Cursor Ask vs Agent vs Plan mode: which one to use
Cursor's Agent panel has more than one mode. Pick the wrong one and you either get a long answer when you wanted a change, or a pile of edits when you only wanted to understand something. This guide explains what each mode does and when to use it. Everything below comes from Cursor's own help pages and docs, read on October 16, 2026. We haven't tested these modes ourselves.
Not affiliated with or endorsed by Cursor. Modes and shortcuts change, so check Cursor's docs for your version.
The four modes at a glance
Cursor's Agent help page has a table of the modes. Here are its rows, word for word (checked Oct 2026):
| Mode | What Cursor says it's for | Can edit files? |
|---|---|---|
| Agent | "Building features, refactoring, fixing bugs" | "Yes" |
| Ask | "Understanding code, exploring architecture" | "No (read-only)" |
| Plan | "Complex features where you want to review the approach first" | "Yes (after you approve the plan)" |
| Debug | "Tricky bugs that need runtime evidence" | "Yes" |
The same page sums it up: "Use Agent for most tasks. Switch to Ask when you want answers without changes. Use Plan for multi-file features where you want to review the approach. Use Debug for bugs that are hard to reproduce or understand." (checked Oct 2026)
How to switch modes
Open the Agent panel with Cmd + I on Mac or Ctrl + I on Windows and Linux. Then, from the help page: "Press Shift + Tab to cycle through modes" or "Click the mode picker dropdown in the Agent panel". (checked Oct 2026)
One thing to know before you switch: "Each mode uses its own context, so switching modes starts a fresh context window." (checked Oct 2026)
Our advice, not a vendor quote: if Ask found something useful, copy the key points into your next message when you switch modes.
Agent mode: when you want changes made
Cursor's help page says to "Use Agent for most tasks." (checked Oct 2026) It also says: "Agent is Cursor's AI assistant. It searches your codebase, edits multiple files, runs terminal commands, and fixes errors on its own." And: "Give it a task in plain language and it figures out which files to read, what changes to make, and how to verify the result." (checked Oct 2026)
Its edits land straight away: "Agent's edits are applied as it works. Review them in the diff view and reject anything you don't want." (checked Oct 2026)
If it heads the wrong way: "Click the Stop button to stop Agent mid-task. This lets you redirect or start a different approach." (checked Oct 2026) To undo, "Hover over a previous message and click Restore Checkpoint in the bottom right to roll back all changes Agent made after that point. Restoring reverts files only; it does not remove messages from the conversation." (checked Oct 2026)
Checkpoints are not a backup. Cursor's Agent docs say: "Checkpoints are stored locally and separate from Git. Only use them for undoing Agent changes; use Git for permanent version control." (checked Oct 2026)
Our advice, not a vendor quote: commit your work with git before you give Agent a bigger task. Then you have a safe point even if a checkpoint doesn't cover it. Our guide on how to stop AI coding tools breaking your code covers that habit.
Ask mode: when you only want answers
Cursor's Ask mode page says: "Ask mode is a read-only mode for understanding your codebase. Agent answers questions and explores code without making any edits." (checked Oct 2026)
It gives examples such as "How does the authentication flow work?" and "Where is the database connection configured?" And: "For questions that lead to code changes, switch back to Agent mode." (checked Oct 2026)
Our advice, not a vendor quote: Ask is a good first step in a project you don't know yet, or one the AI wrote for you. Ask how it fits together before you ask for changes.
Plan mode: when you want to approve the approach first
Cursor's Plan mode docs say: "Plan Mode creates detailed implementation plans before writing any code. Agent researches your codebase, asks clarifying questions, and generates a reviewable plan you can edit before building." (checked Oct 2026)
The Plan mode help page walks through it: "Review the plan Agent creates. It opens as a virtual file you can read and edit." Then: "When you're happy with the plan, click Build to start coding." (checked Oct 2026)
The docs list when it fits, including "Tasks that touch many files or systems", "Unclear requirements where you need to explore before understanding scope" and "Architectural decisions where you want to review the approach first". (checked Oct 2026) For small jobs, the help page says: "For quick changes or tasks you've done many times, stay in Agent mode." (checked Oct 2026)
You may see Plan mode offered without asking: "Cursor also suggests it automatically when you type keywords that indicate complex tasks." (checked Oct 2026) The docs we read don't list which keywords.
Plans are files you can keep: "Plans are saved by default in your home directory. Click "Save to workspace" to move it to your workspace for future reference, team sharing, and documentation." (checked Oct 2026)
If the build goes wrong, go back to the plan
The docs say not to keep patching: "Revert the changes, refine the plan to be more specific about what you need, and run it again. This is often faster than fixing an in-progress agent, and produces cleaner results." (checked Oct 2026) The help page gives the steps: "Find the Revert button in the bottom right of a previous chat message", "Click Revert, then press Confirm to roll back your files to that stage", then "Refine your plan to be more specific, then run it again". (checked Oct 2026)
Debug mode: when a bug won't give up
Debug is the fourth mode. Cursor's Debug Mode docs say: "Instead of immediately writing code, the agent generates hypotheses, adds log statements, and uses runtime information to pinpoint the exact issue before making a targeted fix." (checked Oct 2026)
You take part: "Debug Mode asks you to reproduce the bug and provides specific steps." When the fix is confirmed, "the agent removes all instrumentation." (checked Oct 2026)
The docs place it after Agent: "When standard Agent interactions struggle with a bug, Debug Mode provides a different approach using runtime evidence rather than guessing at fixes." (checked Oct 2026) If you're stuck fixing the same bug over and over, see How to get out of an AI bug loop.
Do my rules still apply?
Yes. The Agent help page says: "Project rules, user rules, and team rules apply in Agent, Ask, Plan, and Debug modes." (checked Oct 2026) To set those up, see How to write Cursor rules: project rules and .mdc files.
Which one should I use?
Our advice, not a vendor quote: a simple rule, built on Cursor's own summary above.
- You want to understand code, not change it: Ask.
- A small, clear change you've done before: Agent.
- A change that touches many files, or you're not sure how to do it: Plan, then read the plan before you click Build.
- A bug you can reproduce but can't explain, or one Agent keeps failing to fix: Debug.
- Starting a different task: open a new chat.
Our advice, not a vendor quote: if you're unsure between Agent and Plan, pick Plan. Reading a plan costs you a minute. Undoing edits across many files costs more.
What the docs don't say
What Cursor's pages we read don't say: which keywords make Cursor suggest Plan mode, and whether Ask mode can run terminal commands (they only say it makes no edits). We don't guess at either here.
Related
- How to install Cursor and run your first task
- How to write Cursor rules: project rules and .mdc files
- How to stop AI coding tools breaking your code
- How to get out of an AI bug loop
We haven't tested these modes hands-on. This guide collects what Cursor's own docs say.
Not affiliated with or endorsed by Cursor. Modes and shortcuts change, so check Cursor's docs for your version.