From 06523d8c1e23acbd82c62964f0b7959a75dfdb0c Mon Sep 17 00:00:00 2001
From: Nikesh Parajuli <47485043+nikeshparajuli@users.noreply.github.com>
Date: Tue, 25 Nov 2025 00:39:56 -0500
Subject: [PATCH] feat: add platform-specific process attributes support (#411)

Fixes issues on Windows showing new windows for every process llama-swap spawns.
---
 proxy/process.go         |  2 ++
 proxy/process_unix.go    | 12 ++++++++++++
 proxy/process_windows.go | 16 ++++++++++++++++
 3 files changed, 30 insertions(+)
 create mode 100644 proxy/process_unix.go
 create mode 100644 proxy/process_windows.go

diff --git a/proxy/process.go b/proxy/process.go
index 91bfbd44..2c05f943 100644
--- a/proxy/process.go
+++ b/proxy/process.go
@@ -256,6 +256,7 @@ func (p *Process) start() error {
 	p.cmd.Env = append(p.cmd.Environ(), p.config.Env...)
 	p.cmd.Cancel = p.cmdStopUpstreamProcess
 	p.cmd.WaitDelay = p.gracefulStopTimeout
+	setProcAttributes(p.cmd)
 
 	p.cmdMutex.Lock()
 	p.cancelUpstream = ctxCancelUpstream
@@ -625,6 +626,7 @@ func (p *Process) cmdStopUpstreamProcess() error {
 		stopCmd := exec.Command(stopArgs[0], stopArgs[1:]...)
 		stopCmd.Stdout = p.processLogger
 		stopCmd.Stderr = p.processLogger
+		setProcAttributes(stopCmd)
 		stopCmd.Env = p.cmd.Env
 
 		if err := stopCmd.Run(); err != nil {
diff --git a/proxy/process_unix.go b/proxy/process_unix.go
new file mode 100644
index 00000000..3e8d5d75
--- /dev/null
+++ b/proxy/process_unix.go
@@ -0,0 +1,12 @@
+//go:build !windows
+
+package proxy
+
+import (
+	"os/exec"
+)
+
+// setProcAttributes sets platform-specific process attributes
+func setProcAttributes(cmd *exec.Cmd) {
+	// No-op on Unix systems
+}
diff --git a/proxy/process_windows.go b/proxy/process_windows.go
new file mode 100644
index 00000000..28a988bb
--- /dev/null
+++ b/proxy/process_windows.go
@@ -0,0 +1,16 @@
+//go:build windows
+
+package proxy
+
+import (
+	"os/exec"
+	"syscall"
+)
+
+// setProcAttributes sets platform-specific process attributes
+func setProcAttributes(cmd *exec.Cmd) {
+	cmd.SysProcAttr = &syscall.SysProcAttr{
+		HideWindow:    true,
+		CreationFlags: 0x08000000, // CREATE_NO_WINDOW
+	}
+}