Index posts' tags in Typesense

posts-tag-index.php

<?php
add_filter( 'cm_typesense_schema', 'your_slug_add_tags', 10, 2 );
function your_slug_add_tags( $schema, $name ) {
	if( 'post' === $name ) {
		$schema['fields'][] = [ 'name' => 'tags', 'type' => 'string[]', 'facet' => true ];
	}
	return $schema;
}

add_filter( 'cm_typesense_data_before_entry', 'your_slug_tags_data', 10, 4 );
function your_slug_tags_data( $formatted_data, $raw_data, $object_id, $schema_name ) {
	if( 'post' === $schema_name ) {
		$tags     = get_the_tags( $raw_data->ID );
		$tag_names = [];
		if ( ! empty( $tags ) ) {
			foreach ( $tags as $tag ) {
				$tag_names[] = html_entity_decode( $tag->name );
			}
		}
		$formatted_data['tags'] = is_array( $tag_names ) && ! empty( $tag_names ) ? array_values( array_unique( $tag_names ) ) : [];
	}
	return $formatted_data;
}