Steps can now declare their own expansion using the Expand field:
steps:
- id: design
expand: rule-of-five
expand_vars:
iterations: 3
This is more convenient than compose.expand for single-step expansions.
The step is replaced by the expansion template with variables substituted.
Reuses existing expandStep() and mergeVars() from gt-8tmz.34.
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>