refactor(api): build zarr.open, open_array and open_group on one metadata reader - #4366

Open

d-v-b wants to merge 18 commits into

zarr-developers:mainfrom

d-v-b:claude/open-single-probe-v2

Commits on Sep 16, 2026

perf(api): read metadata once when zarr.open falls back to a group
d-v-b
committed
a110f50
docs: add changelog fragment for #4366
d-v-b
committed
aa760ce
refactor(array): derive from_zarr_json instead of storing it
d-v-b
committed
14663af
refactor(array): make _MetadataDocs a TypedDict so presence means "read"
d-v-b
committed
358672b
refactor(array): report what the probe found as a node_type literal
d-v-b
committed
e3a89c9
refactor(array): model the reads as state and interpret them with plain functions
d-v-b
committed
0ddfcfd
perf(group): read only what the found format needs after a pre-fetch
d-v-b
committed
387c192
perf(api): give zarr.open a Zarr format 3 path and a format 2 fallback
d-v-b
committed
821cc21
refactor(api): build zarr.open, open_array and open_group on one metadata reader
d-v-b
committed
3498a97
refactor(group): compose read_node_metadata from per-format readers
d-v-b
committed
80243e9

Commits on Sep 17, 2026

refactor(group): read only the documents an opener's kind needs
d-v-b
committed
c94a6e6
test(api): check the whole option space of zarr.open against its contract
d-v-b
committed
229fb1e
fix(api): act on the audit of the open restructure
d-v-b
committed
64f7cfb
refactor(group): the format 2 consolidated key is .zmetadata; fetching it is a bool
d-v-b
committed
40c74fe
test: drop an unused variable the linter in CI caught
d-v-b
committed
9cc9140
Merge branch 'main' into claude/open-single-probe-v2
d-v-b
authored
fd5b1c0
fix(errors): export NodeNotFoundError
d-v-b
committed
1e76856
docs: make the release note visible and lead with the migration
d-v-b
committed
729b9f3