diff --git a/pkg/util/shellutil/shellintegration/bash_bashrc.sh b/pkg/util/shellutil/shellintegration/bash_bashrc.sh
index b9c68e6e62..8ec2dc49fb 100644
--- a/pkg/util/shellutil/shellintegration/bash_bashrc.sh
+++ b/pkg/util/shellutil/shellintegration/bash_bashrc.sh
@@ -75,7 +75,7 @@ _waveterm_si_urlencode() {
 _waveterm_si_osc7() {
     _waveterm_si_blocked && return
     local encoded_pwd=$(_waveterm_si_urlencode "$PWD")
-    printf '\033]7;file://%s%s\007' "$HOSTNAME" "$encoded_pwd"
+    printf '\033]7;file://localhost%s\007' "$encoded_pwd"
 }
 
 _waveterm_si_precmd() {
diff --git a/pkg/util/shellutil/shellintegration/fish_wavefish.sh b/pkg/util/shellutil/shellintegration/fish_wavefish.sh
index d6aa9d5000..f896f015d3 100644
--- a/pkg/util/shellutil/shellintegration/fish_wavefish.sh
+++ b/pkg/util/shellutil/shellintegration/fish_wavefish.sh
@@ -21,7 +21,7 @@ function _waveterm_si_osc7
     _waveterm_si_blocked; and return
     # Use fish-native URL encoding
     set -l encoded_pwd (string escape --style=url -- "$PWD")
-    printf '\033]7;file://%s%s\007' $hostname $encoded_pwd
+    printf '\033]7;file://localhost%s\007' $encoded_pwd
 end
 
 function _waveterm_si_prompt --on-event fish_prompt
diff --git a/pkg/util/shellutil/shellintegration/pwsh_wavepwsh.sh b/pkg/util/shellutil/shellintegration/pwsh_wavepwsh.sh
index b24288e305..cc002b57a9 100644
--- a/pkg/util/shellutil/shellintegration/pwsh_wavepwsh.sh
+++ b/pkg/util/shellutil/shellintegration/pwsh_wavepwsh.sh
@@ -27,17 +27,11 @@ function Global:_waveterm_si_blocked {
 function Global:_waveterm_si_osc7 {
     if (_waveterm_si_blocked) { return }
     
-    # Get hostname (allow empty for file:/// format)
-    $hostname = $env:COMPUTERNAME
-    if (-not $hostname) {
-        $hostname = $env:HOSTNAME
-    }
-    
     # Percent-encode the raw path as-is (handles UNC, drive letters, etc.)
     $encoded_pwd = [System.Uri]::EscapeDataString($PWD.Path)
     
     # OSC 7 - current directory
-    Write-Host -NoNewline "`e]7;file://$hostname/$encoded_pwd`a"
+    Write-Host -NoNewline "`e]7;file://localhost/$encoded_pwd`a"
 }
 
 function Global:_waveterm_si_prompt {
diff --git a/pkg/util/shellutil/shellintegration/zsh_zshrc.sh b/pkg/util/shellutil/shellintegration/zsh_zshrc.sh
index 5df358bb1c..f24abee181 100644
--- a/pkg/util/shellutil/shellintegration/zsh_zshrc.sh
+++ b/pkg/util/shellutil/shellintegration/zsh_zshrc.sh
@@ -31,14 +31,14 @@ _waveterm_si_urlencode() {
   else
     local s="$1"
     # Escape % first
-    s=${s//%/%25}
+    s=${s//\%/%25}
     # Common reserved characters in file paths
-    s=${s// /%20}
-    s=${s//#/%23}
+    s=${s//\ /%20}
+    s=${s//\#/%23}
     s=${s//\?/%3F}
-    s=${s//&/%26}
-    s=${s//;/%3B}
-    s=${s//+/%2B}
+    s=${s//\&/%26}
+    s=${s//\;/%3B}
+    s=${s//\+/%2B}
     printf '%s' "$s"
   fi
 }
@@ -46,7 +46,7 @@ _waveterm_si_urlencode() {
 _waveterm_si_osc7() {
   _waveterm_si_blocked && return
   local encoded_pwd=$(_waveterm_si_urlencode "$PWD")
-  printf '\033]7;file://%s%s\007' "$HOST" "$encoded_pwd"  # OSC 7 - current directory
+  printf '\033]7;file://localhost%s\007' "$encoded_pwd"  # OSC 7 - current directory
 }
 
 _waveterm_si_precmd() {