# Rspack splitChunks

> Diagnose and tune Rspack splitChunks

**Subcategory:** Rstack  
**License:** MIT  
**Source:** https://github.com/rstackjs/agent-skills/blob/1ccaad5ecc44c19baebba0947a9dff05756d9e6c/skills/rspack-split-chunks/SKILL.md

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## When it is useful

Duplicate modules, route over-fetching, cache groups or oversized chunks — diagnosing and tuning Rspack splitChunks.

## The Catch

Skills and tools MIT (ByteDance web-infra). $0 npm, no SaaS — the catch is lock-in to ByteDance's Rust toolchain: webpack-compatible but not 100% (some webpack plugins/loaders don't work). Mostly webpack-shaped knowledge; verify against your real bundle stats, not defaults.