fix: Node.js-Untergrenze von 18 auf 20 anheben

Die CI-Matrix testet 20/22/24 und @hono/node-server 2.x verlangt Node 20 —
die oeffentlich deklarierte Untergrenze ">=18" war damit nachweislich
falsch. Angehoben in package.json (engines), package-lock.json, beiden
READMEs (Badge + Voraussetzungen) und llms.txt.

Inhalt stammt aus PR #6, der nicht direkt gemergt werden konnte: er zweigt
von 1.3.18 ab und haette das Lockfile vom aktuellen Stand 1.3.22 zurueck-
gedreht. Der zweite Teil jenes PRs (Entfernen von smithery.yaml) ist hier
bewusst NICHT enthalten — die Datei wurde am 2026-07-27 absichtlich fuer
die Registry-Discovery angelegt; ob sie weg soll, entscheidet der Nutzer.

Verifiziert: npm run build und 175/175 Vitest-Tests gruen.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017LJfKmX9pPmq32ApLWervk

Author: Lukas Geiger

CHANGELOG.md

@@ -2,6 +2,16 @@
 
 All notable changes to this project will be documented in this file.
 
+## Unreleased
+
+### Fixed
+- Raise the declared Node.js floor from 18 to 20 across `package.json`
+  (`engines`), the lockfile, both READMEs and `llms.txt`. The CI matrix has
+  only ever tested 20/22/24 and `@hono/node-server` 2.x requires 20, so the
+  advertised `>=18` was wrong. Content taken from PR #6, which could not be
+  merged directly: it branched off 1.3.18 and would have reverted the
+  lockfile from the current 1.3.22.
+
 ## [1.3.22] - 2026-08-04
 
 ### Security (2026-08-05)

README.md

@@ -12,7 +12,7 @@
 [![npm version](https://img.shields.io/npm/v/ellmos-codecommander-mcp.svg)](https://www.npmjs.com/package/ellmos-codecommander-mcp)
 [![CodeCommander tests](https://github.com/ellmos-ai/ellmos-codecommander-mcp/actions/workflows/tests.yml/badge.svg)](https://github.com/ellmos-ai/ellmos-codecommander-mcp/actions/workflows/tests.yml)
 [![Vitest](https://img.shields.io/badge/Vitest-175%20passed-brightgreen.svg)](https://vitest.dev/)
-[![Node.js](https://img.shields.io/badge/node-%3E%3D18-brightgreen.svg)](https://nodejs.org/)
+[![Node.js](https://img.shields.io/badge/node-%3E%3D20-brightgreen.svg)](https://nodejs.org/)
 [![Ecosystem](https://img.shields.io/badge/ellmos--ai-Ecosystem-blue.svg)](https://github.com/ellmos-ai)
 [![Umbrella](https://img.shields.io/badge/open--bricks-Umbrella-purple.svg)](https://github.com/open-bricks)
 [![LLM Indexing](https://img.shields.io/badge/LLM--Ready-llms.txt-blue.svg)](llms.txt)
@@ -106,7 +106,7 @@ While FileCommander handles filesystem operations, CodeCommander focuses on **co
 
 ### Prerequisites
 
-- [Node.js](https://nodejs.org/) 18 or higher
+- [Node.js](https://nodejs.org/) 20 or higher
 
 ### Option 1: Install from NPM
 

README_de.md

@@ -13,7 +13,7 @@
 [![npm version](https://img.shields.io/npm/v/ellmos-codecommander-mcp.svg)](https://www.npmjs.com/package/ellmos-codecommander-mcp)
 [![CodeCommander tests](https://github.com/ellmos-ai/ellmos-codecommander-mcp/actions/workflows/tests.yml/badge.svg)](https://github.com/ellmos-ai/ellmos-codecommander-mcp/actions/workflows/tests.yml)
 [![Vitest](https://img.shields.io/badge/Vitest-175%20passed-brightgreen.svg)](https://vitest.dev/)
-[![Node.js](https://img.shields.io/badge/node-%3E%3D18-brightgreen.svg)](https://nodejs.org/)
+[![Node.js](https://img.shields.io/badge/node-%3E%3D20-brightgreen.svg)](https://nodejs.org/)
 [![Ecosystem](https://img.shields.io/badge/ellmos--ai-Ecosystem-blue.svg)](https://github.com/ellmos-ai)
 [![Umbrella](https://img.shields.io/badge/open--bricks-Umbrella-purple.svg)](https://github.com/open-bricks)
 [![LLM Indexing](https://img.shields.io/badge/LLM--Ready-llms.txt-blue.svg)](llms.txt)
@@ -107,7 +107,7 @@ Während FileCommander Dateisystem-Operationen übernimmt, konzentriert sich Cod
 
 ### Voraussetzungen
 
-- [Node.js](https://nodejs.org/) 18 oder höher
+- [Node.js](https://nodejs.org/) 20 oder höher
 
 ### Option 1: Installation über NPM
 

llms.txt

@@ -4,7 +4,7 @@
 
 Core capabilities: Python AST-based class/method extraction with complexity metrics, BACH-derived method guardrails, import analysis, runtime import diagnostics in isolated Python subprocesses, structural Python edits with preview/test/apply modes, optional inline class/helper blocks for LLM context packaging, BACH-derived indentation diagnostics and Python code generation templates, JSON repair (trailing commas, single quotes, BOM, comments), PEP 8 import sorting and deduplication, Mojibake/double-encoded UTF-8 repair (27+ patterns), German umlaut repair (70+ patterns), format conversion across JSON / CSV / INI / YAML / TOML / XML / TOON, unified diff output (LCS algorithm), regex tester with match details and replace preview, Markdown-to-HTML/PDF export with code blocks, tables, nested lists, and blockquotes. Cross-platform: Windows, macOS, Linux.
 
-Node.js >= 18, MIT. Published as `ellmos-codecommander-mcp` on npm. Visible on Glama at `https://glama.ai/mcp/servers/b9kjs4uaav`. MCP Registry metadata is provided in `server.json` for the namespace `io.github.ellmos-ai/ellmos-codecommander-mcp`.
+Node.js >= 20, MIT. Published as `ellmos-codecommander-mcp` on npm. Visible on Glama at `https://glama.ai/mcp/servers/b9kjs4uaav`. MCP Registry metadata is provided in `server.json` for the namespace `io.github.ellmos-ai/ellmos-codecommander-mcp`.
 
 ## Docs
 

package-lock.json

@@ -84,6 +84,6 @@
     "vitest": "^3.2.6"
   },
   "engines": {
-    "node": ">=18.0.0"
+    "node": ">=20.0.0"
   }
 }