Action Weights Reference

Complete reference for all 19 actions the algorithm predicts and weights.

---

Overview

The X algorithm predicts the probability of 19 different user actions and combines them with weights:

Final Score = Σ (weight_i × P(action_i))

---

Positive Actions

Actions that INCREASE your post’s score:

#	Action	Code Name	Description	Relative Weight
1	Like	favorite	User likes the post	⭐⭐ Medium
2	Reply	reply	User replies to post	⭐⭐⭐ High
3	Retweet	retweet	User retweets	⭐⭐ Medium
4	Quote Tweet	quote	User quote tweets	⭐⭐⭐ High
5	Share	share	User shares post	⭐ Low-Medium
6	Share via DM	share_via_dm	User shares via direct message	⭐ Low
7	Share via Link	share_via_copy_link	User copies link	⭐ Low
8	Click	click	User clicks on post	⭐ Low
9	Profile Click	profile_click	User clicks author’s profile	⭐⭐ Medium
10	Follow Author	follow_author	User follows after seeing post	⭐⭐⭐ High
11	Photo Expand	photo_expand	User expands photo	⭐ Low
12	Video View	video_quality_view	User watches video (quality)	⭐⭐ Medium
13	Dwell	dwell	User stops to read (binary)	⭐ Low
14	Dwell Time	dwell_time	Time spent reading (continuous)	⭐ Variable
15	Quoted Click	quoted_click	User clicks quoted content	⭐ Low

Notes on Positive Actions

• Reply and Quote Tweet have the highest weights (~2× others)
• Follow Author is high-intent signal (user wants more)
• Video Quality View only counts if video exceeds minimum duration
• Dwell Time is continuous (more time = more signal)

---

Negative Actions

Actions that DECREASE your post’s score:

#	Action	Code Name	Description	Relative Weight
16	Not Interested	not_interested	User clicks “Not interested”	❌ Negative
17	Mute Author	mute_author	User mutes you	❌❌ Strong Negative
18	Block Author	block_author	User blocks you	❌❌❌ Very Strong
19	Report	report	User reports post	❌❌❌❌ Devastating

Estimated Negative Weights

Based on code analysis:

Action	Estimated Impact
Not Interested	-1× a like
Mute	-5× a like
Block	-10× a like
Report	-20× a like

Key insight: One block undoes 10 likes. One report undoes 20 likes.

---

Weight Categories

Tier 1: Conversation Signals (Highest Value)

reply, quote, follow_author

These indicate deep engagement and intent.

Tier 2: Amplification Signals (High Value)

retweet, share, share_via_dm

User willing to put your content in front of others.

Tier 3: Interest Signals (Medium Value)

favorite, profile_click, video_quality_view

User is interested but passive.

Tier 4: Attention Signals (Low Value)

click, photo_expand, dwell, quoted_click

Basic attention metrics.

Tier -1: Negative Signals (Subtract)

not_interested, mute, block, report

Actively hurts your score.

---

Special Cases

Video Quality View (VQV)

// Only applies if video exceeds minimum duration
if video_duration_ms > MIN_VIDEO_DURATION_MS {
    apply(vqv_score, VQV_WEIGHT)
} else {
    // VQV weight = 0, not counted
}

Implication: Short video clips don’t get the VQV bonus.

Dwell Time (Continuous)

Unlike other binary actions, dwell time is continuous:

dwell_score: Binary (did user stop?)
dwell_time: Continuous (how long in seconds?)

Both are weighted and contribute to score.

---

Algorithm Source Files

Component	Source File
Weight application	home-mixer/scorers/weighted_scorer.rs
Score extraction	home-mixer/scorers/phoenix_scorer.rs
Action definitions	xai_recsys_proto::ActionName
Continuous actions	xai_recsys_proto::ContinuousActionName

---

Strategic Implications

Optimize For (Priority Order)

1. Replies - Ask questions, create debate
2. Quote Tweets - Create quotable insights
3. Follows - Provide unique ongoing value
4. Retweets - Make shareable content
5. Likes - Be generally engaging

Avoid At All Costs

1. Reports - Stay within ToS
2. Blocks - Don’t annoy or spam
3. Mutes - Don’t over-post or be off-brand
4. “Not Interested” - Stay relevant to audience

---

Quick Reference Card

MAXIMIZE:
├── Reply (⭐⭐⭐)
├── Quote (⭐⭐⭐)
├── Follow (⭐⭐⭐)
├── Retweet (⭐⭐)
├── Like (⭐⭐)
└── Video View (⭐⭐) [if > min duration]

MINIMIZE:
├── Report (❌❌❌❌ -20×)
├── Block (❌❌❌ -10×)
├── Mute (❌❌ -5×)
└── Not Interested (❌ -1×)

---

Next: Filter System →