add claude code sandbox tutorial (#26116)

Author: deathbyknowledge

src/content/docs/sandbox/tutorials/claude-code.mdx

@@ -0,0 +1,120 @@
+---
+title: Run Claude Code on a Sandbox
+pcx_content_type: tutorial
+sidebar:
+  order: 1
+description: Use Claude Code to implement a task in your GitHub repository.
+---
+
+import { Render, PackageManagers } from "~/components";
+
+Build a Worker that takes a repository URL and a task description and uses Sandbox SDK to run Claude Code to implement your task.
+
+**Time to complete:** 5 minutes
+
+## Prerequisites
+
+<Render file="prereqs" product="workers" />
+
+You'll also need:
+- An [Anthropic API key](https://console.anthropic.com/) for Claude Code
+- [Docker](https://www.docker.com/) running locally
+
+## 1. Create your project
+
+Create a new Sandbox SDK project:
+
+<PackageManagers
+	type="create"
+	pkg="cloudflare@latest"
+	args={"claude-code-sandbox --template=cloudflare/sandbox-sdk/examples/claude-code"}
+/>
+
+```sh
+cd claude-code-sandbox
+```
+
+## 2. Set up local environment variables
+
+Create a `.dev.vars` file in your project root for local development:
+
+```sh
+echo "ANTHROPIC_API_KEY=your_api_key_here" > .dev.vars
+```
+
+Replace `your_api_key_here` with your actual API key from the [Anthropic Console](https://console.anthropic.com/).
+
+:::note
+The `.dev.vars` file is automatically gitignored and only used during local development with `npm run dev`.
+:::
+
+## 3. Test locally
+
+Start the development server:
+
+```sh
+npm run dev
+```
+
+:::note
+First run builds the Docker container (2-3 minutes). Subsequent runs are much faster.
+:::
+
+Test with curl:
+
+```sh
+curl -X POST http://localhost:8787/ \
+  -d '{
+    "repo": "https://github.com/cloudflare/agents",
+    "task": "remove the emojis from the readme"
+  }'
+```
+
+Response:
+
+```json
+{
+  "logs": "Done! I've removed the brain emoji from the README title. The heading now reads \"# Cloudflare Agents\" instead of \"# 🧠 Cloudflare Agents\".",
+  "diff": "diff --git a/README.md b/README.md\nindex 9296ac9..027c218 100644\n--- a/README.md\n+++ b/README.md\n@@ -1,4 +1,4 @@\n-# 🧠 Cloudflare Agents\n+# Cloudflare Agents\n \n ![npm install agents](assets/npm-install-agents.svg)\n "
+}
+```
+
+## 4. Deploy
+
+Deploy your Worker:
+
+```sh
+npx wrangler deploy
+```
+
+Then set your Anthropic API key as a production secret:
+
+```sh
+npx wrangler secret put ANTHROPIC_API_KEY
+```
+
+Paste your API key from the [Anthropic Console](https://console.anthropic.com/) when prompted.
+
+:::caution
+After first deployment, wait 2-3 minutes for container provisioning. Check status with `npx wrangler containers list`.
+:::
+
+## What you built
+
+You created an API that:
+- Accepts a repository URL and natural language task descriptions
+- Creates a Sandbox and clones the repository into it
+- Kicks off Claude Code to implement the given task
+- Returns Claude's output and changes
+
+## Next steps
+
+- [Analyze data with AI](/sandbox/tutorials/analyze-data-with-ai/) - Add pandas and matplotlib for data analysis
+- [Code Interpreter API](/sandbox/api/interpreter/) - Use the built-in code interpreter instead of exec
+- [Streaming output](/sandbox/guides/streaming-output/) - Show real-time execution progress
+- [API reference](/sandbox/api/) - Explore all available methods
+
+## Related resources
+
+- [Anthropic Claude documentation](https://docs.anthropic.com/)
+- [Workers AI](/workers-ai/) - Use Cloudflare's built-in models