A user who picked `deepseek-v4.1-flash` on their own custom endpoint kept
landing on `deepseek-v4-flash-0731`. Three sites each "helped" by diffing
the pick against a catalog and moving it:
- hermes_cli/models_validate.py: the shared catalog matcher auto-corrected
any id within difflib ratio 0.9 of a listed one (`corrected_model`), and
model_switch applied it. Version bumps, dated snapshots and qualifiers
all sit inside 0.9 of a sibling, so a newer release the listing lacked
was swapped for the older one under the user's label. The matcher now
does exact membership -> suggestion text only; the id goes to the wire
verbatim and a genuine typo is refused with the listed siblings named.
Every branch that carried the correction (live listing, static catalog,
curated fallback, MiniMax, Anthropic, custom, OpenRouter preset base)
loses it in one place.
- hermes_cli/model_switch.py: a `providers.<key>` endpoint reached by its
bare key (the slug Desktop picker rows carry) validated as a built-in
and hit the hard-rejecting live-listing branch; the same endpoint as
`custom:<key>` soft-accepted. Both spellings now validate as the user's
custom endpoint.
- apps/desktop: `manualPickRemoved` (composer reseed) and
`reconcileSelectionAfterCatalogRefresh` (Refresh Models) retargeted a
sticky pick to the profile default / the row's first model whenever the
provider row did not list it. Rows are hints (discovered, curated,
capped); the gateway's switch result is the only authority on a pick.
Both helpers are removed; the pick stays put.
Tests: change-detectors pinning the swap are rewritten as invariants
(never `corrected_model`; unlisted id on a user endpoint is kept and
warned; typo is refused with a suggestion); proven red on origin/main.
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