refactor: experimental repodata v3 - #2093
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Remove the packages.whl top-level key from RepoData, Shard, and PatchInstructions. Wheel packages should now be stored under experimental_v3.whl instead.
wolfv
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Feb 20, 2026
Add a new `v3` top-level key to repodata that uses extension-less `ArchiveIdentifier` keys (name-version-build) with `tar.bz2`, `conda`, and `whl` sub-keys. This enables a backwards-compatible path for evolving the repodata format. Changes: - Add `ExperimentalV3Packages` struct with tar_bz2, conda, whl sub-maps - Add `experimental_v3` field to `RepoData`, `Shard`, and `PatchInstructions` - Add `DistArchiveIdentifier::new()` constructor - Update sparse loader with `LazyV3Packages` for deferred parsing - Update sharded subdir gateway to chain v3 packages - Update `SubdirRunExportsJson` to look up v3 run exports - Migrate test data from `packages.whl` to `v3.whl` format
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Description
This PR implements experimental support for a combination of:
v3ceps#146The PR introduces the "v3" key in repodata (including shards) with subkeys "conda", "tar.bz2", and "whl". Things still missing are:
info.repodata_revisionsas defined in CEP XXXX: A backwards-compatible repodata update strategy for repodatav3ceps#146. I kept this out because the current CEP document doesn't reflect our latest conversations.Caution
Breaking: The
packages.whlkey is no longer supported. Any repodata usingpackages.whlmust migrate wheel records to v3.whl. This affects the experimental wheel support that was not yet widely deployed.Note that the syntax for conditional dependencies has also changed in #2007 to follow the CEPs more closely.
@danyeaw This will affect your work.
How Has This Been Tested?
CI runs tests that should verify correctness.
AI Disclosure
Tools: Claude Code Opus 4.6 Extended
Checklist: