Rebase onto origin/main surfaced runbooks/home-assistant-maintenance.md (W1N-69) which predated the runbook reorg. Add Purpose/Scope/Safety headers and add it to the README routing index (now 17/17 consistent).
- RUNBOOKS.md: repo-level spec (six-field model, naming, safety, maturity path) - runbooks/_template.md + README.md: standard template and 16-entry routing index - new: issue-to-merge, fix-ci, release, rollback, network-change, network-recovery - light-enhance 10 existing runbooks with Purpose/Scope/Safety headers - AGENTS.md: point step 3 at index/spec, add runbook execution rules - docs/agent-runbook-guide.md: archive of Manus AI guide