A name may be null.
{ "name": null }The contract changed. That alone does not prove your app will fail.
The AI maintenance agent for API applications.
Catch changing contracts. Send the fix to an AI agent. Review a small, source-checked pull request instead of starting from a blank editor.
Start watching one repository free. AI patch previews on Solo and above.
Handle the nullable customer name.
− name.trim()
+ name?.trim() || "Guest"Illustrative preview. Try the runnable fixture below.
A field becomes optional. A dependency moves. Somewhere in your code, yesterday’s assumption is still running.
Berzz connects the evidence to your code. Its maintenance agent can read the relevant files, prepare a bounded patch, and bring the diff back for your review.
Follow the evidence
Synthetic Example CRM scenario
{ "name": null }The contract changed. That alone does not prove your app will fail.
name.trim()Review the API version and caller before deciding whether to patch.
Evidence you can inspect. An action you can review.
No sales call. No connected account.
This check runs right here in your browser.
A contract changes
In this example, the customer endpoint begins allowing null. The existing formatter calls trim without checking.
name: string
name: string | null
const label = customer.name.trim();Try the original code, then preview the fix and run the check again.
This check executes only the bundled fixture in your browser. Customer patches still require review and CI verification.
Build confidence before you add more.
$0/ month
One codebase, read when you ask.
1 repository · 1 seat
Connect a repository ↗$49/ month
Three codebases, scheduled checks, and 20 fix attempts per month.
3 repositories · 1 seat
Connect a repository ↗$199/ month
Ten codebases, five seats, scheduled checks, and fix pull requests.
10 repositories · 5 seats
Connect a repository ↗All accounts start free. Choose a paid plan from your workspace. Scheduled checks depend on source availability. Billing and tax handled by Dodo Payments.
Berzz reads source and published vendor material. Source matches need review against the API version you use. Unsupported integrations and incomplete reads stay visible.
The agent checks source matches and change size before publication. GitHub CI results stay visible after you open a PR. You review and merge; missing tests are never called a pass.