How-ToDevelopersOctober 21, 2026

Vanguard cut cash-ledger research from 7 days to 15 minutes via MCP

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Gareth Yoder, who leads Vanguard's cash program, exposed the legacy codebase to AI tools through an MCP server, cutting research time from 7 days to 15 minutes. The ledger handles up to 30 million calls a day, with data, producer and consumer migrations run in parallel.

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