Is Cline Safe?
Cline is safe as a VS Code extension. Autonomous agent mode raises the stakes though · Cline can edit files, run terminal commands, and hit APIs on your behalf. Never approve auto-run in a repo with real production credentials.
Known risks
- Autonomous shell execution · Cline in auto-approve mode can run `rm`, `curl`, or credential-leaking commands without a confirmation step.
- API key handling · Cline uses your Anthropic/OpenAI/OpenRouter key. If misconfigured, keys can end up in logs or shared configs.
- Agent-generated code quality · Same as other AI coders · auth, RLS, and secret handling all need review.
How to make it safer
- Disable auto-approve for terminals · Require explicit approval for every shell command until you fully trust the workflow.
- Sandbox the workspace · Run Cline against a dev/test repo, not one with real production DB credentials in `.env`.
- Scan the output · Cline-generated apps get the same 51-check scan as any other · SimplyScan flags what it produces.
Frequently asked
Is Cline safe to give shell access?
Only in a sandboxed workspace. Auto-approve on your main dev machine is risky.
Does Cline retain my code?
No · Cline runs locally. Retention depends on the underlying model provider (Anthropic, OpenAI, etc.).
Is Cline OK for production code?
The tool is fine. The output needs review like all AI-written code.