routelabs-router 0.1.2

A local-first inference control plane for hybrid LLM routing.

RouteLabs Router

RouteLabs Router is a local-first runtime that sits between your app and local/cloud LLMs.

It gives applications one endpoint that can decide:

• when to stay local
• when to use the cloud
• when privacy should override convenience
• which provider and model should handle the request
• why that decision was made
• when verification forced an escalation
• when privacy detection forced local execution

The goal is simple: route each step to the cheapest, fastest, safest model that can still be trusted.

Who This Is For

This repo is mainly for:

• AI app builders
• local-first power users
• agent and workflow developers
• teams experimenting with privacy-aware and cost-aware inference

If you want a polished end-user chat app, this is not that. If you want a runtime and routing layer you can plug into your own tools, this is exactly that.

What This Is

Think of RouteLabs as:

• a local runtime/server you run on your machine
• a Python client you can call from your app
• an OpenAI-compatible endpoint you can place in front of existing clients

It is not primarily:

• a browser extension
• a desktop UI
• a plugin marketplace product

Those may come later, but the current product is a runtime + middleware + API.

60-Second Quickstart

Install from PyPI, start the runtime, and send one request:

pip install routelabs-router
export OPENAI_API_KEY=your_api_key_here  # optional, enables cloud execution
router start --reload

Then in another terminal:

curl -X POST http://127.0.0.1:8000/v1/chat/completions \
  -H "Content-Type: application/json" \
  -d '{
    "messages":[{"role":"user","content":"Summarize this in one sentence: RouteLabs Router chooses between local and cloud models based on privacy, cost, latency, and task complexity."}],
    "private":false
  }'

Install

Recommended user install

pip install routelabs-router
router start

Contributor install

Clone the repo and install from source:

git clone https://github.com/routelabsai/router.git
cd router
conda create -n routelabs-router python=3.11 -y
conda activate routelabs-router
python -m pip install --upgrade pip setuptools wheel
pip install -e '.[dev]'
router start --reload

Why Use This

Most teams today have one of these problems:

• Ollama runs local models well, but it does not decide when a task should stay local versus escalate
• cloud gateways like LiteLLM and OpenRouter route across hosted APIs, but they are not built around local-first policy decisions
• chat apps can call models, but they usually hide the execution logic instead of exposing it

RouteLabs Router is the layer above those tools.

It is for teams who want:

• one API for hybrid local + cloud inference
• OpenAI-compatible model discovery for existing SDKs and UIs
• verification-aware escalation instead of naive “hard task -> expensive model”
• transparent routing decisions
• privacy-aware defaults
• automatic local preference for obvious sensitive or code-like content
• automatic local-to-cloud fallback when a provider is unavailable
• cost and latency visibility
• provider and model selection that can evolve over time
• a foundation for agentic step-level routing later

For the longer-term product thesis, see docs/VISION.md.

How You Use It

There are three practical ways to adopt RouteLabs today.

1. As a local runtime/server

Run:

router start --reload

Then point your tools to http://127.0.0.1:8000.

2. As a Python library client

Use the built-in client:

from routelabs_router import RouteLabsClient

client = RouteLabsClient("http://127.0.0.1:8000")
print(client.route("Summarize a short product description"))

3. As an OpenAI-compatible endpoint

If you already have code using an OpenAI-style client, point it at RouteLabs via base_url. Use model="route-auto" when you want RouteLabs to choose the concrete backend model for each request.

That is one of the easiest ways to adopt it without rewriting your app.

What It Looks Like

app / agent / extension
        |
        v
  RouteLabs Router
        |
        +--> policy + task complexity
        +--> privacy constraints
        +--> provider selection
        +--> verification hooks
        |
        +--> Ollama
        +--> llama.cpp
        +--> cloud provider

Quick Demo

Once the server is running, you can inspect decisions directly:

curl -X POST http://127.0.0.1:8000/v1/route \
  -H "Content-Type: application/json" \
  -d '{"task":"summarize a short product description","private":false}'

Expected shape:

{
  "target": "local",
  "provider": "ollama",
  "model": "qwen3:4b",
  "reason": "task is suitable for local-first execution",
  "complexity": "medium",
  "verify": true
}

What this tells you:

• the router chose local
• it selected ollama
• it picked a model
• it marked the request as worth verification

And you can send an OpenAI-style chat request:

curl -X POST http://127.0.0.1:8000/v1/chat/completions \
  -H "Content-Type: application/json" \
  -d '{
    "messages":[{"role":"user","content":"Summarize this in one sentence: RouteLabs Router chooses between local and cloud models based on privacy, cost, latency, and task complexity."}],
    "private":false
  }'

If Ollama is running locally, that request executes against your configured local model. If OPENAI_API_KEY is set, high-complexity requests can route through the configured OpenAI-compatible cloud provider. The response includes a trace showing the initial route, verification result, and any escalation.

Positioning

Tool	Core strength	What it does not solve
Ollama	Great local model runtime and API	Hybrid routing and policy decisions
LiteLLM	Cloud API normalization and routing	Local-first execution strategy
OpenRouter	Hosted provider access and fallback	On-device privacy-aware control plane
RouteLabs Router	Verification-aware local-first runtime with hybrid routing	Early-stage policy and provider coverage

MVP scope

The first version focuses on a narrow but useful slice:

• OpenAI-compatible chat-style request handling
• local/cloud routing decisions
• adapter-based execution
• verification-aware fallback hooks
• structured telemetry showing why a route was chosen

This repository intentionally starts small. It is a control-plane foundation, not a full chat app.

Use Cases

• Local-first copilots that should only escalate when a task gets difficult
• Privacy-sensitive workflows where private data should never leave the device
• Browser or desktop assistants that need one middleware layer above multiple runtimes
• Agent systems that want future step-level routing instead of a single fixed model

Current Status

This is an early but usable product foundation. The repository already includes:

• project docs
• roadmap
• contribution guide
• Python project metadata
• FastAPI server and CLI
• YAML config loading
• route inspection endpoint
• OpenAI-style /v1/chat/completions endpoint
• OpenAI-compatible /v1/models discovery endpoint
• real local execution through Ollama
• generic OpenAI-compatible cloud execution
• first verification-aware escalation loop
• automatic fallback from local provider failures to the cloud when policy allows it
• stats endpoint for local/cloud/escalation visibility
• simple estimated cost savings in stats
• heuristic privacy detection for email/identifier/code-like content
• recent route logs for per-request inspection
• test coverage for routing and API behavior
• example config profiles
• example curl flows

Still early:

• verifiers are heuristic and still early
• cost and latency dashboards are not implemented yet
• privacy detection is heuristic rather than model-based
• learning from user corrections is still future work

More Docs

• Product vision: docs/VISION.md
• Architecture: docs/ARCHITECTURE.md
• Roadmap: ROADMAP.md
• Contributor guide: CONTRIBUTING.md
• Release guide: docs/RELEASE.md
• PyPI trusted publishing: docs/TRUSTED_PUBLISHING.md

Setup And Usage

Prerequisites

• Python 3.11+
• conda recommended for the smoothest setup on macOS

Install from PyPI

conda create -n routelabs-router python=3.11 -y
conda activate routelabs-router
python -m pip install --upgrade pip
pip install routelabs-router

Install from source

Use this path if you want to contribute or modify the router itself.

git clone https://github.com/routelabsai/router.git
cd router
conda create -n routelabs-router python=3.11 -y
conda activate routelabs-router
python -m pip install --upgrade pip setuptools wheel
pip install -e '.[dev]'

Configure cloud execution

If you want cloud-routed requests to execute instead of returning a configuration error, set:

export OPENAI_API_KEY=your_api_key_here

The default cloud adapter uses the OpenAI-compatible endpoint configured in config/router.yaml.

Why conda is the recommended path

During validation we hit two common issues that conda + Python 3.11 resolved cleanly:

• Python 3.9.7 was too old for this project
• older packaging tooling made editable installs unreliable

If you see requires a different Python: 3.9.7 not in '>=3.11', create the conda environment above and retry.

Run tests

pytest

Optional profile configs

The repo includes starter profiles in config/profiles/:

• balanced.yaml
• local-first.yaml
• privacy-first.yaml

Use one as your active config by copying or merging it into config/router.yaml.

Start the runtime

router start --reload

For explicit host or port overrides:

router start --host 0.0.0.0 --port 8000 --reload

Inspect a routing decision

router route --task "summarize a short product description" --private false

Test the API

Health check:

curl http://127.0.0.1:8000/healthz

Route inspection:

curl -X POST http://127.0.0.1:8000/v1/route \
  -H "Content-Type: application/json" \
  -d '{"task":"summarize a short product description","private":false}'

Stats endpoint:

curl http://127.0.0.1:8000/v1/stats

Recent route logs:

curl http://127.0.0.1:8000/v1/logs

Model discovery:

curl http://127.0.0.1:8000/v1/models

Python client

You can also call the router from Python:

from routelabs_router import RouteLabsClient

client = RouteLabsClient("http://127.0.0.1:8000")

route = client.route("Summarize a short product description")
chat = client.chat(
    [
        {
            "role": "user",
            "content": "Summarize this in one sentence: RouteLabs Router chooses between local and cloud models based on privacy, cost, latency, and task complexity.",
        }
    ]
)
stats = client.stats()
logs = client.logs()

There is also a runnable example in examples/python-client.py.

OpenAI-compatible drop-in example

If you already use the OpenAI Python SDK, you can point it at RouteLabs:

from openai import OpenAI

client = OpenAI(
    base_url="http://127.0.0.1:8000/v1",
    api_key="not-needed-for-local-dev",
)

response = client.chat.completions.create(
    model="route-auto",
    messages=[
        {
            "role": "user",
            "content": "Summarize this in one sentence: RouteLabs Router chooses between local and cloud models based on privacy, cost, latency, and task complexity.",
        }
    ],
)

See examples/openai-compatible-client.py. You may need to install the OpenAI SDK separately:

pip install openai

The stats response includes simple estimated fields such as:

• estimated_total_cost_usd
• estimated_baseline_cloud_cost_usd
• estimated_cost_saved_usd
• estimated_cloud_requests_avoided

OpenAI-style chat completion:

curl -X POST http://127.0.0.1:8000/v1/chat/completions \
  -H "Content-Type: application/json" \
  -d '{
    "messages":[{"role":"user","content":"Summarize this in one sentence: RouteLabs Router chooses between local and cloud models based on privacy, cost, latency, and task complexity."}],
    "private":false
  }'

If Ollama is running locally, the chat endpoint will execute against your configured local model. If OPENAI_API_KEY is set, high-complexity tasks can execute through the configured OpenAI-compatible cloud provider. If it is not set, cloud-routed chat requests return a clear configuration error. If the local provider is unavailable and the request is not forced to stay private, RouteLabs can now fall back to the cloud automatically and record that decision in the trace. The stats endpoint gives a simple first pass at the eventual cost/latency visibility story by showing how many requests stayed local, how many escalated, and how often verification failed. It also includes a lightweight savings estimate based on configurable per-request local and cloud cost assumptions. The logs endpoint exposes recent request-level decisions so users can inspect privacy detection, verification, escalation, final route choice, and estimated per-request cost directly.

Existing tool compatibility

RouteLabs now exposes the two OpenAI-style endpoints many existing tools check first:

• /v1/chat/completions
• /v1/models

That makes it easier to place RouteLabs in front of:

• OpenAI Python SDK clients
• LangChain ChatOpenAI clients configured with base_url
• Open WebUI connections that validate providers through /models

Privacy-aware behavior

The router can now automatically prefer local execution for requests that look like:

• emails or phone-like identifiers
• SSN-like or account-like identifiers
• secret-like tokens
• code-like content

This first version uses lightweight heuristics so it is easy to run locally. For a more advanced future detector, the project can integrate a model such as openai/privacy-filter.

Run with Ollama

Start Ollama, make sure the configured model exists, then run the server:

ollama serve
ollama pull qwen3:4b
router start --reload

The default local provider configuration lives in config/router.yaml.

Hybrid mode example

With both Ollama and OPENAI_API_KEY configured:

• simple tasks usually run locally
• private tasks prefer local execution
• high-complexity tasks can route to the cloud

Example cloud-leaning route check:

curl -X POST http://127.0.0.1:8000/v1/route \
  -H "Content-Type: application/json" \
  -d '{"task":"design architecture for a multi-step agent","private":false}'

More examples

• curl walkthrough: examples/curl-quickstart.md
• product framing and common scenarios: examples/use-cases.md

Example Routing Philosophy

• send simple, low-risk tasks to local models first
• prefer local execution when privacy rules require it
• escalate to stronger models when verification or confidence checks fail
• keep the decision trace visible so routing can be audited and improved

Near-Term Roadmap

• richer verification strategies beyond heuristics
• policy packs for privacy and cost controls
• better task classification and prompt-shape heuristics
• latency-aware telemetry and routing feedback loops
• benchmark harness for local vs cloud trade-off analysis

More detail lives in ROADMAP.md.

License

This scaffold uses the MIT License. See LICENSE.