Apply original-tweet civic labels when scoring retweets - #158
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Apply original-tweet civic labels when scoring retweets#158Pitchfork-and-Torch wants to merge 1 commit into
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VF hydrated safety labels only for the requested wrapper id. A civic-integrity label on the original never reached FosnrCivicIntegrityDropRule, so Following and in-network For You kept the retweet. Fetch the source tweet's labels, union them onto the wrapper, and fail closed when that read is Err or omitted. Co-authored-by: Jon Bailey <Pitchfork-and-Torch@users.noreply.github.com>
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September 7, 2026 05:26
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Bug
VF
SafetyLabelHydratorlooks up labels only for the requested tweet ids. A retweet wrapper hassource_tweet_idafter TES, but civic / FOSNR / misinfo labels live on the original.FosnrCivicIntegrityDropRulecheckshas_safety_labelon the wrapper, so Following and in-network For You keep a retweet of a civic-integrity labeled post.UTH says FOSNR_CIVIC_INTEGRITY restricts discoverability to the author's profile. Hate / abuse / violent-speech stay on TimelineHome for the same reason. This is not #109 (civic table move to OON). This is not #115 (Following quotes at TimelineHome). This is not #119 (home-mixer primary lookup by wrapper id). This is not #121 / #139 (primary VF or wrapper label Err).
When the original is not in the same VF batch, the source label read was never issued. When it is issued and returns Err or omits the id, this change fails closed (omit wrapper →
unresolved_authorDrop). Confirmed-empty original stays unlabeled.Five-line proof
HydrationPipeline::hydrate/apply_source_tweet_safety_labels(TESsource_tweet_id)FosnrCivicIntegrityDropRule→VFFilterAction::Drop/PossiblyUndesirableAdsBrandSafetyVfHydratoralready usesretweeted_tweet_id.unwrap_or(tweet_id)Survey (#96–#142)
source_tweet_id.Tests
retweet_inherits_confirmed_civic_label_from_originalretweet_source_label_err_fails_closed(fails open on unmodified main: source never fetched)confirmed_unlabeled_original_does_not_fail_closedcivic_integrity_retweet_with_source_label_drops/ golden corpus Home + Recsunion_adds_civic_without_dropping_existingcargo testcannot run. Public dump has no VF crate manifest.Fork PR: none