Iurii Uses: #Developer Tools

polytypo.dev – Locale-Correct Typography Engine and Spec

Open-source spec and engine for locale-correct typography: curly quotes, dashes, ellipses and no-break spaces in 20+ locales. Live in-browser playground.

n8n Verified Community Node – EU VAT Validation in Workflows

Verified n8n node for VIES VAT validation and EU rate lookups in a workflow, so onboarding or invoicing acts on a real VAT number, not a well-formed one.

vatnode.dev mcp – Official MCP Server for EU VAT Validation

Open-source MCP server that lets Claude Desktop, Cursor and other MCP clients validate EU VAT numbers and look up rates directly in chat.

An i18n linter that checks address register per audience, not just per language, plus key order and drift across a 32-locale JSON translation set.

Building the vatnode MCP server meant deciding whether format-checking and live VIES validation should be one tool or two.

polytypo’s typography engine is a nine-rule pipeline that locates and rewrites text without ever building or reprinting an AST.

Use linkinator to catch broken links before production: local URL rewriting, --silent flag, GitHub Actions, and false positives from LinkedIn and GitHub.

Data format comparison: JSON, YAML, TOML, CSV, Protobuf, MessagePack – tradeoffs, performance, and a decision framework for production systems in 2026.