build-cache-analyzer

Claude Code plugin that analyzes build cache hit rates across CI runs, finds what's busting your cache, and optimizes build times.

Supports Turborepo, Nx, Webpack, Vite, Next.js, and Gradle.

Install

claude plugin install build-cache-analyzer

Commands

Command	Description
/cache-analyze	Analyze current cache state and hit rates
/cache-optimize	Get specific fix suggestions for your build config
/cache-report	Weekly/monthly efficiency report with cost estimates

Example Report

Cache Analysis Results

Overall Hit Rate: 73.2%

Tasks with worst hit rates:
  build:app   45.0%  (9 hits / 20 runs)
  test:unit   62.5% (10 hits / 16 runs)
  lint        89.0% (17 hits / 19 runs)

Top 10 cache-busting files:
  package-lock.json    18 changes → 15 misses
  src/utils/shared.ts  12 changes → 12 misses
  .env.production       8 changes →  8 misses

Cache Optimization Recommendations

HIGH IMPACT (+25% hit rate):
  1. Narrow turbo.json build.inputs from ["**/*"] to ["src/**", "tsconfig.json"]
  2. Create .nxignore — docs/ changes causing 34% of all misses

Run /cache-optimize --apply to write these fixes.

Skills

• cache-analyze — detects build system, parses cache logs, identifies busters
• cache-optimize — audits inputs/outputs config, detects non-determinism, generates fixes
• cache-report — weekly/monthly report with CI minute savings and cost estimates