# Green Rose Systems

> A software studio designing and building durable systems for businesses growing into the long term. Founded 2026. Los Angeles, San Francisco, New York. Products span iOS, open source, and research.

Green Rose Systems was founded by [Peter Laffey](https://peterlaffey.com), a staff-level software engineer with roles at Reddit and Tinder, and the creator of Signal-Driven Development — a method for doing software engineering with LLMs that constrains the inherent error in their output and reduces information loss in human-to-LLM communication.

## Studio
- [Home](https://greenrosesystems.com/): overview of the studio's practice
- [Products](https://greenrosesystems.com/products.html): shipped products
- [Open systems & platforms](https://greenrosesystems.com/open-systems.html): open-source tools, systems, and plumbing
- [Research](https://greenrosesystems.com/research.html): LLM orchestration and smaller-model research

## Products
- [Glitchforge: Datamosh Studio](https://greenrosesystems.com/glitchforge.html): A native bitstream corruption engine for video, written in Rust on top of FFglitch, with ground-up re-implementations of the MPEG-2, MPEG-4 Part 2, H.264, and H.265 (HEVC) decoders. iOS app; open-source desktop app soon.
- [Cascade: Drop & Merge](https://greenrosesystems.com/cascade.html): A calm physics puzzle. Drop pieces, merge them, watch cascades happen. iOS, free, no ads, no IAP.
- [Audio Object](https://greenrosesystems.com/audio-object.html): A four-track looper and recorder built in a faceted design style. Six-sided object; rotate to switch faces; almost no buttons. iOS.
- [Video Thing](https://greenrosesystems.com/video-thing.html): A live video instrument for iOS. Four sources, live mix, on-screen controls. No timeline, no clip bin, no export queue.

## Open source
- [cascade-img](https://greenrosesystems.com/cascade-img.html): A visual asset generation pipeline an LLM can run. MCP server exposing 23 tools that drive Midjourney end-to-end from a conversation.
- [substrate](https://greenrosesystems.com/substrate.html): A computational orchestrator. A Python runtime that composes any callable — LLMs, ML models, deterministic transforms, subprocesses, parsers — into a single coordinated run over one append-only log. Eight shipped topologies. On PyPI as substrate-kernel.
- [substrate-ui](https://greenrosesystems.com/substrate-ui.html): A console for watching, steering, and authoring Substrate runs. Vanilla JS frontend, stdlib Python backend, no build step.
- [traveler](https://greenrosesystems.com/traveler.html): A factory-execution record system. 132 operations, 43 records, 16 state machines, 33 authorization rules. TypeScript on Node. Reverse-engineered from public sources using Signal-Driven Development.

## Research
- [large-price-model](https://greenrosesystems.com/large-price-model.html): A transformer on SPY fifteen-minute bars across twenty parallel time series. Every seed beats every baseline seed on log-loss (3.180 vs tuned linear 3.256, MLP 3.212, GRU 3.219). Gain lives in the shape of the distribution. Apache 2.0.

## Founder
- [Peter Laffey](https://peterlaffey.com): Founder. Staff-level software engineer in Los Angeles. Roles at Reddit and Tinder. Economics and computer science at Columbia University, concentration in intelligent systems.
- Tinder / Match Group: owns the payment backend end-to-end at Match Group scale — ~$3B annual revenue, $1.7B Tinder Direct Revenue, ~$41B market capitalization at the 2021 peak. Every App Store and Play Store integration; subscription management behind Tinder Gold and Tinder Platinum; consumables (Super Boost, Boost, Super Like); the user-entitlement system; tax; promo codes; paywall automation; zip-code offers; dunning; auto-renewal; fraud detection; third-party integrations across the payments perimeter.
- Reddit: rebuilds the paid-feature system — Reddit Gold, awards, the digital-goods surface; contributes to the Collectible Avatars / NFT program. Platform scale ~73M daily active users, ~$800M annual revenue, $6.4B IPO valuation.
- [peterlaffey.com](https://peterlaffey.com): full background and current work.
- [LinkedIn](https://www.linkedin.com/in/peter-laffey/): professional history.

## Contact
- Engagements: info@greenrosesystems.com
- Support: support@greenrosesystems.com

## Feeds
- [robots.txt](https://greenrosesystems.com/robots.txt): crawler policy
- [llms-full.txt](https://greenrosesystems.com/llms-full.txt): full site content in one document