Update README

- add license section,
- add info about vibe coding at top
- add information about contacts search GET
- minor changes

README.md

@@ -1,5 +1,10 @@
 # AToCal — Add To Calendar
 
+> **Vibe-coded:** AToCal is written by Mistral AI's coding agent, not by hand.
+> The maintainer sets the goals, makes the product decisions and tries the app
+> out in the browser; there has been no independent human code review and
+> no security audit.
+
 A Nextcloud app that lets remote applications create events in the
 authenticated user's Nextcloud Calendar via a simple link.
 
@@ -21,8 +26,10 @@ remote app                  Nextcloud (atocal)
 ```
 
 The remote app links the user to the confirm page. The user reviews
-the event and submits the form. The event lands in the user's
-"Personal" calendar and the browser opens the Calendar app.
+the event and submits the form. The event lands in a calendar the user
+chooses. The user adds invitees/attendees to the event, who receive
+an invitation, as long as the user owns the calendar.
+After the event is created the browser opens the Calendar app.
 
 ## Routes
 
@@ -30,6 +37,7 @@ the event and submits the form. The event lands in the user's
 |--------|------|---------|
 | GET | `/apps/atocal/confirm` | Show confirmation page |
 | POST | `/apps/atocal/create` | Create the event |
+| GET | `/apps/atocal/contacts/search` | Contact search for the invitee input |
 
 ## Link parameters (GET `/confirm` and form POST `/create`)
 
@@ -43,6 +51,9 @@ the event and submits the form. The event lands in the user's
 | `url` | no | HTTPS URL; merged into description |
 | `organizer` | no | email address; display info only |
 
+The create form adds `calendarId` (selected calendar) and
+`attendees` (emails, max 20).
+
 Dates carry no timezone and are interpreted in the user's Nextcloud
 timezone (server default as fallback).
 
@@ -73,8 +84,7 @@ https://cloud.example.com/apps/atocal/confirm?summary=Kickoff&start=2026-10-12T1
 
 - Nextcloud 34 or 35
 - Calendar app enabled
-- A writable calendar named "Personal"
-  (event creation fails with a friendly error otherwise)
+- A writable calendar ("Personal" is preselected if present)
 
 ## Install
 
@@ -88,10 +98,18 @@ occ app:enable atocal
 ## Structure
 
 ```
-appinfo/info.xml          app metadata
-appinfo/routes.php        routes
-lib/AppInfo/Application.php   container setup
+appinfo/info.xml                        app metadata
+appinfo/routes.php                      routes
+css/style.css                           page styles
+js/invitees.js                          invitee input
+l10n/*.json                             translations
+lib/AppInfo/Application.php             container setup
 lib/Controller/CalendarController.php   confirm/create logic
-templates/confirm.php    confirmation page
-templates/style.css       page styles
+templates/confirm.php                   confirmation page
 ```
+
+## Licence
+
+AGPL-3.0-or-later, see LICENSE. AToCal comes without any warranty.
+
+AToCal is an independent project and is not affiliated with any other product or company of a similar name.