What it takes to add a feature to an existing system
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.
Note
Jason Shen / Singapore
I build trading infrastructure and tools for working with AI.
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 →Recent writing
The instinct to compress
I almost wrote aggregation logic to save a few dollars a year on S3. The impulse was real. The savings were not.
Note
Keeping changes from two musical experiments
Compare four recordings of a Burgmüller passage, switching accompaniment deletions and shorter melody notes separately or together.
Essay
The systems behind the writing
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.
Trading Infrastructure
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 →Battuta
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.
v0.1.2 — published crate · Active development and self-use
How it works →Withmere
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.
Continue the conversation
If something here connects with a problem you are working on, I would like to hear about it.
Get in touch →