From c8fd15cd1f0cb5b7cbfc6741bcbdf84a4da09a51 Mon Sep 17 00:00:00 2001
From: FlowmemoryAI <283694809+FlowmemoryAI@users.noreply.github.com>
Date: Wed, 13 May 2026 19:36:21 -0500
Subject: [PATCH] Avoid Windows cargo target locks in FlowChain scripts

---
 infra/scripts/flowchain-common.ps1 | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/infra/scripts/flowchain-common.ps1 b/infra/scripts/flowchain-common.ps1
index 0fc9d2d8..bca70a67 100644
--- a/infra/scripts/flowchain-common.ps1
+++ b/infra/scripts/flowchain-common.ps1
@@ -96,11 +96,21 @@ function Join-FlowChainProcessArguments {
 function Set-FlowChainCargoTargetDir {
     param(
         [Parameter(Mandatory = $true)]
-        [string] $RepoRoot
+        [string] $RepoRoot,
+
+        [string] $Purpose = "local"
     )
 
-    $targetDir = Join-Path $RepoRoot "crates/flowmemory-devnet/target"
+    $safePurpose = ($Purpose -replace '[^A-Za-z0-9_.-]', '-').Trim("-")
+    if ([string]::IsNullOrWhiteSpace($safePurpose)) {
+        $safePurpose = "local"
+    }
+
+    # Keep Cargo outputs away from the default crate target so a running local
+    # node cannot lock flowmemory-devnet.exe and break setup on Windows.
+    $targetDir = Join-Path $RepoRoot "devnet/local/cargo-target/$safePurpose-$PID"
     $env:CARGO_TARGET_DIR = $targetDir
+    New-Item -ItemType Directory -Force -Path $targetDir | Out-Null
     return $targetDir
 }