diff --git a/containers/pyproject.toml b/containers/pyproject.toml
index c9f8b5a..bf04a19 100644
--- a/containers/pyproject.toml
+++ b/containers/pyproject.toml
@@ -9,7 +9,6 @@ authors = [
 requires-python = ">=3.12"
 dependencies = [
     "typing-extensions>=4.12",
-    "workers-runtime-sdk>=1.9.0",
 ]
 license = "MIT OR Apache-2.0"
 
@@ -48,4 +47,5 @@ dev = [
     "pytest-asyncio>=1.4.0",
     "ruff>=0.16.9",
     "ty>=0.0.84",
+    "workers-runtime-sdk>=1.9.0",
 ]
diff --git a/docs/docs/containers/getting-started.md b/docs/docs/containers/getting-started.md
index 11fca0b..db43715 100644
--- a/docs/docs/containers/getting-started.md
+++ b/docs/docs/containers/getting-started.md
@@ -11,8 +11,9 @@ container and routes requests to it from a Python Worker. By the end, each
 
 - [`uv`](https://docs.astral.sh/uv/) and Node.js, to build and deploy
   [Python Workers](https://developers.cloudflare.com/workers/languages/python/).
-  `containers-py` needs Python 3.12 or later and installs
-  `workers-runtime-sdk` 1.9.0 or later with it.
+  `containers-py` needs Python 3.12 or later and works with either
+  `crosswind-workers` or `workers-runtime-sdk`. This guide uses pywrangler,
+  which installs `workers-runtime-sdk`.
 - Docker, or another Docker-compatible engine, running locally. Check with
   `docker info`. Wrangler builds your image with it in both `dev` and
   `deploy`.
diff --git a/docs/docs/containers/overview.md b/docs/docs/containers/overview.md
index 95c022d..30e99a2 100644
--- a/docs/docs/containers/overview.md
+++ b/docs/docs/containers/overview.md
@@ -85,8 +85,8 @@ Add the package to a Python Worker project:
 uv add containers-py
 ```
 
-It needs Python 3.12 or later and installs `workers-runtime-sdk` 1.9.0 or
-later with it. Running a container also needs Docker locally and the Workers
+It needs Python 3.12 or later and works with either `crosswind-workers` or
+`workers-runtime-sdk`, whichever your project declares. Running a container also needs Docker locally and the Workers
 Paid plan. To create a project first, follow
 [Getting started](getting-started.md).
 
diff --git a/docs/docs/index.md b/docs/docs/index.md
index 8912d5a..f574b7e 100644
--- a/docs/docs/index.md
+++ b/docs/docs/index.md
@@ -125,9 +125,7 @@ makes the JavaScript calls.
 | [Workers](workers/overview.md)        | `crosswind-workers` | Drop-in replacement for the official `workers` package, with type hints on bindings, requests and Durable Objects. | [Write a Worker](workers/getting-started.md) | ![crosswind-workers on PyPI](https://img.shields.io/pypi/v/crosswind-workers) |
 | [Wynd](wynd/overview.md)              | `wynd`              | Replaces pywrangler. It drops vendored files your Worker never imports before each upload.   | [Switch from pywrangler](wynd/getting-started.md) | ![wynd on PyPI](https://img.shields.io/pypi/v/wynd)                   |
 
-For a new Python Worker that doesn't need an agent or a container, use
-`crosswind-workers` and deploy it with Wynd. `containers-py` depends on the
-official `workers-runtime-sdk`, so its guides use that package instead.
+For a new Python Worker, use `crosswind-workers` and deploy it with Wynd.
 
 ## How the packages work
 
diff --git a/docs/docs/introduction.md b/docs/docs/introduction.md
index a72d529..887a5b3 100644
--- a/docs/docs/introduction.md
+++ b/docs/docs/introduction.md
@@ -52,20 +52,15 @@ A project ships exactly one package named `workers`. Both
 `crosswind-workers` and Cloudflare's `workers-runtime-sdk` provide it, and
 `crosswind-workers` refuses to import when it finds the stock SDK installed.
 That choice decides your build tool, because pywrangler always installs
-`workers-runtime-sdk`.
-
-| Package               | With `crosswind-workers` and Wynd | With `workers-runtime-sdk` and pywrangler |
-| --------------------- | --------------------------------- | ----------------------------------------- |
-| `cf-agents`           | Yes                               | Yes                                       |
-| `crosswind-sandboxes` | Yes                               | Yes                                       |
-| `containers-py`       | No. It depends on `workers-runtime-sdk` 1.9.0 or later. | Yes                 |
+`workers-runtime-sdk`. `cf-agents`, `containers-py` and `crosswind-sandboxes` work with
+either SDK and install neither, so your project declares the one it uses.
 
 Wynd builds both kinds of project. It installs whichever runtime SDK your
 `pyproject.toml` declares, so you can switch an existing pywrangler project to
 Wynd and keep `workers-runtime-sdk`. `wynd types`, which writes a typed `Env`
 class from your Wrangler config, works only with `crosswind-workers`.
 
-For a new Worker that doesn't use `containers-py`, use `crosswind-workers` and
+For a new Worker, use `crosswind-workers` and
 Wynd. `uvx wynd init` writes that project for you.
 
 ## Which package to start with