feat(ultraplan-local): v1.6.0 — /ultraresearch-local deep research command

Add /ultraresearch-local for structured research combining local codebase
analysis with external knowledge via parallel agent swarms. Produces research
briefs with triangulation, confidence ratings, and source quality assessment.

New command: /ultraresearch-local with modes --quick, --local, --external, --fg.
New agents: research-orchestrator (opus), docs-researcher, community-researcher,
security-researcher, contrarian-researcher, gemini-bridge (all sonnet).
New template: research-brief-template.md.

Integration: --research flag in /ultraplan-local accepts pre-built research
briefs (up to 3), enriches the interview and exploration phases. Planning
orchestrator cross-references brief findings during synthesis.

Design principle: Context Engineering — right information to right agent at
right time. Research briefs are structured artifacts in the pipeline:
ultraresearch → brief → ultraplan --research → plan → ultraexecute.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

plugins/linkedin-thought-leadership/commands/carousel.md

@@ -32,11 +32,11 @@ LinkedIn carousels get 6.6% average engagement — highest of all formats.
 
 Choose a template:
 
-1. How-To Guide — Teach a process step-by-step (8-10 slides)
-2. Listicle / Top N — Curated list of tips, tools, or lessons (8-12 slides)
-3. Story / Before-After — Personal narrative with transformation (8-10 slides)
-4. Comparison / vs. — Side-by-side analysis of two approaches (8-10 slides)
-5. Framework / Mental Model — Present an original framework (8-10 slides)
+1. How-To Guide — Teach a process step-by-step (6-8 slides)
+2. Listicle / Top N — Curated list of tips, tools, or lessons (6-8 slides)
+3. Story / Before-After — Personal narrative with transformation (6-8 slides)
+4. Comparison / vs. — Side-by-side analysis of two approaches (6-8 slides)
+5. Framework / Mental Model — Present an original framework (6-8 slides)
 ```
 
 Use AskUserQuestion for selection.
@@ -105,7 +105,7 @@ Run against the Carousel Quality Checklist from `carousel-templates.md`:
 - [ ] Cover slide has a clear promise or question
 - [ ] Each slide has one point (not multiple ideas)
 - [ ] Text is readable on mobile (keep lines short)
-- [ ] 8-10 slides total
+- [ ] 5-8 slides total (7 is optimal)
 - [ ] Last slide has a clear CTA
 - [ ] Caption hooks attention and prompts swipe
 - [ ] Consistent structure across all slides

plugins/linkedin-thought-leadership/commands/report.md

@@ -228,7 +228,7 @@ Your post on [topic] achieved 12,500 impressions — a personal best!
 → **Reference:** First-hour velocity of 15+ engagements unlocks broader distribution.
 
 🟡 **Warning: Format stagnation detected**
-80%+ of your recent posts are text-only. PDF/Carousels get 1.6x reach multiplier.
+80%+ of your recent posts are text-only. PDF/Carousels get 3.4x reach multiplier.
 → **Action:** Try a carousel or multi-image post this week for format diversification.
 ```
 

plugins/linkedin-thought-leadership/commands/video.md

@@ -59,10 +59,10 @@ Use AskUserQuestion:
 **How long should this video be?**
 1. **30 seconds** (75 words) — Single punchy insight or quick tip
 2. **60 seconds** (150 words) — Framework intro or single lesson
-3. **90 seconds** (225 words) — Complete framework or story with lesson (Recommended)
-4. **2 minutes** (300 words) — Detailed story or multi-step process
+3. **90 seconds** (225 words) — Extended format for complex frameworks (use sparingly)
+4. **2 minutes** (300 words) — Detailed story or multi-step process (retention drops significantly)
 
-Default recommendation: **90 seconds** is the sweet spot for LinkedIn — deep enough to deliver value, short enough for high completion rates.
+Default recommendation: **60 seconds** is the 2026 sweet spot — LinkedIn requires 30% minimum completion rate or your video gets zero distribution. Shorter videos achieve higher completion rates and the algorithm rewards that heavily.
 
 ## Step 3: Topic and Angle Selection
 
@@ -188,7 +188,7 @@ Before you record:
 - [ ] Read the script aloud once (practice run)
 - [ ] Set up lighting (natural light facing window, or ring light)
 - [ ] Check audio (lavalier mic or quiet room)
-- [ ] Vertical format: 4:5 (1080×1350) for LinkedIn
+- [ ] Vertical format: 9:16 (1080×1920) for LinkedIn vertical feed (3-4x watch duration vs landscape)
 - [ ] Clean background
 - [ ] Have captions tool ready (CapCut, Descript, or Kapwing)
 - [ ] First comment ready to paste immediately after posting