For controllers, bookkeepers, and founders
Describe the business once — CRM, storefront, supply chain, payments, bank, books — then ask one question. You get a checked, explorable HTML map where every node names its system of record and no number is ever invented.
MIT license · no account · one HTML file
The same HTML file you would forward to a controller — generated, checked, and interactive. Not a marketing mock.
1 file
self-contained HTML
9/9
validation checks
5 types
one visual language each
181
brand marks built in
MIT
free · no account
01 — What it is
A free, MIT-licensed agent skill for Cursor, Claude Code, Codex CLI, and OpenCode. It turns a short interview about your operating stack into one self-contained HTML diagram.
Orders, cash and books each have exactly one owner in the map. Two systems claiming the same number is a brief failure, not a diagram.
If you did not supply an amount, it does not appear. The renderer never calls QuickBooks, Stripe, Shopify, an ERP, or a bank.
02 — How it works
01
One npx skills add command for your agent — or a manual ZIP for Raven.
02
A short interview: entities in scope and which system owns each domain. Saved as a brief — you answer once.
03
"Map how our business runs." "Why doesn't Shopify match QuickBooks?" Mosofin picks the type and checks it.
04
Forward the HTML, export a share card, or walk a guided view. No account, no server.
03 — Who it's for
Operators & founders
CRM, commerce, supply, payments, bank, and books on one page, with the system of record named on every node.
Controllers & bookkeepers
Walk a close, a payout rec, or an order path without invented amounts. If a residual is not zero, the map does not pretend it is.
04 — Six ways to see the business
Describe what you need and Mosofin picks the right visual language. Every image is a real delivered artifact.
05 — Get started
The same Skill for every supported agent. Raven stays a manual ZIP install: extract mosofin.zip into ~/.raven/workspace/skills, which yields ~/.raven/workspace/skills/mosofin.
Keyboard shortcuts in every diagram
Free · MIT-licensed · every artifact carries a 9/9 receipt
06 — FAQ
MosoFin-diagram is a free, open-source agent skill that turns a short interview about a business into a validated, self-contained HTML diagram of how it runs. Each node names the system of record that owns it, and each connection names what actually changes hands.
It draws six diagram types: architecture, workflow, sequence, data flow, lifecycle, pillars. 23 ready-made recipes cover questions such as how the whole business runs, the month-end close, a revenue walk, a payout reconciliation and cash to a payroll date.
No. If you did not supply an amount, it does not appear. The skill never calls QuickBooks, Stripe, Shopify, an ERP, or a bank.
Yes. MosoFin-diagram is free and MIT-licensed, needs no account, and makes no network call when it renders a diagram. Every logo it can draw ships inside the skill.
One self-contained HTML file. Zero dependencies, no server, no runtime. Open it in any browser, forward it, or export PNG, JPEG, WebP, SVG, or WebM.
Cursor, Claude Code, Codex CLI, and OpenCode via the switcher. Raven is a manual ZIP install: extract mosofin.zip into ~/.raven/workspace/skills, which yields ~/.raven/workspace/skills/mosofin.
Install the skill, read its SKILL.md, and let the built-in guide pick a recipe for the user's question. Then write the JSON spec, validate it, and deliver the HTML. The complete agent guide is at diagram.mosofin.com/llms-full.txt.
No. MosoFin is a read-only financial data workspace in Claude. MosoFin-diagram is a free, open-source skill that draws a map of how the business runs. They share a name and a team — not data.
One command installs MosoFin-diagram, and the map of how your business runs is one question away.
