# Prompt and Output Compression

Configures command, prose and stacked compression, reducing token use by 60 to 90 percent.

- Repository: https://github.com/cheaper-inference/OmniRoute (83611 stars)
- Category: AI and agents
- License: MIT
- Last updated: 2026-11-01
- Runs scripts: no, instructions only

## Install

Claude Code: `npx skills add cheaper-inference/OmniRoute --skill omni-compression -g -a claude-code -y`
Codex: `npx skills add cheaper-inference/OmniRoute --skill omni-compression -g -a codex -y`
Cursor: `npx skills add cheaper-inference/OmniRoute --skill omni-compression -g -a cursor -y`
Gemini CLI: `npx skills add cheaper-inference/OmniRoute --skill omni-compression -g -a gemini-cli -y`

## Description

Configure RTK (command output), Caveman (prose), and stacked compression modes. Manage language packs, custom rules, and test prompt compression reducing tokens by 60, 90%.

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

<!-- generated by src/lib/agentSkills/generator.ts; manual edits will be overwritten -->

## Overview

Configure RTK (command output), Caveman (prose), and stacked compression modes. Manage language packs, custom rules, and test prompt compression reducing tokens by 60, 90%.

## Authentication

All requests require a valid Bearer token or session cookie. Obtain a token via `POST /api/auth/login` or configure `REQUIRE_API_KEY=false` for local development.

## Endpoints

### POST /api/compression/preview

Preview compression for a message payload

```bash
curl -X POST http://localhost:20128/api/compression/preview \
  -H "Authorization: Bearer $OMNIROUTE_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{}'
```

### GET /api/compression/language-packs

List Caveman compression language packs

```bash
curl http://localhost:20128/api/compression/language-packs \
  -H "Authorization: Bearer $OMNIROUTE_TOKEN"
```

### GET /api/compression/rules

List Caveman compression rule metadata

```bash
curl http://localhost:20128/api/compression/rules \
  -H "Authorization: Bearer $OMNIROUTE_TOKEN"
```

### POST /api/compression/compare

POST compression › compare

```bash
curl -X POST http://localhost:20128/api/compression/compare \
  -H "Authorization: Bearer $OMNIROUTE_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{}'
```

### POST /api/compression/compare/verify

POST compression › compare › verify

```bash
curl -X POST http://localhost:20128/api/compression/compare/verify \
  -H "Authorization: Bearer $OMNIROUTE_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{}'
```

### GET /api/compression/engines

GET compression › engines

```bash
curl http://localhost:20128/api/compression/engines \
  -H "Authorization: Bearer $OMNIROUTE_TOKEN"
```

### POST /api/compression/retrieve

POST compression › retrieve

The rest: https://github.com/cheaper-inference/OmniRoute/blob/HEAD/skills/omni-compression/SKILL.md