Project creator and maintainer: Tyler Katayama · Attribution
I've spent over a decade working with physical systems, troubleshooting failures, and learning what happens when the tools we're given don't solve the problems in front of us.
That curiosity eventually took me beyond mechanical equipment and into software, where I began exploring how the same principles of observation, diagnostics, and problem-solving apply.
I find connections, seek balance, and pursue integrity. I'm interested in understanding how things work, why they fail, and how we can improve them.
I'm still learning, still building, and sharing what I discover along the way.
Start with FEOS · The rest of my world · Let's connect
Personal · independent product · active development / founding pilot
The building is the interface. I'm building a map-first workspace that keeps issues, vendors, photo evidence, inventory, and budgets attached to the place they belong. It comes directly from the work I know: walking a property, finding the problem, and making sure the next person has the context.
Explore FEOS · Read the project
Personal · video monitoring and recording · privately maintained source
Watchpost brings camera feeds and compatible public streams into one browser-based monitoring workflow. It combines motion detection, local recording, and passcode-protected live viewing with a record of stream interruptions, timing changes, and continuity issues. Exportable logs and per-clip metadata keep the recording connected to what the application observed.
Personal · QA process design · v0.1 concept
A protocol for keeping QA findings, evidence, and human decisions traceable when working with AI agents. Built from an audit of a real QA exercise, it separates observations from expectations, checks claims against artifacts, and preserves the reasoning behind corrections. The protocol is documented; its gates remain provisional while validation is in progress.
WeAreDevelopers · Entire workshop · learning fork
A San Francisco stairway field guide with mapping, source attribution, and a clear distinction between surveyed counts and estimates. My copy comes from the Entire workshop and retains the upstream project's work and credits. I'm using it to study how a map earns trust in its data; I don't claim the inherited implementation as my own.
Explore the repository · Original project
Handshake AI Skills Studio · multiplayer game challenge · playable prototype
One device, two players, and a DIY budget that confidence cannot fix. A browser game about inspecting the clues, choosing the right order, and knowing when to call the pro. My facilities background meets a Marriage Meter.
Play a round · Read the design
Computer Information Systems, including Python / CIS 201. Formal study adds to the field experience I bring to software.
WeAreDevelopers — Entire workshop: workshop.01 is a reserved workshop repository; implementation hasn't started. SF Stairs above is the workshop learning fork.
Haunted Handshake — a creative terminal-animation experiment, made with ChatGPT + Codex. A Handshake logo reconstructed from code, with a little haunted-arcade energy.
Map-first interfaces, reliable data imports, browser-based tools, and how to carry useful context from the field into software. I use AI-assisted workflows, then inspect what they produce and keep the limits visible.
Open to school-compatible work in IT support, QA, data, software, or facilities operations.
Project context: this is my personal portfolio. Each project identifies its own origin and development state; workshop participation is not a claim of sponsorship or endorsement.