**Canonical index:** [03-deployment/OPERATIONAL_RUNBOOKS.md](03-deployment/OPERATIONAL_RUNBOOKS.md) — use that document as the master index of every runbook (Besu, CCIP, Blockscout, maintenance, liquidity, network, etc.).
This file exists for backward compatibility with links that point to `RUNBOOKS_MASTER_INDEX.md`. All content and links are maintained in [03-deployment/OPERATIONAL_RUNBOOKS.md](03-deployment/OPERATIONAL_RUNBOOKS.md).