Updated June 2026
Cursor’s Agent mode can plan and edit across files autonomously — when it works. If it stalls, makes no edits, or quits mid-task, the cause is usually model access, permissions, or a stale index.
⚡ Quick fix
- Confirm you’ve selected an agent-capable model.
- Allow Cursor to run tools/edit files when prompted.
- Re-index your codebase if context is missing.
- Check you haven’t hit a request/usage limit.
1. Pick the right model
Agent mode needs a capable model. Lightweight models may chat but won’t drive multi-step edits.
- Open the model selector in the Cursor chat panel.
- Choose a current agent-grade model (e.g. a frontier Claude/GPT/Gemini tier).
- Retry your task.
2. Grant tool & edit permissions
Agent mode acts on your files only if you let it. If you dismissed a permission prompt, it can’t make changes.
3. Re-index the codebase
Without an up-to-date index, the agent lacks context and gives shallow results.
- Go to Settings > Features > Codebase Indexing.
- Rebuild the index.
- Add heavy folders to
.cursorignoreso indexing finishes.
auth.ts“) instead of a vague one (“fix my app”). Scope dramatically improves reliability.4. Check usage limits
| Symptom | Likely cause | Fix |
|---|---|---|
| Stops mid-task | Request limit reached | Check plan usage; wait/upgrade |
| No edits made | Permission denied | Approve tool prompts |
| Shallow output | Missing index | Re-index codebase |
| Errors on run | Connection/model | Switch model, check network |
FAQ
Why does the agent stop halfway? Usually a hit usage limit or a pending permission prompt.
Is Agent mode safe on my repo? It only edits what you approve — review its diffs before accepting.
Bottom line: choose an agent-capable model, approve its permissions, and re-index — that gets Agent mode running again.