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New page commands_musig2.rst covering INS 0xC7 (NonceGen), INS 0xC8 P1=01 (LoadCosignerKey), INS 0xC8 P1=02 (PartialSign), with the BIP-327 protocol state machine and PIN gating on all three. CHECK USER KEY page updated for the new challenge-persistence behavior: the challenge nonce survives an applet deselect (host can disconnect and re-open a Secure Channel between P1=1 and P1=2), strict single-use on P1=2 (consumed on success and failure), and the allowlist of commands that can run while a challenge is active without invalidating it. Overview table gets a new MuSig2 section. Index toctree updated.
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commands_musig2.rstpage for MuSig2 (BIP-327):NONCE GEN(0xC7),LOAD COSIGNER KEY(0xC8 P1=01),PARTIAL SIGN(0xC8 P1=02), with the protocol state machine and PIN gating on all three.CHECK USER KEYupdated: challenge nonce survives applet deselect (host can disconnect between P1=1 and P1=2), strict single-use on P1=2, allowlist of commands that may run while a challenge is active.