This MCP server, io.github.jmshinhwa/jct-transition-lint-2026, is described as a linting tool related to JCT transition rules in Japan. The provided description highlights a policy change: the 80% deduction ends on 2026-09-30, and from 2026-10-01 the rate changes from 50% to 70% (令和8年度税制改正). It also references issues involving remaining values (0.8 and 0.5), per-line rounding, and a requirement that registration numbers use a T+13 digit format.

🛠️ Key Features

• Validates JCT-related transition handling
• Checks for remaining deduction codes/values: 0.8 and 0.5
• Flags per-detail (明細ごとの) fractional handling
• Ensures registration numbers follow “T+13桁” format

🚀 Use Cases

• Lint code or data fields during the transition period (2026-09-30 to 2026-10-01)
• Identify incorrect rate usage and rounding behavior in invoices or procurement records

⚠️ Limitations

• Only the described transition/rate/format checks are evidenced; no other capabilities are specified in the provided data