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fil/docs/snippets/elixir/plugins/extractor_registration.md
Henrik Jess Nielsen b4c07d3693
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<!-- snippet:skip reason="Elixir Rustler NIFs cannot host async Send + Sync + 'static Rust trait objects via callbacks; the BEAM actor-model boundary requires plugin work to live in the Rust core. The alef-generated Elixir trait_call macro additionally has a backslash/encoding bug (separate alef-codegen ticket). Custom plugins must be implemented in Rust." -->
Document extractor registration is not available in the Elixir binding. Custom extractors must be implemented in Rust using the `DocumentExtractor` trait and registered in the Rust core.
To use custom extractors in Elixir:
1. Implement the extractor in Rust using the `DocumentExtractor` trait
2. Register the extractor in the Rust core's registry
3. Call the extraction functions from Elixir
See the Rust plugin documentation for implementing custom `DocumentExtractor` plugins.