docs: add a database connections guide for tasks#3881
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Where to create the client, how to size the pool against each provider's connection limit, when to use a pooler, and how to release connections at waits. Covers node-postgres, Prisma, Drizzle, and MongoDB, and is linked from the chat agent docs.
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WalkthroughThis PR adds a new database-connections.mdx guide with recommendations for module-scoped clients/pools, pool sizing, pooler usage, private DB connectivity, provider notes, releasing connections during waits, chat-agent patterns, examples, and troubleshooting. It registers the page in docs.json, adds a "Database connections" card to the AI chat overview, and updates onBoot/chat-local/database-persistence docs to reference the new guide. All edits are documentation-only. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
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Summary
A new guide for connecting a database to your tasks: where to create the client, how to size the connection pool against your provider's limit, when to reach for a pooler, and how to release connections at waits so you don't hit "too many connections" or crash on resume.
It covers node-postgres, Prisma, Drizzle, and MongoDB, with researched direct and pooled connection limits for the common Postgres providers (Supabase, Neon, RDS, PlanetScale) and MongoDB Atlas. The page lives under Documentation, Troubleshooting, and is linked from the chat agent docs (overview, lifecycle hooks, chat.local, and the database persistence pattern).