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Grok+17 agentsWebSocket Integration Debugger
Systematic debugger for WebSocket handshakes, event flows, and reconnection logic across all major frameworks.
$9.99
WebSocket Integration Debugger
Example session with this skill installed
My React app uses Socket.IO. It connects fine locally but fails on the staging server with a 400 Bad Request during the handshake. Here are the headers from the failed request.
- Read your context and instructions
- Compiled the websocket integration debugger
- Generated the document
I have analyzed the handshake headers and server environment. The 400 Bad Request during the Socket.IO upgrade is caused by a mismatch between the client's transport requirements and the staging load balancer's configuration.
WebSocket Diagnostic Report
Debugging Summary
- Connection status: Failed (Handshake)
- Primary suspected issue: Sticky session / Proxy incompatibility
- Confidence: Strongly indicated
- User-visible symptom: Infinite connection retries with 400 errors
- Highest-priority next step: Enable session affinity on the load balancer
Connection & Handshake Audit
| Layer | Observation | Status | Evidence | Recommendation |
|---|---|---|---|---|
| Transport | wss://staging.api.io | OK | Valid TLS cert | No change |
| Handshake | HTTP 400 | FAIL | sid mismatch | Check sticky sessions |
| Headers | Upgrade: websocket | OK | Header present | N/A |
| Gateway | Nginx/ALB | WARN | No session affinity | Enable ip_hash or cookie-based affinity |
Root-Cause Findings
Issue 1 — Missing Session Affinity
- Severity: Blocker
- Confidence: High
Evidence: Socket.IO requires the initial HTTP handshake and the subsequent WebSocket upgrade to hit the same server instance. The logs show the SID generated by Instance A is being sent to Instance B.
- Root Cause: The staging load balancer is using round-robin distribution without sticky sessions.
- Fix: Configure your load balancer (e.g., AWS ALB or Nginx) to use sticky sessions (session affinity).
Validation Test: Attempt a connection and verify the Set-Cookie header is respected in subsequent polling requests.
- Regression Risk: Low; may slightly unevenly distribute load across pods.
Reconnection & Lifecycle Plan
The client is currently stuck in an aggressive retry loop. Once affinity is fixed, ensure the client uses exponential backoff to avoid hammering the gateway during deployment restarts.
Next steps
- Update your Nginx or ALB configuration to enable sticky sessions.
- Verify that the client is not forcing
transports: ['websocket']if the server expects a polling upgrade first. - Check server-side logs for "Unknown transport" or "Session ID unknown" errors to confirm the fix.
websocket-integration-debugger.pdf
PDF · document
Example file from a real run - the skill writes it into your workspace.
Connects securely to your tools. The creator never sees your data.
What you get
About this skill
The problem
Debugging real-time communication is notoriously difficult because state is transient and failures often happen silently during handshakes or reconnection loops. Developers frequently waste hours chasing race conditions, heartbeat failures, or protocol mismatches across the transport layer.
What it does
- Performs a systematic audit of the connection lifecycle from initial TCP handshake to application-level heartbeat.
- Analyzes WebSocket frames and HTTP upgrade headers to identify proxy, TLS, or CORS misconfigurations.
- Maps event-flow timelines to detect out-of-order subscriptions, duplicate listeners, and race conditions.
- Validates JSON schemas and binary payloads against client-server contracts to find serialization errors.
- Generates structured reconnection strategies including backoff logic and state restoration plans.
Frameworks & tools
Browser WebSocket API, Node.js (ws), Socket.IO, React, Next.js, Vue, Go, Python, and Java.
Why this beats prompting it yourself
General LLMs often overlook the nuance between raw WebSockets and abstraction layers like Socket.IO, leading to incorrect advice on headers or event names. This skill enforces a transport-upward debugging methodology that prevents you from fixing application logic when the root cause is actually a proxy timeout or a failed protocol upgrade.
Use cases
- Diagnosing why connections drop exactly 60 seconds after a successful handshake.
- Fixing "403 Forbidden" or "101 Switching Protocols" failures in production environments.
- Auditing complex event-driven state sync in React or Vue applications.
- Designing resilient reconnection logic for unstable mobile network environments.
Known limitations
Requires logs or observed frame data to provide definitive root causes. Does not support bypass of authentication or security protocols.
How to install
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- 1
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- 2
Unzip into your skills folder
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- 3
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