Cursor Background Agent vs Local: When to Use Which
Cursor Background Agent is not “sit in chat and steer every turn.” It is a product/workflow: hand off a task, leave, and come back to proof that the work is done. Official docs now also call this lineage Cloud Agents. This post is not a VM/PR setup rehash—only the kickoff → async run → review axis.
The adjacent post cursor-cloud-vs-local-agent covers Cloud VM and branch/PR handoff. Here we only cover when background? · vs local? · how to review?. No pricing, plans, tokens, or affiliate links. Grounded in What are background agents?, Cloud Agents, and Agent overview.
When background?
One-line answer: Choose Background when the scope is already closed, you do not need to hold the laptop, and you can verify with proof (logs, tests, artifacts, PR) when it returns.
Signals to pick Background (async long-running agent):
| Signal | Why Background |
|---|---|
| Long-running | Plans, edits, commands, and tests over minutes or hours—no need to keep a local session open |
| Leave your seat | Runs remotely to completion and reports back with proof |
| Clear scope | Goal, repro command, paths, and non-goals fit in one block |
| Parallel | Multiple jobs without blocking one local chat thread |
| Verifiable | Build/test/screenshots/logs can attach to the result |
Kickoff checklist:
- Is Done objective (command exit 0, or “PR + artifacts”)?
- Are scope paths and non-goals in one paragraph?
- Does it depend on uncommitted local experiments? (Remote usually starts from a clean git state; commit or stash first.)
- Are secrets, network, and deps already in the remote environment?
- If you must steer with follow-ups right now → still local.
Copy-paste kickoff skeleton:
Background task (async):
Goal: <outcome + proof>
Repro / Done (must exit 0):
<exact command>
Scope: <paths>
Out of scope: <list>
Do not ask mid-run; report blockers with log + command.Boundary: cursor-cloud-vs-local-agent is about where it runs and PR handoff. This section is whether you are ready to hand it off asynchronously.
vs local?
One-line answer: Local Agent stays on the open workspace and steers immediately; Background runs unattended and talks through results. The split is feedback loop, context, and rollback—not the tool list.
| Axis | Local (sidepane Agent) | Background (async) |
|---|---|---|
| Loop | Queue, Steer, instant follow-up | Kickoff, then report/artifacts |
| Context | Unsaved buffers, local-only files, debugger/board | What the remote clone/environment has |
| Rollback | Session Checkpoints (separate from Git) | Branch/commit and per-run review |
| Interrupt | Sensitive to sleep/session end | Continues remotely |
| Fit | Fuzzy design, short patches, hardware/VPN | Fixed scope, long runs, parallel |
Prefer local when:
- Design is still fuzzy — Ask/Plan first, then a small patch.
- You need unsaved or local-only files, USB/board, or corp VPN tools.
- You must steer every few sentences (Steer/queue).
- The Background environment cannot reproduce yet — fix the command locally first.
- Policy forbids putting the data on a remote run.
Local Agent still uses terminal, browser, and edits. The difference is not capability—it is whether someone sits beside the loop. Background is the contract to leave that seat.
How to review?
One-line answer: Review Background output as a proof pack, not a one-line chat summary. Check artifacts, repro command, diff scope, and non-goal bleed; if unclear, finish only on local.
Review checklist:
[ ] Done command (or agreed tests) green? Logs/artifacts attached?
[ ] Diff inside Scope paths? Out-of-scope touch → revert or split ticket
[ ] No secrets/credentials leaked into commit/logs?
[ ] If PR/branch: CI required and message/screenshots align?
[ ] “Agent said done” with no repro → review incomplete
[ ] Leftovers (naming, edges, local-only checks) handed to local Agent only?Suggested review order:
- Proof first — test logs, screenshots/video, agent URL.
- Scope diff — paths and file count match the kickoff.
- Risk surface — auth, migrations, public APIs, secret scan.
- Accept or transfer — pass → merge/next step; fail/fuzzy → paste repro + failing log into local chat for a short fix.
Docs describe Background/Cloud agents attaching videos, screenshots, and logs, and optionally using remote desktop to validate. Review is not “trust the summary”—it is whether a human (or CI) can see the same Done command.
One-liner: Background = prepared async kickoff; local = immediate steer; review = proof · scope · secrets. Different axis from the Cloud VM/PR handoff post.
FAQ
Are Background and Cloud Agent different products?
Docs describe background agents as long remote runs and call them Cloud Agents in Cursor. If UI or older docs say Background, treat them as the same lineage. This post focuses on async workflow and review, not the name.
How is this different from weekly cursor-cloud-vs-local-agent?
That post is Cloud VM · PR · handoff. This post is background kickoff timing, loop differences vs local, and a result-review checklist.
Does Move to Cloud take local dirty files?
Docs note conversation context can transfer, but uncommitted dirty files often are not snapshotted. Commit or stash before kickoff if you need the latest state in Background.
Merge without review?
No. Background proof is review input, not merge approval. CI required, human eval, and secret policy still apply.
Sources
- What are background agents? — long-running, remote, proof
- Cloud Agents — isolated runs and environments (Cloud naming)
- Cloud Agent capabilities — artifacts, desktop
- Cursor Agent overview — local sidepane, checkpoints, queue/Steer
- Adjacent: cursor-cloud-vs-local-agent (Cloud/PR VM and handoff)