---
art: bug
order: 8
track: Investigation
level: 2
summary: Isolate a problem’s cause or contribute a tested fix.
---

# Problem solver

<x-club-badge />

**Investigation · Level 2**

**How to earn it:** Isolate a problem’s cause or contribute a tested fix.

**Evidence:** Link the investigation or fix and its verification. Mark reviews the work and awards the badge with a short note.

**Suggested next:** [Debugging partner](./debugging-partner.badge.md)

These milestones recognize demonstrated capability. They do not unlock account
permissions, require points, or force projects into a fixed sequence.

[All badges](../index.md#badges)