chore: import upstream snapshot with attribution

python/samples/02-agents/context_providers/code_act/README.md

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+# CodeAct context providers
+
+Demonstrates the provider-owned CodeAct flow with two backends:
+
+| File | Backend | Notes |
+|------|---------|-------|
+| [`code_act.py`](code_act.py) | [Hyperlight](https://github.com/hyperlight-dev/hyperlight) WASM sandbox via `HyperlightCodeActProvider` | Hardened sandbox with WASM isolation; sandbox tools called via `call_tool(...)`. |
+| [`monty_code_act.py`](monty_code_act.py) | [Monty](https://github.com/pydantic/monty) Rust-based Python interpreter via `MontyCodeActProvider` (alpha) | Cross-platform pure interpreter; sandbox tools can be called as typed async functions (`await compute(...)`) or via `call_tool(...)`. |
+
+Both providers inject an `execute_code` tool into the agent and keep the
+registered sandbox tools (`compute`, `fetch_data`) hidden from the model — the
+model invokes them from inside the sandbox.
+
+## Installation
+
+```bash
+pip install agent-framework agent-framework-hyperlight --pre   # Hyperlight sample
+pip install agent-framework agent-framework-monty --pre        # Monty sample
+```
+
+> The Hyperlight Wasm backend is currently published only for `linux/x86_64` and
+> `win32/AMD64` with Python `<3.14`. On other platforms `execute_code` will fail
+> at runtime when it tries to create the sandbox.
+>
+> Monty is cross-platform and has no hypervisor/WASM backend dependency, but it
+> interprets a Python subset (e.g. `os`/network/subprocess access is blocked).
+> `agent-framework-monty` is an alpha package and is not yet part of
+> `agent-framework[all]`; install it explicitly with `--pre`.
+
+## Prerequisites
+
+- An Azure AI Foundry project endpoint (`FOUNDRY_PROJECT_ENDPOINT`)
+- A deployed model (`FOUNDRY_MODEL`)
+- Azure CLI authenticated (`az login`)
+
+## Run
+
+```bash
+python code_act.py        # Hyperlight
+python monty_code_act.py  # Monty
+```
+
+See the source files for the full annotated examples.