# If Something Goes Wrong

Fixes for the problems beginners hit most often during the quickstart.

| Symptom | Fix |
|---|---|
| `agen: command not found` | `/usr/local/bin` is not on your `PATH`. Open a new shell, or add it |
| The model list is empty after approving Copilot | The authorization did not finish or expired after 15 minutes. Re-run `/model` → add → GitHub Copilot and approve the new code |
| Every tool call stops and asks for confirmation | The TUI is in `safe` (`⏸ safe`): it starts there when the working directory is `$HOME`, outside `$HOME`, or a denied or sensitive path. **Shift+Tab** switches to `auto` (`⏵⏵ auto`), which only takes effect inside a subdirectory of `$HOME`; set one with **Shift+P** |
| The agent answers but never calls a tool | Small open-weight models drop tool calls. Register a larger model — a subscription provider (`codex`, `grok-oauth`, `copilot`) needs no per-token billing |
| A command fails with a permission error | Commands run inside an OS sandbox. See [Sandbox](/sandbox) for what it blocks and how to allow more |