Open-source · MIT · For Claude Code

Sole-trader tax & accounting,
inside Claude Code.

A marketplace of subagents and skills tuned to sole traders and personal taxes. Calculate taxes, file reports, issue invoices, declare investments — in the working language of each country.

Browse countries → View on GitHub ↗
Quick install (UA + PL) ~/claude-code
/plugin marketplace add crankshift/businesspowers
/plugin install ua@businesspowers
/plugin install pl@businesspowers
/reload-plugins
Paste all four lines into a running Claude Code session
Don't have Claude Code yet? Install it here
2
Plugins
20
Subagents
42
Skills
MIT
License
Plugins

Pick the country you operate in.

Namespaces don't collide — run one, run both. Each plugin ships its own agents, skills, templates, and working language.

ФОП · Sole trader · Taxes · Reporting · Invoicing · Investments

Ukraine

/ua:…
Command prefix
/ua:…
Working language
Ukrainian
Subagents 9
ФОП registration
Tax system advisor
Tax calculator
Reporting & deadlines
ФОП closure
Personal tax advisor
Investment taxes
Invoice manager
Invoice analyzer
Skills 20
Єдиний податок calc
ЄСВ calc
ПДФО + military tax
General system calc
Tax group selection
КВЕД reference
Opening checklist
Closing checklist
Reporting deadlines
ЄП declaration
Investment declaration
Crypto declaration
НБУ currency rates
Tax treaties
ДПС portal
Дія resources
Invoice issuance
Bank statement parsing
Invoice templates
Invoice ↔ declaration
/plugin install ua@businesspowers
JDG · Sole trader · PIT · ZUS · VAT · Invoicing · Investments

Poland

/pl:…
Command prefix
/pl:…
Working language
Polish
Subagents 11
JDG registration
Tax form advisor
Tax calculator
Reporting & deadlines
JDG closure
Personal tax advisor
Capital gains (PIT-38)
ZUS contributions
VAT management
Invoice manager
Invoice analyzer
Skills 22
PIT scale 12%/32%
PIT linear 19%
Ryczałt calc
ZUS calc
Health insurance
PIT-38 capital gains
Tax form selection
PKD reference
Opening checklist
Closing checklist
Reporting deadlines
PIT-38 filing
Crypto declaration
NBP currency rates
Tax treaties (UPO)
podatki.gov.pl
CEIDG lookup
Invoice issuance
KSeF XML parsing
Correcting invoices
Bank statement parsing
Invoice ↔ JPK_V7
/plugin install pl@businesspowers
Install

Two steps. Paste and go.

Add the marketplace once, then install the plugins you want. Namespaces stay isolated.

Before you install

businesspowers runs inside Claude. Pick how you want to run Claude itself first.

CLI

Claude Code (CLI)

Claude agent in the terminal — the commands below are written for it. Free to install; requires an Anthropic subscription or API key.

Install Claude Code
GUI

Claude Desktop App

Mac / Windows app with a chat UI. Add the marketplace via Settings → Extensions → Plugins → Personal → Add marketplace → paste crankshift/businesspowers. No terminal required.

Download Claude
Recommended for developers

Claude Code + VS Code

Run Claude Code inside VS Code — built-in terminal, file tree, side-by-side diffs, one-click open when Claude references a path. Easiest onboarding if you already spend your day in an editor.

  1. Download and install VS Code.
  2. In VS Code, open Extensions, search for "Claude Code", install the extension.
Download VS Code
claude — Pick a country
# Step 1 — add the marketplace
/plugin marketplace add crankshift/businesspowers
# Step 2 — install plugins
/plugin install ua@businesspowers
/plugin install pl@businesspowers
/reload-plugins

/plugin · /agents — After install, /plugin lists your connected marketplaces and /agents shows the subagents with their prefix.

How it works

Five rules every plugin obeys.

01
Verbatim tax rates
Rates and thresholds quoted exactly as enacted, with a direct primary-source link to the statute in force.
02
Mandatory source references
Every rate, deadline, or threshold carries article + source + verification date. No unsupported claims.
03
No fabricated interpretations
Tax rulings, KIS interpretations, and official explanatory letters — only from verified registries. Never invented.
04
Placeholder personal data
Templates use [ПІБ] / [imię i nazwisko], [РНОКПП] / [PESEL] / [NIP] — never real client data.
05
Drafts, not advice
Output is a working draft for a qualified accountant or tax advisor to review, adapt, and sign. Human owns the final copy.
Primary sources

Where rates and deadlines come from.

Agents pull and cite from the official tax authority of each country — not aggregators, not training cache.

UA · Ukraine

tax.gov.ua (ДПС) · zakon.rada.gov.ua · Дія.Бізнес · НБУ (курси)
  • tax.gov.ua (ДПС) tax.gov.ua
  • zakon.rada.gov.ua zakon.rada.gov.ua
  • Дія.Бізнес business.diia.gov.ua
  • НБУ (курси) bank.gov.ua

PL · Poland

podatki.gov.pl (MF) · isap.sejm.gov.pl · biznes.gov.pl (CEIDG) · NBP (kursy) · KIS (eureka)
  • podatki.gov.pl (MF) podatki.gov.pl
  • isap.sejm.gov.pl isap.sejm.gov.pl
  • biznes.gov.pl (CEIDG) biznes.gov.pl
  • NBP (kursy) nbp.pl
  • KIS (eureka) eureka.mf.gov.pl
⚠ Read this before installing

This is a calculation aid. It is not tax or accounting advice.

businesspowers does not establish an accountant–client relationship. All output is AI-generated against statute text and must be reviewed and verified by a qualified accountant or tax advisor before being filed or acted on. Neither Anthropic, nor the authors of this repository, warrant the accuracy, completeness, or timeliness of any output. Use at your own risk.