Paths: File paths (shared/, references/, ../ln-*) are relative to skills repo root. If not found at CWD, locate this SKILL.md directory and go up one level for repo root.

Regression Checker

Runs the existing test suite to ensure no regressions after implementation changes.

Purpose & Scope

• Detect test framework (pytest/jest/vitest/go test/etc.) and test dirs.
• Execute full suite; capture results for Story quality gate.
• Return PASS/FAIL with counts/log excerpts; never modifies Linear or kanban.

When to Use

• Invoked by ln-510-quality-coordinator Phase 7
• Code quality check passed