Ryan Duguid - Australian Computational Accounting

Install in 3 commands

# Add Australian Accounting & Tax MCP server to Claude Code
claude mcp add aus-accounting -- uvx --from \
  git+https://github.com/ryanduguid/au-tax-mcp-server aus-accounting-mcp

# Add Public Practice & Tax skills
npx skills add ryanduguid/australian-accounting-skills

# Add Construction & Mining Subcontractor skills
npx skills add ryanduguid/hardhat-ledger

The Stack

1. Data & Ledgers

xero-trial-balance-export

Validated Xero trial balance export to CSV for Power BI, Excel and pandas.

accounting-excel-toolkit

Power Query (M) and VBA utilities for Australian ledger work.

2. Rules & Engines

Ozzit

130 native Excel LAMBDA functions for dynamic-array financial modelling.

TheExchequerTally

Company tax rate (BRE), franking account balance, Division 203 checks.

SolomonsSword

Trust Div 6 allocation, s100A risk flags, s99B foreign trust receipts.

payday-super-checker

Payday Super 2026 contribution timing and SG-charge estimates.

ato-benchmark-compare

Offline variance analysis against ATO small-business benchmarks.

3. Agent Workflows

au-tax-mcp-server

aus-accounting-mcp

Unified MCP server for Claude, Cursor, and Antigravity.

australian-accounting-skills

9 Claude Code skills for public practice (BAS, FBT, Div 7A, STP).

hardhat-ledger

Construction and mining subcontractor skills.

DrDebits

APES 110 and TPB Code ethics guardrails for LLM tax work.

xero-ai-review-gateway

Zero-network safety boundary for AI-assisted TB review.

Engineering Principles

Primary Source Grounding Computations cite Commonwealth legislation, ATO rulings, and AASB/APESB standards.

Exact Decimal Arithmetic Decimal quantisation prevents binary floating-point drift in financial outputs.

Local Privacy Boundaries Client data stays in local memory or zero-network sandboxes. Public fixtures use synthetic data only.