diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
index a734bea..cf008f2 100644
--- a/.github/copilot-instructions.md
+++ b/.github/copilot-instructions.md
@@ -1,5 +1,20 @@
 # Development instructions
-
+- This is a personal project that will only ever be used by me. No public distribution is planned.
+- The project is written in PHP and targets Dokuwiki.
+- Follow general PHP best practices.
+- Follow Dokuwiki coding conventions: https://www.dokuwiki.org/devel
 - Do not use `phpunit` There are missing dependencies that make it fail.
 - Use `php -l <file>` to check for syntax errors.
-- Consider The official documentation for writing dokuwiki plugins: https://www.dokuwiki.org/devel:plugins
\ No newline at end of file
+- Consider The official documentation for writing dokuwiki plugins: https://www.dokuwiki.org/devel:plugins
+
+
+# General instructions
+- This plugin is inteded to be used by me for many years to come
+- That means maintainability is more important than cutting edge technologies
+- Write code that is easy to understand and modify
+- Favor stability over performance unless performance is a clear requirement
+- Favor simplicity over cleverness
+- Favor explicitness over implicitness
+- Favor well-known solutions over new or exotic solutions
+- Favor documented solutions over undocumented solutions
+- Favor built-in solutions over external dependencies
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