diff --git a/README.md b/README.md
index b3f50d6..de08bb6 100644
--- a/README.md
+++ b/README.md
@@ -11,8 +11,6 @@ brew tap satococoa/tap
 brew install satococoa/tap/git-worktreeinclude
 ```
 
-Homebrew installs shell completions for `bash`, `zsh`, and `fish`.
-
 ### Build
 
 ```sh
@@ -117,30 +115,6 @@ Prints the recommended `post-checkout` hook snippet.
 git-worktreeinclude hook print post-checkout
 ```
 
-### `git-worktreeinclude completion <bash|zsh|fish|pwsh>`
-
-Outputs a shell completion script generated by the CLI framework.
-
-```sh
-git-worktreeinclude completion zsh
-```
-
-Examples:
-
-```sh
-# bash
-source <(git-worktreeinclude completion bash)
-
-# zsh
-source <(git-worktreeinclude completion zsh)
-
-# fish
-git-worktreeinclude completion fish > ~/.config/fish/completions/git-worktreeinclude.fish
-
-# pwsh
-git-worktreeinclude completion pwsh | Out-String | Invoke-Expression
-```
-
 ## JSON output
 
 `apply --json` emits a single JSON object to stdout.
diff --git a/internal/cli/cli.go b/internal/cli/cli.go
index 3cabd52..0b796ae 100644
--- a/internal/cli/cli.go
+++ b/internal/cli/cli.go
@@ -49,14 +49,10 @@ func (a *App) Run(args []string) int {
 
 func (a *App) newRootCommand() *ucli.Command {
 	return &ucli.Command{
-		Name:                  "git-worktreeinclude",
-		Usage:                 "apply ignored files listed in .worktreeinclude between Git worktrees",
-		Writer:                a.stdout,
-		ErrWriter:             a.stderr,
-		EnableShellCompletion: true,
-		ConfigureShellCompletionCommand: func(cmd *ucli.Command) {
-			cmd.Hidden = false
-		},
+		Name:           "git-worktreeinclude",
+		Usage:          "apply ignored files listed in .worktreeinclude between Git worktrees",
+		Writer:         a.stdout,
+		ErrWriter:      a.stderr,
 		OnUsageError:   a.onUsageError,
 		ExitErrHandler: a.handleExitError,
 		Commands: []*ucli.Command{
diff --git a/internal/cli/cli_integration_test.go b/internal/cli/cli_integration_test.go
index e7565dd..0c7d195 100644
--- a/internal/cli/cli_integration_test.go
+++ b/internal/cli/cli_integration_test.go
@@ -430,19 +430,6 @@ func TestUsageErrorWritesHelpToStderr(t *testing.T) {
 	}
 }
 
-func TestCompletionCommand(t *testing.T) {
-	tmpDir := t.TempDir()
-	for _, shell := range []string{"bash", "zsh", "fish", "pwsh"} {
-		stdout, stderr, code := runCmd(t, tmpDir, nil, testBinary, "completion", shell)
-		if code != 0 {
-			t.Fatalf("completion %s exit code=%d stderr=%s", shell, code, stderr)
-		}
-		if strings.TrimSpace(stdout) == "" {
-			t.Fatalf("completion %s should not be empty", shell)
-		}
-	}
-}
-
 func TestHookPrintUsageErrorShowsHelpOnStderr(t *testing.T) {
 	fx := setupFixture(t)