[FEAT]: Add structured prompt template validation#120
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Return an immutable PromptTemplate from the YAML loader, validate declared render parameters against both call arguments and the Jinja AST, and add focused unit coverage for metadata and parameter errors.
Replace manual prompt-template schema checks with a strict private Pydantic model, wrap validation failures in a domain exception, reject unknown fields and duplicate parameters, and declare Pydantic as a direct dependency.
Adds PromptTemplate.from_yaml(), private loading and compilation stages, generic uniqueness validation, explicit module exports, migrated consumers, and raw YAML coverage.
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Description
Adds a structured
PromptTemplatemodel with validated YAML loading and rendering.jinja2.Templateloading withPromptTemplate.from_yaml().LLMDriverandLLMJudgeto the structured template API.Breaking changes
load_prompt_template()has been removed in favor ofPromptTemplate.from_yaml().The loader now returns a
PromptTemplaterather than ajinja2.Template; callers using Jinja-specific APIs must migrate to the structured API.Checklist
pre-commit run --all-filespasses