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>

references/glossary.md

@@ -1,4 +1,4 @@
-# LinkedIn Thought Leadership Glossary
+# LinkedIn Studio Glossary
 
 Alphabetical glossary of specialized terminology used across the plugin. Each term includes a definition and cross-references to where it's used.
 
@@ -9,12 +9,12 @@ Alphabetical glossary of specialized terminology used across the plugin. Each te
 ### 360Brew
 LinkedIn's 150-parameter foundation model that validates creator profiles before distributing content. Checks expertise alignment across About section, Experience, content history, network quality, and engagement patterns. Content from unvalidated profiles receives limited distribution.
 
-**Used in:** `references/algorithm-signals-reference.md`, `skills/linkedin-thought-leadership/SKILL.md`, `agents/content-optimizer.md`
+**Used in:** `references/algorithm-signals-reference.md`, `skills/linkedin-studio/SKILL.md`, `agents/content-optimizer.md`
 
 ### 5x5x5 Pre-Posting Method
 Engagement priming technique performed 15-20 minutes before posting: identify 5 people with overlapping audiences, find their recent posts (last 24h), write 5 thoughtful comments (15+ words each). Primes algorithm visibility and warms engagement signals.
 
-**Used in:** `skills/linkedin-thought-leadership/SKILL.md`, `agents/engagement-coach.md`, `agents/network-builder.md`
+**Used in:** `skills/linkedin-studio/SKILL.md`, `agents/engagement-coach.md`, `agents/network-builder.md`
 
 ---
 
@@ -62,17 +62,17 @@ Seven-stage journey of repurposed content: Original Creation → First Repurposi
 ### Content Mix (70/20/10)
 Optimal content type distribution: 70% Educational (teach, frameworks, how-to), 20% Inspirational (stories, lessons, failures), 10% Entertaining (hot takes, humor, observations). Enforced by content-planner agent.
 
-**Used in:** `skills/linkedin-thought-leadership/SKILL.md`, `agents/content-planner.md`, `references/linkedin-growth-playbook-2025-2026.md`
+**Used in:** `skills/linkedin-studio/SKILL.md`, `agents/content-planner.md`, `references/linkedin-growth-playbook-2025-2026.md`
 
 ### Content Pillars
 3-5 core expertise areas that define your LinkedIn focus. Used for topic consistency validation, gap analysis in content planning, and 360Brew alignment checks. Example for AI content: News, Implementation, Strategy, Tools.
 
-**Used in:** `agents/content-planner.md`, `references/ai-content-framework.md`, `skills/linkedin-thought-leadership/SKILL.md`
+**Used in:** `agents/content-planner.md`, `references/ai-content-framework.md`, `skills/linkedin-studio/SKILL.md`
 
 ### CTA (Call-to-Action)
 Specific, genuine engagement prompt at the end of a post. Must feel natural and offer optionality ("Which strategy has worked for your team?" > "What do you think?"). Creates invitation for the engagement that drives distribution.
 
-**Used in:** `references/engagement-frameworks.md`, `skills/linkedin-thought-leadership/SKILL.md`, `agents/content-optimizer.md`
+**Used in:** `references/engagement-frameworks.md`, `skills/linkedin-studio/SKILL.md`, `agents/content-optimizer.md`
 
 ---
 
@@ -124,7 +124,7 @@ LinkedIn's mechanism for validating creator authority: professional history, pos
 ### First-Hour Engagement
 Critical window (0-60 minutes post-publication) determining ~70% of a post's total reach. Requires: 5x5x5 pre-posting engagement, immediate response to first comments (within 5 minutes), and continued engagement through 90 minutes.
 
-**Used in:** `skills/linkedin-thought-leadership/SKILL.md`, `references/linkedin-formats.md`, `agents/engagement-coach.md`
+**Used in:** `skills/linkedin-studio/SKILL.md`, `references/linkedin-formats.md`, `agents/engagement-coach.md`
 
 ### Four-Stage Distribution Model
 Sequential post distribution: Stage 1 (0-30s: Quality classifier + 360Brew validation) → Stage 2 (0-90min: Test to 6-10% of connections) → Stage 3 (1-24h: Extended if velocity good) → Stage 4 (24-72h+: Evergreen circulation).
@@ -147,7 +147,7 @@ The critical 60-90 minute window post-publication where LinkedIn tests content w
 ### Hook
 Opening 110-140 characters of a post that must work standalone on mobile (before "see more" cutoff) and create a curiosity gap. 10 high-performing types: Surprising Stat, Bold Statement, Provocative Question, Contrarian, Personal Confession, Pattern Observation, Time Frame Urgency, Lesson Learned, Scenario, Direct Address.
 
-**Used in:** `references/engagement-frameworks.md`, `skills/linkedin-thought-leadership/SKILL.md`, `agents/content-optimizer.md`
+**Used in:** `references/engagement-frameworks.md`, `skills/linkedin-studio/SKILL.md`, `agents/content-optimizer.md`
 
 ### Hook Psychology
 Neuroscience-backed engagement: Pattern interrupts trigger prediction error → dopamine release → information gap demanding cognitive closure. Pattern interrupts are 2.7x more common in viral posts. Optimal first line: ~49 characters.