# Legacy .cursorrules to Glob-Scoped .cursor/rules/*.mdc Migration Blueprint

> **Direct Answer (October 2026 Verified Scenario)**: Splitting a legacy root .cursorrules into 4 path-scoped .cursor/rules/*.mdc files (alwaysApply: false with explicit globs) reduces prompt overhead by 60.0% and prevents cross-stack hallucination.

- **Canonical URL**: https://pulse-forge.io/scenario/cursor-rules-mdc-migration-from-legacy-cursorrules
- **Download Free Starter CLAUDE.md ($0)**: https://pulse-forge.io/api/launch-kit/free-claude-md?repo=cline/cline
- **1-Click $4.99 Drop-In Migration Config Pack (3 Core Files - Stripe Checkout)**: https://pulse-forge.io/buy/micro_pass?repo=cline/cline&source=md_scenario
- **1-Click $9.99 Complete 9-File Production Config .ZIP (Stripe Checkout)**: https://pulse-forge.io/buy/repo_pass_999?repo=cline/cline&source=md_scenario_999
- **1-Click $49 Verified Leaderboard Boost (Stripe Checkout)**: https://pulse-forge.io/buy/instant_boost?repo=cline/cline&source=md_scenario_49
- **Trigger Symptom**: Monolithic root .cursorrules injects 4,800+ irrelevant rules tokens on every single edit
- **Root Cause**: Legacy root .cursorrules loads frontend, backend, database, and CI instructions into every prompt regardless of which file is open.
- **Baseline Context Tokens/Turn**: `26,200` -> **Hardened**: `10,480` (`-58%`)
- **5-Engineer Monthly Savings**: `$295.00/mo`
- **Recommended Reference Repo**: `cline/cline` (https://pulse-forge.io/launch-kit?repo=cline/cline)