LLM rules exceed Cursor's 500-line guideline and use overly broad globs

[Panimaster]

Which project does this relate to?

Router

Describe the bug

The llms rules from @tanstack/react-router are too large and use broad globs, which fills Cursor’s context when working in src/.

Rule size: some files up to 10k lines (e.g. .cursor/rules/tanstack-react-router_guide.mdc). Cursor recommends keeping rules under 500 lines.

Globs: All rules use globs: src//*.ts,src//*.tsx. Cursor support confirmed that when globs are set, rules load whenever matching files are in context, regardless of alwaysApply. So editing any file in src/ loads all five rules (~25k–40k tokens).

Impact: Context is dominated by rules, responses slow down, and many users remove the integration (Discussion #5179).

Your Example Website or App

https://github.com/Panimaster/github-eqx2dktt

Steps to Reproduce the Bug or Issue

Clone the repo (link above).
Run npx vibe-rules install cursor.
Open any file in src/ in Cursor and start a chat — all rules load into context.

Expected behavior

Rules stay under ~500 lines each.

Screenshots or Videos

No response

Platform

• Router: 1.167.3
• Editor: Cursor

Additional context

No response