Fix protobuf dependency conflict in e2b sandbox recipe

Use pixi feature environments to isolate dependency conflicts between
modular package (protobuf >=6.31.1) and e2b-code-interpreter (protobuf <6.0.0).

Create separate environments:
- server environment: Uses modular package for MAX Serve
- agent environment: Uses e2b-code-interpreter for code execution

This allows both components to work without dependency conflicts by
running in isolated pixi environments.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: williamw

code-execution-sandbox-agent-with-e2b/pyproject.toml

@@ -4,8 +4,6 @@ name = "code-execution-sandbox-agent-with-e2b"
 requires-python = ">=3.10,<3.13"
 version = "0.0.0"
 dependencies = [
-    "openai>=1.65.1,<2",
-    "e2b-code-interpreter>=1.0.5,<2",
     "python-dotenv>=1.0.1,<2",
     "rich>=13.9.4,<15",
 ]
@@ -28,10 +26,27 @@ platforms = ["linux-64", "linux-aarch64", "osx-arm64"]
 code_execution_sandbox_agent_with_e2b = { path = ".", editable = true }
 
 [tool.pixi.dependencies]
+python = ">=3.10,<3.13"
+
+# Feature for MAX server (needs modular package with newer protobuf)
+[tool.pixi.feature.server.dependencies]
 modular = ">=25.5.0.dev2025070905,<26"
 
+[tool.pixi.feature.server.pypi-dependencies]
+openai = ">=1.65.1,<2"
+
+# Feature for e2b agent (needs older protobuf)
+[tool.pixi.feature.agent.pypi-dependencies]
+openai = ">=1.65.1,<2"
+e2b-code-interpreter = ">=1.0.5,<2"
+
+# Define environments
+[tool.pixi.environments]
+server = ["server"]
+agent = ["agent"]
+
 [tool.pixi.tasks]
-server = "MAX_SERVE_PORT=8010 max serve --model-path modularai/Llama-3.1-8B-Instruct-GGUF --enable-structured-output"
 hello = "python hello.py"
-agent = "python agent.py"
 tests = "echo 'test passed'"
+server = "MAX_SERVE_PORT=8010 max serve --model-path modularai/Llama-3.1-8B-Instruct-GGUF --enable-structured-output"
+agent = "python agent.py"