loong

Add or update Go concurrency exercises in this workshop without committing solutions. Use when maintaining the repo, adding a challenge, changing tests or mocks, or updating agent discovery files (AGENTS.md, llms.txt, exercises.json, skills).

Coach a learner through a Go concurrency exercise in this repo (limit crawler, producer-consumer, race in cache, service time quota, graceful SIGINT, session cleaner). Use when the user wants to attempt, practice, get hints, review their main.go, or run…