Debugging

Match each RAG failure symptom to the pipeline layer to investigate first

Walk through LangGraph time travel debugging via the checkpointer

Pick the most likely cause when training loss drops for 1k steps, plateaus for 2k, then drops again at step 3k

Loss spikes the moment warmup ends: which hyperparameter is the prime suspect?

Pick the three first things to check when LoRA training loss sits flat from step 0

Your MCP server builds but the host can't see its tools. What's the first debugging move?

Design an observability and debugging system for a production multi-agent application with 5+ collaborating agents.

A chatbot team reports TTFT P99 jumped from 300ms to 1.4s overnight. Which root cause is most likely?

What traces and metrics do you need to debug a P99 TTFT regression in production LLM serving?

Spot the error in this Claude Desktop MCP server configuration

Spot the bug revealed by JSON-RPC tracing in this MCP exchange

What is a common bug that JSON-RPC tracing reveals in MCP server implementations?

Spot the error in this MCP JSON-RPC request

How would you use mcp-inspector to debug a tools/call that returns unexpected output?

Explain the LLM vs runtime split in an agent and why the distinction matters for debugging