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decimal: add a native arbitrary-precision decimal engine - #8699

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moreal wants to merge 7 commits into

RustPython:mainfrom

moreal:agent/decimal-native-engine

Closed

decimal: add a native arbitrary-precision decimal engine#8699
moreal wants to merge 7 commits into
RustPython:mainfrom
moreal:agent/decimal-native-engine

Commits on Sep 13, 2026
- decimal: add a native arbitrary-precision decimal engine
  moreal
  committed
  27f54ce
- _decimal: ship the native engine as decimal's accelerator
  moreal
  committed
  db717b0
- decimal: fix rounding, overflow, and unbounded-allocation bugs from review
  
  moreal
  and
  claude
  committed
  9343fcf
- decimal: fix two interpreter-aborting crashes from a second review pass
  
  moreal
  and
  claude
  committed
  b04719c
- decimal: guard clamp coefficient growth, propagate next_plus/minus malloc errors
  
  moreal
  and
  claude
  committed
  b1d9776
- decimal: guard fixed-point rescale allocation, fix from_number subclassing
  
  moreal
  and
  claude
  committed
  a2a969e
- decimal: restore SignalDict's mutable-mapping surface
  
  moreal
  and
  claude
  committed
  64d35ac