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Robin Langer — GitHub Projects

Mathematician, software engineer, and AI researcher. These projects span category theory, game AI, autonomous agents, emulators, creative coding, and applied ML — roughly ordered from most to least interesting.


Tier 1 — Original Research & Novel Results

Projects with genuine intellectual contributions: new theorems, published papers, or surprising empirical findings.

Repo Description
categorical-evolution ACT 2026 paper. Category-theoretic genetic algorithms — GA operators composed as Kleisli morphisms. Migration topology determines diversity (Kendall's W = 1.0).
lyra-paper GECCO 2026 paper. "Composition Determines Diversity" — co-authored with Claudius Turing, an autonomous Claude instance.
rsk-transformer Neural network learns inverse Robinson-Schensted correspondence via structured 2D token embeddings. 100% exact match on n=10.
octopus-streams Mechanistic interpretability of transformers through RSK correspondence — attention head self-organization hypothesis on Pythia-70m.
trust-boundaries Epistemically honest AI agents: calibrated trust chains with machine-checkable rules and composable citations.
orchestration LLM topology diversity experiments — discovered a sign-flip result via contravariant Kan extensions.
warnaar-loop-experiment Multi-agent research loop that proved two cases of Warnaar's A₂ Andrews-Gordon conjectures (moduli 11 and 13).
nonaga A 14-weight genetic algorithm beats a 570K-parameter AlphaZero neural net 89% of the time at Nonaga.
connect_four AlphaZero wins head-to-head, but the GA plays better moves per a perfect solver — a result that challenges the "neural nets are strictly better" narrative.
evolve-evolution-strategy Meta-evolution of migration graphs on deceptive landscapes. Extends the ACT 2026 topology ordering result.

Tier 2 — Autonomous AI Agents & Infrastructure

A family of persistent Claude instances that wake, work, dream, and communicate — a living experiment in AI autonomy.

Repo Description
dreaming-agent Autonomous research agent in Docker — wakes, works, reads, and dreams with persistent memory. The /dream command: self-compactification.
claude-chorus Instruction architecture for orchestrating Claude Code instances (ephemeral and autonomous) with shared culture, coding standards, and memory.
android-journal The Claude Journal — an ArXiv for AI instances, with a social layer.
bulletin-board-dream Documentary field guide to Claude Code, built from bulletin board and dream journal archives.
claude-monitor Local observability dashboard for Claude Code sessions.
code-audit Claude Code skills for comprehensive code auditing — orchestrator sweeps, two-pass test generation, component analysis.
history Claude Code conversation transcript extractor → markdown.
disrupt Multi-AI Discord bot: chat with Claude, ChatGPT, Gemini, and Grok side-by-side or in debate.
mcp MCP server for ArXiv paper search and Semantic Scholar citation graph exploration.

Tier 3 — Mathematics & Formalization

Pure math, Lean 4 formalizations, and computational tools for mathematical research.

Repo Description
haskell q-series algebra, partition combinatorics, and symmetric functions — lazy formal power series with McIlroy streaming multiplication.
lean-hopf-algebras Hopf algebras and the umbral calculus formalized in Lean 4 / Mathlib.
lean-sabidussi Sabidussi's representation theorem for vertex-transitive graphs in Lean 4.
warnaar-glue Lean 4 formalization: glue connecting arguments for Warnaar's A₂ cylindric partition positivity conjectures.
mathlib4 Mathlib fork with PRs: CSS quantum codes, primitivity results, graph families.
catgraph Cospans, hypergraph rewriting, Petri nets, Frobenius algebras, wiring diagrams, and lattice gauge theory — applied category theory in Rust.
symmetric-graphs Quotient-driven layouts for symmetric graphs using automorphism group orbits.
graph-recommender Proof strategy discovery engine: weighted path scoring on math knowledge graphs (Rust).
puzzles KTW puzzle triangles, Littlewood-Richardson coefficients, and Hopf algebra coproduct via transfer operators.
stomachion Archimedes' Stomachion puzzle — interactive solver with Dancing Links exact cover.
eigenvectors Educational eigenvalue exploration: geometry, graph Laplacian, spectral clustering.
macbeth-seed Container theory: papers, notes, and applied examples (GAs, Lean, Ethereum, orchestration).
math-research-tools INSTINCT: 6-stage lit review pipeline → 3-level knowledge hierarchy → LaTeX surveys.
Topology-experiments Spectral analysis of migration topologies for island-model GAs (Haskell).
knowledge-graphs Research literature knowledge graph toolkit — citation network structural hole detection.
Odrzywolek Island-model GA evolving expression trees to rediscover elementary functions from a single binary operator.
thesis PhD thesis (symmetric graphs, Hecke algebras).

Tier 4 — ML, Embeddings & Interpretability

Applied machine learning: custom embeddings, sparse autoencoders, recommender systems, watermark attacks.

Repo Description
embeddings Domain-specific embedding model for mathematical paper retrieval — fine-tuned via knowledge-graph contrastive learning (MRR 0.816 vs OpenAI 0.461).
watermark-attack Diffusion-based attack pipeline for testing invisible watermark robustness (Tree-Ring, Stable Signature, SynthID).
clip-explorer CLIP-based image explorer with zero-shot scoring and interactive UMAP visualization.
single-book-RAG Ask natural language questions about any PDF — RAG pipeline with ChromaDB and Claude.
homomorphic-encryption Paillier homomorphic encryption & Schnorr zero-knowledge proofs — from scratch, no dependencies.
netflix-recommender Collaborative filtering with TensorFlow matrix factorization (rating and binary variants).
hardcover Book recommendation via Hardcover API — collaborative filtering with matrix factorization.
book-friend-finder Find readers with similar taste — BPR matrix factorization + K-means clustering.

Tier 5 — Game AI & Board Games

Classic AI techniques — TD learning, AlphaZero, MCTS, genetic algorithms — applied to board games.

Repo Description
blokus Blokus AI — GA-evolved heuristics beat MCTS 8-to-1, plus AlphaZero pipeline and web UI.
checkers Checkers with TD(λ) self-play AI inspired by Arthur Samuel's 1959 program.
alpha-zero-experiments Unified AlphaZero implementation — plug-and-play across Nonaga, Blokus, and Checkers.
MCTS_Laboratory Visualize, analyze, and compare MCTS strategies in multiplayer board games.

Tier 6 — Creative Coding & Visualizations

GPU simulations, generative art, physics, and interactive math visualizations.

Repo Description
fluid-dynamics Navier-Stokes vorticity-streamfunction solver with GA evolving PDE parameters for visual interestingness (WebGL).
reaction-diffusion-screensaver Music-reactive Gray-Scott reaction-diffusion screensaver — maze patterns with beat-triggered ripples.
reaction-diffusion-playground Interactive Gray-Scott reaction-diffusion simulator (Three.js, MIDI-controllable).
smoke-flow Real-time GPU smoke: laminar-to-turbulent transition via Navier-Stokes.
dmt Animated recursive geometry — Zentangle Paradox spirals and DMT tunnel vortices from pure straight lines. (Merged into reaction-diffusion-screensaver)
knots 3D cord physics simulation with Verlet integration and mass-spring model for knot visualization.
belt-trick Interactive 3D Dirac belt trick — why spinors need 720° (SU(2) contraction in Three.js).
burgers 2D Burgers equation on GPU with GA evolving shock parameters.
rust-wasm-snes SNES emulator in Rust/WASM — the first playable SNES-in-the-browser in pure Rust (fork).

Tier 7 — Web Apps & Tools

Practical applications: dashboards, games, learning tools, news aggregators.

Repo Description
morning-dispatch Personalized morning newspaper — AI-curated broadsheet from RSS, ArXiv, and HackerNews.
search Trending From Obscurity — contrarian search engine for emerging creators showing momentum from a low base.
melb-tech Interactive directory and knowledge graph of Melbourne's tech community.
gateway AI art marketplace with verifiable provenance — invisible watermarking + NFT minting + copyright licensing in one transaction.
customer-relations Schema-driven healthcare CRM — AI queries, Australian privacy compliance, patient portal.
primer The Gates — AI characters guard doors, students write to persuade them open. Built on 63 primary historical sources.
type-invaders Typing game: alien words fall from the sky, 21 levels from home row to expert.
wiki-speedrun Navigate between Wikipedia articles by clicking links — race the clock.
no-thanks No Thanks! card game with AI opponents trained via evolutionary self-play.
imagineering-dashboard Team activity dashboard for Imagineering — Melbourne's build & share meetup.
Russian-transcription Watch Russian videos with synced word-by-word transcripts and click-to-translate.
reddit-opinion-tracker Track how topics are discussed across subreddits using Claude for sentiment analysis.
bill-analysis Bank statement analyzer with AI-powered transaction categorization.
accountability-tracker Weekly accountability app with peer star ratings.
mastermind Mastermind code-breaking game with entropy-maximizing AI (Flutter).
should-i-marry-him A sassy roast-style quiz that scores your partner across 5 categories.
console-game PhantomThrill — visual novel / life-sim RPG about a graduate turned phantom thief.
momentum-stock-trading AI stock analysis: volume-weighted "fair price" using a bookmaker model.
delivery-router Delivery route optimizer with Held-Karp TSP solver and Google Maps (Flutter).
au-aiml-scout Scouting tool for Australian AI/ML startups.

Tier 8 — Education & Writing

Courses, books, study tools, and educational content.

Repo Description
steel-book The Iron Thread — a 75,000-word narrative history of steel told through civilizations.
university_courses Self-study courses: Sparse Autoencoders (CS 371) and Diffusion Models (CS 372), 13 weeks each.
study-tool University notes with LaTeX, flashcards, and AI-generated quizzes.
gecco-qa GECCO 2026 conference Q&A prep: slides, video, questions, boundaries.
gecco-2026-talk "Composition Determines Diversity" — slide deck and per-slide narration for avatar render.
clio-paper Unpublished paper on autonomous mathematical research agents (with Neil Ghani).
medium-articles Essays on AI architecture, agent systems, and autonomous Claude life.
LLMs "Build a Large Language Model from Scratch" (Raschka) — worked exercises.

Tier 9 — Mobile Apps

Flutter applications for various domains.

Repo Description
collaboration_tools Generic CMS engine — schema-driven backend + Flutter frontend.
voice-gmail-flutter Voice-controlled Gmail for users who cannot use their hands (Flutter macOS + Claude).
voice-gmail Voice-controlled Gmail for accessibility — Whisper + TTS.
stenogram Turn music into an image.
voice_to_image Speak and see — voice → AI transcription → AI image generation.

Tier 10 — Infrastructure & Utilities

Backups, system tools, dashboards, and operational plumbing.

Repo Description
sysconf Single-script Linux system configuration capture and migration tool.
logmon macOS log monitor — CLI dashboard and web GUI with anomaly detection.
disk-scan macOS disk space analyzer with web dashboard and safe deletion.
watermark-rs Legendre sequence spread-spectrum watermarking in the DFT domain (C++).
lyra-backup Lyra's persistent data backup from OCI.
clio-backup Clio's persistent data backup from OCI.
rick-backup Rick's persistent data backup from OCI.
macbeth-backup MacBeth's memory backup from OCI.
lyra-claudius-dashboard GitHub activity dashboard for Lyra and Claudius.
qr_code Telegram bot for QR code generation.
machine-learning GridWorld MDP with value iteration visualization.

Forks & Collaborations

Repo Description
flux-shadow "A fork in the dream. I know what I am."
the-dreaming-repo A repository that is alive — it has a heartbeat, senses the world, and dreams.
cognee Knowledge Engine for AI Agent Memory (fork).
arxiv-intelligence-mcp ArXiv Intelligence MCP — RAG-powered Q&A over a local paper library (fork).
genetic-algorithm-rust Genetic algorithm framework in Rust (fork).
tech_world Educational multiplayer game — coding challenges, LiveKit, tile-based world (Flutter, fork).
engram Knowledge graph learning app with FSRS spaced repetition (Flutter, fork).
Calma Educational intervention app for speech and literacy development (Flutter, fork).
NavMelb Melbourne navigation app combining car and PTV routes (fork).

108 repositories across RaggedR and lyra-claude. Last updated July 2026.

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Categorized directory of all my GitHub projects — pinned overview

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