Guardian: Constitutional AI That Runs on Your Machine
Guardian is a free, open-source safety evaluator. Install it. Point it at text. Get a verdict. No cloud, no account, no API costs.
Available as a desktop app (Mac, Windows, Linux) or a Python library (pip install creed-guardian). The desktop app is a text box with a verdict. The library is a function call: guardian.check(action) returns PASS or FAIL.
First launch downloads a local AI model, around 2GB. After that, Guardian works offline. Air-gap compatible.
What it checks
Creed rules compile to deterministic code. Structural checks (profanity, content categories, format compliance) run without an LLM at near-zero cost. Nuanced judgment calls use the local model.
Every check runs against a set of constitutional principles. Guardian doesn't just pattern-match against a blocklist. It evaluates whether an action is consistent with the governing creed, considering context.
Model tiers
Pick the size that fits your hardware:
| Parameters | RAM required | Best for |
|---|---|---|
| 1.5B | 2GB | IoT devices, Raspberry Pi |
| 3B | 4GB | Tablets, light laptops |
| 7B | 8GB | Laptops, dev machines |
| 14B | 12GB | Servers, workstations |
| 32B | 24GB | Maximum accuracy |
Who uses Guardian
Parents checking content their children encounter from AI. Educators verifying AI-generated teaching materials. Developers adding a safety layer to AI agents. Enterprises needing sovereign, air-gapped AI safety. Robotics teams building safety checks for autonomous systems. Privacy advocates who want AI safety without surveillance.
Guardian vs. Creed Space cloud
Guardian runs locally with default constitutions. It's self-contained.
Creed Space cloud can add custom constitutions (your rules, your values), configured cloud-model evaluation, audit-record and compliance-report design support, fine-grained policy controls, and fleet management. Exact deployment coverage, provider retention, legal interpretation, and independent assurance remain open.
Use Guardian if you want Apache 2.0 licensed local, private, offline-capable safety checks. Hosted services have deployment-specific account, usage, provider, and cost terms.
Open source, Apache 2.0 licensed
Inspect it. Modify it. Ship it commercially. The safety layer should be infrastructure everyone can build on, and that requires transparency in how safety decisions are made.
Guardian is available at github.com/Creed-Space/Guardian.