Author deterministic check attempt 1: FAIL in verification harness. Arbitrary markup length >100 rejected intentionally minimal splash markup. No product transition failure was observed at this point. Replaced arbitrary length threshold with non-empty markup check.
Initial shell command node --check: node not in PATH (exit 127). Used existing /home/agentagency-dev/.local/node-v24.21.0/bin/node; no install.
