fix(linkedin-studio): S28 ref-consistency B — format magnitudes → SSOT
Reconcile commands/video.md + references/linkedin-formats.md to the algorithm-signals SSOT in one pass (20 edits/2 files). The unsourced "30% completion rate or zero distribution" gate (7x) → "completion/dwell is a ranking input; shorter completes better; no published hard completion gate". The 6 S27-folded link-penalty lines → "correlate with lower reach" (incl. heading "The External Link Penalty" → "External Links and Lower Reach"). Six other unsourced format magnitudes softened to direction-without-number (video 5.60% ER, Live 12-24x, polls 1.64x, 3x shares, Creator-Mode 35%). One internal contradiction fixed (3-sec = 70% retention contradicted the already-reconciled three-second-folklore note). Bucket D (this file's non-format coefficients: 47-50% reach-decline, AI-comment -30%/-55%, hashtag -68%) left intact and deferred to S30, which is re-scoped to cover them + the other files. Gate 81/0/0; counts 29/19 unchanged. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016qgzo6rxthw7KuxHjn5vyE
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@ -49,14 +49,14 @@ Choosing the right format isn't just about engagement rates—it's about underst
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**2. Native documents (PDFs): High engagement (historically 24.42%, likely inflated)**
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- Note: documents/carousels are the top organic format (~7%; see `references/algorithm-signals-reference.md`). Cross-study rates (7% / 21.8% / 49.5%) differ by denominator/methodology, not by which format wins — do not treat any single figure as the carousel rate.
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- Great for frameworks, step-by-step content, detailed insights
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- Keeps users on platform (no external link penalty)
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- Keeps users on platform (no external link, which would correlate with lower reach)
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- Downloadable = high perceived value
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- Best for: Comprehensive guides, templates, detailed analyses
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**3. Video posts: 5.60% engagement rate**
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**3. Video posts: engagement varies (no reliable single rate)**
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- Optimal length: 60 seconds (2026 sweet spot, down from 90s)
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- **Critical:** 30% minimum completion rate or video gets zero distribution
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- LinkedIn Live: 12-24x engagement vs standard posts
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- **Completion matters:** shorter videos complete better; completion/dwell is a ranking input (see `references/algorithm-signals-reference.md`) — no hard "completion or zero distribution" gate
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- LinkedIn Live: strong engagement vs standard posts (multiplier unverified)
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- 85% watch without sound (captions essential)
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- **4:5 (1080×1350) or 1:1 (1080×1080) preferred** for broad feed distribution on a desktop-heavy professional audience. 9:16 is delivered mobile-only and crops to 1:1 on desktop; its "distribution boost" is an uncorroborated heuristic — no official 4:5-vs-9:16 engagement study exists. Reserve 9:16 for the opt-in vertical video tab
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- Front-load value for muted autoplay — ~85% watch without sound. The "three-second hook" is cross-platform folklore, not a LinkedIn-named signal; LinkedIn's only official "3 seconds" is the minimum video length
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@ -78,7 +78,7 @@ Choosing the right format isn't just about engagement rates—it's about underst
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- Very short (150-300 chars) can perform well with concentrated insights
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- Best for: Thought leadership, contrarian takes, personal stories
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**6. Polls: 1.64x reach multiplier (declining due to overuse)**
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**6. Polls: declining effectiveness; audience research only (no reliable reach multiplier — see `references/algorithm-signals-reference.md`)**
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- Still generates high impressions but effectiveness declining
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- Strategic use for industry trends, controversial opinions
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- Use caption (300-400 chars) to provide context and insights
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@ -88,7 +88,7 @@ Choosing the right format isn't just about engagement rates—it's about underst
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**7. Link posts: AVOID or use strategically**
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- External links in the body correlate with lower reach (see `references/algorithm-signals-reference.md`)
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- 4.9% more impressions than no-link posts (OLD DATA - now penalized)
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- 4.9% more impressions than no-link posts (OLD DATA — body links now correlate with lower reach; see `references/algorithm-signals-reference.md`)
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- Platform wants to keep users on LinkedIn
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- If must link: Use native LinkedIn article or wait until second-tier comment
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- Best for: Rare occasions when external resource is essential
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@ -191,13 +191,13 @@ Algorithm prioritizes content that keeps users on platform longer.
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- Very short posts (quick reaction, quick scroll)
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- Polls (interaction but low time investment)
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### The External Link Penalty
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### External Links and Lower Reach
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**Critical reality:**
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- External links in the body correlate with lower reach (see `references/algorithm-signals-reference.md`)
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- Links in post body get penalized most heavily
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- Links in the post body correlate with the largest reach reduction
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- First comment links are tracked but acceptable as workaround when necessary
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- Old strategy of "drive traffic to website" is now algorithmically punished
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- Old strategy of "drive traffic to website" now correlates with lower reach (LinkedIn denies an intentional penalty; lead with value)
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**What to do instead:**
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- Use LinkedIn native formats (Articles, Documents, Newsletters)
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@ -270,7 +270,7 @@ Immediate engagement in first hour is critical for triggering subsequent waves.
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- Long gaps between posts (breaks consistency signal)
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**Thought leadership posts:**
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- Get 3x more shares than average content
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- Tend to earn more shares than average content
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- Generate deeper conversations (15+ word comments)
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- Position you as subject matter expert
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- Compound authority over time
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@ -288,7 +288,7 @@ Immediate engagement in first hour is critical for triggering subsequent waves.
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**The Data Reality:**
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- Video posts get high impression counts
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- BUT: Engagement rates are often lower than text posts
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- Videos under 60 seconds optimal for balancing engagement and completion rate (30% minimum completion gate)
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- Videos under 60 seconds optimal for balancing engagement and completion rate (higher completion = stronger dwell signal; no hard completion gate)
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- Algorithm prioritizes dwell time over impressions
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**What This Means:**
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@ -353,7 +353,7 @@ Video isn't the silver bullet many creators think it is. Text-based thought lead
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#### Hook (3-5 seconds) - CRITICAL
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**Your first 3 seconds determine 70% of retention.**
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**Your opening seconds carry the most weight — front-load value.** (The "three-second hook" is cross-platform folklore, not a LinkedIn-named signal; see the format notes above.)
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**Hook types:**
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- **Pattern interrupt:** "This will sound counterintuitive..."
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@ -429,7 +429,7 @@ Video isn't the silver bullet many creators think it is. Text-based thought lead
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**Avoid:**
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- "Like and share if you agree" (engagement bait)
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- External link CTAs (algorithm penalty)
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- External link CTAs (correlate with lower reach)
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- Asking for too many actions
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### Video Editing Guidelines
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@ -475,7 +475,7 @@ Video isn't the silver bullet many creators think it is. Text-based thought lead
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**5. Length Optimization**
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- Ideal: 60 seconds (2026 sweet spot — maximizes completion rate)
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- Acceptable: 30-90 seconds
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- Avoid: >90 seconds (completion rate drops, 30% minimum required for any distribution)
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- Avoid: >90 seconds (completion rate drops — completion/dwell is a ranking input; no hard minimum, but shorter completes better)
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**Editing tools by skill level:**
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@ -540,7 +540,7 @@ Video isn't the silver bullet many creators think it is. Text-based thought lead
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- If using 16:9: 1920x1080px minimum (letterboxed in the feed)
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- **File format:** MP4 (H.264) — the safe default. LinkedIn's own sources conflict on MOV/AVI (member troubleshooting lists them supported; the Pages spec says no longer supported), so treat MOV/AVI as warn-only, not blocking — re-encode to MP4 when in doubt
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- **Maximum file size:** 5GB
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- **Maximum length:** 10 minutes (but aim for 30-60 seconds. 30% completion rate minimum or zero distribution)
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- **Maximum length:** 10 minutes (but aim for 30-60 seconds — shorter lifts completion/dwell, a ranking input; no hard completion gate)
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- **Frame rate:** 30fps standard, 60fps for smooth motion
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**Lighting:**
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@ -591,7 +591,7 @@ Video isn't the silver bullet many creators think it is. Text-based thought lead
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### LinkedIn Live Considerations
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**The Live Advantage:**
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- 12-24x engagement vs. standard posts
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- Strong engagement vs. standard posts (multiplier unverified)
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- Algorithm massively prioritizes live content
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- Real-time interaction builds community
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- Saved as regular video post after
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@ -641,7 +641,7 @@ Before posting any video, verify:
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- [ ] Hook grabs attention in 3 seconds
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- [ ] Clear value delivered (lesson/insight)
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- [ ] Tight editing (no unnecessary seconds)
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- [ ] Length: 60 seconds optimal (30% completion rate minimum)
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- [ ] Length: 60 seconds optimal (shorter lifts completion/dwell — no hard completion gate)
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- [ ] Ends with engagement-focused CTA
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**Technical:**
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@ -659,7 +659,7 @@ Before posting any video, verify:
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- [ ] Complements overall content strategy
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- [ ] Doesn't include external links
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**Bottom Line on Video:** Use strategically when it genuinely adds value beyond text. Prioritize authenticity over production quality. Focus on 60-second videos that deliver concentrated insights. LinkedIn now requires 30% minimum completion rate for any distribution — shorter is safer. Always optimize for mobile-first consumption: captions on (the one enforceable spec), 4:5/1:1 aspect for broad distribution, and a front-loaded opening for muted autoplay.
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**Bottom Line on Video:** Use strategically when it genuinely adds value beyond text. Prioritize authenticity over production quality. Focus on 60-second videos that deliver concentrated insights. Completion/dwell is a ranking input — shorter videos complete better (no published hard completion gate). Always optimize for mobile-first consumption: captions on (the one enforceable spec), 4:5/1:1 aspect for broad distribution, and a front-loaded opening for muted autoplay.
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## Creator Mode Features (Available to All Users)
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@ -671,4 +671,4 @@ As of late 2024, Creator Mode features are available to all LinkedIn users witho
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- LinkedIn Live access
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- Creator analytics
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**Note:** Profiles actively using these features see up to 35% more reach compared to inactive profiles. The key is not "enabling" Creator Mode (no longer exists as a toggle) but actively using the features.
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**Note:** Profiles actively using these features tend to see more reach than inactive ones (exact figure unverified). The key is not "enabling" Creator Mode (no longer exists as a toggle) but actively using the features.
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