docs/construction-plan-format.md: one file per plan (plans/<id>.md),
frontmatter status tracker (draft -> reviewed -> approved -> built ->
catalogued, the phase-4 hard gate), six body sections threading all
four phases through one document.
Proven against real demand: plans/rein-openweights-openrouter-approle.md,
phases 1-2 filled in. Found and reasoned through a real existing-structure
question along the way -- the openrouter-llm-connect catalog lane could
technically be reused, but its auth_method is interactive-caller-shaped
and its policy is shared/high-risk; recommends a dedicated, narrowly
scoped AppRole instead, same reasoning agent-harness-binky-mail used for
its own dedicated lane.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
