fix(engineering): address Claude Code review findings

- performance-profiler: add Quick Start section with script usage examples
- interview-system-designer: fix references to match actual filenames

engineering/interview-system-designer/SKILL.md

@@ -40,9 +40,9 @@ python3 scripts/interview_planner.py --role "Product Manager" --level mid --json
 ## References
 
 - `references/interview-frameworks.md`
-- `references/interview_calibration_guide.md`
-- `references/behavioral_interview_framework.md`
-- `references/technical_assessment_patterns.md`
+- `references/bias_mitigation_checklist.md`
+- `references/competency_matrix_templates.md`
+- `references/debrief_facilitation_guide.md`
 
 ## Common Pitfalls
 

engineering/performance-profiler/SKILL.md

@@ -37,6 +37,21 @@ Systematic performance profiling for Node.js, Python, and Go applications. Ident
 
 ---
 
+## Quick Start
+
+```bash
+# Analyze a project for performance risk indicators
+python3 scripts/performance_profiler.py /path/to/project
+
+# JSON output for CI integration
+python3 scripts/performance_profiler.py /path/to/project --json
+
+# Custom large-file threshold
+python3 scripts/performance_profiler.py /path/to/project --large-file-threshold-kb 256
+```
+
+---
+
 ## Golden Rule: Measure First
 
 ```bash