RheoServ Waumpaum
An offline-first credit-union core in one encrypted HTML file: cr-sqlite CRDT merge across operators and waumpaum settlement between institutions.
CURRENTLY SHAPING PLASTRON
rheophile10.
flowing code.
Building reactive substrates that run everywhere. Polyglot spreadsheets, self-contained OSes, and tools that feel like water.
online
Projects
What I'm building
A polyglot reactive substrate. Cels hold values, formulas, or compiled lambdas. Writing to one fires a cascade that recomputes everything downstream in topological order.
The eventual shape is a polyglot spreadsheet: write functions in any language a compiler is installed for (JS, WAT, Python, Scheme…), then call them from formulas in other cels. The same kernel powers a desktop shell, spreadsheet UI, CLI, or web app.
plastron.ca is live today with server-backed persistence — not zero-server anymore, though that remains the goal. Offline single-file builds are still in progress: no OPFS persistence yet, but more is coming. The north star is still a single index.html you can open, edit, share, and archive, with everything round-tripping through JSON.
TypeScript kernel
plastron.ca
WASM Doom
Zero-server goal
What ships in the OS
- Sheets — per-cell view cels, formula bar, infix formulas, server-backed persistence on plastron.ca
- Notepad — textarea bound to a cel, New/Save/Open via shared file toolbar
- File Explorer — folders + drag-and-drop, fs-tree synced on the hosted build
- Doom — Freedoom running on doomgeneric compiled to WASM. 60 fps, mouse + keyboard, 28 MB WAD inlined
plastron.ca runs online today. Offline single-file builds — without OPFS for now — are still on the roadmap.
plastron-simple-examples/plastron-os — the bundled desktop shell
Sheets
A1 = 12 · B1 =A1*1.5
C1 =B1*2 → 36
C1 =B1*2 → 36
File system
/notepad/untitled-3.甲
/sheets/q4-report.甲
/sheets/q4-report.甲
Polyglot
JS · WAT · Python · Scheme
compilers as cels
compilers as cels
The graph is the substrate.
One artifact carries code + data + compilers
More work
Other projects
TypeScript
Offline Protected-B HRIS
A Protected-B HRIS that runs offline in a single HTML file, merging HR records across operators with CRDT SQLite.
The Colonial Advocate
A single-page web app modelled after William Lyon Mackenzie's 19th-century reform newspaper.
Firearms vs Homicide
Civilian firearm ownership (Small Arms Survey 2017) charted against intentional homicide rates (UNODC), by country.
genenote-js
Lion Kimbra's genenote, reimplemented in JavaScript on top of plastron.
Writing
Blog
credit-union · offline · crdt · core-banking · waumpaum
RheoServ Waumpaum — a credit-union core in one HTML file 🏦
A sovereign, offline-first counterpart to enterprise core banking: a person-centered credit-union core in one encrypted HTML file, with CRDT multi-operator merge and waumpaum settlement between institutions. Teller, merge, and payment-provider walkthroughs with videos.
Read note
plastron · steganography · pyodide · chaosedgesteg
Hiding plastron links in pictures with ChaosEdgeSteg 🐢
Chaos-based edge steganography from crypt0lith, running verbatim in Pyodide cells. Hide a plastron.ca #f= link in a Twitter-safe PNG; recover it with cover + password.
Read note
plastron · hris · offline · crdt
Offline HRIS for a community police office 👮
A plastron detour — CRDT SQLite in one HTML file for offline HR merge. Juárez-skinned demo; patterns intended for plastron's own offline-capable future.
Read note
plastron · zhuangzi · interactive
曳尾塗中 — drag your tail in the mud 🐢
Zhuangzi's tortoise story in traditional Chinese. Click any character to break it down through a decomposition tree with English glosses.
Read note