xdg_example.mli
index e69de29..f979fcc 100644
--- a/test/xdg_example.mli
+++ b/test/xdg_example.mli
@@ -0,0 +1,4 @@
+(*---------------------------------------------------------------------------
+  Copyright (c) 2025 Anil Madhavapeddy <anil@recoil.org>. All rights reserved.
+  SPDX-License-Identifier: ISC
+ ---------------------------------------------------------------------------*)
diff --git a/xdge.opam b/xdge.opam
index c637a76..d9622f9 100644
--- a/xdge.opam
+++ b/xdge.opam
@@ -7,7 +7,7 @@ maintainer: ["Anil Madhavapeddy <anil@recoil.org>"]
 authors: ["Anil Madhavapeddy"]
 license: "ISC"
 homepage: "https://tangled.sh/@anil.recoil.org/xdge"
-bug-reports: "https://tangled.sh/@anil.recoil.org/xgde/issues"
+bug-reports: "https://tangled.sh/@anil.recoil.org/xdge/issues"
 depends: [
   "dune" {>= "3.20"}
   "ocaml" {>= "5.1.0"}