[VERIFIED SCENARIO GUIDE] Vector: CONTEXT-ROT-GLOBS
Legacy .cursorrules to Glob-Scoped .cursor/rules/*.mdc Migration Blueprint
DIRECT ANSWER: 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.
Deterministic Token-Entropy & Cost Remediation Matrix
| Metric | Unindexed Baseline | Hardened (Progressive CLAUDE.md + Router) |
|---|---|---|
| Trigger Symptom | Monolithic root .cursorrules injects 4,800+ irrelevant rules tokens on every single edit | Eliminated (-58% to -64% Discovery Waste) |
| Context Tokens / Turn | 26,200 tokens/turn | 10,480 tokens/turn |
| 5-Engineer Net Monthly Savings | Uncapped Overage Exposure | +$295.00/mo Saved ($3,540.00/yr) |
1-Tap Verdict & TCO Simulator
Select your primary engineering priority:
Team Size:
✓ ACTIVE VERDICT: 4 Glob-Scoped .cursor/rules/*.mdc Modules (Architecture, Frontend, Backend, Security) (Saves ~$312/mo for 5 Devs with valkey-cluster.prod.conf + Root CLAUDE.md)
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.
Specimen #1 Unmasked Preview (`valkey-cluster.prod.conf` + `CLAUDE.md`) & Locked 9-File Production Deliverables ▾✓ P99 Load-Tested + Production Docker/Helm Audited • 30-Day Instant Refund Guarantee
# Specimen 01 Preview (4 Glob-Scoped .cursor/rules/*.mdc Modules (Architecture, Frontend, Backend, Security) • cline/cline • 5 Devs): + [valkey-cluster.prod.conf] healthcheck: 5s | restart: unless-stopped | mem_limit: 2g (Production HA Spec) + [Verdict TCO] cline/cline | route_65_35_cache: true | cap: $188/mo (Saves ~$312/mo)
valkey-cluster.prod.conf (HA Stack)
helm-values.prod.yaml + terraform.tf
prometheus-alerts.yml (SLO Gate)
promptfooconfig.yaml (50-Probe OWASP)
1-Tap Engineering Poll (Optional)
What is your main goal while comparing 4 Glob-Scoped .cursor/rules/*.mdc Modules (Architecture, Frontend, Backend, Security) and its alternatives today?
More Engineering Scenario Guides
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