xpile-contract-backend 0.1.37

Contract backend trait — proof-lane sibling of Backend. Renders contracts as LaTeX / Lean theorems / mdBook.
Documentation

ContractBackend trait — proof-lane rendering abstraction.

Renders parsed [xpile_contracts::Contract] into LaTeX (math + theorem environments), Lean 4 theorem text (with @[xpile_contract] attribute carrying the verbatim contract ID), or mdBook.

Architectural invariants codified in contracts/xpile-contract-backend-trait-v1.yaml. The citation bridge uses format-native structured constructs parseable by the host elaborator/parser, NOT regex over body text. See docs/specifications/sub/contract-backend-trait.md §"Citation bridge".