omni-compression

omni-compression is a skill for Claude Code, Codex from diegosouzapw/OmniRoute. It costs 42 tokens per session (1,714 once invoked), scanned A, original, MIT.

A prompt-compression tool that shortens command output and prose before it is sent to an AI model. It supports RTK, Caveman, and combined compression modes, with language packs and custom rules.

In plain words
What is it for?
Use it to configure compression modes, manage language packs and rules, and preview compressed prompts or other message payloads.
Why use it?
It helps reduce the amount of text an AI model must process, which can make large prompts more manageable. You can preview how a message will be compressed before using it.

Skill for Claude CodeCodex

About the project

OmniRoute is an AI gateway that gives coding agents one endpoint for accessing models from many providers, with quota-aware fallback between them. It is for people using Claude Code, Codex, Cursor, OpenCode, Cline, Copilot, and similar tools who want a single route to their available AI models.

diegosouzapw/OmniRoute · 59,841 stars · on GitHub

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/diegosouzapw/omniroute/omni-compression
Any agent
npx skills add diegosouzapw/OmniRoute --skill omni-compression
Clone the repo
git clone --depth 1 https://github.com/diegosouzapw/OmniRoute

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for omni-compression

README.md
[![agentmods](https://agentmods.dev/badge/skills/diegosouzapw/omniroute/omni-compression.svg)](https://agentmods.dev/skills/diegosouzapw/omniroute/omni-compression)
Your own site
<a href="https://agentmods.dev/skills/diegosouzapw/omniroute/omni-compression"><img src="https://agentmods.dev/badge/skills/diegosouzapw/omniroute/omni-compression.svg" alt="Measured on agentmods" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,714 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00042 $0.01714
Opus 5 $0.00021 $0.00857
Sonnet 5 $0.00008 $0.00343
Haiku 4.5 $0.00004 $0.00171

Measured 2d ago against content hash 921ff9455c5d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

omni-compression scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -X POST https://localhost:20128/api/compression/preview \
Origin

Copies of this mod

1 near-identical copy found in the catalogue:

skills/omni-compression/SKILL.md · 222 lines

How it starts

The opening of the file, as written. The whole thing — 222 lines — stays where its author put it; the contents beside it link to each section on GitHub.

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

curl -X POST https://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

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

GET /api/compression/rules

List Caveman compression rule metadata

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

POST /api/compression/compare

POST compression › compare

curl -X POST https://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

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

GET /api/compression/engines

GET compression › engines

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

POST /api/compression/retrieve

POST compression › retrieve

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

Read the full file on GitHub · 222 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago Changed · +42 lines 921ff9455c5d
  2. 5d ago First seen · 180 lines · 42 tokens per session scan A c6d2ad054b54

Subscribe to this mod's changes

omni-compression is a skill published in the GitHub repository diegosouzapw/OmniRoute (59,841 stars, last pushed 2d ago), licensed MIT. It adds 42 tokens to every session and 1,714 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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