diff --git a/dockerimg/testdata/testcreatedockerfile_empty_repo.httprr b/dockerimg/testdata/testcreatedockerfile_empty_repo.httprr
new file mode 100644
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+++ b/dockerimg/testdata/testcreatedockerfile_empty_repo.httprr
@@ -0,0 +1,77 @@
+httprr trace v1
+2790 1642
+POST https://api.anthropic.com/v1/messages HTTP/1.1
+Host: api.anthropic.com
+User-Agent: Go-http-client/1.1
+Content-Length: 2593
+Anthropic-Version: 2023-06-01
+Content-Type: application/json
+
+{
+ "model": "claude-3-7-sonnet-20250219",
+ "messages": [
+  {
+   "role": "user",
+   "content": [
+    {
+     "type": "text",
+     "text": "\nCall the dockerfile tool to create a Dockerfile.\nThe parameters to dockerfile fill out the From and ExtraCmds\ntemplate variables in the following Go template:\n\n```\nFROM {{.From}}\n\nRUN apk add bash git make jq sqlite gcc musl-dev linux-headers npm nodejs go github-cli ripgrep fzf\n\nENV GOTOOLCHAIN=auto\nENV GOPATH=/go\nENV PATH=\"$GOPATH/bin:$PATH\"\n\nRUN go install golang.org/x/tools/cmd/goimports@latest\nRUN go install golang.org/x/tools/gopls@latest\nRUN go install mvdan.cc/gofumpt@latest\n\n{{.ExtraCmds}}\n\nARG GIT_USER_EMAIL\nARG GIT_USER_NAME\n\nRUN git config --global user.email \"$GIT_USER_EMAIL\" \u0026\u0026 \\\n    git config --global user.name \"$GIT_USER_NAME\"\n\nLABEL sketch_context=\"{{.InitFilesHash}}\"\nCOPY . /app\n\nWORKDIR /app{{.SubDir}}\nRUN if [ -f go.mod ]; then go mod download; fi\n\nCMD [\"/bin/sketch\"]\n```\n\nIn particular:\n- Assume it is primarily a Go project. For a minimal env, prefer 1.24.2-alpine3.21 as a base image.\n- If any python is needed at all, switch to using a python alpine image as a the base and apk add go.\n  Favor using uv, and use one of these base images, depending on the preferred python version:\n    ghcr.io/astral-sh/uv:python3.13-alpine\n    ghcr.io/astral-sh/uv:python3.12-alpine\n    ghcr.io/astral-sh/uv:python3.11-alpine\n- When using pip to install packages, use: uv pip install --system.\n- Python env setup is challenging and often no required, so any RUN commands involving python tooling should be written to let docker build continue if there is a failure.\n- Include any tools particular to this repository that can be inferred from the given context.\n- Append || true to any apk add commands in case the package does not exist.\n- Do not expose any ports.\n"
+    },
+    {
+     "type": "text",
+     "text": "Now call the dockerfile tool.",
+     "cache_control": {
+      "type": "ephemeral"
+     }
+    }
+   ]
+  }
+ ],
+ "max_tokens": 8192,
+ "tools": [
+  {
+   "name": "dockerfile",
+   "description": "Helps define a Dockerfile that sets up a dev environment for this project.",
+   "input_schema": {
+    "type": "object",
+    "required": [
+     "from",
+     "extra_cmds"
+    ],
+    "properties": {
+     "from": {
+      "type": "string",
+      "description": "The alpine base image provided to the dockerfile FROM command"
+     },
+     "extra_cmds": {
+      "type": "string",
+      "description": "Extra commands to add to the dockerfile."
+     }
+    }
+   }
+  }
+ ]
+}HTTP/2.0 200 OK
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+Date: Sat, 05 Apr 2025 00:17:39 GMT
+Request-Id: req_01CT8x3PBEoaYUopedMVuEqp
+Server: cloudflare
+Via: 1.1 google
+X-Robots-Tag: none
+
+{"id":"msg_01SFTkFTza8Sagk4GWC5g1SJ","type":"message","role":"assistant","model":"claude-3-7-sonnet-20250219","content":[{"type":"text","text":"I'll help you create a Dockerfile using the dockerfile tool. Based on your requirements, I'll use the Go 1.24.2-alpine3.21 base image since you indicated it's primarily a Go project and no specific Python requirements were mentioned."},{"type":"tool_use","id":"toolu_01EN6SxM4w1B9onGtpLGnwNF","name":"dockerfile","input":{"from":"golang:1.24.2-alpine3.21","extra_cmds":"RUN echo \"Go development environment ready\""}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":970,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"output_tokens":145}}
\ No newline at end of file