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.agents/skills/wp-plugin-development/references/lifecycle.md

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+# Activation, deactivation, uninstall
+
+Use this file for lifecycle changes and data cleanup.
+
+## Activation / deactivation hooks
+
+- `register_activation_hook( __FILE__, 'callback' )`
+- `register_deactivation_hook( __FILE__, 'callback' )`
+
+Guardrails:
+
+- These hooks must be registered at top-level (not inside other hooks).
+- If you flush rewrite rules, ensure rules are registered first (often via a shared function called both on `init` and activation).
+
+Upstream reference:
+
+- https://developer.wordpress.org/plugins/plugin-basics/activation-deactivation-hooks/
+
+## Uninstall
+
+Preferred approaches:
+
+- `uninstall.php` (runs only on uninstall)
+- `register_uninstall_hook()`
+
+Guardrails:
+
+- Check `WP_UNINSTALL_PLUGIN` before running destructive cleanup.
+
+Upstream reference:
+
+- https://developer.wordpress.org/plugins/plugin-basics/uninstall-methods/
+