Your
Cursor
app is broken.
We fix it in 1 to 3 weeks.

If AI got you to a demo but not to production, we audit the code, decide what to rescue vs rebuild, and harden the critical paths so you can launch without months of debugging.

Get My Free Rescue PlanSee The Offer
AppStabilizer code rescue before and after
AppStabilizer stabilized app dashboard

Built with AI? Good. That tells us where to look first. Different tools create different kinds of mess.

Cursor
Bolt.new
v0
Lovable
Replit
Windsurf

The fastest path from broken demo
to stable product.

We do not sell mystery retainers. We audit the bottleneck, choose the shortest path to launch, and execute the critical fixes or rebuilds first.

audit — zsh

$ appstabilizer scan ./src

Scanning 247 files...

✗ config.ts:14 API key in client bundle

✗ page.tsx:87 N+1 query (47 fetches)

⚠ checkout/page.tsx No error boundary

⚠ useAuth.ts:23 Token in localStorage

○ components/ui/ 12 unused imports

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

23 issues · 3 crit · 7 high · 9 med

1. We Audit The Bottleneck

rescue/stabilize-codebase

Resolve circular deps

-12

Fix broken imports

+8-23

Add error boundaries

+47

Type 34 any → typed

+89-34

Run test suite

94%

2. We Fix Or Rebuild The Critical Path

your-startup
Production

Ready

2s ago · 4.1s

BuildingCompleted
Deployment1 Region
Domainsyourstartup.com
Functions12 Serverless
yourstartup.com

3. You Ship With Guardrails

Real Code, Real Cost

Fixing one bad route after launch costs more than building the whole app did.

This is a real API route. It works in dev, it passes code review, and it ships. Then someone sends a weird payload and your database is wide open. We see this in almost every codebase we audit.

route.ts
1
import { z } from "zod";
2
import { db } from "@/lib/db";
3
import { requireAdmin } from "@/lib/auth";
4
import { safeRedirect } from "@/lib/safe-redirect";
5
 
6
const inviteSchema = z.object({
7
email: z.email(),
8
next: z.string().optional(),
9
});
10
 
11
export async function POST(req: Request) {
12
const admin = await requireAdmin(req);
13
const payload = inviteSchema.parse(await req.json());
14
 
15
await db.query(
16
"INSERT INTO invites(email, redirect_to, created_by) VALUES ($1, $2, $3)",
17
[payload.email, safeRedirect(payload.next), admin.id]
18
);
19
 
20
return Response.json({ ok: true });
21
}
route.ts
1
import { db } from "@/lib/db";
2
 
3
export async function POST(req: Request) {
4
const body: any = await req.json();
5
 
6
const user = await db.query(
7
`SELECT * FROM users WHERE email = '${body.email}'`
8
);
9
 
10
const session = {
11
id: user.rows[0].id,
12
role: "admin",
13
token: body.token,
14
};
15
 
16
await db.query(
17
`INSERT INTO invites(email, redirect_to) VALUES ('${body.email}', '${body.next}')`
18
);
19
 
20
return Response.json({ ok: true, session });
21
}
Drag to compare

No input validation

Before: Anything goes in. Malformed data either crashes the endpoint or quietly corrupts rows in your database.

After: The request body gets checked before anything else runs. Garbage payloads never reach your business logic.

SQL injection

Before: User input goes straight into the query string. A crafted email field is enough to dump your entire users table.

After: Data and query logic are kept separate with parameterized queries. There is no string to inject into.

No access control

Before: There is no auth check. Anyone with the URL can call this endpoint and write to your database as if they were an admin.

After: The request is verified as an admin before the mutation runs. Everyone else gets a 403 and nothing happens.

Every week you wait,
the fix gets more expensive.

Broken auth, flaky deploys, and slow queries do not stay contained. Every new prompt usually adds more debt. The fastest way out is a clear decision on what to rescue, what to rebuild, and what to stop touching.

AppStabilizer code rescue before and after
AppStabilizer stabilized app dashboard

Codebase Rescue

When the foundation is mostly there, we untangle the code, remove dead weight, and stabilize the parts that keep breaking.

Strategic Rebuilds

When auth, payments, onboarding, or data flow are too brittle to trust, we rebuild those paths cleanly instead of stacking more patches on top.

Rate Limiting

429 throttle configured on all /api/* routes · 100 req/min per IP.

Input Validation

XSS & injection guards on 12 form endpoints.

Production Hardening

We add the guardrails AI usually skips: validation, rate limits, better error handling, and a safer deployment path.

API & Database Repair

Your app works fine with 10 users. With 1,000 it crawls. We find the slow queries, add the missing indexes, and fix the endpoints that break under real traffic.

Ongoing Support

Need help after launch? We can stay involved for hotfixes, releases, and new feature work without forcing you into a giant agency engagement.

What you leave with
is a safer way to ship.

Cleaner code. Critical-path tests. Safer deploys. Better handoff notes. And a product you can keep building on without praying before every release.

AppStabilizer code rescue before and after
AppStabilizer stabilized app dashboard

Dead Code Removal

AI writes code it never uses. Extra components, unused packages, functions nobody calls. We strip it all out so your app loads faster and your code actually makes sense.

appstabilizer.js

Auth & Security Fixes

API keys in the source code. No rate limiting. Auth that works for the demo but not for real users. We lock it all down before someone else finds the holes.

XSSFIXED
CSRFFIXED
JWTFIXED
0 VULNS
AuthFIXED
SQLiFIXED
SecretsFIXED

Test Coverage

Your app has zero tests right now. That means every change is a coin flip. We add tests to the parts that matter so you can update your code without breaking everything.

useCart.ts
index.ts
types.ts
0%
srchooksuseCart.ts
Explorer
src
hooks
useCart.ts
useAuth.ts
components
lib
index.ts
globals.css
1
export function addToCart(item: Product) {
2
const cart = getCart();
3
const existing = cart.find(i => i.id === item.id);
4
5
if (existing) {
6
existing.qty += 1;
7
} else {
8
cart.push({ ...item, qty: 1 });
9
}
10
11
saveCart(cart);
12
return cart.length;
13
}
CoverageStmts 84%Branch 67%Lines 91%Ln 5, Col 3

Performance Tuning

Slow page loads. Database queries that take seconds. Memory leaks that crash the browser tab. We find what's slow and make it fast.

Bundle Size

847kb→312kb-63%

Grand Slam Offer

Pick the fastest path from broken demo to stable launch.

Every engagement starts with a free audit. From there we recommend the right container: a rescue sprint if the core is salvageable, or a rebuild sprint if the risky parts need to be replaced.

Step 1

Free Rescue Audit

30-minute working session

We review the app, find the highest-risk bottlenecks, and tell you whether the fastest path is rescue, rebuild, or both.

  • Live code and deployment walkthrough
  • Priority issue map
  • Rescue-vs-rebuild recommendation
  • Fixed-scope next-step plan

Core Offer

1 to 2 Week Rescue Sprint

Best when the core app mostly works

We stabilize the parts worth keeping, remove dead weight, and harden the critical paths that are blocking launch.

  • Code cleanup and dependency untangling
  • Critical bug fixes and production hardening
  • Tests around the flows that matter most
  • Deployment fixes and launch support

Higher-Certainty Path

2 to 3 Week Rebuild Sprint

Best when the critical path is too brittle to patch

We rebuild the risky core, keep the rest moving, and give you a cleaner foundation to launch and extend.

  • Rewrite auth, payments, onboarding, or data flow
  • Replace fragile architecture around the critical path
  • Migration plan for users, data, and deploys
  • Cleaner handoff with documentation and support

Risk Reversal

Clarity first. Scope second.

  • If the audit does not end with a clear rescue-or-rebuild recommendation, we will not pitch a paid engagement.
  • If something inside the agreed scope breaks during the 14-day handoff window, we fix it.

What You Actually Buy

A fixed-scope path to launch.

Not an open-ended debug retainer. Not a giant rebuild by default. You get a clear decision, critical-path implementation, and a handoff you can keep building on.

  • Fixed scope, fixed price, fixed timeline before build starts
  • Daily updates while the work is live
  • Handoff notes, deployment help, and a cleaner release path
Get My Free Rescue Plan

Best fit for founders who already have an app, already have users or launch pressure, and want the fastest honest path to something they can actually ship.

Frequently Asked Questions

See all frequently asked questions