The multi-candidate decode response leaked provider internals (source name,
pcat car ids, EMEX _ssd/_vid/_quickGroupsUrl/catalogId) and made the client
carry them between requests: the frontend stored candidateSource and echoed
pcatCarId/emexCarIndex back on selection.
Now the candidate list returned to the client carries only display fields
(name, description, parameters) plus an opaque key, and the provider mapping
is stashed in Redis (vin:candidates:*, 30m TTL, resolve-cache fallback). The
pick request sends just { vin, candidate }. Legacy pcatCarId/emexCarIndex
body params still work for already-loaded bundles.
Also drops `source` from the public /vehicles/preview response — no consumer
used it, and provider names must never be public (same policy as
teaser-stats).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Semih Yesilyurt
2077a9724a