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GSoC Developer Merges Two PRs Introducing New API Builder for SBI Library

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A Google Summer of Code contributor has successfully merged two pull requests, #1877 and #1882, into the gsoc-2026 branch of the SBI (simulation-based inference) library during weeks three and four of the coding period. The first PR introduces a DensityEstimatorBuilder class that replaces older factory closures with a typed, inspectable, and more robust system for creating neural networks. A key architectural decision was made to simplify the builder's interface by removing a premature BuildContext abstraction, after the mentor observed it was not yet needed. The second PR integrates the new builder into several NPE trainer classes while preserving backward compatibility through a FutureWarning for users still passing string arguments. Code review during this phase also provided the contributor with practical lessons on writing stronger, more explicit software tests.

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GSoC Developer Merges Two PRs Introducing New API Builder for SBI Library · ShortSingh