fix(cli): suppress Vite+ header in non-TTY and git hook contexts

The banner was printing from every `vp` invocation, cluttering captured
output (lefthook/husky, `execSync`, CI pipes, pagers) and the git commit
flow when a shell pre-commit hook runs `vp check --fix` — in the hook
the colour detection is unreliable, so the banner also rendered in a
degraded style.

Banner emission now gates on two signals at every call site:

- `stdout.is_terminal()` — catches piped/redirected contexts.
- `GIT_INDEX_FILE` env var — catches direct shell hooks that inherit
  the terminal for stdout. Git sets this for pre-commit, commit-msg,
  and prepare-commit-msg, which is where `vp check --fix` typically
  runs.

Centralised behind `vite_shared::header::print_header()` on the Rust
side and a new `printHeader()` helper in `packages/cli/src/utils/
terminal.ts` on the Node CLI side. The interactive `prompts.intro()` in
`vp create` and the interactive top-level command picker are left
alone — they only run when genuinely interactive.

Snap fixtures regenerated to reflect the removed banner lines.

Author: fengmk2

crates/vite_global_cli/src/cli.rs

@@ -2102,8 +2102,7 @@ fn print_runtime_header(show_header: bool) {
     if !show_header {
         return;
     }
-    println!("{}", vite_shared::header::vite_plus_header());
-    println!();
+    vite_shared::header::print_header();
 }
 
 /// Build a clap Command with custom help formatting matching the JS CLI output.
@@ -2120,7 +2119,7 @@ pub fn command_with_help_with_options(render_options: RenderOptions) -> clap::Co
 fn apply_custom_help(cmd: clap::Command, render_options: RenderOptions) -> clap::Command {
     let after_help = help::render_help_doc(&help::top_level_help_doc());
     let options_heading = help::render_heading("Options");
-    let header = if render_options.show_header {
+    let header = if render_options.show_header && vite_shared::header::should_print_header() {
         vite_shared::header::vite_plus_header()
     } else {
         String::new()

crates/vite_global_cli/src/commands/env/mod.rs

@@ -32,8 +32,7 @@ use crate::{
 };
 
 fn print_env_header() {
-    println!("{}", vite_shared::header::vite_plus_header());
-    println!();
+    vite_shared::header::print_header();
 }
 
 fn should_print_env_header(subcommand: &EnvSubcommands) -> bool {
@@ -140,8 +139,7 @@ pub async fn execute(cwd: AbsolutePathBuf, args: EnvArgs) -> Result<ExitStatus,
     if !crate::help::print_unified_clap_help_for_path(&["env"]) {
         // Fallback to clap's built-in help printer if unified rendering fails.
         use clap::CommandFactory;
-        println!("{}", vite_shared::header::vite_plus_header());
-        println!();
+        vite_shared::header::print_header();
         crate::cli::Args::command()
             .find_subcommand("env")
             .unwrap()

crates/vite_global_cli/src/commands/version.rs

@@ -161,8 +161,7 @@ fn detect_system_node_version() -> Option<String> {
 
 /// Execute the `--version` command.
 pub async fn execute(cwd: AbsolutePathBuf) -> Result<ExitStatus, Error> {
-    println!("{}", vite_shared::header::vite_plus_header());
-    println!();
+    vite_shared::header::print_header();
 
     println!("vp v{}", env!("CARGO_PKG_VERSION"));
     println!();

crates/vite_global_cli/src/help.rs

@@ -993,8 +993,7 @@ pub fn maybe_print_unified_clap_subcommand_help(argv: &[String]) -> bool {
     }
 
     if command_path.len() == 1 && command_path[0] == "env" {
-        println!("{}", vite_shared::header::vite_plus_header());
-        println!();
+        vite_shared::header::print_header();
         println!("{}", render_help_doc(&env_help_doc()));
         return true;
     }
@@ -1024,17 +1023,15 @@ pub fn maybe_print_unified_delegate_help(
     };
 
     if show_header {
-        println!("{}", vite_shared::header::vite_plus_header());
-        println!();
+        vite_shared::header::print_header();
     }
     println!("{}", render_help_doc(&doc));
     true
 }
 
 pub fn print_unified_clap_help_for_path(command_path: &[&str]) -> bool {
     if command_path == ["env"] {
-        println!("{}", vite_shared::header::vite_plus_header());
-        println!();
+        vite_shared::header::print_header();
         println!("{}", render_help_doc(&env_help_doc()));
         return true;
     }
@@ -1057,8 +1054,7 @@ pub fn print_unified_clap_help_for_path(command_path: &[&str]) -> bool {
         ..doc
     };
 
-    println!("{}", vite_shared::header::vite_plus_header());
-    println!();
+    vite_shared::header::print_header();
     println!("{}", render_owned_help_doc(&doc));
     true
 }

crates/vite_global_cli/src/main.rs

@@ -116,8 +116,7 @@ fn extract_invalid_subcommand_details(error: &clap::Error) -> Option<InvalidSubc
 }
 
 fn print_invalid_subcommand_error(details: &InvalidSubcommandDetails) {
-    println!("{}", vite_shared::header::vite_plus_header());
-    println!();
+    vite_shared::header::print_header();
 
     let highlighted_subcommand = details.invalid_subcommand.bright_blue().to_string();
     output::error(&format!("Command '{highlighted_subcommand}' not found"));
@@ -237,8 +236,7 @@ fn print_unknown_argument_error(error: &clap::Error) -> bool {
         return false;
     };
 
-    println!("{}", vite_shared::header::vite_plus_header());
-    println!();
+    vite_shared::header::print_header();
 
     let highlighted_argument = invalid_argument.bright_blue().to_string();
     output::error(&format!("Unexpected argument '{highlighted_argument}'"));

crates/vite_shared/src/header.rs

@@ -536,6 +536,36 @@ pub fn vite_plus_header() -> String {
     render_header_variant(header_colors.blue, &header_colors.suffix_gradient, true, true)
 }
 
+/// Whether the Vite+ banner should be emitted in the current environment.
+///
+/// The banner is cosmetic and assumes an interactive terminal; it's
+/// suppressed when:
+/// - stdout is piped or redirected (lefthook/husky, `execSync`, CI, pagers).
+/// - a git commit-flow hook is running. Direct shell hooks inherit the
+///   terminal for stdout, so the TTY check alone doesn't catch them; git
+///   sets `GIT_INDEX_FILE` for pre-commit / commit-msg / prepare-commit-msg,
+///   which is where `vp check --fix` typically runs.
+#[must_use]
+pub fn should_print_header() -> bool {
+    if !std::io::stdout().is_terminal() {
+        return false;
+    }
+    if std::env::var_os("GIT_INDEX_FILE").is_some() {
+        return false;
+    }
+    true
+}
+
+/// Emit the Vite+ banner (header line + trailing blank line) to stdout, but
+/// only when the environment is interactive. No-op otherwise.
+pub fn print_header() {
+    if !should_print_header() {
+        return;
+    }
+    println!("{}", vite_plus_header());
+    println!();
+}
+
 #[cfg(all(test, unix))]
 mod tests {
     use std::io::{BufReader, Cursor};

packages/cli/binding/src/cli/help.rs

@@ -169,14 +169,16 @@ fn print_unknown_argument_error(error: &clap::Error) -> bool {
 }
 
 pub(super) fn print_help() {
-    let header = vite_shared::header::vite_plus_header();
+    let header = if vite_shared::header::should_print_header() {
+        format!("{}\n\n", vite_shared::header::vite_plus_header())
+    } else {
+        String::new()
+    };
     let bold = "\x1b[1m";
     let bold_underline = "\x1b[1;4m";
     let reset = "\x1b[0m";
     println!(
-        "{header}
-
-{bold_underline}Usage:{reset} {bold}vp{reset} <COMMAND>
+        "{header}{bold_underline}Usage:{reset} {bold}vp{reset} <COMMAND>
 
 {bold_underline}Core Commands:{reset}
   {bold}dev{reset}            Run the development server

packages/cli/snap-tests-global/cli-helper-message/snap.txt

@@ -1,5 +1,4 @@
 > vp -h # show help message
-VITE+ - The Unified Toolchain for the Web
 
 Usage: vp [COMMAND]
 
@@ -55,8 +54,6 @@ Options:
   -h, --help     Print help
 
 > vp -V # show version
-VITE+ - The Unified Toolchain for the Web
-
 vp v<semver>
 
 Local vite-plus:
@@ -76,8 +73,6 @@ Environment:
   Node.js          v<semver>
 
 > vp install -h # show install help message
-VITE+ - The Unified Toolchain for the Web
-
 Usage: vp install [OPTIONS] [PACKAGES]... [-- <PASS_THROUGH_ARGS>...]
 
 Install all dependencies, or add packages if package names are provided
@@ -116,8 +111,6 @@ Documentation: https://viteplus.dev/guide/install
 
 
 > vp add -h # show add help message
-VITE+ - The Unified Toolchain for the Web
-
 Usage: vp add [OPTIONS] <PACKAGES>... [-- <PASS_THROUGH_ARGS>...]
 
 Add packages to dependencies
@@ -146,8 +139,6 @@ Documentation: https://viteplus.dev/guide/install
 
 
 > vp remove -h # show remove help message
-VITE+ - The Unified Toolchain for the Web
-
 Usage: vp remove [OPTIONS] <PACKAGES>... [-- <PASS_THROUGH_ARGS>...]
 
 Remove packages from dependencies
@@ -171,8 +162,6 @@ Documentation: https://viteplus.dev/guide/install
 
 
 > vp update -h # show update help message
-VITE+ - The Unified Toolchain for the Web
-
 Usage: vp update [OPTIONS] [PACKAGES]... [-- <PASS_THROUGH_ARGS>...]
 
 Update packages to their latest versions
@@ -199,8 +188,6 @@ Documentation: https://viteplus.dev/guide/install
 
 
 > vp link -h # show link help message
-VITE+ - The Unified Toolchain for the Web
-
 Usage: vp link [PACKAGE|DIR] [ARGS]...
 
 Link packages for local development
@@ -216,8 +203,6 @@ Documentation: https://viteplus.dev/guide/install
 
 
 > vp unlink -h # show unlink help message
-VITE+ - The Unified Toolchain for the Web
-
 Usage: vp unlink [OPTIONS] [PACKAGE|DIR] [ARGS]...
 
 Unlink packages
@@ -234,8 +219,6 @@ Documentation: https://viteplus.dev/guide/install
 
 
 > vp dedupe -h # show dedupe help message
-VITE+ - The Unified Toolchain for the Web
-
 Usage: vp dedupe [OPTIONS] [-- <PASS_THROUGH_ARGS>...]
 
 Deduplicate dependencies
@@ -251,8 +234,6 @@ Documentation: https://viteplus.dev/guide/install
 
 
 > vp outdated -h # show outdated help message
-VITE+ - The Unified Toolchain for the Web
-
 Usage: vp outdated [OPTIONS] [PACKAGES]... [-- <PASS_THROUGH_ARGS>...]
 
 Check for outdated packages
@@ -279,8 +260,6 @@ Documentation: https://viteplus.dev/guide/install
 
 
 > vp why -h # show why help message
-VITE+ - The Unified Toolchain for the Web
-
 Usage: vp why [OPTIONS] <PACKAGES>... [-- <PASS_THROUGH_ARGS>...]
 
 Show why a package is installed
@@ -309,8 +288,6 @@ Documentation: https://viteplus.dev/guide/install
 
 
 > vp info -h # show info help message
-VITE+ - The Unified Toolchain for the Web
-
 Usage: vp info [OPTIONS] <PACKAGE> [FIELD] [-- <PASS_THROUGH_ARGS>...]
 
 View package information from the registry
@@ -328,8 +305,6 @@ Documentation: https://viteplus.dev/guide/install
 
 
 > vp pm -h # show pm help message
-VITE+ - The Unified Toolchain for the Web
-
 Usage: vp pm <COMMAND>
 
 Forward a command to the package manager
@@ -362,8 +337,6 @@ Documentation: https://viteplus.dev/guide/install
 
 
 > vp env # show env help message
-VITE+ - The Unified Toolchain for the Web
-
 Usage: vp env [COMMAND]
 
 Manage Node.js versions
@@ -423,8 +396,6 @@ Documentation: https://viteplus.dev/guide/env
 
 
 > vp upgrade -h # show upgrade help message
-VITE+ - The Unified Toolchain for the Web
-
 Usage: vp upgrade [OPTIONS] [VERSION]
 
 Update vp itself to the latest version

packages/cli/snap-tests-global/command-add-bun/snap.txt

@@ -1,6 +1,4 @@
 > vp add --help # should show help
-VITE+ - The Unified Toolchain for the Web
-
 Usage: vp add [OPTIONS] <PACKAGES>... [-- <PASS_THROUGH_ARGS>...]
 
 Add packages to dependencies
@@ -71,8 +69,6 @@ installed test-vite-plus-install@<semver>
 }
 
 > vp install test-vite-plus-package@1.0.0 --save-peer && cat package.json # should install package alias for add
-VITE+ - The Unified Toolchain for the Web
-
 bun add v<semver> (af24e281)
 
 installed test-vite-plus-package@<semver>

packages/cli/snap-tests-global/command-add-npm10-with-workspace/snap.txt

@@ -180,8 +180,6 @@ up to date in <variable>ms
 }
 
 > vp install test-vite-plus-package@1.0.0 --filter "*" --workspace-root -- --no-audit && cat package.json packages/app/package.json packages/utils/package.json # should install packages alias for add command
-VITE+ - The Unified Toolchain for the Web
-
 
 added 1 package in <variable>ms
 {