Claude Code skills · updated 2026-10-03

GKG & RVG 2025 fee table skill for Claude Code — Mahnbescheid fees, 2021 values

Finds every German court and lawyer fee in your code still on the 2021 table

On one 19-line Inkasso fee module it printed 7 findings (6 errors, 1 warning) from 5 rules, each with file:line and the 2025 value.

Get it on Whop - $12 onceGet it on Gumroad

Who it's for

For developers of German dunning, Inkasso and legal-billing software that compute Mahnbescheid fees.

What breaks, and when

Since 1.6.2025 (KostRÄG 2025) GKG and RVG Anlage 2 values are higher; code on the 2021 table claims too little, e.g. a 36,00 € KV 1100 minimum instead of 38,00 €.

What it printed on the bundled example

== Kostentabellen-Lint: GKG & RVG 2025 für Mahn-Software — 7 findings (6 errors, 1 warning) in 1 file · 5 rules
  WARNING src/inkasso/mahnkosten.ts:2  [tabelle-stand-vor-2025]
        Tabellen-Stand 2021-01-01 liegt vor dem 1.6.2025 (KostRÄG 2025) — Werte prüfen.
  ERROR src/inkasso/mahnkosten.ts:4  [gkg-tabelle-2021]
        GKG Anlage 2 bis 500 €: 38,00 € ist der Wert von 2021 — seit 1.6.2025 gilt 40,00 €.
  ERROR src/inkasso/mahnkosten.ts:6  [gkg-tabelle-2021]
        GKG Anlage 2 bis 5.000 €: 161,00 € ist der Wert von 2021 — seit 1.6.2025 gilt 170,50 €.
  ERROR src/inkasso/mahnkosten.ts:11  [rvg-tabelle-2021]
        RVG Anlage 2 bis 500 €: 49,00 € ist der Wert von 2021 — seit 1.6.2025 gilt 51,50 €.

What you get

• A scanner Claude runs over every source file - not fee values from memory
• Both 2021 and 2025 tables, 22 steps from 500 € to 50.000 €
• KV 1100 minimum 38 € and factor 0,5; old Stand dates
• Edits applied only after you say yes; exit 1 in CI on any error

Install

Unzip into ~/.claude/skills/ (all projects) or your-repo/.claude/skills/ (one repo), then ask Claude Code: "Our Inkasso backend calculates the court and lawyer fees for Mahnbescheid applications and I'm not sure the tables were updated for the 2025 fee increase. Can you go through the code and tell me which fee values are out of date? Don't edit anything yet.". Needs Node 16+.

unzip gkg-rvg-2025-fee-table-check.zip -d ~/.claude/skills/

Ask Claude

“Our Inkasso backend calculates the court and lawyer fees for Mahnbescheid applications and I'm not sure the tables were updated for the 2025 fee increase. Can you go through the code and tell me which fee values are out of date? Don't edit anything yet.”

What it does not do

Checks fee constants only; no full bill, Auslagen, interest or VAT, and no court contact.

FAQ

What is a Claude Code skill?

A folder with a SKILL.md and scripts that Claude Code loads when your request matches it. You ask in plain words and Claude runs the scanner the skill carries.

How is this different from asking Claude without the skill?

The skill carries a dated rule table and a scanner that reads every file, so Claude quotes the exact date and line instead of answering from memory.

Does it send my code anywhere?

Checks fee constants only; no full bill, Auslagen, interest or VAT, and no court contact.

How do I install it?

Unzip into ~/.claude/skills/ (all projects) or your-repo/.claude/skills/ (one repo), then ask Claude Code: "Our Inkasso backend calculates the court and lawyer fees for Mahnbescheid applications and I'm not sure the tables were updated for the 2025 fee increase. Can you go through the code and tell me which fee values are out of date? Don't edit anything yet.". Needs Node 16+.

What do I get when I buy?

The zip. On Whop it is in your library as a download lesson with the zip attached; on Gumroad it is the product file.