Recent phases wrote STATUS/BACKLOG/REVIEW/JOURNAL to the repo ROOT because
build_kickoff + plan.md's tree used bare filenames, even though the loops'
AGENTS.md + INBOX/DECISIONS/DEFERRED conventions already said machine-docs/.
Make machine-docs/ the single mandated home everywhere: build_kickoff now
emits machine-docs/ paths + an explicit FILE-LOCATION RULE; both loop prompts
and plan.md (tree + seed step) updated; orchestrator AGENTS.md documents +
enforces it. resolve_state/INBOX handoff already read machine-docs/ first.
e144354668