Express Ideation

Express is a pre-commit of /ideation's post-interview routing — same interview, same critics, same artifacts (contract-data.json, specs, generator-rendered contract.html + contract.md via --md-output); the only difference is that the express finish is chosen here, up front, instead of at the routing question.

1. Clean-tree check — now, before the interview. Run git status --porcelain. Uncommitted changes would ride along on phase commits, and stopping costs one question here, not a completed interview. Dirty tree → ask: stash/commit first, accept the risk, or abort. A clean tree proceeds silently.
2. Run ideation. Read and follow ${CLAUDE_PLUGIN_ROOT}/skills/ideation/SKILL.md end to end with the routing question pre-answered to "Approve — express finish" (fold the run-mode question into the approval call, and skip the routing-time clean-tree check — it already ran above). Everything else — branch handling, resume semantics, strict fail-closed execution, completion lines — lives in ideation's Express finish path, the single owner of express semantics.
3. Scope guard (advisory). For exploratory or unfamiliar work, recommend the full /ideation flow instead — its evidence-derived routing recommendation makes the same call, with reasons.