cordelbr-grounded-adapter

CordelBR-Grounded — Factually-Verified Brazilian Cordel Poetry Adapter

LoRA adapter fine-tuned on Mixtral-8x7B-Instruct-v0.1 (46.7B total / 12.9B active parameters, sparse mixture-of-experts) for closed-book, factually-grounded generation of traditional Brazilian cordel poetry, via Adaption's AutoScientist platform.

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The problem this adapter addresses

General-purpose LLMs asked to write culturally-grounded poetry from a source text routinely do one of two things under rhyme and meter pressure: invent plausible-sounding facts not present in the source, or distort real facts, institutional names, and grammar to force a rhyme. Given the same source text about the Feira de Caruaru, an ungrounded model might:

truncate an official name to fit the meter — writing "Livro de Lugar" when the source says "Livro de Registro de Lugar" — or bend a real word out of its natural sense to close a rhyme, e.g. forcing "centavo" ("cent") into a line about a river sustaining "vida e agricultura" ("life and agriculture") just because it rhymes with "bravo".

This adapter is trained to extract only facts explicitly present in a given source, preserve official institutional names in full, and rewrite the rhyme scheme rather than distort meaning when a natural rhyme isn't available.

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Training metrics

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AutoScientist evaluation

The category-wide result (+12 points, ~27% relative improvement) is the more robust figure — measured across the full category's held-out tasks, not just this dataset's 10 rows.

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Dataset

10 instruction/output pairs across 4 institutional sources:

Verification pipeline (6 stages)

Candidates falling short went through a validator-guided repair loop before re-evaluation.

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Institutional sources

• IPHAN — Dossiê Feira de Caruaru: http://portal.iphan.gov.br/uploads/ckfinder/arquivos/Dossie_feira_de_caruaru.pdf
• IPHAN — Frevo, Patrimônio Cultural da Humanidade: http://portal.iphan.gov.br/noticias/detalhes/767/frevo-pernambucano-e-patrimonio-da-humanidade
• ICMBio — Bioma Caatinga: https://www.gov.br/icmbio/pt-br/assuntos/biodiversidade/unidade-de-conservacao/unidades-de-biomas/caatinga
• Lampião e Maria Bonita — história do cangaço (synthesis of public data attributed to Fundação Joaquim Nabuco): https://www.todadisciplina.com.br/lampiao/

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Credits

• Fine-tuning platform: Adaption — AutoScientist & Adaptive Data
• Challenge: AutoScientist Challenge 2026
• Training infrastructure: Adaption compute credits
• Data preparation: Deduplicated via Adaption Adaptive Data (Prompt Deduplication recipe); trained on the pipeline's Original completion — Adaption's Enhanced remastering was measured to reduce quality by -11.3% in testing and was not used.
• Author: Fernando Rodrigues · Kaggle: fernandosr85 · HuggingFace: Fernandosr85

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Disclaimer

Experimental research artifact submitted to AutoScientist Challenge 2026 (Language category). This release covers 4 of 8 planned institutional sources; the remaining 4 (Maracatu Nação, Padre Cícero, Guerra de Canudos, Luiz Gonzaga) are in the source corpus and generation pipeline but had not yet cleared the fidelity gate at time of release. One source in this release (Lampião e Maria Bonita) covers a historically violent episode, presented per documented tone guidance — no glorification of violence, no graphic detail, historical ambiguity preserved rather than resolved. Outputs should be reviewed by a Portuguese-language poet or cultural expert before public or educational use.