Filter System Reference

Complete guide to the 12 filters that can hide your content before scoring.

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How Filtering Works

Before your post is even scored, it passes through filters:

Your Post → FILTERS → Scoring → Ranking → Feed
              │
              └── Removed posts never get scored

Key insight: A filtered post gets ZERO visibility, regardless of quality.

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The 12 Filters

Filter 1: Drop Duplicates Filter

What it does: Removes duplicate tweet IDs from the candidate pool.

When it triggers:

• Same tweet appears from multiple sources

How to avoid: N/A (system deduplication)

Source: drop_duplicates_filter.rs

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Filter 2: Core Data Hydration Filter

What it does: Removes posts missing essential data (author_id, tweet_text).

When it triggers:

• Technical issues with post data
• Corrupted or incomplete posts

How to avoid: N/A (technical filter)

Source: core_data_hydration_filter.rs

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Filter 3: Age Filter ⚠️

What it does: Removes posts older than maximum age threshold.

When it triggers:

• Post is too old

How to avoid:

• Post at peak times for immediate engagement
• Build engagement quickly after posting

Source: age_filter.rs

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Filter 4: Self Tweet Filter

What it does: Removes your own tweets from your For You feed.

When it triggers:

• You see your own tweet candidate

How to avoid: N/A (expected behavior)

Source: self_tweet_filter.rs

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Filter 5: Retweet Deduplication Filter

What it does: Keeps only first occurrence when multiple people retweet same content.

When it triggers:

• Same original content retweeted by multiple followed accounts

How to avoid: N/A (expected behavior)

Source: retweet_deduplication_filter.rs

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Filter 6: Ineligible Subscription Filter

What it does: Removes subscription-only posts from non-subscribers.

When it triggers:

• Post is behind subscription paywall
• Viewer isn’t subscribed to creator

How to avoid: N/A (subscription feature)

Source: ineligible_subscription_filter.rs

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Filter 7: Previously Seen Posts Filter

What it does: Removes posts the user has already seen.

When it triggers:

• User already saw this post

How to avoid: N/A (expected behavior)

Source: previously_seen_posts_filter.rs

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Filter 8: Previously Served Posts Filter

What it does: Removes posts already served in current session.

When it triggers:

• Post was already shown in current scroll session

How to avoid: N/A (expected behavior)

Source: previously_served_posts_filter.rs

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Filter 9: Muted Keyword Filter ⚠️ IMPORTANT

What it does: Removes posts containing keywords the user has muted.

When it triggers:

• Post contains any of user’s muted words/phrases

How to avoid:

• Avoid commonly muted spam keywords
• Stay away from controversial trigger words
• Don’t use engagement bait phrases

Common muted keywords:

Promotional:
- "DM me"
- "Link in bio"
- "Follow for follow"
- "Giveaway"

Crypto/Scam:
- "100x"
- "Not financial advice"
- "Easy money"

Engagement Bait:
- "Like if you agree"
- "Retweet to win"

Political (varies by user):
- Various political terms

Source: muted_keyword_filter.rs

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Filter 10: Author Socialgraph Filter ⚠️ CRITICAL

What it does: Removes posts from authors the user has blocked or muted.

When it triggers:

• Viewer has blocked you
• Viewer has muted you

How to avoid:

• Don’t spam or annoy users
• Stay on-topic
• Engage authentically
• Don’t mass-tag or mass-reply

Source: author_socialgraph_filter.rs

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Filter 11: VF Filter (Visibility Filtering) ⚠️ CRITICAL

What it does: Removes posts flagged for safety issues.

Categories filtered:

• Spam
• Violence
• Gore
• Deleted posts
• ToS violations

When it triggers:

• Content violates X policies
• Automated spam detection
• User reports

How to avoid:

• Stay within Terms of Service
• Don’t post harmful content
• Avoid spam patterns
• Don’t try to game the system

Source: vf_filter.rs

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Filter 12: Dedup Conversation Filter

What it does: Keeps only highest-scored post per conversation thread.

When it triggers:

• Multiple posts from same conversation thread
• Multiple branches of same discussion

How to avoid: N/A (expected behavior)

Source: dedup_conversation_filter.rs

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Filter Priority

Filters that YOU can control:

Priority	Filter	Control Level
🔴 High	Author Socialgraph (block/mute)	Avoid being blocked
🔴 High	VF Filter (safety)	Stay within ToS
🟡 Medium	Muted Keyword	Avoid spam words
🟢 Low	Age Filter	Post at peak times

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Pre-Scoring vs Post-Scoring Filters

Pre-Scoring (Before ML Model)

1. Drop Duplicates
2. Core Data Hydration
3. Age
4. Self Tweet
5. Retweet Deduplication
6. Ineligible Subscription
7. Previously Seen
8. Previously Served
9. Muted Keyword
10. Author Socialgraph

Post-Scoring (After Selection)

11. VF Filter (visibility/safety)
12. Dedup Conversation

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Filter Avoidance Checklist

□ Not using spam keywords
□ Not engaging in ways that trigger blocks
□ Compliant with X Terms of Service
□ Not posting duplicate content
□ Posting at active times (avoid age filter)
□ Authentic engagement (avoid spam detection)

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