The short answer: stop re-sending the same prompt. Lovable’s own docs say to work through three steps instead: ask it to investigate (describe what you see and what you expected), revert to the version just before the problem and re-prompt more specifically, then switch to Plan mode and approve an approach before it builds. Reverting does not refund credits already spent: the docs say messages you later revert still count. Plan mode costs one credit per message plus any research. The “Try to fix” button is free for your first 10 uses; the docs do not publish a price for fixes after that, so treat each further attempt as paid work.
Pick your symptom
| What you see | Do this first | Credit cost (Lovable docs) |
|---|---|---|
| A red build error and a “Try to fix” button | Use it once or twice | Free for 10 fixes; later cost not published |
| The same error returns after each fix | Stop fixing. Ask Lovable to investigate in Chat or Plan mode | Chat: typically a fraction of a credit, covered first by the daily chat allowance. Plan: 1 credit plus research |
| No error, but the app does the wrong thing | Describe what you see and what you expected; ask it to walk you through what is happening | Same as above |
| A change broke something that worked | Revert to the version before it | Credits already spent on reverted messages are not refunded; revert restores code only, not database data |
| Lovable ignores a rule you keep repeating | Move the rule into Knowledge | No cost stated; each file holds up to 10,000 characters |
| Everything you try gets worse | Revert, then Plan mode, then rebuild in small steps | 1 credit per Plan message, then build usage |
The three official steps, with notes
1. Ask Lovable to investigate. The docs say Lovable “can inspect errors, logs, and console output, and test your app in a browser.” Give it a symptom and an expectation, not a fix: “The login form does nothing on mobile. Walk me through what’s happening.” In Chat mode this changes no code and costs a fraction of a credit.
2. Revert and re-prompt. Every change Lovable makes is saved as a version, and the History panel lets you open any version, see the code diff, and revert. Two things to know from the version history docs: reverting restores code only (and redeploys edge functions to match), so records, data changes or migrations made by later messages are not undone; and you can instead hover over one of your own earlier messages, choose Edit message, and use “Revert and resend” to take a different instruction from that point. The messages after the revert point stay in the chat, so nothing is lost.
3. Plan before rebuilding. Plan mode investigates and writes a plan you can edit and approve, and never changes your code. The docs list “investigate a bug or an error and approve the fix before any code changes” as a use.
What a loop costs: worked arithmetic
Lovable publishes illustrative Build costs, not a price per fix: 0.50 credits to make a button gray, 0.90 to remove a footer, 1.20 to add authentication, 2.00 for a landing page with images. These are examples, and real usage varies. Using them only as a yardstick:
- Ten more fix attempts after your free ones, if each cost the 1.20 of the authentication example: 10 x 1.20 = 12 credits.
- At the Pro plan’s base rate ($25 for 100 credits, so $0.25 a credit): 12 x $0.25 = $3.00.
- If paid from top-ups at Pro’s $0.30 a credit: 12 x $0.30 = $3.60.
- The alternative: one Plan message (1 credit, plus research) then one clearly scoped build. Even at 3 credits in total, that is $0.75 at $0.25.
The point of the sum is the ratio, not the dollars: a loop multiplies a single step’s cost by the number of retries, while a plan caps it. See Lovable pricing explained for the plan rates and our credit cost calculator for a full build.
The free allowance is also smaller than it looks. The docs say the 10 free fixes are shared across “Try to fix” and fixes from the Security view, in all your workspaces and projects, and each one returns 24 hours after use.
Stop it happening again
- Put standing rules in Knowledge. Workspace knowledge holds coding style, preferred libraries and brand voice; project knowledge holds what the application does, user personas, domain terminology, database schema and design guidelines. Each is limited to 10,000 characters, so keep it short (Knowledge docs).
- One change per message. A request that touches many files gives the agent more ways to break something that worked.
- Bookmark known-good versions in the History panel so you know where to return to.
- Check what is running when credits end. Cloud-backed apps can pause at zero credits; see what happens when AI builder credits run out.
- Keep long chats from drifting: protecting the context window in long builds covers it across builders.
When it is not a loop
If a prompt such as “change the header color” fails on its own and every message errors, that points to the project or to Lovable, not your wording. Lovable’s docs say that on Enterprise plans you can open a support request for the project from inside the editor. For security-related failures, such as data not loading because of access rules, use our Lovable security checklist rather than retrying prompts.
Method note
Researched from Lovable’s official documentation and credits pages; checked 2 October 2026. Credit figures are the vendor’s illustrative examples; the arithmetic is ours, labelled as such, and no repair outcomes were measured. Project monitoring (a scheduled watch that posts a brief in chat when it detects an issue, off by default) also exists per the same docs.