Ultra high-performance secp256k1 ECC engine | Python, Node.js, Rust, Go, C#, Swift, Java bindings | CUDA, Metal, OpenCL GPU | ECDSA, Schnorr, FROST, MuSig2, BIP-352 | 15+ platforms
Latest release v4.6.2 — UltrafastSecp256k1 v4.6.2 · 27 Sept 2026
4 files for Claude Code, GitHub Copilot, Codex and OpenCode: UltrafastSecp256k1, UltrafastSecp256k1 copilot-instructions.md, UltrafastSecp256k1 AGENTS.md, UltrafastSecp256k1 CLAUDE.md — 4,659 tokens loaded in every session.
.github/copilot-instructions.md A 1,443 tok AGENTS.md A 1,439 tok CLAUDE.md A 1,777 tok .claude/settings.json A — These files are shrec/UltrafastSecp256k1's own configuration — they tell Claude Code, GitHub Copilot, Codex and OpenCode how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.