name: TanStack Start description: | Build full-stack React applications with TanStack Start on Cloudflare Workers. Type-safe routing, server functions, SSR/streaming, and seamless D1/KV/R2 integration.

Use when: building full-stack React apps, need SSR with Cloudflare Workers, want type-safe server functions, or migrating from Next.js.

RC status - v1.0 stable pending. Monitor tanstack/router#5734 (memory leak) before production use. allowed-tools: [Bash, Read, Write, Edit]

TanStack Start Skill [DRAFT - NOT READY]

⚠️ Status: Release Candidate - Monitoring for Stability

This skill is prepared but NOT published. Waiting for:

• ⏸️ v1.0 stable release (currently RC v1.145.3 as of 2026-01-03)
• ❌ GitHub #5734 resolved (memory leak with TanStack Form - STILL OPEN, last activity Nov 20, 2025, related PR tanstack/form#1866)
• ⏸️ Critical bugs stabilization period
• ⏸️ Template/reference content creation

Current Package: @tanstack/react-start@1.145.3 (Jan 2026)

DO NOT USE IN PRODUCTION YET - RC status, active memory leak issue

Issue #5734 Summary: Memory leak when using TanStack Form with TanStack Start. Pages with forms leak memory on repeated loads, causing server crashes (~30 min). Heap snapshots show retained object references preventing GC.

Skill Overview

TanStack Start is a full-stack React framework with:

• Client-first architecture with opt-in SSR
• Built on TanStack Router (type-safe routing)
• Server functions for API logic
• Official Cloudflare Workers support
• Integrates with TanStack Query

When v1.0 Stable

This skill will provide:

• Cloudflare Workers + D1/KV/R2 setup
• Server function patterns
• SSR vs CSR strategies
• Migration guide from Next.js
• Known issues and solutions

Monitoring

Track stability at: planning/stability-tracker.md

Check weekly:

• Package: npm view @tanstack/react-start version
• TanStack Start Releases
• Issue #5734 - Memory leak blocker

Installation (When Ready)

npm create cloudflare@latest -- --framework=tanstack-start

Last Updated: 2026-01-03 RC Announced: September 22, 2025 Expected Stable: Pending issue #5734 resolution + final RC feedback Monitoring: Issue #5734 still open (last activity Nov 20, 2025). Related PR #1866 in TanStack Form repo.