$ opam switch create 5.2.0

<><> Installing new switch packages <><><><><><><><><><><><><><><><><><><><><><>
Switch invariant: ["ocaml-base-compiler" {= "5.2.0"} | "ocaml-system" {= "5.2.0"}]

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
∗ installed base-bigarray.base
∗ installed base-threads.base
∗ installed base-unix.base
∗ installed ocaml-options-vanilla.1
⬇ retrieved ocaml-config.3  (2 extra sources)
⬇ retrieved ocaml-base-compiler.5.2.0  (https://opam.ocaml.org/cache)
Processing 18/27: [ocaml-base-compiler: make]
∗ installed ocaml-base-compiler.5.2.0
∗ installed ocaml-config.3
∗ installed ocaml.5.2.0
∗ installed base-domains.base
∗ installed base-nnp.base
Done.
# Run eval $(opam env --switch=5.2.0) to update the current shell environment

$ ocaml -version
The OCaml toplevel, version 4.14.1

# 環境の一覧を表示
$ opam switch list
#  switch   compiler                   description
→  5.2.0    ocaml-base-compiler.5.2.0  5.2.0
   default  ocaml.4.14.1               default

[WARNING] The environment is not in sync with the current switch.
          You should run: eval $(opam env)

# 更新
$ eval $(opam env)
$ ocaml --version
The OCaml toplevel, version 5.2.0

# ocamlの設定
if [ -d "$HOME/.opam" ] && command -v opam > /dev/null 2>&1; then
   eval "$(opam env)"
fi

$ ocaml --version
The OCaml toplevel, version 5.2.0

$ ocaml -e 'print_endline "hello world!"'
hello world!

$ ocaml -e 'Printf.printf "Hello, world! (OCaml version: %s)\n" Sys.ocaml_version;;'
Hello, world! (OCaml version: 5.2.0)

$ cp /mnt/c/Users/<user>/AppData/Roaming/Code/User/keybindings.json  /mnt/c/Users/<user>/AppData/Roaming/Code/User/profiles/<profile>/

$ opam install . --deps-only
$ dune build

.
├── README.md
├── bin
│   ├── dune
│   └── main.ml
├── dune-project
├── lib
│   ├── config.ml
│   ├── config.mli
│   ├── dune
│   ├── gist_uploader.ml
│   └── gist_uploader.mli
└── ocaml-gist-uploader.opam

3 directories, 10 files

diff --git a/.gitignore b/.gitignore
index 14a8d2a..6d4f97c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,4 +12,7 @@ _opam/
 *.o
 
 # Editors
-.merlin
\ No newline at end of file
+.merlin
+
+# credentials
+config.json
\ No newline at end of file
diff --git a/README.md b/README.md
index 8e8bbb1..02125a4 100644
--- a/README.md
+++ b/README.md
@@ -23,12 +23,17 @@ OCamlで書かれた、ファイルをGitHub Gistにアップロードするた
     cd ocaml-gist-uploader
     ```
 
-2.  依存関係をインストールします。
+2.  opamパッケージリストを更新します。（初回や依存関係エラーが出る場合に実行）
+    ```bash
+    opam update
+    ```
+
+3.  依存関係をインストールします。
     ```bash
     opam install . --deps-only
     ```
 
-3.  プロジェクトをビルドします。
+4.  プロジェクトをビルドします。
     ```bash
     dune build
     ```
diff --git a/bin/main.ml b/bin/main.ml
index 77a7619..b9f9312 100644
--- a/bin/main.ml
+++ b/bin/main.ml
@@ -45,6 +45,14 @@ let run_upload public title config_path auto_mode filepath =
               let error_msg = Printf.sprintf "Failed to upload Gist: %s" msg in
               Lwt.return (`Error (false, error_msg))
 
+let run_upload_sync public title config_path auto_mode filepath =
+  match Lwt_main.run (run_upload public title config_path auto_mode filepath) with
+  | `Ok () -> ()
+  | `Error (show_help, msg) ->
+      if show_help then Fmt.epr "%s\n%!" "@help@"
+      else Fmt.epr "Error: %s\n%!" msg;
+      exit 1
+
 (* Cmdliner setup *)
 open Cmdliner
 
@@ -71,7 +79,7 @@ let filepath =
   Arg.(required & pos 0 (some file) None & info [] ~docv:"FILE" ~doc)
 
 let main_term =
-  Term.(const run_upload $ public $ title $ config_path $ auto_mode $ filepath)
+  Term.(const run_upload_sync $ public $ title $ config_path $ auto_mode $ filepath)
 
 let cmd =
   let doc = "Upload a file to GitHub Gist" in
@@ -83,12 +91,4 @@ let cmd =
   in
   Cmd.v (Cmd.info "gist-uploader" ~version:"0.1.0" ~doc ~man) main_term
 
-let () =
-  let promise = main_term in
-  match Lwt_main.run promise with
-  | `Ok () -> exit 0
-  | `Error (show_help, msg) ->
-      if show_help then Fmt.epr "%s\n%!" (Cmd.help cmd)
-      else Fmt.epr "Error: %s\n%!" msg;
-      exit 1
-  | _ -> exit 1
\ No newline at end of file
+let () = ignore (Cmd.eval cmd)
\ No newline at end of file
diff --git a/dune-project b/dune-project
index 6ec3c25..b0c0627 100644
--- a/dune-project
+++ b/dune-project
@@ -1,6 +1,14 @@
 (lang dune 3.12)
 (name ocaml-gist-uploader)
 (generate_opam_files true)
-(source (github ocaml-gist-uploader/ocaml-gist-uploader))
-(authors "Your Name")
-(maintainers "Your Name <your-email@example.com>")
\ No newline at end of file
+
+(package
+ (name ocaml-gist-uploader)
+ (synopsis "A command-line tool to upload files to GitHub Gist")
+ (description "A command-line tool to upload files to GitHub Gist.")
+ (authors "Your Name")
+ (maintainers "Your Name <your-email@example.com>")
+ (license MIT)
+ (source (github ocaml-gist-uploader/ocaml-gist-uploader))
+ (homepage "https://github.com/ocaml-gist-uploader/ocaml-gist-uploader")
+ )
\ No newline at end of file
diff --git a/lib/config.ml b/lib/config.ml
index 627c96a..11a66de 100644
--- a/lib/config.ml
+++ b/lib/config.ml
@@ -7,7 +7,7 @@ let get_api_key { api_key } = api_key
 let from_file path =
   Lwt.catch
     (fun () ->
-      let* json = Yojson.Safe.Lwt.from_file path in
+      let* json = Lwt_preemptive.detach Yojson.Safe.from_file path in
       match Yojson.Safe.Util.member "apikey" json with
       | `String api_key -> Lwt.return_ok { api_key }
       | _ -> Lwt.return_error "JSON file must contain an 'apikey' field with a string value.")
diff --git a/lib/dune b/lib/dune
index d97283d..42b1b14 100644
--- a/lib/dune
+++ b/lib/dune
@@ -1,4 +1,4 @@
 (library
  (name ocaml_gist_uploader)
  (public_name ocaml-gist-uploader)
- (libraries lwt lwt.unix lwt_process cohttp-lwt-unix yojson))
\ No newline at end of file
+ (libraries lwt lwt.unix cohttp-lwt-unix yojson))
\ No newline at end of file
diff --git a/ocaml-gist-uploader.opam b/ocaml-gist-uploader.opam
index 11faccf..2c9988c 100644
--- a/ocaml-gist-uploader.opam
+++ b/ocaml-gist-uploader.opam
@@ -1,18 +1,15 @@
 # This file is generated by dune, edit dune-project instead
 opam-version: "2.0"
 synopsis: "A command-line tool to upload files to GitHub Gist"
+description: "A command-line tool to upload files to GitHub Gist."
 maintainer: ["Your Name <your-email@example.com>"]
 authors: ["Your Name"]
-source: "https://github.com/ocaml-gist-uploader/ocaml-gist-uploader"
-bug-reports: "https://github.com/ocaml-gist-uploader/ocaml-gist-uploader/issues"
+license: "MIT"
+homepage: "https://github.com/ocaml-gist-uploader/ocaml-gist-uploader"
+bug-reports:
+  "https://github.com/ocaml-gist-uploader/ocaml-gist-uploader/issues"
 depends: [
-  "ocaml" {>= "5.0.0"}
   "dune" {>= "3.12"}
-  "cmdliner" {>= "1.1.0"}
-  "cohttp-lwt-unix" {>= "5.0.0"}
-  "lwt_ppx" {>= "2.1.0"}
-  "lwt_process" {>= "1.1.0"}
-  "yojson" {>= "2.1.0"}
   "odoc" {with-doc}
 ]
 build: [
@@ -28,4 +25,6 @@ build: [
     "@runtest" {with-test}
     "@doc" {with-doc}
   ]
-]
\ No newline at end of file
+]
+dev-repo:
+  "git+https://github.com/ocaml-gist-uploader/ocaml-gist-uploader.git"

# README.md をupload
$  ./_build/default/bin/main.exe README.md  --config config.json 

$ ./_build/default/bin/main.exe README.md  --config config.json Error: Failed to upload Gist: HTTP request failed: Failure("No SSL or TLS support compiled into Conduit. You must install it through opam with one of these commands: `opam install lwt_ssl` or `opam install tls-lwt`")
$ opam install lwt_ssl