omni-compression

Q: How do I install omni-compression?

Run npx skills add https://github.com/cheaper-inference/omniroute --skill omni-compression in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/omni-compression/ (personal) or .claude/skills/omni-compression/ (project).

by cheaper-inferenceAI & Agents

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

Installs: 1K
Last 24h: +22
Trending rank: #5370
Security: Not audited

Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/cheaper-inference/omniroute --skill omni-compression

01
Install
Run the command in your project. The CLI asks which agents to install for.
02
Describe the task
Ask your agent for something this skill covers. It loads omni-compression automatically when relevant.
03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

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 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

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

GET /api/compression/rules

List Caveman compression rule metadata

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

POST /api/compression/compare

POST compression › compare

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

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

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

POST /api/compression/retrieve

POST compression › retrieve

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

Payloads

See the full OpenAPI specification at GET /api/openapi/spec or docs/openapi.yaml for detailed request/response schemas.

OmniRoute — Compression

Requires OMNIROUTE_URL and OMNIROUTE_KEY. See entry-point SKILL for setup.

Overview

OmniRoute compresses token payloads before forwarding to providers. No code changes required — set it once, it applies to all requests transparently.

Engine	Best for	Typical savings
RTK	Terminal / build / test / git output	60–90%
Caveman	Human prose, chat history	46% input
Stacked (`rtk → caveman`)	Mixed coding sessions	78–95%
MCP accessibility filter	Browser/accessibility tool results	60–80%

Get current settings

curl $OMNIROUTE_URL/api/settings/compression \
  -H "Authorization: Bearer $OMNIROUTE_KEY"

Enable RTK (best for coding agents)

curl -X PUT $OMNIROUTE_URL/api/settings/compression \
  -H "Authorization: Bearer $OMNIROUTE_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "mode": "rtk", "enabled": true }'

Enable stacked mode (maximum savings)

curl -X PUT $OMNIROUTE_URL/api/settings/compression \
  -H "Authorization: Bearer $OMNIROUTE_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "mode": "stacked",
    "enabled": true,
    "stackedPipeline": ["rtk", "caveman"]
  }'

Enable Caveman (prose / chat)

curl -X PUT $OMNIROUTE_URL/api/settings/compression \
  -H "Authorization: Bearer $OMNIROUTE_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "mode": "standard", "enabled": true }'

Caveman intensities: lite (safe), standard (balanced), aggressive (long sessions), ultra (context recovery).

Preview compression before enabling

curl -X POST $OMNIROUTE_URL/api/compression/preview \
  -H "Authorization: Bearer $OMNIROUTE_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "mode": "rtk",
    "text": "$ npm test\n> jest\n\nPASS src/a.test.ts (2.1s)\nPASS src/b.test.ts (1.8s)\n..."
  }'

Response includes compressed, original_length, compressed_length, savings_pct.

MCP accessibility-tree filter (browser agent use)

When OmniRoute is used with browser/Playwright MCP tools, it automatically compresses verbose accessibility-tree tool results. Enabled by default; configure thresholds:

curl -X PUT $OMNIROUTE_URL/api/settings/compression \
  -H "Authorization: Bearer $OMNIROUTE_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "mcpAccessibility": {
      "enabled": true,
      "collapseThreshold": 30,
      "maxTextChars": 50000
    }
  }'

collapseThreshold: collapse sibling lines when ≥ N repeats (default 30).
maxTextChars: hard truncate after N chars with navigation hint (default 50000).

Language packs (Caveman)

Caveman supports language-aware rules for pt-BR, es, de, fr, ja:

curl -X PUT $OMNIROUTE_URL/api/settings/compression \
  -H "Authorization: Bearer $OMNIROUTE_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "mode": "standard",
    "cavemanConfig": {
      "language": "pt-BR",
      "autoDetectLanguage": true
    }
  }'

Via MCP

omniroute_compression_status     → current settings + savings analytics
omniroute_compression_configure  → update mode/threshold/language
omniroute_set_compression_engine → switch engine at runtime

Disable compression

curl -X PUT $OMNIROUTE_URL/api/settings/compression \
  -H "Authorization: Bearer $OMNIROUTE_KEY" \
  -d '{ "enabled": false }'

Errors

400 invalid mode → use off, lite, standard, aggressive, ultra, rtk, or stacked
400 invalid stackedPipeline → array must contain valid engine ids (rtk, caveman)

FAQ

What does the omni-compression skill do?

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

How do I install omni-compression?

Run npx skills add https://github.com/cheaper-inference/omniroute --skill omni-compression in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/omni-compression/ (personal) or .claude/skills/omni-compression/ (project).

Which AI agents can use omni-compression?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is omni-compression safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains omni-compression?

It is published by cheaper-inference in cheaper-inference/omniroute. It has 1,033 recorded installs.

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omni-compression

Install

Install

Describe the task

Review the result

SKILL.md

Overview

Authentication

Endpoints

POST /api/compression/preview

GET /api/compression/language-packs

GET /api/compression/rules

POST /api/compression/compare

POST /api/compression/compare/verify

GET /api/compression/engines

POST /api/compression/retrieve

Payloads

OmniRoute — Compression

Overview

Get current settings

Enable RTK (best for coding agents)

Enable stacked mode (maximum savings)

Enable Caveman (prose / chat)

Preview compression before enabling

MCP accessibility-tree filter (browser agent use)

Language packs (Caveman)

Via MCP

Disable compression

Errors

FAQ

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