Michael Gifford-Santos Work
Three systems I built and operate, and the things around them. Each of the first three has a page of its own, in the product’s own brand.
Built and operating
sigil
Agent-session infrastructureA daemon that turns tmux into a supervised process manager for long-running AI agent sessions — observable, interruptible, attachable from any device over HTTPS, and auto-restoring after a host crash. Built because operating a fleet of coding agents surfaces failure modes no local harness handles: the one that matters most is an agent blocked on a permission prompt, alive and doing nothing, with nobody watching.
See it →
mycellm
Distributed inferencePool heterogeneous hardware, contribute capacity, draw on it. What runs today is a QUIC overlay with NAT-friendly reverse connections — seeders dial out and the gateway routes inference back down the live session, because hole-punching does not survive symmetric NAT. Continuous batching hits 4.29× throughput at concurrency 32 with single-stream latency unchanged.
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WunderGuide
Production voice agentA voice-first travel concierge, live in the App Store and Google Play, launched Hawaiʻi-first — and a platform of about thirty services behind it, on k3s with blue/green deploys. A LiveKit agent grounded in live itinerary, location, travel-time and weather context under a real-time latency budget, given a wide tool surface to pull that context in. Retrieval is its own service group: OCR-and-web ingestion into Qdrant with reranking and reciprocal-rank fusion, a graph store alongside it, an MCP endpoint so other clients can use the same knowledge base, and hybrid vector + full-text search over Postgres for deals and business profiles.
See it →Also built
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Drydock
The factory floor for the agent fleet. I describe what I want; it plans the work, dispatches it to coding agents across hosts, and brings back deliverables for review. Provenance tainting, human-gated proposals, a usage ledger and rate-limit ceilings decide what is allowed to run unattended.
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GentlePrep
Clinical-prep companion for iOS and Android. Shipped and operated solo, store ops included — and making sales on SEO/ASO alone, with no marketing spend.
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Span
A physics-driven bridge builder for iPhone, iPad and Mac. Every beam carries a live X-ray of tension and compression, so you can see why a span holds or why it snaps — on a deterministic structural solver written from scratch, with no third-party dependencies. 57 levels across eight worlds, plus a level editor.
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E Pluribus
Civic-participation system — revocable delegation, Ed25519 signed receipts, Merkle proofs, ranked-choice tallying, over an append-only hash-chained ledger built so a public chain can be swapped in for it. That settlement layer is simulated today; everything above it is not.