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## 5.80.2

**`(fix):`** Support `client-default` on `api.headers` entries in generators.yml. The
generators.yml schema previously dropped this field, so global headers with a
`client-default` produced no client-side default in the generated SDKs. The
field now flows through to the IR (`clientDefault`), so SDKs send the value by
default when the caller and environment variable do not provide one.