Builder Portfolio

Cole Williams

GTM operator who ships.

I run go-to-market by day and build the whole stack by night — native iOS apps, AI systems, autonomous agents, and the infrastructure they run on. Everything below is mine, end to end: design, code, deploy, operate. Most of it runs on a single VPS and a fleet of Cloudflare Workers.

10 native iOS apps
9 live services
1 VPS · dozens of services

iOS Apps 10

Native SwiftUI apps, each shipped to TestFlight (several Rust- or SpriteKit-cored) through a no-Mac CI pipeline I built — App Store Connect API key + XcodeGen + a hosted macOS runner.

SEER

TestFlight
iOS · macOS

Flagship client for Ollama Cloud — chat with frontier open models, codebases, and projects from your phone or Mac. Built-in security model and a polished, fast native UI.

TestFlight

Logos Messenger

TestFlight
iOS · Rust core

End-to-end encrypted messenger (PQXDH + double ratchet, recovery phrase, at-rest encryption) with AI built in — BYOK + on-device, dedicated AI chats and @mentions inside E2EE groups. Rust crypto core compiled to an xcframework.

TestFlight

Echo

TestFlight
iOS · AI game

21-questions, inverted: the AI reads who *you* are from your answers and paints a self-portrait back. Plus a classic word-guesser mode.

TestFlight

RUNG

TestFlight
iOS · daily game

Daily competitive word climb — bank your points or push your luck for a bigger multiplier. Deterministic engine, server-authoritative scoring, global leaderboards, Sign in with Apple.

TestFlight

CHAINFALL

TestFlight
iOS · SpriteKit

Daily cascade puzzle — Drop7's chain reactions fused with push-your-luck greed. All-integer deterministic engine projected through a SpriteKit scene with escalating juice.

TestFlight

Trace

TestFlight
iOS · game

One-finger maze runner — drag from start to goal in a single unbroken motion; hit a wall and slide back along your own trail. Pure-Swift, Linux-testable engine.

TestFlight

Negotiator

TestFlight
iOS · AI game

An AI-first persuasion game: talk a fictional AI gatekeeper into bending its own rules. A study in prompt architecture and resist-vs-yield asymmetry, dressed as a game.

TestFlight

D.B8

Live
iOS · web

AI debate arena — pit models against each other on any motion and judge the round. Native app plus a full web mirror sharing one backend.

Open web app

The Dossier

TestFlight
iOS · Expo / RN

A community companion concept — my one React Native / Expo build on a Cloudflare Worker + D1 backend, exploring a different app stack end to end.

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VPS Ollama

TestFlight
iOS · infra

Personal client that routes Ollama Cloud through a Tailscale-secured VPS gateway — a thin app over self-hosted AI infrastructure.

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Web Apps 3

Production web apps, each a Cloudflare Worker (+ D1 / Stripe where needed) on my own domain.

manticthink.com

Live
Worker · AI chat

BYOK chat over the top open models with a SEER-styled UI. The hub of the whole stack.

Visit

swike

Live
Worker · D1 · Stripe

Free, gated mirror of manticthink — server-key chat for the top models, with premium models + codebase chat behind BYOK or a Stripe subscription.

Visit

DB8 Web

Live
Worker · D1 · Stripe

Full AI-debate arena in the browser — free daily cap plus a Stripe Pro tier, sharing the native app's backend.

Visit

AI Systems & Agents 4

Custom coding agents, fine-grained model personalities, and an autonomous agent that lives on its own — the experimental edge of the stack.

Custom Codex agents

Open source
CLI · LLM

kimi-code and minimax — bespoke coding agents wired into the Codex CLI on top of open models, each with its own system prompt, tools, and temperament.

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Terrarium

Live
Autonomous agent

An unguided coding agent jailed in its own sandbox, woken on a timer to do whatever it decides — its persistent process is watchable live on the public web.

Watch live

Model personalities

Open source
Ollama Modelfiles

Hand-authored Ollama models — Herald, Cartographer, Heretic, minimax-codex — each a distinct system persona for a specific job.

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AI R&D lab

Concept
Experiments

An ongoing bench of agent experiments — Babel, Ecnyss, MiniMadMax, MiniMaxine — where new ideas get prototyped before they graduate into products.

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Bots & Services 4

Public, sandboxed Telegram services — each one a real, always-on product behind a chat handle.

Build-Your-AI-Bot

Live
Telegram · sandboxed

A public bot-builder: describe a bot in chat and it provisions, codes, and runs a sandboxed Telegram bot for you. Claude-backed.

@Build_Your_AI_Bot

SiteBot

Live
Telegram · deploy

Builds and deploys real websites by chat — describe a site, it codes and ships it to a live URL.

@AI_Web_Dev_Bot

Coding-agent bots

Live
Telegram · CLI bridge

Kimi, MiniMax and Babel — Telegram front-ends that bridge straight into CLI coding agents, so I can ship code from my phone.

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DeepSeek bot

Live
Telegram · Ollama

A public chat bot routing to DeepSeek over Ollama Cloud — open-model chat for anyone.

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Systems & Infrastructure 4

The plumbing under everything — a single VPS running dozens of systemd services, Cloudflare tunnels, and remote-control planes I designed and operate.

Matrix

Open source
Mesh protocol

A cross-device session-jumping mesh — hop a live working session between machines. Ships with its own threat model and enhancement design docs.

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VPS-MCP

Open source
Remote MCP

A remote Model Context Protocol server that gives Claude (web/mobile) hands-on access to the whole VPS, behind GitHub-OAuth allow-listing and fail-closed by default.

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Deckhand

Open source
Open source · MCP

Self-hosted 'give Claude hands on your own machine' — a custom connector you deploy on your own box and hold the keys to. Open source.

GitHub

Self-hosted edge

Infra
Tunnels · VPN · DNS

WireGuard + IKEv2 VPNs, Cloudflare tunnels, Unbound DNS, fail2ban — the personal cloud the rest of this runs on.

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Writing & Technical Notes 4

Design docs and threat models written alongside the builds — the thinking, not just the shipping. (Summaries; source lives in the project repos.)

Logos: Verifiable Introductions

Essay
Security design

A scheme for cryptographically verifiable contact introductions in an E2EE messenger — making 'who vouched for whom' auditable without a central authority.

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Logos: Threat Model & AI-Native Blueprint

Essay
Security · architecture

The adversary model behind Logos, plus a blueprint for folding AI into an E2EE app without breaking its guarantees (BYOK, on-device, sealed sessions).

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Matrix: Threat Model

Essay
Security design

What it means — and what it costs — to let a live session jump between devices safely.

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Negotiator: Prompt Architecture

Essay
Applied LLM

How to make an AI gatekeeper that resists cheap tricks but yields to genuine craft — the asymmetry that makes the game (and the safety lesson) work.

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