Add DCNv2 + JointFusionModel (nuFormer-style Transformer + tabular fusion)

Add PLR embeddings (Gorishniy et al. 2022)

Add DomainTransformerForCausalLM — GPT-style NoPE model with SDPA attention, weight tying, HF Trainer compatible

Add DomainTransformerConfig with presets (24M/85M/330M)

Phase 2B: Model architecture — DomainTransformerForCausalLM (NoPE, GPT-style), PLR embeddings, DCNv2 + JointFusion, 105 passing tests

Add comprehensive test suite — 72 passing tests covering all components

Add predefined schemas (FINANCE, ECOMMERCE, HEALTHCARE)

Add domain_tokenizer.py — DomainTokenizerBuilder (core assembler, HF integration)

Add field_tokenizers.py — Sign, MagnitudeBucket, Calendar, Categorical, DiscreteNumerical tokenizers

Add tokenizers package init

Add schemas package init

Add schema.py — DomainSchema, FieldSpec, FieldType definitions

Phase 2A: Core tokenizer library — schema, field tokenizers, composite builder, predefined schemas, 72 passing tests

Update README: add ADR reference, update documentation table and repo structure

Add ADR-001: Implementation framework decision with detailed roadmap

Update README with Nubank case study and expanded repo structure

Add Nubank nuFormer reverse-engineering analysis — full pipeline reconstruction

Add README with project overview and vision

Add comprehensive research report on domain-specific tokenization

initial commit