modernisierung-559-bgb SKILL.md skillA
modernisierung-559-bgb from borghei/ai-skills-german-law is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add borghei/ai-skills-german-law/modernisierung-559-bgb@git:20261023.b962266Pins git:20261023.b962266 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- borghei/ai-skills-german-law
- Path
mietrecht/skills/modernisierung-559-bgb/SKILL.md- Versions recorded
- 2
- Latest version
- git:20261023.b962266, committed Oct 23, 2026
- First version recorded
- Jul 21, 2026
- Size
- 20,415 bytes
- Repository stars
- 51
- License
- a license file GitHub does not identify
Modernisierung und Modernisierungsmieterhöhung im Wohnraummietrecht – Begriff der Modernisierungsmaßnahme § 555b BGB, Modernisierungsankündigung § 555c BGB, Duldungspflicht und Härteeinwand § 555d BGB, Aufwendungsersatz § 555a Abs. 3 BGB, Sonderkündigungsrecht § 555e BGB, Mieterhöhung nach § 559 BGB mit 8-%-Umlage, Heizungsanlage § 555b Nr. 1a BGB mit 10-%-Umlage § 559e BGB und Wärmepumpen-Nachweis § 559f BGB (GModG, seit 29.07.2026), vereinfachtes Verfahren § 559c BGB, Kappung § 559 Abs. 3a…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# /mietrecht:modernisierung-559-bgb ## Zweck Die Modernisierungsmieterhöhung ist das dauerhafteste Instrument des Vermieters — sie ist nicht an die ortsübliche Vergleichsmiete gebunden und wirkt einseitig ohne Zustimmung des Mieters. Genau deshalb ist sie an ein dichtes Verfahren gebunden: Ankündigung, Duldung, Härteprüfung, Umlage. Diese Skill führt durch die gesamte Kette von §§ 555a–555f BGB bis § 559b BGB und trennt scharf zwischen **Erhaltungsaufwand** (nicht umlagefähig) und **Modernisierung** (umlagefähig). Sie ist das Gegenstück zu `/mietrecht:mieterhoehung-558-bgb`: Dieselbe Wohnung, zwei völlig verschiedene Erhöhungsregime. Für den Heizungstausch (§§ 555b Nr. 1a, 559e, 559f BGB) gibt es die Vertiefung `/mietrecht:heizungstausch-559e-559f`. …
Read the whole file at its exact version.
How to install
mdr add borghei/ai-skills-german-law/modernisierung-559-bgb@sha256:9d5a8b9d37e48969The line at the top of this page pins the label git:20261023.b962266, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_l7nkfnk6kdmfmkht)
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Versions
The registry has recorded 2 versions of this file, between Jul 21, 2026 and Oct 23, 2026, about one every 94 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261023.b962266 latest | 2026-10-23 | b962266 | 20,415 B | A | view · diff |
| git:20260721.4cf2860 | 2026-07-21 | 4cf2860 | 15,366 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (20415 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
borghei/ai-skills-german-law · 51 stars · license a license file GitHub does not identify · pushed 2026-10-23 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_l7nkfnk6kdmfmkht GET https://markdownregistry.com/api/v1/resolve?ref=borghei/ai-skills-german-law/modernisierung-559-bgb GET https://markdownregistry.com/api/v1/blob/9d5a8b9d37e489694ef7c07e89a863e34a104ecb09d5d812701d5969f25576bc
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.