From 952dfbef36a047ba515af35146b0c86415cd7f10 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Adri=C3=A0=20Arrufat?= <adria.arrufat@gmail.com>
Date: Sun, 1 Mar 2026 21:39:38 +0900
Subject: [PATCH] mcp: use acquire/release ordering for server running flag

---
 src/mcp/Server.zig | 2 +-
 src/mcp/router.zig | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/mcp/Server.zig b/src/mcp/Server.zig
index 91823ef1..02e99abc 100644
--- a/src/mcp/Server.zig
+++ b/src/mcp/Server.zig
@@ -156,7 +156,7 @@ fn initResources(allocator: std.mem.Allocator) ![]const protocol.Resource {
 }
 
 pub fn deinit(self: *Self) void {
-    self.is_running.store(false, .seq_cst);
+    self.is_running.store(false, .release);
 
     self.browser.deinit();
     self.allocator.destroy(self.browser);
diff --git a/src/mcp/router.zig b/src/mcp/router.zig
index a39dc7bd..2e021114 100644
--- a/src/mcp/router.zig
+++ b/src/mcp/router.zig
@@ -13,12 +13,12 @@ pub fn processRequests(server: *Server) !void {
     var stdin_buf: [8192]u8 = undefined;
     var stdin = stdin_file.reader(&stdin_buf);
 
-    server.is_running.store(true, .seq_cst);
+    server.is_running.store(true, .release);
 
     var arena: std.heap.ArenaAllocator = .init(server.allocator);
     defer arena.deinit();
 
-    while (server.is_running.load(.seq_cst)) {
+    while (server.is_running.load(.acquire)) {
         const msg = stdin.interface.adaptToOldInterface().readUntilDelimiterAlloc(server.allocator, '\n', 1024 * 1024 * 10) catch |err| {
             if (err == error.EndOfStream) break;
             return err;