docs: add guide for using Claude Code with Docker Model Runner

content/guides/claude-code-model-runner.md

@@ -0,0 +1,143 @@
+---
+title: Use Claude Code with Docker Model Runner
+description: Configure Claude Code to use Docker Model Runner so you can code with local models.
+summary: |
+  Connect Claude Code to Docker Model Runner with the Anthropic-compatible API,
+  package `gpt-oss` with a larger context window, and inspect requests.
+keywords: ai, claude code, docker model runner, anthropic, local models, coding assistant
+params:
+  tags: [ai]
+  time: 10 minutes
+---
+
+This guide shows how to run Claude Code with Docker Model Runner as the backend
+model provider. You'll point Claude Code at the local Anthropic-compatible API,
+run a coding model, and package `gpt-oss` with a larger context window for
+longer repository prompts.
+
+## Prerequisites
+
+Before you start, make sure you have:
+
+- [Docker Desktop](../get-started/get-docker.md) or Docker Engine installed
+- [Docker Model Runner enabled](../manuals/ai/model-runner/get-started.md#enable-docker-model-runner)
+- [Claude Code installed](https://code.claude.com/docs/en/quickstart)
+
+If you use Docker Desktop, turn on TCP access in **Settings** > **AI**, or run:
+
+```console
+$ docker desktop enable model-runner --tcp 12434
+```
+
+## Step 1: Pull a coding model
+
+Pull a model before you start Claude Code:
+
+```console
+$ docker model pull ai/devstral-small-2
+```
+
+You can also use `ai/qwen3-coder` if you want another coding-focused model with
+a large context window.
+
+## Step 2: Start Claude Code with Docker Model Runner
+
+Set `ANTHROPIC_BASE_URL` to your local Docker Model Runner endpoint when you run
+Claude Code.
+
+On macOS or Linux:
+
+```console
+$ ANTHROPIC_BASE_URL=http://localhost:12434 claude --model ai/devstral-small-2
+```
+
+On Windows PowerShell:
+
+```powershell
+$env:ANTHROPIC_BASE_URL="http://localhost:12434"
+claude --model ai/devstral-small-2
+```
+
+Claude Code now sends requests to Docker Model Runner instead of Anthropic's
+hosted API.
+
+## Step 3: Make the endpoint persistent
+
+To avoid setting the environment variable each time, add it to your shell
+profile:
+
+```bash {title="~/.bashrc or ~/.zshrc"}
+export ANTHROPIC_BASE_URL=http://localhost:12434
+```
+
+After you reload your shell, you can run Claude Code with only the model flag:
+
+```console
+$ claude --model ai/devstral-small-2
+```
+
+## Step 4: Package `gpt-oss` with a larger context window
+
+`ai/gpt-oss` defaults to a smaller context window than coding-focused models. If
+you want to use it for repository-scale prompts, package a larger variant:
+
+```console
+$ docker model pull ai/gpt-oss
+$ docker model package --from ai/gpt-oss --context-size 32000 gpt-oss:32k
+```
+
+Then run Claude Code with the packaged model:
+
+```console
+$ ANTHROPIC_BASE_URL=http://localhost:12434 claude --model gpt-oss:32k
+```
+
+## Step 5: Verify the API endpoint
+
+Send a test request to confirm the Anthropic-compatible API is reachable:
+
+```console
+$ curl http://localhost:12434/v1/messages \
+  -H "Content-Type: application/json" \
+  -d '{
+    "model": "ai/devstral-small-2",
+    "max_tokens": 32,
+    "messages": [{"role": "user", "content": "Say hello"}]
+  }'
+```
+
+For more details about the request format, see the
+[Anthropic-compatible API reference](../manuals/ai/model-runner/api-reference.md#anthropic-compatible-api).
+
+## Step 6: Inspect Claude Code requests
+
+To inspect the requests Claude Code sends to Docker Model Runner, run:
+
+```console
+$ docker model requests --model gpt-oss:32k | jq .
+```
+
+This helps you debug prompts, context usage, and compatibility issues.
+
+## Troubleshooting
+
+If Claude Code can't connect, check Docker Model Runner status:
+
+```console
+$ docker model status
+```
+
+If Claude Code can't find the model, list local models:
+
+```console
+$ docker model ls
+```
+
+If the model is missing, pull it first. If needed, use the fully qualified
+model name, such as `ai/devstral-small-2`.
+
+## Learn more
+
+- [Docker Model Runner overview](../manuals/ai/model-runner/_index.md)
+- [Docker Model Runner API reference](../manuals/ai/model-runner/api-reference.md)
+- [IDE and tool integrations](../manuals/ai/model-runner/ide-integrations.md)