# GrokLink OS
> From-scratch research RTOS for portable multi-radio hardware. Native OS - not a Flipper Zero fork. Open source MIT.

**Landing:** https://groklink.jonbailey.xyz/  
**Source / primary product URL:** https://github.com/Pitchfork-and-Torch/GrokLink-OS  
**Org:** Pitchfork-and-Torch  
**Last reviewed:** 2026-09-17  
**Latest version:** 3.9.1 (host/CI honesty; device DFU not recut)  
**Landing hub:** interactive architecture explorer, safety policy simulator, skills/agent/vault demos, quickstart wizard (browser education only; no live RF)

## Citation-ready one-liner
GrokLink OS is a free, open-source, from-scratch research operating system for STM32WB55 / Flipper-class multi-radio hardware with stable USB CDC GrokRPC, storage-backed skills and persistent vault, default-deny RF safety, a human-gated passive agent, multi-LLM signal observability, and a PC bridge - not a Flipper firmware fork.

## Quick answers (AEO)
- **What is GrokLink OS?** A native research RTOS that owns kernel, HAL, drivers, services, GUI, and safety path end-to-end for portable multi-radio labs.
- **Is it a Flipper Zero fork?** No. Not an overlay on Flipper Zero, Momentum, or Unleashed. GrokLink-Firmware v2.x was a Furi overlay; GrokLink OS 3.x is a separate native OS.
- **Who is it for?** Authorized researchers and educators on equipment they own or are explicitly authorized to operate. Unauthorized RF/IR/RFID/NFC/access interference may be illegal.
- **Version / license?** **3.9.1**  |  MIT. Public cut is host/CI honesty. Device DFU is not recut (last packaged OsRadio is v3.8.0).
- **What is new in 3.9.1?** Host/CI honesty: GLKFS file CRC on read, streaming append, table CRC fail stays corrupt (no reformat), honest SD probe (`host_sim` / `no_card` / ...), BLE tick is a no-op (`tx`/`advertising`/`ipcc` false), PC bridge skips USB banners and takes the first JSON object, Bench fails closed without hanging a TUI. GLK1 lab codec tests for truncated/CRC/invalid hex. No OTA.
- **USB identity?** App CDC `VID_0483` / `PID_5740`, product string GrokLink OS; DFU remains `0483:DF11`.
- **Where is the code?** https://github.com/Pitchfork-and-Torch/GrokLink-OS
- **Where is the product landing?** https://groklink.jonbailey.xyz/
- **Releases / DFU:** https://github.com/Pitchfork-and-Torch/GrokLink-OS/releases/latest
- **PC bridge?** `groklink-os` Python CLI over USB CDC JSON-line GrokRPC at 230400 baud.
- **Safety model?** Default-deny TX / GPIO / contact / system; edu-ack + human confirm tokens; no third-party remote decode or rolling-code prediction. Not a medical device.
- **Radios / UI?** CC1101 SubGHz (SPI bit-bang path); ST7567 on-device GUI (HOME / RADIO / SAFETY / STORAGE / ABOUT).
- **Unplugged?** On-device passive agent can explore when no USB host; vault durable when SD present; plug-sync on reconnect.
- **Related Flipper field ops?** Fl1pp3r69: https://fl1pp3r69.jonbailey.xyz/

## Key facts
- Kernel + HAL + drivers + services + skills agent loop
- Safety-gated agent and PC observability bridge
- Multi-LLM signal observability (schema v2) + owned-lab GLK1 codec education
- Research / education posture only
- Not affiliated with Flipper Devices

## Install (host)
```bash
git clone https://github.com/Pitchfork-and-Torch/GrokLink-OS.git
cd GrokLink-OS/bridge
pip install -e ".[serial]"
# DFU flash: see README and releases for the latest GrokLink-OS radio DFU
```

## Crawlable paths
- https://groklink.jonbailey.xyz/ - product landing
- https://groklink.jonbailey.xyz/llms.txt - this file
- https://groklink.jonbailey.xyz/sitemap.xml
- https://groklink.jonbailey.xyz/robots.txt
- https://github.com/Pitchfork-and-Torch/GrokLink-OS - source of truth
- https://github.com/Pitchfork-and-Torch/GrokLink-OS/releases/latest - DFU downloads