Claudexer

70% cost savings on Claude Code. One command setup.

Claudexer indexes your codebase and auto-injects smart context via Claude Code hooks. Claude knows your code structure before you even ask.

Quick Start

cd your-project
npx claudexer install

That's it. Use Claude Code normally - it's now optimized.

Benchmarks

Tested on a 500+ file NestJS backend:

| Task | Without Claudexer | With Claudexer | Savings | |------|-------------------|----------------|---------| | Simple (health endpoint) | 27s, 6 turns, $0.17 | 19s, 4 turns, $0.11 | 35% | | Complex (new module) | 318s, 41 turns, $1.39 | 82s, 18 turns, $0.42 | 70% |

How It Works

You: "add a price alerts feature"

WITHOUT Claudexer:
  Claude: *reads app.module* *reads prisma schema* *searches services*
          *reads trading.service* *reads another file*...
  → 41 turns, $1.39

WITH Claudexer:
  Hook injects: app.module.ts imports, prisma schema, similar service template
  Claude: *creates all files in one batch*
  → 18 turns, $0.42

The magic: Claudexer shows Claude the exact edit points (where to add imports, where to add models) so it doesn't need to explore.

Features

• Turbo Mode - 2ms hook latency, zero API calls
• Smart Matching - Intent patterns detect "notify when stock drops" → price-alerts
• Prompt Detection - Different context for implement/fix/question prompts
• Auto-Sync - New files get indexed automatically via git diff
• Graceful Fallback - Lists files Claude can read if needed

Commands

npx claudexer install   # One-time setup (indexes + installs hooks)
npx claudexer sync      # Manual re-sync (usually automatic)
npx claudexer status    # Show stats and metrics
npx claudexer uninstall # Remove hooks (keeps index)

What Gets Created

your-project/
├── .claudexer/           # Index files (gitignored)
│   ├── deep-index.json   # Full codebase index
│   ├── key-files.json    # Service/controller templates
│   └── codebase-map.md   # Compressed overview
└── .claude/
    └── hooks/            # Claude Code hooks
        └── claudexer-hook.mjs

Supported Languages

| Language | Support | |----------|---------| | TypeScript/JavaScript | Full | | Dart/Flutter | Full | | Python, Go, Rust | Good | | Java, Kotlin, Swift | Good | | C#, Ruby, PHP | Basic |

Requirements

• Node.js 18+
• Claude Code CLI

How the Savings Work

1. Shows exact edit points - Claude sees where to add imports, not the whole file
2. Provides templates - Similar services shown, Claude copies the pattern
3. Aggressive instructions - "Create ALL files in single batch, no verification needed"
4. Skips exploration - Context is pre-loaded, no file reading needed

License

MIT

Links

• GitHub
• Issues