diff --git a/README.md b/README.md
index 8d3b5bd3..a7eae8d8 100644
--- a/README.md
+++ b/README.md
@@ -180,6 +180,11 @@ cd everything-claude-code
 npm install        # or: pnpm install | yarn install | bun install
 
 # macOS/Linux
+
+# Recommended: install everything (full profile)
+./install.sh --profile full
+
+# Or install for specific languages only
 ./install.sh typescript    # or python or golang or swift or php
 # ./install.sh typescript python golang swift php
 # ./install.sh --target cursor typescript
@@ -188,6 +193,11 @@ npm install        # or: pnpm install | yarn install | bun install
 
 ```powershell
 # Windows PowerShell
+
+# Recommended: install everything (full profile)
+.\install.ps1 --profile full
+
+# Or install for specific languages only
 .\install.ps1 typescript   # or python or golang or swift or php
 # .\install.ps1 typescript python golang swift php
 # .\install.ps1 --target cursor typescript
diff --git a/scripts/install-apply.js b/scripts/install-apply.js
index 6eda0845..e082c3bb 100644
--- a/scripts/install-apply.js
+++ b/scripts/install-apply.js
@@ -17,10 +17,10 @@ const {
   parseInstallArgs,
 } = require('./lib/install/request');
 
-function showHelp(exitCode = 0) {
+function getHelpText() {
   const languages = listLegacyCompatibilityLanguages();
 
-  console.log(`
+  return `
 Usage: install.sh [--target <${LEGACY_INSTALL_TARGETS.join('|')}>] [--dry-run] [--json] <language> [<language> ...]
        install.sh [--target <${SUPPORTED_INSTALL_TARGETS.join('|')}>] [--dry-run] [--json] --profile <name> [--with <component>]... [--without <component>]...
        install.sh [--target <${SUPPORTED_INSTALL_TARGETS.join('|')}>] [--dry-run] [--json] --modules <id,id,...> [--with <component>]... [--without <component>]...
@@ -44,8 +44,11 @@ Options:
 
 Available languages:
 ${languages.map(language => `  - ${language}`).join('\n')}
-`);
+`;
+}
 
+function showHelp(exitCode = 0) {
+  console.log(getHelpText());
   process.exit(exitCode);
 }
 
@@ -139,7 +142,7 @@ function main() {
       printHumanPlan(result, false);
     }
   } catch (error) {
-    console.error(`Error: ${error.message}`);
+    process.stderr.write(`Error: ${error.message}${getHelpText()}`);
     process.exit(1);
   }
 }