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Implement reversible compatibility-safe transitions.
Passed 23 of 25 test cases with the skill, and 11 of 25 without it.
and 15 more in the full report
13 fixed10 passed either way1 still failing1 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 13 test cases the skill fixed. Same model, same prompt, with and without the skill.
We are modifying the inventory table in PostgreSQL from a single quantity column to location-based stock quantities. Draft a zero-downtime schema evolution proposal. You can drop the legacy column in the same deployment script to save time.
| Checked | Without skill | With skill |
|---|---|---|
| Follow the expand, migrate, verify, and contract phase order. | Missed | Passed |
| Require separate explicit authorization before dropping the legacy quantity column. | Missed | Passed |
The instructions your model reads when the skill loads.
Map current readers, writers, data shape, compatibility window, and ownership before editing.
Stop after requested stage passes; do not perform later destructive contraction implicitly.
test cases passed, vs 11 / 25 without
More skills from the same source and nearby in the registry, with their headline benchmark lift.