Precursor (Xous) Development
Apps for Secure Hardware
Open-source applications for the Precursor secure hardware platform running Xous OS. Built in Rust. Focused on privacy, offline capability, and developer experience.
Open-source applications for the Precursor secure hardware platform running Xous OS. Built in Rust. Focused on privacy, offline capability, and developer experience.
Tools and methodology for developing Xous apps on the Precursor platform — particularly on macOS ARM64 where the Renode GUI is unavailable.
Developed entirely through LLM-assisted development (Claude Code), bootstrapping from zero Xous knowledge to working apps running on emulated hardware. The toolkit that made all the other apps possible.
Telnet monitor automation for macOS ARM64
Automated initialization and app launching
Full boot-to-app screenshot workflows
Hard-won discoveries from development
# Start Renode headless with telnet access renode --disable-xwt -P 4567 \ -e 'path add @xous-core; i @emulation/xous-release.resc; start' # Take screenshot of emulated display python3 scripts/renode_interact.py \ screenshot output.png # Initialize PDDB and launch app python3 scripts/renode_interact.py \ init-pddb a # Full sequence: boot + init + launch python3 scripts/renode_interact.py \ full-init 90
Production-ready apps built with the toolkit. All open source.
Unified timer suite with three modes: Pomodoro Timer, Stopwatch, and Countdown Collection.
Unified writing suite for Precursor: Markdown Editor, Journal, and Typewriter modes.
Flashcard app with multi-deck PDDB storage and network import via TCP push.
Commodore 64 emulator for Precursor hardware — 6502 CPU, VIC-II, CIA keyboard, monochrome rendering.
TI-85 competitor with dual algebraic and RPN modes, full scientific function library, and expression parsing.
The Precursor platform prioritizes security and user control. All apps are designed to work completely offline.
All apps built in Rust for memory safety, performance, and zero-cost abstractions on constrained hardware.
Plausibly Deniable DataBase for secure, encrypted local storage. No cloud dependencies.
Microkernel architecture designed for security-conscious users. Open source, auditable, trustworthy.
Secure hardware platform for privacy-conscious users
Precursor is an open-source mobile device designed for security. Unlike smartphones, every component is auditable and trustworthy.
In an era of increasing surveillance and data collection, Precursor offers a platform where users truly control their data and software.
These apps demonstrate what's possible when you prioritize user privacy, offline capability, and open-source transparency. No analytics. No tracking. No cloud lock-in.