Monthly issue metrics report

[github-actions]

Issue Metrics

Metric	Average	Median	90th percentile
Time to first response	1 day, 10:08:08	0:20:05	4 days, 10:42:54
Time to first review	None	None	None
Time to close	3 days, 23:58:44	3 days, 1:52:57	8 days, 18:33:15
Time to answer	None	None	None

Metric	Count
Number of items that remain open	11
Number of items closed	7
Total number of items created	18

Title	URL	Assignee	Author	Time to first response	Time to first review	Time to close	Time to answer
zarr-metadata: add unions of metadata objects for core + extensions	#4095	None	d-v-b	None	None	None	None
test_multiprocessing[fork] fails on Python 3.15	#4086	None	QuLogic	0:20:38	None	None	None
Bytes codec does not roundtrip cleanly	#4073	None	clbarnes	0:19:32	None	5 days, 23:56:05	None
Use non-consumable iterators for test fixtures	#4065	None	d-v-b	9 days, 15:47:37	None	9 days, 15:47:37	None
Numpy-compatible typevars in array classes?	#4061	None	sneakers-the-rat	10:06:49	None	None	None
User-provided attributes dictionary is mutated by the public API	#4059	None	stibrew	0:00:49	None	1:30:28	None
[docs] very basic zarr tutorial -- "zarr for absolute beginners"	#4056	chuckwondo	d-v-b	None	None	None	None
upgrade home-built sentinel to typing_extensions.Sentinel	#4045	None	d-v-b	None	None	3 days, 1:52:57	None
broken xarray downstream tests	#4044	None	d-v-b	None	None	6:05:11	None
Public API for determining if an array is sharded	#4036	None	maxrjones	0:06:13	None	None	None
Public API for determining chunk grid type	#4035	None	maxrjones	None	None	None	None
ObjectStore.list_dir("g") raises ValueError when an object keyed "g/" exists	#4032	None	blinkybool	None	None	None	None
VerboseModule cannot be pickled	#4029	None	vladidobro	0:02:14	None	None	None
fold AsyncArray methods into Array	#4027	None	d-v-b	3 days, 20:49:03	None	None	None
update dtype example to use public API	#4026	d-v-b, chuckwondo	d-v-b	5:47:54	None	8 days, 4:23:41	None
Move rectilinear chunk grid from experimental to stable	#4025	None	maxrjones	0:00:32	None	None	None
[tool.hatch.envs.defaults] is likely a typo for default — installer = "uv" never applies	#4022	None	lhoupert	None	None	18:15:08	None
Monthly issue metrics report	#4021	None	github-actions[bot]	None	None	None	None

This report was generated with the Issue Metrics Action
Search query used to find these items: repo:zarr-developers/zarr-python is:issue created:2026-06-01..2026-06-30 -reason:"not planned"