refactor(linkedin)!: rename plugin linkedin-thought-leadership → linkedin-studio (v3.0.0)

BREAKING CHANGE: the marketplace slug, the agent namespace
(linkedin-studio:<agent>), and the runtime state-file path
(~/.claude/linkedin-studio.local.md) all change. Reinstall required;
existing state migrated in place (post metrics, streak, history preserved).
The /linkedin:* commands are unchanged — the command namespace is set
per-command in frontmatter and was always independent of the plugin slug.
Functionality is byte-identical to v2.4.0; this release is pure identity.

- dir + manifests: plugins/linkedin-studio + plugin.json + root marketplace.json
- agent namespace updated in commands/newsletter.md (only functional invoker)
- state path updated in 4 hook scripts + topic-rotation prompt + state template
- catch-all skill dir renamed skills/linkedin-studio (5 functional skills unchanged)
- docs + version bump to 3.0.0 across README badge, CHANGELOG, root README/CLAUDE.md
- historical records (CHANGELOG past entries, docs/ build artifacts,
  config-audit v5.0.0 snapshots) intentionally retain the old slug

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

plugins/linkedin-studio/assets/checklists/quality-scorecard.md

@@ -0,0 +1,135 @@
+# Post Quality Scorecard (Pre-Publish Check)
+
+Use this scorecard before publishing ANY post to predict performance.
+
+---
+
+## Scoring System
+
+Rate each criterion 0-3:
+- 0 = Missing/Poor
+- 1 = Basic
+- 2 = Good
+- 3 = Excellent
+
+---
+
+## Profile Alignment (Weight: 2x)
+
+| Criterion | Score | Notes |
+|-----------|-------|-------|
+| Topic matches your 5 core areas | /3 | Algorithm checks expertise |
+| Consistent with recent content | /3 | Topical authority signal |
+| Language/tone matches profile | /3 | Authenticity marker |
+| **Subtotal** | /9 x 2 = **/18** | |
+
+---
+
+## Hook Strength (Weight: 2x)
+
+| Criterion | Score | Notes |
+|-----------|-------|-------|
+| Works in 140 characters | /3 | Mobile threshold |
+| Creates curiosity gap | /3 | Click-through driver |
+| Promises clear value | /3 | Worth reading? |
+| **Subtotal** | /9 x 2 = **/18** | |
+
+---
+
+## Dwell Time Potential (Weight: 1.5x)
+
+| Criterion | Score | Notes |
+|-----------|-------|-------|
+| Length 1,200-1,800 characters | /3 | Optimal range |
+| White space formatting | /3 | Easy to read |
+| Encourages re-reading | /3 | Saves, bookmarks |
+| **Subtotal** | /9 x 1.5 = **/13.5** | |
+
+---
+
+## Engagement Triggers (Weight: 1.5x)
+
+| Criterion | Score | Notes |
+|-----------|-------|-------|
+| CTA invites 15+ word comments | /3 | High-value engagement |
+| Shareable (others want to amplify) | /3 | Viral potential |
+| Save-worthy (reference value) | /3 | Top algorithm signal |
+| **Subtotal** | /9 x 1.5 = **/13.5** | |
+
+---
+
+## Format Optimization (Weight: 1x)
+
+| Criterion | Score | Notes |
+|-----------|-------|-------|
+| Right format for content | /3 | Carousel/text/image |
+| Mobile-optimized | /3 | 70% mobile users |
+| No external links in body | /3 | Avoid penalty |
+| **Subtotal** | /9 x 1 = **/9** | |
+
+---
+
+## Voice Authenticity (Weight: 1x)
+
+| Criterion | Score | Notes |
+|-----------|-------|-------|
+| Sounds like the author (not generic AI) | /3 | Check against voice samples |
+| Uses natural contractions and phrasing | /3 | Conversational, not formal |
+| Includes specific personal detail or anecdote | /3 | Personal observation or reference |
+| **Subtotal** | /9 x 1 = **/9** | |
+
+---
+
+## Total Score: /81
+
+### Pass/Fail Thresholds
+
+| Score | Action |
+|-------|--------|
+| **57+** | Excellent - post with confidence |
+| **46-56** | Good - consider one improvement |
+| **34-45** | Review needed - improve weakest area |
+| **Under 34** | Don't post - rework significantly |
+
+---
+
+## 360Brew Validation (Critical)
+
+Before posting, verify your profile passes the 360Brew test:
+
+- [ ] Profile clearly shows expertise in post topic
+- [ ] Headline includes relevant keywords
+- [ ] Recent activity supports topical authority
+- [ ] Featured section demonstrates credibility
+
+**If profile doesn't support the post topic, fix profile FIRST.**
+
+---
+
+## Quick Score (30-Second Version)
+
+For quick posts, use this simplified check:
+
+1. On-topic for my expertise? (Y/N)
+2. Hook works in 140 chars? (Y/N)
+3. Clear value delivered? (Y/N)
+4. Ends with engagement prompt? (Y/N)
+5. No external links in body? (Y/N)
+
+**All 5 = Yes? -> Post it.**
+**Any No? -> Fix first.**
+
+---
+
+## Pre-Publish Basic Checklist
+
+Before finalizing any post, verify:
+
+- [ ] Hook works in first 110-140 characters
+- [ ] Character count within optimal range
+- [ ] Short paragraphs with white space
+- [ ] Tone is authentic, not corporate
+- [ ] Provides genuine value to readers
+- [ ] CTA is specific and natural
+- [ ] Passes the "mobile test" (readable on phone)
+- [ ] Passes thought leadership test: Does it help someone make a better decision or think differently?