Google: additive add/remove for keywords and negative keywords (not full-set replacement)

Today targeting.keywords / targeting.negativeKeywords on PUT /v1/ads/{adId} replace the entire set of that kind on the ad group — anything not sent is removed. That is the right primitive for a campaign builder, but it is a dangerous
one for any tool that acts on a suggestion.

Our use case: we analyse a customer's search terms and propose "exclude these three wasteful terms". To execute that today we must re-send the ad group's complete keyword inventory, correctly, including match types. If our inventory is
one sync behind — a paginated sync that hit a 429, a keyword added in Google Ads five minutes ago — we silently delete working keywords and spend the customer's money in the wrong places. There is no way to detect that after the fact.

Request: an additive shape, e.g. targeting.addKeywords / targeting.removeKeywords (and the same for negatives), or a PATCH-style operation list. Removal by keyword text + match type would be enough; a criterion ID would be even better.

Why it matters beyond us: any agent or advisory layer built on your API runs into this. Full replacement forces every integrator to maintain a perfectly fresh mirror of the platform's state, which is exactly the thing an API should not
require.