Declarative checkpoint config conversion (Llama pilot)#508

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jlamypoirier wants to merge 16 commits intomainfrom

jlp_simplify_conversion

Commits on May 5, 2026

Reclassify architecture-impacting fields under FieldHint.architecture

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Add declarative ConfigConverter primitives and section-converter ABC

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Migrate Llama config converters to declarative primitives

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Commits on May 6, 2026

Address PR review: validator hook + cleanup

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Mark PatternBlockSequenceConfig.blocks as architecture

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Extend converter framework with nested-HF and typed-dict primitives

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Migrate Apriel2 config converters to declarative primitives

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Migrate Mistral / Qwen2 / MTP-Llama config converters to declarative primitives

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Migrate Mixtral config converters to declarative primitives

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Migrate Apriel hybrid SSM mixer config converters to declarative primitives

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Migrate Pixtral normalization and embeddings config converters to declarative primitives

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Remove unused weight-converter scaffolding

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Commits on May 7, 2026

Self-review fixes

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Address review feedback

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Commits on May 8, 2026

Address second review round

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Address third review round

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