The public type-tag registry is frozen at the following assignments:

Tag	Type	Introduced	Payload after the tag
0 (0x00)	i1	13.1	None
1 (0x01)	i8	13.1	None
2 (0x02)	i16	13.1	None
3 (0x03)	i32	13.1	None
4 (0x04)	i64	13.1	None
5 (0x05)	f16	13.1	None
6 (0x06)	bf16	13.1	None
7 (0x07)	f32	13.1	None
8 (0x08)	tf32	13.1	None
9 (0x09)	f64	13.1	None
10 (0x0a)	f8E4M3FN	13.1	None
11 (0x0b)	f8E5M2	13.1	None
12 (0x0c)	Pointer	13.1	pointer_payload; extended in 13.4
13 (0x0d)	Tile	13.1	tile_payload
14 (0x0e)	TensorView	13.1	tensor_view_payload; extended in 13.4
15 (0x0f)	PartitionView	13.1	partition_view_payload; optional-field encoding changed in 13.3
16 (0x10)	Function	13.1	function_payload
17 (0x11)	Token	13.1	None
18 (0x12)	f8E8M0FNU	13.2	None
19 (0x13)	f4E2M1FN	13.3	None
20 (0x14)	GatherScatterView	13.3	gather_scatter_view_payload
21 (0x15)	StridedView	13.3	strided_view_payload
22 (0x16)	i4	13.3	None

Values outside this table are not public type tags. Internal and test builds may define tags in separate reserved ranges; those assignments are not part of the public bytecode registry.