feat(platforms): validate __archspec microarchitecture names - #6701
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`__archspec` build strings name a CPU microarchitecture, not a version, and only names the bundled archspec database knows can ever be reported by a host. Pixi accepted anything, so a typo silently produced a platform that never matches -- and pixi's own docs suggested `x86-64-v3` and `armv8-a`, neither of which is a valid archspec name (conda build strings cannot contain '-'). Validate the name in every user-facing parser -- the friendly `archspec` key, the raw `__archspec = "version=build"` escape hatch, and `pixi workspace platform add/edit` -- through one shared helper, so the manifest and the CLI accept exactly the same values. Unknown names are rejected with a did-you-mean suggestion: the underscore spelling when that is what was meant, otherwise the closest database entry. Also collapses the three hand-rolled copies of the "empty or 0 means unknown microarchitecture" encoding into `archspec_microarchitecture`, and corrects the invalid examples in the docs, the JSON schema and the CLI help. BREAKING: a manifest declaring an unknown `__archspec` name now fails to parse instead of producing a platform no host can match.
baszalmstra
reviewed
Jul 28, 2026
hunger
changed the title
baszalmstra
enabled auto-merge (squash)
July 29, 2026 09:24
baszalmstra
approved these changes
Jul 29, 2026
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Description
These should be the uncontroversial parts of #6533:
A bug fix on how we handle extra
=in build strings and rejecting invalid archspecs when a user provides one.How Has This Been Tested?
Unit tests :-)
AI Disclosure
Tools: Claude
Checklist:
schema/model.py.