Fix code context state isolation

.changeset/fix-code-context-isolation.md

@@ -0,0 +1,5 @@
+---
+'@cloudflare/sandbox': patch
+---
+
+Fix code context isolation bug where contexts leaked state after 10 executions. Each code context now gets a dedicated executor process from creation to deletion, ensuring complete isolation between contexts. Removed maximum pool size limits to allow organic scaling.

packages/sandbox-container/package.json

@@ -13,6 +13,7 @@
   },
   "dependencies": {
     "@repo/shared": "*",
+    "async-mutex": "^0.5.0",
     "esbuild": "^0.27.0",
     "zod": "^3.22.3"
   },

packages/sandbox-container/src/handlers/interpreter-handler.ts

@@ -9,8 +9,10 @@ import type {
 import { ErrorCode } from '@repo/shared/errors';
 
 import type { RequestContext } from '../core/types';
-import type { CreateContextRequest } from '../interpreter-service';
-import type { InterpreterService } from '../services/interpreter-service';
+import type {
+  CreateContextRequest,
+  InterpreterService
+} from '../services/interpreter-service';
 import { BaseHandler } from './base-handler';
 
 export class InterpreterHandler extends BaseHandler<Request, Response> {