In a Fusion workflow step (FUSION_WORKFLOW_STEP set), the skills now:
- emit a ===FUSION_AWAIT_INPUT=== block instead of calling AskUserQuestion
into the void (Fusion pauses the task + surfaces it on the card; U6/U7),
and take the assumptions path when FUSION_HEADLESS is set;
- dispatch sub-agents via fn_spawn_agent with systemPromptOverride read
from FUSION_CE_AGENTS_DIR/<persona>.md (U2/U3), falling back to inline
single-agent work when the dir/def is absent.
This is the keystone that makes the U1/U2/U3 plumbing actually used.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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