Desktop-bootstrap config validation used by the Claude Code gateway gains a new deprecated diagnostic kind, produced by a new detectDeprecations/describeDeprecation pass separate from the existing unknown/refused-key logic. Mapping a legacy flat key back to its canonical name now goes through flatConfigKeys/getFieldMeta(...).legacyFlatKey instead of the old resolveLegacyFlatKeys.
Gateway desktop bootstrap config now flags deprecated keys explicitly
Desktop bootstrap config validation now explicitly flags deprecated keys.
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
Bootstrap ConfigArea: what it touches
Internal ChangesKind: in v2.1.260,
Internal ChangesSection of the release