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+ Current operation
+ size
+ buckets
+ load
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+ key input
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+ keyHash
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+ bit mask
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+ bucket
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+ Hashtable.Entry[] bucketsfixed · no resize
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+ MutatingBucketIterator
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+ API map
Choose the smallest useful surface
D1 and D2 own size accounting. Support exposes the chain mechanics for custom higher-arity entries; its caller owns size and capacity policy.
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+ Trace it in the checkout
+Every animation maps to current source.
+The visual table uses eight buckets for readability. Production call sites choose their own fixed capacities—such as 64 tag buckets or a scaled aggregate working set.
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