Implements the schema and validation for runtime dynamic expansion:
- Add OnCompleteSpec type for step completion triggers
- Add on_complete field to Step struct
- Validate for_each path format (must start with "output.")
- Validate bond is required with for_each (and vice versa)
- Validate parallel and sequential are mutually exclusive
- Add cloneOnComplete for proper step cloning
- Add comprehensive tests for parsing and validation
The runtime executor (in gastown) will interpret these fields to:
- Bond N molecules when step completes based on output.collection
- Run bonded molecules in parallel or sequential order
- Pass item/index context via vars substitution
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
a42fac8cb9