Jason Shen
Ten years as a quant developer in Singapore.
In trading, sending an order and knowing what actually filled are different problems. I work on the systems that keep track of that difference.
I also build Battuta, a tool for editing music with an AI agent. The agent reads and changes MIDI files; I listen and decide what to try next.
Withmere is my work on a personal AI environment for life and work. I use Discord and Telegram to talk with agents and work on projects, while developing how the system carries conversations, memory and actions forward.
More about me →A piano accompaniment sounded too heavy, and I could not point to the notes. Finding them through conversation and listening, changing only those, and discovering that the score had already said something similar.
I designed my exercise log never to judge. Seven weeks into a plan with two strength sessions recorded, that same design keeps it from stating the gap.
A proactive AI feature worked before later changes exposed gaps in its integration. I trace what product requirements, shared boundaries and tests need to preserve.
Trading infrastructure, musical editing and a personal AI environment. These pages explain what I am building, the choices behind it and the examples or development accounts available to examine.
An interactive order and reconciliation demo. Drop a trade notification, recover the missing fill record, then complete or cancel the remaining order.
Constructed data; no live account connection.
How it works →A command-line MIDI editor for working on music with an AI agent. The agent inspects notes, writes an edit request, compares the files, and plays the result. The human listens and decides whether to keep the change.
v0.1.3 — published crate · Active development and self-use
How it works →A personal AI environment I am building and using through Discord and Telegram. It connects conversations with agents to project work, memory and scheduled actions.
Private development and personal use
About Withmere →Open the Lab to follow a buy order through recovery and completion, or compare two MIDI edits by ear.
I want to hear from people who have met the same things: state that drifts from what actually happened, tools that decide more than they should, an argument on this site you think is wrong. A short note is enough.
Get in touch →