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.claude/skills/wp-plugin-development/references/settings-api.md

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+# Settings API (admin options)
+
+Use this file when adding settings pages or storing user-configurable options.
+
+Core APIs:
+
+- `register_setting()`
+- `add_settings_section()`
+- `add_settings_field()`
+
+Upstream references:
+
+- Settings API overview: https://developer.wordpress.org/plugins/settings/settings-api/
+- Register settings: https://developer.wordpress.org/plugins/settings/registration/
+- Add settings fields: https://developer.wordpress.org/plugins/settings/settings-fields/
+
+Practical guardrails:
+
+- Use `sanitize_callback` to validate/sanitize data.
+- Use capability checks (commonly `manage_options`) for settings screens and saves.
+- Escape values on output (`esc_attr`, `esc_html`, etc.).
+