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Kwel-vrae

Does it create database tables or store plugin data?

No. The plugin only generates rewrite rules and filters URLs. Nothing is stored beyond WordPress’s own rewrite rules cache.

Can I choose which taxonomies and CPTs are affected?

Yes, via the lbp_config filter. Plain values declare a taxonomy whose base will be stripped. String keys declare a CPT => taxonomy association — the taxonomy base is also stripped, and the CPT permalinks are built from the term path.

add_filter( 'lbp_config', function() {
    return [
        'category',                 // strip base from this taxonomy
        'post_tag',                 // strip base from this taxonomy
        'my_cpt' => 'my_taxonomy',  // strip base + build CPT permalinks from term path
    ];
} );

Without this filter, the plugin auto-detects all public custom taxonomies, including category and post_tag, and CPTs.