website/content/en/docs/reference/command-line-tools-reference/feature-gates/warning-headers.md

title	content_type	_build	stages	removed
WarningHeaders	feature_gate	list render never false	stage defaultValue fromVersion toVersion beta true 1.19 1.21 stage defaultValue fromVersion toVersion stable true 1.22 1.24	true

Allow sending warning headers in API responses.