Automated Error Triage & Patch Engine•Sub-Second Execution

Turn cryptic stack traces into
instant root causes & Git diffs.

Unhandled runtime exceptions, type panics, and container crashes resolved in seconds. RunFix isolates offending frames and produces verified, git apply compatible diffs.

Open Workbench Star on GitHub

Real-Time Triage Workbench

Paste any terminal crash log, select your model, and generate instant unified diff patches.

Presets:

Model:

stderr (Raw Terminal Crash)

6 lines • 493 chars

Press ⌘+Enter to analyze

Resolution ReadyReady • Sub-Second Engine

Root Cause Diagnosis:

The 'users' collection is asynchronously populated via fetch/query. On initial mount before resolution, 'users' evaluates to undefined. Invoking Array.prototype.map without optional chaining causes an unhandled TypeError.

Generated Git Patch (`git apply` ready)src/components/UserProfileList.tsx

@@ -39,11 +39,11 @@ export function UserProfileList({ users, isLoading }: Props) {
   if (isLoading) {
     return <LoadingSkeleton count={3} />;
   }
   
-  return (
-    <div className="grid grid-cols-1 md:grid-cols-3 gap-4">
-      {users.map((user) => (
-        <UserCard key={user.id} user={user} />
-      ))}
-    </div>
-  );
+  return (
+    <div className="grid grid-cols-1 md:grid-cols-3 gap-4">
+      {(users ?? []).map((user) => (
-        <UserCard key={user.id} user={user} />
+        <UserCard key={user.id} user={user} />
       ))}
     </div>
   );
 }

Unified Diff (RFC 5322 compatible)

Engineered for Developers

Sub-second diagnosis. Zero hallucinated patches.

Multi-model flexibility with instant failover across Groq LPUs, River AI, and Google Gemini.

Instant Root-Cause Analysis

Zeros in on the exact file frame causing null pointer exceptions, unhandled rejections, or type panics across Node, Python, Go, and Rust.

Deterministic AST mapping

Clean Git Diff Patches

Receive standardized unified Git diffs formatted for direct terminal consumption via git apply patch.diff.

Zero syntax hallucination

High-Availability Failover

Automated multi-engine redundancy ensures zero interruptions. If one model endpoint experiences latency, fallback engines resolve your request instantly.

99.99% Availability

PUBLIC BETA • OPEN ACCESS

Built for Developers. Zero Paywalls.

Zero checkout flows, zero trial expiration traps, and no credit card required. Enjoy unthrottled developer error triage.

Unlimited Error Analysis

Analyze Node.js, Python, Go, Rust, or Docker crashes without worrying about token metering or paywalls.

Open AccessUnmetered

No Credit Card Required

Zero checkout modals, no surprise recurring charges, and zero personal tracking. Debug directly in browser.

Direct Access$0 / Month

Community & Developer First

Configured with high-performance default AI endpoints and complete BYOK support for custom private keys.

Open EcosystemBYOK Ready

FUTURE ROADMAP

Team Collaboration & Cloud LogsComing in Q4

Centralized team incident triaging, automated GitHub CI/CD Pull Request bots, and real-time Slack/Discord crash alerts are currently in active development for engineering organizations.

Try Sandbox Now

Turn cryptic stack traces into instant root causes & Git diffs.