diff --git a/src/bin/owi.ml b/src/bin/owi.ml
index 329f5ce4..940c75fe 100644
--- a/src/bin/owi.ml
+++ b/src/bin/owi.ml
@@ -69,14 +69,6 @@ let outfile =
     & opt (some string_to_path) None
     & info [ "o"; "output" ] ~docv:"FILE" ~doc )
 
-let emit_file =
-  let doc = "Emit (.wat) files from corresponding (.wasm) files." in
-  Arg.(value & flag & info [ "emit-file" ] ~doc)
-
-let no_exhaustion =
-  let doc = "no exhaustion tests" in
-  Arg.(value & flag & info [ "no-exhaustion" ] ~doc)
-
 let no_stop_at_failure =
   let doc = "do not stop when a program failure is encountered" in
   Arg.(value & flag & info [ "no-stop-at-failure" ] ~doc)
@@ -115,14 +107,6 @@ let srac =
   let doc = "symbolic runtime assertion checking mode" in
   Arg.(value & flag & info [ "srac" ] ~doc)
 
-let eacsl =
-  let doc =
-    "e-acsl mode, refer to \
-     https://frama-c.com/download/e-acsl/e-acsl-implementation.pdf for \
-     Frama-C's current language feature implementations"
-  in
-  Arg.(value & flag & info [ "e-acsl" ] ~doc)
-
 let solver =
   let doc = "SMT solver to use" in
   Arg.(
@@ -130,10 +114,6 @@ let solver =
     & opt solver_conv Smtml.Solver_dispatcher.Z3_solver
     & info [ "solver"; "s" ] ~doc )
 
-let symbolic =
-  let doc = "generate instrumented module that depends on symbolic execution" in
-  Arg.(value & flag & info [ "symbolic" ] ~doc)
-
 let unsafe =
   let doc = "skip typechecking pass" in
   Arg.(value & flag & info [ "unsafe"; "u" ] ~doc)
@@ -176,7 +156,7 @@ let c_cmd =
   and+ testcomp =
     let doc = "test-comp mode" in
     Arg.(value & flag & info [ "testcomp" ] ~doc)
-  and+ output =
+  and+ workspace =
     let doc = "write results to dir" in
     Arg.(value & opt string "owi-out" & info [ "output"; "o" ] ~doc)
   and+ concolic =
@@ -193,12 +173,18 @@ let c_cmd =
   and+ no_assert_failure_expression_printing
   and+ deterministic_result_order
   and+ fail_mode
-  and+ eacsl
+  and+ eacsl =
+    let doc =
+      "e-acsl mode, refer to \
+       https://frama-c.com/download/e-acsl/e-acsl-implementation.pdf for \
+       Frama-C's current language feature implementations"
+    in
+    Arg.(value & flag & info [ "e-acsl" ] ~doc)
   and+ solver in
-  Cmd_c.cmd debug arch property testcomp output workers opt_lvl includes files
-    profiling unsafe optimize no_stop_at_failure no_values
-    no_assert_failure_expression_printing deterministic_result_order fail_mode
-    concolic eacsl solver
+  Cmd_c.cmd ~debug ~arch ~property ~testcomp ~workspace ~workers ~opt_lvl
+    ~includes ~files ~profiling ~unsafe ~optimize ~no_stop_at_failure ~no_values
+    ~no_assert_failure_expression_printing ~deterministic_result_order
+    ~fail_mode ~concolic ~eacsl ~solver
 
 (* owi fmt *)
 
@@ -212,7 +198,7 @@ let fmt_cmd =
     let doc = "Format in-place, overwriting input file" in
     Arg.(value & flag & info [ "inplace"; "i" ] ~doc)
   and+ files in
-  Cmd_fmt.cmd inplace files
+  Cmd_fmt.cmd ~inplace ~files
 
 (* owi opt *)
 
@@ -226,7 +212,7 @@ let opt_cmd =
   and+ unsafe
   and+ sourcefile
   and+ outfile in
-  Cmd_opt.cmd debug unsafe sourcefile outfile
+  Cmd_opt.cmd ~debug ~unsafe ~file:sourcefile ~outfile
 
 (* owi instrument *)
 
@@ -241,9 +227,13 @@ let instrument_info =
 let instrument_cmd =
   let+ debug
   and+ unsafe
-  and+ symbolic
+  and+ symbolic =
+    let doc =
+      "generate instrumented module that depends on symbolic execution"
+    in
+    Arg.(value & flag & info [ "symbolic" ] ~doc)
   and+ files in
-  Cmd_instrument.cmd debug unsafe symbolic files
+  Cmd_instrument.cmd ~debug ~unsafe ~symbolic ~files
 
 (* owi run *)
 
@@ -259,7 +249,7 @@ let run_cmd =
   and+ rac
   and+ optimize
   and+ files in
-  Cmd_run.cmd profiling debug unsafe rac optimize files
+  Cmd_run.cmd ~profiling ~debug ~unsafe ~rac ~optimize ~files
 
 (* owi validate *)
 
@@ -271,7 +261,7 @@ let validate_info =
 let validate_cmd =
   let+ debug
   and+ files in
-  Cmd_validate.cmd debug files
+  Cmd_validate.cmd ~debug ~files
 
 (* owi script *)
 
@@ -285,8 +275,11 @@ let script_cmd =
   and+ debug
   and+ optimize
   and+ files
-  and+ no_exhaustion in
-  Cmd_script.cmd profiling debug optimize files no_exhaustion
+  and+ no_exhaustion =
+    let doc = "no exhaustion tests" in
+    Arg.(value & flag & info [ "no-exhaustion" ] ~doc)
+  in
+  Cmd_script.cmd ~profiling ~debug ~optimize ~files ~no_exhaustion
 
 (* owi sym *)
 
@@ -311,9 +304,9 @@ let sym_cmd =
   and+ workspace
   and+ solver
   and+ files in
-  Cmd_sym.cmd profiling debug unsafe rac srac optimize workers
-    no_stop_at_failure no_values no_assert_failure_expression_printing
-    deterministic_result_order fail_mode workspace solver files
+  Cmd_sym.cmd ~profiling ~debug ~unsafe ~rac ~srac ~optimize ~workers
+    ~no_stop_at_failure ~no_values ~no_assert_failure_expression_printing
+    ~deterministic_result_order ~fail_mode ~workspace ~solver ~files
 
 (* owi conc *)
 
@@ -338,9 +331,9 @@ let conc_cmd =
   and+ workspace
   and+ solver
   and+ files in
-  Cmd_conc.cmd profiling debug unsafe rac srac optimize workers
-    no_stop_at_failure no_values no_assert_failure_expression_printing
-    deterministic_result_order fail_mode workspace solver files
+  Cmd_conc.cmd ~profiling ~debug ~unsafe ~rac ~srac ~optimize ~workers
+    ~no_stop_at_failure ~no_values ~no_assert_failure_expression_printing
+    ~deterministic_result_order ~fail_mode ~workspace ~solver ~files
 
 (* owi wasm2wat *)
 
@@ -353,9 +346,11 @@ let wasm2wat_info =
 
 let wasm2wat_cmd =
   let+ sourcefile
-  and+ emit_file
+  and+ emit_file =
+    let doc = "Emit (.wat) files from corresponding (.wasm) files." in
+    Arg.(value & flag & info [ "emit-file" ] ~doc)
   and+ outfile in
-  Cmd_wasm2wat.cmd sourcefile emit_file outfile
+  Cmd_wasm2wat.cmd ~file:sourcefile ~emit_file ~outfile
 
 (* owi wat2wasm *)
 
@@ -373,7 +368,7 @@ let wat2wasm_cmd =
   and+ optimize
   and+ outfile
   and+ sourcefile in
-  Cmd_wat2wasm.cmd profiling debug unsafe optimize outfile sourcefile
+  Cmd_wat2wasm.cmd ~profiling ~debug ~unsafe ~optimize ~outfile ~file:sourcefile
 
 (* owi *)
 
diff --git a/src/cmd/cmd_c.ml b/src/cmd/cmd_c.ml
index b63549c6..3c71a72d 100644
--- a/src/cmd/cmd_c.ml
+++ b/src/cmd/cmd_c.ml
@@ -183,10 +183,10 @@ let metadata ~workspace arch property files : unit Result.t =
   let* res = OS.File.with_oc fpath out_metadata { arch; property; files } in
   res
 
-let cmd debug arch property _testcomp workspace workers opt_lvl includes files
-  profiling unsafe optimize no_stop_at_failure no_values
-  no_assert_failure_expression_printing deterministic_result_order fail_mode
-  concolic eacsl solver : unit Result.t =
+let cmd ~debug ~arch ~property ~testcomp:_ ~workspace ~workers ~opt_lvl
+  ~includes ~files ~profiling ~unsafe ~optimize ~no_stop_at_failure ~no_values
+  ~no_assert_failure_expression_printing ~deterministic_result_order ~fail_mode
+  ~concolic ~eacsl ~solver : unit Result.t =
   let workspace = Fpath.v workspace in
   let includes = libc_location @ includes in
   let* (_exists : bool) = OS.Dir.create ~path:true workspace in
@@ -196,6 +196,6 @@ let cmd debug arch property _testcomp workspace workers opt_lvl includes files
   let workspace = Fpath.(workspace / "test-suite") in
   let files = [ modul ] in
   (if concolic then Cmd_conc.cmd else Cmd_sym.cmd)
-    profiling debug unsafe false false optimize workers no_stop_at_failure
-    no_values no_assert_failure_expression_printing deterministic_result_order
-    fail_mode workspace solver files
+    ~profiling ~debug ~unsafe ~rac:false ~srac:false ~optimize ~workers
+    ~no_stop_at_failure ~no_values ~no_assert_failure_expression_printing
+    ~deterministic_result_order ~fail_mode ~workspace ~solver ~files
diff --git a/src/cmd/cmd_c.mli b/src/cmd/cmd_c.mli
index bc860bb8..f3eff669 100644
--- a/src/cmd/cmd_c.mli
+++ b/src/cmd/cmd_c.mli
@@ -3,24 +3,24 @@
 (* Written by the Owi programmers *)
 
 val cmd :
-     bool
-  -> int
-  -> Fpath.t option
-  -> bool
-  -> string
-  -> int
-  -> string
-  -> Fpath.t list
-  -> Fpath.t list
-  -> bool
-  -> bool
-  -> bool
-  -> bool
-  -> bool
-  -> bool
-  -> bool
-  -> Cmd_sym.fail_mode
-  -> bool
-  -> bool
-  -> Smtml.Solver_dispatcher.solver_type
+     debug:bool
+  -> arch:int
+  -> property:Fpath.t option
+  -> testcomp:bool
+  -> workspace:string
+  -> workers:int
+  -> opt_lvl:string
+  -> includes:Fpath.t list
+  -> files:Fpath.t list
+  -> profiling:bool
+  -> unsafe:bool
+  -> optimize:bool
+  -> no_stop_at_failure:bool
+  -> no_values:bool
+  -> no_assert_failure_expression_printing:bool
+  -> deterministic_result_order:bool
+  -> fail_mode:Cmd_sym.fail_mode
+  -> concolic:bool
+  -> eacsl:bool
+  -> solver:Smtml.Solver_dispatcher.solver_type
   -> unit Result.t
diff --git a/src/cmd/cmd_conc.ml b/src/cmd/cmd_conc.ml
index 87a022ee..f8f08284 100644
--- a/src/cmd/cmd_conc.ml
+++ b/src/cmd/cmd_conc.ml
@@ -415,9 +415,10 @@ let run solver tree link_state modules_to_run =
    during evaluation (OS, syntax error, etc.), except for Trap and Assert,
    which are handled here. Most of the computations are done in the Result
    monad, hence the let*. *)
-let cmd profiling debug unsafe rac srac optimize _workers _no_stop_at_failure
-  no_values no_assert_failure_expression_printing _deterministic_result_order
-  _fail_mode (workspace : Fpath.t) solver files =
+let cmd ~profiling ~debug ~unsafe ~rac ~srac ~optimize ~workers:_
+  ~no_stop_at_failure:_ ~no_values ~no_assert_failure_expression_printing
+  ~deterministic_result_order:_ ~fail_mode:_ ~(workspace : Fpath.t) ~solver
+  ~files =
   if profiling then Log.profiling_on := true;
   if debug then Log.debug_on := true;
   (* deterministic_result_order implies no_stop_at_failure *)
diff --git a/src/cmd/cmd_conc.mli b/src/cmd/cmd_conc.mli
index 0a27652a..94c1a6b7 100644
--- a/src/cmd/cmd_conc.mli
+++ b/src/cmd/cmd_conc.mli
@@ -3,19 +3,19 @@
 (* Written by the Owi programmers *)
 
 val cmd :
-     bool
-  -> bool
-  -> bool
-  -> bool
-  -> bool
-  -> bool
-  -> int
-  -> bool
-  -> bool
-  -> bool
-  -> bool
-  -> Cmd_sym.fail_mode
-  -> Fpath.t
-  -> Smtml.Solver_dispatcher.solver_type
-  -> Fpath.t list
+     profiling:bool
+  -> debug:bool
+  -> unsafe:bool
+  -> rac:bool
+  -> srac:bool
+  -> optimize:bool
+  -> workers:int
+  -> no_stop_at_failure:bool
+  -> no_values:bool
+  -> no_assert_failure_expression_printing:bool
+  -> deterministic_result_order:bool
+  -> fail_mode:Cmd_sym.fail_mode
+  -> workspace:Fpath.t
+  -> solver:Smtml.Solver_dispatcher.solver_type
+  -> files:Fpath.t list
   -> unit Result.t
diff --git a/src/cmd/cmd_fmt.ml b/src/cmd/cmd_fmt.ml
index 9a846026..93814aae 100644
--- a/src/cmd/cmd_fmt.ml
+++ b/src/cmd/cmd_fmt.ml
@@ -20,4 +20,4 @@ let cmd_one inplace file =
   if inplace then Bos.OS.File.writef file "%a@\n" pp ()
   else Ok (Fmt.pr "%a@\n" pp ())
 
-let cmd inplace files = list_iter (cmd_one inplace) files
+let cmd ~inplace ~files = list_iter (cmd_one inplace) files
diff --git a/src/cmd/cmd_fmt.mli b/src/cmd/cmd_fmt.mli
index 433a9547..483add9a 100644
--- a/src/cmd/cmd_fmt.mli
+++ b/src/cmd/cmd_fmt.mli
@@ -2,4 +2,4 @@
 (* Copyright © 2021-2024 OCamlPro *)
 (* Written by the Owi programmers *)
 
-val cmd : bool -> Fpath.t list -> unit Result.t
+val cmd : inplace:bool -> files:Fpath.t list -> unit Result.t
diff --git a/src/cmd/cmd_instrument.ml b/src/cmd/cmd_instrument.ml
index 26f19eb2..e8d27d3b 100644
--- a/src/cmd/cmd_instrument.ml
+++ b/src/cmd/cmd_instrument.ml
@@ -25,6 +25,6 @@ let cmd_one unsafe symbolic file =
     Bos.OS.File.writef filename "%a" Text.pp_modul instrumented_text_modul
   | ext -> Error (`Unsupported_file_extension ext)
 
-let cmd debug unsafe symbolic files =
+let cmd ~debug ~unsafe ~symbolic ~files =
   if debug then Log.debug_on := true;
   list_iter (cmd_one unsafe symbolic) files
diff --git a/src/cmd/cmd_instrument.mli b/src/cmd/cmd_instrument.mli
index 96aaaceb..70b4138f 100644
--- a/src/cmd/cmd_instrument.mli
+++ b/src/cmd/cmd_instrument.mli
@@ -2,4 +2,9 @@
 (* Copyright © 2021-2024 OCamlPro *)
 (* Written by the Owi programmers *)
 
-val cmd : bool -> bool -> bool -> Fpath.t list -> unit Result.t
+val cmd :
+     debug:bool
+  -> unsafe:bool
+  -> symbolic:bool
+  -> files:Fpath.t list
+  -> unit Result.t
diff --git a/src/cmd/cmd_opt.ml b/src/cmd/cmd_opt.ml
index df5ea111..bc3dc53a 100644
--- a/src/cmd/cmd_opt.ml
+++ b/src/cmd/cmd_opt.ml
@@ -15,6 +15,6 @@ let print_or_emit ~unsafe file outfile =
   | Some name -> Bos.OS.File.writef name "%a@\n" Text.pp_modul m
   | None -> Ok (Fmt.pr "%a@\n" Text.pp_modul m)
 
-let cmd debug unsafe file outfile =
+let cmd ~debug ~unsafe ~file ~outfile =
   if debug then Log.debug_on := true;
   print_or_emit ~unsafe file outfile
diff --git a/src/cmd/cmd_opt.mli b/src/cmd/cmd_opt.mli
index 74ce0a34..965f9cb4 100644
--- a/src/cmd/cmd_opt.mli
+++ b/src/cmd/cmd_opt.mli
@@ -2,4 +2,9 @@
 (* Copyright © 2021-2024 OCamlPro *)
 (* Written by the Owi programmers *)
 
-val cmd : bool -> bool -> Fpath.t -> Fpath.t option -> unit Result.t
+val cmd :
+     debug:bool
+  -> unsafe:bool
+  -> file:Fpath.t
+  -> outfile:Fpath.t option
+  -> unit Result.t
diff --git a/src/cmd/cmd_run.ml b/src/cmd/cmd_run.ml
index d3e949f1..5bbc495a 100644
--- a/src/cmd/cmd_run.ml
+++ b/src/cmd/cmd_run.ml
@@ -27,7 +27,7 @@ let run_file ~unsafe ~rac ~optimize filename =
   in
   ()
 
-let cmd profiling debug unsafe rac optimize files =
+let cmd ~profiling ~debug ~unsafe ~rac ~optimize ~files =
   if profiling then Log.profiling_on := true;
   if debug then Log.debug_on := true;
   list_iter (run_file ~unsafe ~rac ~optimize) files
diff --git a/src/cmd/cmd_run.mli b/src/cmd/cmd_run.mli
index 63aec0ac..5d8bd595 100644
--- a/src/cmd/cmd_run.mli
+++ b/src/cmd/cmd_run.mli
@@ -2,4 +2,11 @@
 (* Copyright © 2021-2024 OCamlPro *)
 (* Written by the Owi programmers *)
 
-val cmd : bool -> bool -> bool -> bool -> bool -> Fpath.t list -> unit Result.t
+val cmd :
+     profiling:bool
+  -> debug:bool
+  -> unsafe:bool
+  -> rac:bool
+  -> optimize:bool
+  -> files:Fpath.t list
+  -> unit Result.t
diff --git a/src/cmd/cmd_script.ml b/src/cmd/cmd_script.ml
index 30048a92..3878cb3a 100644
--- a/src/cmd/cmd_script.ml
+++ b/src/cmd/cmd_script.ml
@@ -8,7 +8,7 @@ let run_file exec filename =
   let* script = Parse.Text.Script.from_file filename in
   exec script
 
-let cmd profiling debug optimize files no_exhaustion =
+let cmd ~profiling ~debug ~optimize ~files ~no_exhaustion =
   let exec = Script.exec ~no_exhaustion ~optimize in
   if profiling then Log.profiling_on := true;
   if debug then Log.debug_on := true;
diff --git a/src/cmd/cmd_script.mli b/src/cmd/cmd_script.mli
index fe2dd105..d5850ede 100644
--- a/src/cmd/cmd_script.mli
+++ b/src/cmd/cmd_script.mli
@@ -2,4 +2,10 @@
 (* Copyright © 2021-2024 OCamlPro *)
 (* Written by the Owi programmers *)
 
-val cmd : bool -> bool -> bool -> Fpath.t list -> bool -> unit Result.t
+val cmd :
+     profiling:bool
+  -> debug:bool
+  -> optimize:bool
+  -> files:Fpath.t list
+  -> no_exhaustion:bool
+  -> unit Result.t
diff --git a/src/cmd/cmd_sym.ml b/src/cmd/cmd_sym.ml
index f06f2665..fa489f92 100644
--- a/src/cmd/cmd_sym.ml
+++ b/src/cmd/cmd_sym.ml
@@ -46,9 +46,9 @@ let run_file ~unsafe ~rac ~srac ~optimize pc filename =
    during evaluation (OS, syntax error, etc.), except for Trap and Assert,
    which are handled here. Most of the computations are done in the Result
    monad, hence the let*. *)
-let cmd profiling debug unsafe rac srac optimize workers no_stop_at_failure
-  no_values no_assert_failure_expression_printing deterministic_result_order
-  fail_mode (workspace : Fpath.t) solver files =
+let cmd ~profiling ~debug ~unsafe ~rac ~srac ~optimize ~workers
+  ~no_stop_at_failure ~no_values ~no_assert_failure_expression_printing
+  ~deterministic_result_order ~fail_mode ~workspace ~solver ~files =
   if profiling then Log.profiling_on := true;
   if debug then Log.debug_on := true;
   (* deterministic_result_order implies no_stop_at_failure *)
diff --git a/src/cmd/cmd_sym.mli b/src/cmd/cmd_sym.mli
index cef78983..005960bf 100644
--- a/src/cmd/cmd_sym.mli
+++ b/src/cmd/cmd_sym.mli
@@ -9,19 +9,19 @@ type fail_mode =
   ]
 
 val cmd :
-     bool
-  -> bool
-  -> bool
-  -> bool
-  -> bool
-  -> bool
-  -> int
-  -> bool
-  -> bool
-  -> bool
-  -> bool
-  -> fail_mode
-  -> Fpath.t
-  -> Smtml.Solver_dispatcher.solver_type
-  -> Fpath.t list
+     profiling:bool
+  -> debug:bool
+  -> unsafe:bool
+  -> rac:bool
+  -> srac:bool
+  -> optimize:bool
+  -> workers:int
+  -> no_stop_at_failure:bool
+  -> no_values:bool
+  -> no_assert_failure_expression_printing:bool
+  -> deterministic_result_order:bool
+  -> fail_mode:fail_mode
+  -> workspace:Fpath.t
+  -> solver:Smtml.Solver_dispatcher.solver_type
+  -> files:Fpath.t list
   -> unit Result.t
diff --git a/src/cmd/cmd_validate.ml b/src/cmd/cmd_validate.ml
index f5c12a61..17474af5 100644
--- a/src/cmd/cmd_validate.ml
+++ b/src/cmd/cmd_validate.ml
@@ -11,6 +11,6 @@ let validate filename =
   in
   ()
 
-let cmd debug files =
+let cmd ~debug ~files =
   if debug then Log.debug_on := true;
   list_iter validate files
diff --git a/src/cmd/cmd_validate.mli b/src/cmd/cmd_validate.mli
index 433a9547..f8db7978 100644
--- a/src/cmd/cmd_validate.mli
+++ b/src/cmd/cmd_validate.mli
@@ -2,4 +2,4 @@
 (* Copyright © 2021-2024 OCamlPro *)
 (* Written by the Owi programmers *)
 
-val cmd : bool -> Fpath.t list -> unit Result.t
+val cmd : debug:bool -> files:Fpath.t list -> unit Result.t
diff --git a/src/cmd/cmd_wasm2wat.ml b/src/cmd/cmd_wasm2wat.ml
index 379eedc0..4407f19e 100644
--- a/src/cmd/cmd_wasm2wat.ml
+++ b/src/cmd/cmd_wasm2wat.ml
@@ -5,13 +5,12 @@
 open Syntax
 
 (** Utility function to handle writing to a file or printing to stdout *)
-let cmd_one emitfile outfile file =
+let cmd ~file ~emit_file ~outfile =
   let ext = Fpath.get_ext file in
-  let _dir, wat_file = Fpath.split_base file in
-  let wat_file = Fpath.set_ext "wat" wat_file in
-
   match ext with
   | ".wasm" ->
+    let _dir, wat_file = Fpath.split_base file in
+    let wat_file = Fpath.set_ext "wat" wat_file in
     let* m = Parse.Binary.Module.from_file file in
     let m = Binary_to_text.modul m in
     let outname, output =
@@ -21,9 +20,7 @@ let cmd_one emitfile outfile file =
         | None -> (wat_file, false)
       end
     in
-    if emitfile || output then
+    if emit_file || output then
       Bos.OS.File.writef outname "%a@\n" Text.pp_modul m
     else Ok (Fmt.pr "%a@\n" Text.pp_modul m)
   | ext -> Error (`Unsupported_file_extension ext)
-
-let cmd file emitfile outfile = cmd_one emitfile outfile file
diff --git a/src/cmd/cmd_wasm2wat.mli b/src/cmd/cmd_wasm2wat.mli
index 220d9b19..b8b0f96f 100644
--- a/src/cmd/cmd_wasm2wat.mli
+++ b/src/cmd/cmd_wasm2wat.mli
@@ -2,4 +2,5 @@
 (* Copyright © 2021-2024 OCamlPro *)
 (* Written by the Owi programmers *)
 
-val cmd : Fpath.t -> bool -> Fpath.t option -> unit Result.t
+val cmd :
+  file:Fpath.t -> emit_file:bool -> outfile:Fpath.t option -> unit Result.t
diff --git a/src/cmd/cmd_wat2wasm.ml b/src/cmd/cmd_wat2wasm.ml
index e820eadb..4b9c65c5 100644
--- a/src/cmd/cmd_wat2wasm.ml
+++ b/src/cmd/cmd_wat2wasm.ml
@@ -12,7 +12,7 @@ let cmd_one ~unsafe ~optimize outfile file =
     Binary_encoder.convert outfile file ~unsafe ~optimize modul
   | ext -> Error (`Unsupported_file_extension ext)
 
-let cmd profiling debug unsafe optimize outfile file =
+let cmd ~profiling ~debug ~unsafe ~optimize ~outfile ~file =
   if profiling then Log.profiling_on := true;
   if debug then Log.debug_on := true;
   cmd_one ~unsafe ~optimize outfile file
diff --git a/src/cmd/cmd_wat2wasm.mli b/src/cmd/cmd_wat2wasm.mli
index 43a9d5c2..a491c20e 100644
--- a/src/cmd/cmd_wat2wasm.mli
+++ b/src/cmd/cmd_wat2wasm.mli
@@ -3,4 +3,10 @@
 (* Written by the Owi programmers *)
 
 val cmd :
-  bool -> bool -> bool -> bool -> Fpath.t option -> Fpath.t -> unit Result.t
+     profiling:bool
+  -> debug:bool
+  -> unsafe:bool
+  -> optimize:bool
+  -> outfile:Fpath.t option
+  -> file:Fpath.t
+  -> unit Result.t