db-core

name	db-core
description	TanStack DB core concepts: createCollection with queryCollectionOptions, electricCollectionOptions, powerSyncCollectionOptions, rxdbCollectionOptions, trailbaseCollectionOptions, localOnlyCollectionOptions. Live queries via query builder (from, where, join, select, groupBy, orderBy, limit). Optimistic mutations with draft proxy (collection.insert, collection.update, collection.delete). createOptimisticAction, createTransaction, createPacedMutations. Entry point for all TanStack DB skills.
type	core
library	db
library_version	0.6.0

TanStack DB — Core Concepts

TanStack DB is a reactive client-side data store. It loads data into typed collections from any backend (REST APIs, sync engines, local storage), provides sub-millisecond live queries via differential dataflow, and supports instant optimistic mutations with automatic rollback.

Framework packages (@tanstack/react-db, @tanstack/vue-db, @tanstack/svelte-db, @tanstack/solid-db) re-export everything from @tanstack/db plus framework-specific hooks. In framework projects, import from the framework package directly. @tanstack/angular-db is the exception -- import operators from @tanstack/db separately.

Sub-Skills

Need to...	Read
Create a collection, pick an adapter, add schema	db-core/collection-setup/SKILL.md
Query data with where, join, groupBy, select	db-core/live-queries/SKILL.md
Insert, update, delete with optimistic UI	db-core/mutations-optimistic/SKILL.md
Build a custom sync adapter	db-core/custom-adapter/SKILL.md
Persist collections to SQLite (offline cache)	db-core/persistence/SKILL.md
Preload collections in route loaders	meta-framework/SKILL.md
Add offline transaction queueing	offline/SKILL.md (in @tanstack/offline-transactions)

For framework-specific hooks:

Framework	Read
React	react-db/SKILL.md
Vue	vue-db/SKILL.md
Svelte	svelte-db/SKILL.md
Solid	solid-db/SKILL.md
Angular	angular-db/SKILL.md

Quick Decision Tree

• Setting up for the first time? → db-core/collection-setup
• Building queries on collection data? → db-core/live-queries
• Writing data / handling optimistic state? → db-core/mutations-optimistic
• Using React hooks? → react-db
• Preloading in route loaders (Start, Next, Remix)? → meta-framework
• Building an adapter for a new backend? → db-core/custom-adapter
• Persisting collections to SQLite? → db-core/persistence
• Need offline transaction persistence? → offline

Version

Targets @tanstack/db v0.6.0.