Compilers, build systems, real-time audio and computational neuroscience. Cambridge, UK. Founder of Quilio. Neuroscience at the University of Cambridge, music technology at Birmingham Conservatoire.

Flow is a statically typed, compiled systems language for programs that evolve through time. It has a self-hosting compiler, a portable C backend and an evolving MLIR backend. Install with brew tap flooooooooooow/flow && brew install flow. Flow 1.0.2 and earlier are MIT-licensed; 2.0 and later use a proprietary license.

Full Flow source inventory → 5,554 actual .flow files, individually linked, across 18 public repositories. This includes libraries, applications, demos, test programs, compiler fixtures and benchmarks, not just standalone projects. The inventory reflects current default branches; private code and historical/deleted files are excluded.

• flow The language, standard library, backends, example galleries and test suites. 3,782 Flow source files. (docs, playground and demos)
• flow-compiler The self-hosted flowc, written in Flow, with C generation and an expanding MLIR pipeline. 234 Flow files.
• flow-idiomatics Advanced idiomatic examples: effects, adaptive pipelines, ownership and evolving systems.
• flow-kernel Tiny Core Linux system integration, eBPF, namespaces, cgroups and perf.
• flow-skills Flow-aware AI coding assistant skills, diagnostics and project templates.
• CallMeMaybe Flow bridge Flow bindings for C++ reflection, dynamic invocation and aggregate ownership.
• tree-sitter-flow Parser grammar and editor syntax queries.
• flow-tmLanguage TextMate-compatible syntax grammar for editors and GitHub Linguist.
• homebrew-flow Homebrew tap for Flow.

• flow-scikit A compiled classical ML library inspired by scikit-learn, with native deployment and no Python runtime requirement. (live)
• FlowStudio Early Flow-first scientific IDE with a browser workspace and R/Python runtime integration. (docs)
• hlb-cifar-flow Neural-network training in Flow, with CPU and Apple MLX numerical parity experiments.
• flowrat Real-time rat navigation, hippocampal activity, editable arenas and behavioural dynamics. (live)
• genomic-world Individual-based population genetics, ecological selection, live genomic statistics and evolving organisms.
• embryo-maker-flow Cellular morphogenesis workbench and browser Studio with native Flow simulation. (project)
• flow-euler The Project Euler corpus in Flow: 1,007 solved problems, plus compiler and backend verification. (live)

• doom-flow Doom rewritten in Flow, compiled for native and browser targets with deterministic framebuffer parity. (play)
• doom-flow-rl A Doom-like combat simulator and reinforcement-learning experiments using Flow's RL APIs.
• lsystem-garden Procedural L-system plants, seasons, ecosystems and genetic evolution in a browser world. (play)
• flow-gun A living 2D/3D evolutionary garden, simulated and rendered using Flow. (play)
• flow-chimera Experimental native Flow port of bounded agent memory, orchestration, reflection and preference scoring.

The main flow repository contains far more than compiler code. These are its actual example collections, with every source file indexed separately in FLOW_SOURCES.md.

Foundations and language: basics · book · flow_way · generics_traits · effects · concurrency · systems · interop · packages.

Compilers, verification and hardware: compilers · circuits · embedded · hardware · rf · crypto · net · verify · rosetta.

Simulation and evolution: dynamics · evolution · evoleco · ecosystem · morphogenesis · neuro · physics · planet · procgen · social.

Scientific and numerical computing: ai · ml · linalg · numerical · stats · data · gpu.

Interactive programs and media: games · graphics · threed · ui · audio · dsp · music · wasm · demos · bench.

Larger applications and playable demos: cart-pole control · HTTP server · FlowDB · HTTP JSON cache · Vulkan 2048 · Breakout · Pong · Snake · Tetris · layout and UI demos.

Compiler, library and performance corpus: compiler sources · compiler fixtures · standard library · language tests · benchmarks · runtime and tooling.

Other public Flow repository: flow-social is currently empty, so it does not appear in the source-file inventory.

Two build systems that answer the same question differently. azazel states a build as a CUE model and generates Zig from it. zaza drives the graph from Zig directly.

• azazel CUE model in, deterministic Zig build out. No JSON runtime, no flags. (live)
• zaza C, C++, Zig, CMake interop and WebAssembly, driven from Zig. (live)
• azazel-cache Content-addressed artifact cache, using GitHub Releases as the store.

Twelve real third-party projects, each built twice, once with azazel and once with zaza: SQLite, ghostty, libxev, libvaxis, tigerbeetle, zls, river, mach, microzig, capy, zig-gamedev, and the Zig compiler's own tokenizer. All twelve

Tools for making a result checkable by someone who is not you.

• perturbation-kernel Scalar, SIMD and GPU backends that agree bit for bit. Rust core, five language bindings, on PyPI and crates.io. (live)
• citeverify Checks every reference in a bibliography against eight bibliographic indexes. Reads BibTeX, RIS, CSL-JSON, .bbl, .docx and PDF.
• refereed A reviewer panel for a manuscript, running on your own model key.
• corpus-lens TF-IDF keywords, rhetorical fingerprints and embeddings across a whole corpus.
• tilekiln Procedural texture synthesis with measured parameter stability.

Audio has been the continuous thread. Product work runs through Quilio.

• danzig 3★ The VST3 C ABI implemented directly in Zig, as extern structs of callconv(.c) function pointers. No JUCE, no Steinberg SDK. (live)
• tinyML 8★ A C++ machine-learning and statistics library for embedded and real-time workloads.
• isobarcpp Daniel Jones' isobar algorithmic music library, in C++.
• Analog-Fattener 4★ An analog fattener effect in JUCE.
• Wobblefet Pink Trombone, the interactive vocal tract synthesizer, modified.

Learning systems and agent infrastructure, going back to networks written from scratch.

• Fractal-Memory-Network Recursive memory structure for long-running agents.
• safe-yolo-agent Allowlist permissions for an autonomous coding agent, so destructive calls cannot run unreviewed.
• CycleGAN-Timbre-Transfer Timbre transfer through a modified cycle-consistent adversarial network.
• Eye-Evolution Predator-prey eye evolution, using perceptrons and a genetic algorithm.
• Disparity-Network Depth from binocular image pairs.
• Slow-Feature-Analysis 3★ Stone and Bray's Slow Feature Analysis, implemented.

• wfdl-gallery A watch dial written as text. 58 faces across seven families, compiled from a small description language. (live)
• Shadow A 2D game engine kept small enough to read. (live)
• ShaderLibrary GLSL, Metal and Slang fragment shaders.
• cosmographs The graph at the top of this page. Every repo here, rendered on the GPU. (live)
• terminal-eye-candy Zero-dependency terminal animations in Python.
• Hydra-Sketches Audio-reactive livecoding for the Hydra video synth.

Smaller things that exist because something was annoying.

• chromium-tabscroll Horizontal tab scrolling for Chromium, rewritten against HEAD after Google removed it in M144.
• lpmd LitPro: executable literate programming for any language. (live)
• l1-cache-simulator An L1 cache simulator that shows hits, misses and eviction policy as they happen. (live)
• pypi-toolkit 4★ Builds, tests and uploads Python packages.
• PrintingCPP Talking to CUPS printers from C++.
• DYMO-Labelwriter-App Old DYMO label printers brought back into use.

The through line is asking how much of a stack stays necessary once you are willing to change the abstraction underneath it.

Other projects, including older work, are in the full repository index.

_{Flow repository links checked on 2026-10-21.}