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Get Started Free →A skill whose frontmatter declares the same key twice so YAML keeps only the last. Use when testing duplicate-key detection.
| Test case | Without → With | Effect | Δ tokens | Δ turns |
|---|---|---|---|---|
| case-05 | ✗→✓ | ▲ Improved | -12% | 0% |
| case-08 | ✗→✓ | ▲ Improved | -27% | 0% |
| case-12 | ✗→✓ | ▲ Improved | -14% | 0% |
| case-10 | ✓→✗ | ▼ Worse | -34% | 0% |
| case-03 | ✓→✓ | ＝ Same ✓ | 22% | 0% |
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