Add verbose setup docs to test_mutate.jl

Author: Sixzero

examples/test_mutate.jl

@@ -1,3 +1,63 @@
+#=
+Mutation Injection Test
+========================
+
+This example demonstrates routing Anthropic API calls through CLIProxyAPI
+before and after applying the mutation injection.
+
+## Prerequisites
+
+### 1. Install CLIProxyAPI
+```bash
+curl -fsSL https://raw.githubusercontent.com/brokechubb/cliproxyapi-installer/refs/heads/master/cliproxyapi-installer | bash
+```
+
+### 2. Login to providers (one-time setup)
+```bash
+cd ~/cliproxyapi
+
+# Login commands (prints URL, use --no-browser to avoid auto-open):
+./cli-proxy-api --claude-login --no-browser    # Claude/Anthropic
+./cli-proxy-api --codex-login --no-browser     # OpenAI/Codex
+./cli-proxy-api --login --no-browser           # Gemini/Google
+./cli-proxy-api --qwen-login --no-browser      # Qwen
+./cli-proxy-api --iflow-login --no-browser     # iFlow
+```
+
+### 3. Start the proxy server
+```bash
+# Manual:
+cd ~/cliproxyapi && ./cli-proxy-api
+
+# Or via systemd:
+systemctl --user enable cliproxyapi.service
+systemctl --user start cliproxyapi.service
+systemctl --user status cliproxyapi.service
+```
+
+### 4. Set API key environment variable
+The API key is stored in `~/cliproxyapi/config.yaml` under the `api-keys:` key.
+Export the first key:
+```bash
+export CLIPROXYAPI_API_KEY="your-api-key-from-config.yaml"
+```
+
+Or add to your shell profile (~/.bashrc, ~/.zshrc, etc.):
+```bash
+echo 'export CLIPROXYAPI_API_KEY="your-api-key"' >> ~/.bashrc
+```
+
+## Troubleshooting
+
+- **Model not found after mutate**: CLIProxyAPI not logged in for that provider.
+  Run the appropriate login command above.
+- **Connection refused**: Proxy server not running. Start it with `./cli-proxy-api`.
+- **401 Unauthorized**: CLIPROXYAPI_API_KEY not set or incorrect.
+
+## Default endpoint
+CLIProxyAPI runs on `http://localhost:8317/v1` (OpenAI-compatible API).
+=#
+
 using OpenRouter
 using OpenRouterCLIProxyAPI