docs: add AI disclosure like the other Werkstattbox repos

AI_DISCLOSURE.md

@@ -0,0 +1,28 @@
+# AI Assistance Disclosure
+
+Parts of the code in this repository were written or refined with the assistance of
+[Claude Code](https://claude.ai/code) (Anthropic). All AI-generated or AI-assisted
+code has been reviewed, tested, and is the responsibility of the human contributors
+to this project.
+
+---
+
+## What this means
+
+- **Authorship:** AI was used as a coding assistant. Final decisions on architecture,
+  logic, and implementation were made by human developers.
+- **Review:** AI-assisted code is subject to the same review standards as all other
+  contributions.
+- **Responsibility:** The project maintainers are responsible for the correctness,
+  security, and licensing compliance of all code in this repository, regardless of
+  how it was produced.
+
+## What this does not mean
+
+- That the codebase was generated wholesale by an AI.
+- That AI output was accepted without review.
+- That any third-party IP or training data is reproduced here.
+
+---
+
+_This disclosure is provided in the interest of transparency._

README.md

@@ -1,5 +1,7 @@
 # formtransform
 
+[![AI-Assisted](https://img.shields.io/badge/AI--assisted-Claude%20Code-blueviolet?logo=anthropic&logoColor=white)](./AI_DISCLOSURE.md)
+
 One library to transform surveys between the standards of the CDL survey
 ecosystem — **XLSForm** (Kobo Toolbox), **LimeSurvey TSV**, and **DDI
 Codebook** — built on a canonical survey type registry (`registry/`) that
@@ -203,6 +205,10 @@ npm run bless
 - [Pipeline Documentation](src/pipelines/README.md) — Transformation pipeline details
 - [Test Documentation](tests/README.md) — Test structure and running tests
 
+## AI Disclosure
+
+See [AI_DISCLOSURE.md](./AI_DISCLOSURE.md).
+
 ## License
 
 MIT