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Implement multi-head attention from scratch.

Single-head attention is common; multi-head adds the split-into-heads, attend-per-head, concatenate structure. The signal is the reshape into heads and a clear reason why multiple heads help. Here is the implementation.

Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.

Single-head attention is common; multi-head adds the split-into-heads, attend-per-head, concatenate structure. The signal is the reshape into heads and a clear reason why multiple heads help. Here is the implementation.

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