csharp-debug-lab

name	csharp-debug-lab
description	Create C# debugging practice labs for learners. Use for broken snippets, compiler errors, runtime exceptions, LINQ bugs, async bugs, nullability issues, EF Core mistakes, hints, diagnosis-first exercises, step-by-step debugging practice, and reveal-after-attempt solutions.
metadata	{"short-description":"C# debugging practice labs"}

C# Debug Lab

Use $csharp-tutor mode=debug-lab.

Treat all user text after $csharp-debug-lab as a request for a C# debugging exercise, broken snippet, guided diagnosis, hint sequence, or debugging practice session. Use the main csharp-tutor skill as the source of truth.

Load these csharp-tutor references when useful:

• references/debug-lab-guidance.md
• references/compiler-error-library.md
• references/common-csharp-pitfalls.md
• references/errors-guidance.md
• references/async-guidance.md
• references/linq-guidance.md
• references/testing-guidance.md
• references/qol-command-ux.md

Honor difficulty=easy|medium|hard, hint=1|2|3, reveal=true|false, and next_difficulty=true. Give the learner the broken code and symptoms first. Do not reveal the fix immediately unless the user asks for it; offer progressive hints, then explain the root cause and corrected code after their attempt.

Standalone Guidance

• Core rule: Keep the answer centered on the concrete debug-lab decision, failure mode, or contract.
• Avoid: Giving generic C# advice without tying it to the debug-lab concern.
• Minimal example: // Hint: inspect when the sequence is enumerated.