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SIMD-0506 Upgrade secp256k1 to k256 (Agave-specific)

ReviewCoreStandardcreated 2026-03-27

Authors: Sam Kim, Zhenfei Zhang

Transition the secp256k1 precompile and syscall implementation in the Agave validator client from the libsecp256k1 crate to the k256 crate. This is an Agave-specific upgrade, but make this upgrade behind a feature gate for safety.

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What the proposal covers

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