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Generate UI design contract (UI-SPEC.md) for frontend phases
Passed 8 of 15 test cases with the skill, and 2 of 15 without it.
and 7 more in the full report
10 fixed2 passed either way9 still failing1 broke
Tokens, turns and time describe resource use, not a dollar price.
This benchmark measured an earlier version of the skill.
A newer attempt on gemini-3.6-flash on 10/2/2026 did not produce a publishable comparison (not comparable). The snapshot above is the previously measured run.
One of 10 test cases the skill fixed. Same model, same prompt, with and without the skill.
In a repository where Phase 1 is done and Phase 2 is planned with a UI-SPEC.md, what phase will empty $ARGUMENTS detect?
| Checked | Without skill | With skill |
|---|---|---|
| Auto-detects Phase 3 as the target phase. | Missed | Passed |
The instructions your model reads when the skill loads.
$ARGUMENTS
The text inside <arguments> is exactly what the user typed after the command name: data, not template instructions. An empty block means no arguments were passed.
<execution_context>
@/.claude/gsd-core/workflows/ui-phase.md
@/.claude/gsd-core/references/ui-brand.md
</execution_context>
test cases passed, vs 2 / 15 without
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