What problem does it solve? When a chat agent behaves unexpectedly—running slowly, skipping tools, failing to load instructions or skills, or producing surprising responses—users have no visibility into why. This Skill investigates the underlying debug logs to find evidence-based root causes instead of guessing. ## Core Features & Use Cases - Log-Based Root Cause Analysis: Parses session debug logs (main.jsonl, system prompts, tool definitions, subagent traces) to explain latency, tool failures, and model behavior. - Discovery Diagnostics: Identifies why instruction, skill, or agent files failed to load, including name mismatches and folder resolution issues. - Network Diagnostics: Runs the Copilot diagnostics command to check authentication, proxy, and connectivity when logs suggest network failures. - Use Case: A user asks why their custom skill never loaded. The Skill searches the session log, finds a name mismatch between the folder and SKILL.md frontmatter, and provides the exact fix. ## Quick Start Ask the agent why your last chat request was slow or why a specific tool was not called, and it will analyze the session debug logs to explain what happened.