From 582038e009a4649e7dc001eea98c7a37d9389950 Mon Sep 17 00:00:00 2001
From: Jeena <hello@jeena.net>
Date: Thu, 22 Jan 2026 01:39:44 +0900
Subject: [PATCH] Disallow running more than one instance of opercode

We don't want to let people run more than one instance of opencode
in one project directory, this will lead to chaos and then
they interfear with each other in weird ways like when one
stopps it crashes the other, etc.
---
 opencode-container.py | 22 +++++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)

diff --git a/opencode-container.py b/opencode-container.py
index 84a7919..2419caa 100755
--- a/opencode-container.py
+++ b/opencode-container.py
@@ -1,12 +1,20 @@
 #!/usr/bin/env python3
 
 import hashlib
+import logging
 import os
 import subprocess
 import sys
 import time
 from pathlib import Path
 
+logging.basicConfig(
+    level=logging.INFO,
+    format='%(message)s',
+    stream=sys.stderr
+)
+logger = logging.getLogger(__name__)
+
 
 class OpenCodeContainer:
     IMAGE = "opencode-container:latest"
@@ -45,6 +53,14 @@ class OpenCodeContainer:
         # Ensure container home directory exists
         self.container_home_path.mkdir(parents=True, exist_ok=True)
 
+        # Check if this project already has a running container
+        if self.container_exists() and self.container_running():
+            logger.error(f"Project '{self.project_path.name}' already has a running OpenCode container.")
+            logger.error(f"Container name: {self.container_name}")
+            logger.error("Wait for the current instance to finish or manually stop it with:")
+            logger.error(f"  docker stop {self.container_name}")
+            sys.exit(1)
+
         # Pre-create project directory structure to prevent root-owned directories
         try:
             relative_path = self.project_path.relative_to(Path.home())
@@ -60,7 +76,7 @@ class OpenCodeContainer:
             self.create_container()
 
         if not self.start_container():
-            print("Recreating container due to failed start")
+            logger.warning("Recreating container due to failed start")
             self.remove_container()
             self.create_container()
             if not self.start_container():
@@ -83,7 +99,7 @@ class OpenCodeContainer:
         ).returncode == 0
 
     def build_image(self) -> None:
-        print(f"Building image '{self.IMAGE}' with user {self.host_username} ({self.host_uid}:{self.host_gid})")
+        logger.info(f"Building image '{self.IMAGE}' with user {self.host_username} ({self.host_uid}:{self.host_gid})")
         self._run([
             "docker", "build",
             "--build-arg", f"USERNAME={self.host_username}",
@@ -98,7 +114,7 @@ class OpenCodeContainer:
     # =========================
 
     def create_container(self) -> None:
-        print(f"Creating container '{self.container_name}'")
+        logger.info(f"Creating container '{self.container_name}'")
 
         self._run([
             "docker", "create",