rtk

<p align="center">
  <img src="https://avatars.githubusercontent.com/u/258253854?v=4" alt="RTK - Rust Token Killer" width="500">
</p>

<p align="center">
  <strong>High-performance CLI proxy that reduces LLM token consumption by 60-90%</strong>
</p>

<p align="center">
  <a href="https://github.com/rtk-ai/rtk/actions"><img src="https://github.com/rtk-ai/rtk/workflows/Security%20Check/badge.svg" alt="CI"></a>
  <a href="https://github.com/rtk-ai/rtk/releases"><img src="https://img.shields.io/github/v/release/rtk-ai/rtk" alt="Release"></a>
  <a href="https://opensource.org/licenses/MIT"><img src="https://img.shields.io/badge/License-MIT-yellow.svg" alt="License: MIT"></a>
  <a href="https://discord.gg/RySmvNF5kF"><img src="https://img.shields.io/discord/1470188214710046894?label=Discord&logo=discord" alt="Discord"></a>
  <a href="https://formulae.brew.sh/formula/rtk"><img src="https://img.shields.io/homebrew/v/rtk" alt="Homebrew"></a>
</p>

<p align="center">
  <a href="https://www.rtk-ai.app">Website</a> &bull;
  <a href="#installation">Install</a> &bull;
  <a href="https://www.rtk-ai.app/guide/troubleshooting">Troubleshooting</a> &bull;
  <a href="ARCHITECTURE.md">Architecture</a> &bull;
  <a href="https://discord.gg/RySmvNF5kF">Discord</a>
</p>

<p align="center">
  <a href="README.md">English</a> &bull;
  <a href="README_fr.md">Francais</a> &bull;
  <a href="README_zh.md">中文</a> &bull;
  <a href="README_ja.md">日本語</a> &bull;
  <a href="README_ko.md">한국어</a> &bull;
  <a href="README_es.md">Espanol</a>
</p>

---

rtk filters and compresses command outputs before they reach your LLM context. Single Rust binary, 100+ supported commands, <10ms overhead.

## Token Savings (30-min Claude Code Session)

| Operation | Frequency | Standard | rtk | Savings |
|-----------|-----------|----------|-----|---------|
| `ls` / `tree` | 10x | 2,000 | 400 | -80% |
| `cat` / `read` | 20x | 40,000 | 12,000 | -70% |
| `grep` / `rg` | 8x | 16,000 | 3,200 | -80% |
| `git status` | 10x | 3,000 | 600 | -80% |
| `git diff` | 5x | 10,000 | 2,500 | -75% |
| `git log` | 5x | 2,500 | 500 | -80% |
| `git add/commit/push` | 8x | 1,600 | 120 | -92% |
| `cargo test` / `npm test` | 5x | 25,000 | 2,500 | -90% |
| `ruff check` | 3x | 3,000 | 600 | -80% |
| `pytest` | 4x | 8,000 | 800 | -90% |
| `go test` | 3x | 6,000 | 600 | -90% |
| `docker ps` | 3x | 900 | 180 | -80% |
| **Total** | | **~118,000** | **~23,900** | **-80%** |

> Estimates based on medium-sized TypeScript/Rust projects. Actual savings vary by project size.

## Installation

### Homebrew (recommended)

```bash
brew install rtk
```

### Quick Install (Linux/macOS)

```bash
curl -fsSL https://raw.githubusercontent.com/rtk-ai/rtk/refs/heads/master/install.sh | sh
```

> Installs to `~/.local/bin`. Add to PATH if needed:
> ```bash
> echo 'export PATH="$HOME/.local/bin:$PATH"' >> ~/.bashrc  # or ~/.zshrc
> ```

### Cargo

```bash
cargo install --git https://github.com/rtk-ai/rtk
```

### Pre-built Binaries

Download from [releases](https://github.com/rtk-ai/rtk/releases):
- macOS: `rtk-x86_64-apple-darwin.tar.gz` / `rtk-aarch64-apple-darwin.tar.gz`
- Linux: `rtk-x86_64-unknown-linux-musl.tar.gz` / `rtk-aarch64-unknown-linux-gnu.tar.gz`
- Windows: `rtk-x86_64-pc-windows-msvc.zip`

> **Windows users**: Extract the zip and place `rtk.exe` somewhere in your PATH (e.g. `C:\Users\<you>\.local\bin`). Run RTK from **Command Prompt**, **PowerShell**, or **Windows Terminal** — do not double-click the `.exe` (it will flash and close). For the best experience, use [WSL](https://learn.microsoft.com/en-us/windows/wsl/install) where the full hook system works natively. See [Windows setup](#windows) below for details.

### Verify Installation

```bash
rtk --version   # Should show "rtk 0.28.2"
rtk gain        # Should show token savings stats
```

> **Name collision warning**: Another project named "rtk" (Rust Type Kit) exists on crates.io. If `rtk gain` fails, you have the wrong package. Use `cargo install --git` above instead.

## Quick Start

```bash
# 1. Install for your AI tool
rtk init -g                     # Claude Code / Copilot (default)
rtk init -g --gemini            # Gemini CLI
rtk init -g --codex             # Codex (OpenAI)
rtk init -g --agent cursor      # Cursor
rtk init --agent windsurf       # Windsurf
rtk init --agent cline          # Cline / Roo Code
rtk init --agent kilocode       # Kilo Code
rtk init --agent antigravity    # Google Antigravity

# 2. Restart your AI tool, then test
git status  # Automatically rewritten to rtk git status
```

The hook transparently rewrites Bash commands (e.g., `git status` -> `rtk git status`) before execution. Claude never sees the rewrite, it just gets compressed output.

**Important:** the hook only runs on Bash tool calls. Claude Code built-in tools like `Read`, `Grep`, and `Glob` do not pass through the Bash hook, so they are not auto-rewritten. To get RTK's compact output for those workflows, use shell commands (`cat`/`head`/`tail`, `rg`/`grep`, `find`) or call `rtk read`, `rtk grep`, or `rtk find` directly.

## How It Works

```
  Without rtk:                                    With rtk:

  Claude  --git status-->  shell  -->  git         Claude  --git status-->  RTK  -->  git
    ^                                   |            ^                      |          |
    |        ~2,000 tokens (raw)        |            |   ~200 tokens        | filter   |
    +-----------------------------------+            +------- (filtered) ---+----------+
```

Four strategies applied per command type:

1. **Smart Filtering** - Removes noise (comments, whitespace, boilerplate)
2. **Grouping** - Aggregates similar items (files by directory, errors by type)
3. **Truncation** - Keeps relevant context, cuts redundancy
4. **Deduplication** - Collapses repeated log lines with counts

## Commands

### Files
```bash
rtk ls .                        # Token-optimized directory tree
rtk read file.rs                # Smart file reading
rtk read file.rs -l aggressive  # Signatures only (strips bodies)
rtk smart file.rs               # 2-line heuristic code summary
rtk find "*.rs" .               # Compact find results
rtk grep "pattern" .            # Grouped search results
rtk diff file1 file2            # Condensed diff
```

### Git
```bash
rtk git status                  # Compact status
rtk git log -n 10               # One-line commits
rtk git diff                    # Condensed diff
rtk git add                     # -> "ok"
rtk git commit -m "msg"         # -> "ok abc1234"
rtk git push                    # -> "ok main"
rtk git pull                    # -> "ok 3 files +10 -2"
```

### GitHub CLI
```bash
rtk gh pr list                  # Compact PR listing
rtk gh pr view 42               # PR details + checks
rtk gh issue list               # Compact issue listing
rtk gh run list                 # Workflow run status
```

### Test Runners
```bash
rtk jest                        # Jest compact (failures only)
rtk vitest                      # Vitest compact (failures only)
rtk playwright test             # E2E results (failures only)
rtk pytest                      # Python tests (-90%)
rtk go test                     # Go tests (NDJSON, -90%)
rtk cargo test                  # Cargo tests (-90%)
rtk rake test                   # Ruby minitest (-90%)
rtk rspec                       # RSpec tests (JSON, -60%+)
rtk err <cmd>                   # Filter errors only from any command
rtk test <cmd>                  # Generic test wrapper - failures only (-90%)
```

### Build & Lint
```bash
rtk lint                        # ESLint grouped by rule/file
rtk lint biome                  # Supports other linters
rtk tsc                         # TypeScript errors grouped by file
rtk next build                  # Next.js build compact
rtk prettier --check .          # Files needing formatting
rtk cargo build                 # Cargo build (-80%)
rtk cargo clippy                # Cargo clippy (-80%)
rtk ruff check                  # Python linting (JSON, -80%)
rtk golangci-lint run           # Go linting (JSON, -85%)
rtk rubocop                     # Ruby linting (JSON, -60%+)
```

### Package Managers
```bash
rtk pnpm list                   # Compact dependency tree
rtk pip list                    # Python packages (auto-detect uv)
rtk pip outdated                # Outdated packages
rtk bundle install              # Ruby gems (strip Using lines)
rtk prisma generate             # Schema generation (no ASCII art)
```

### AWS
```bash
rtk aws sts get-caller-identity # One-line identity
rtk aws ec2 describe-instances  # Compact instance list
rtk aws lambda list-functions   # Name/runtime/memory (strips secrets)
rtk aws logs get-log-events     # Timestamped messages only
rtk aws cloudformation describe-stack-events  # Failures first
rtk aws dynamodb scan           # Unwraps type annotations
rtk aws iam list-roles          # Strips policy documents
rtk aws s3 ls                   # Truncated with tee recovery
```

### Containers
```bash
rtk docker ps                   # Compact container list
rtk docker images               # Compact image list
rtk docker logs <container>     # Deduplicated logs
rtk docker compose ps           # Compose services
rtk kubectl pods                # Compact pod list
rtk kubectl logs <pod>          # Deduplicated logs
rtk kubectl services            # Compact service list
```

### Data & Analytics
```bash
rtk json config.json            # Structure without values
rtk deps                        # Dependencies summary
rtk env -f AWS                  # Filtered env vars
rtk log app.log                 # Deduplicated logs
rtk curl <url>                  # Truncate + save full output
rtk wget <url>                  # Download, strip progress bars
rtk summary <long command>      # Heuristic summary
rtk proxy <command>             # Raw passthrough + tracking
```

### Token Savings Analytics
```bash
rtk gain                        # Summary stats
rtk gain --graph