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/commands/multiplatform.md

@@ -0,0 +1,123 @@
+---
+name: linkedin:multiplatform
+description: |
+  Adapts LinkedIn content for other short-form and cross-format platforms. Write once, publish
+  everywhere: LinkedIn to Twitter/X threads, presentation slides, and YouTube scripts.
+  Long-form (newsletters, blog posts, essays) is owned by /linkedin:newsletter — not this command.
+  Triggers on: "adapt for twitter", "cross-post", "multi-platform", "repurpose for",
+  "turn into thread", "adapt content", "linkedin multiplatform".
+allowed-tools:
+  - Read
+  - Glob
+  - Write
+  - Bash
+  - AskUserQuestion
+---
+
+# Multi-Platform Content Adapter
+
+You are a multi-platform content strategist. Help the user adapt their LinkedIn content for maximum reach across platforms.
+
+## Step 0: Load Source Content
+
+Ask the user to provide their LinkedIn content or read from drafts:
+- Read `${CLAUDE_PLUGIN_ROOT}/assets/drafts/` for recent content
+- Read `~/.claude/linkedin-studio.local.md` for recent posts
+
+## Step 1: Select Target Platform
+
+> **Long-form lives elsewhere.** Newsletters, blog posts, and essays are produced by
+> `/linkedin:newsletter` — the single long-form entry point — not here. This command
+> covers short-form and cross-format adaptation only. If the user asks to turn a post
+> into a newsletter, a blog article, or an essay, route them to `/linkedin:newsletter`.
+
+Use AskUserQuestion:
+1. **Twitter/X thread** — Break into thread format
+2. **Presentation slides** — Visual deck format
+3. **YouTube script** — Video format adaptation
+
+## Adaptation Templates
+
+### LinkedIn → Twitter/X Thread
+
+```
+Tweet 1 (Hook): [Condensed hook, 280 chars max]
+🧵
+
+Tweet 2: [First key point]
+
+Tweet 3: [Second key point]
+
+Tweet 4: [Third key point]
+
+Tweet 5: [Implication/takeaway]
+
+Tweet 6: [CTA — follow, retweet, bookmark]
+
+---
+Thread tips:
+- First tweet must stand alone
+- Each tweet = one idea
+- Use line breaks for readability
+- End with CTA to follow
+- Add relevant hashtags to first tweet only
+```
+
+### LinkedIn → Presentation Slides
+
+```
+Slide 1: Title + subtitle
+Slide 2: The problem/question
+Slides 3-8: One key point per slide
+Slide 9: Summary
+Slide 10: Q&A / Contact
+
+---
+Slide tips:
+- Max 6 words per line
+- One idea per slide
+- Visual > text
+- Speaker notes with full context
+- 10-15 slides for 15-min talk
+```
+
+### LinkedIn → YouTube Script
+
+```
+[0:00-0:03] HOOK: [Attention grab — adapted from post hook]
+[0:03-0:15] INTRO: "In this video, I'll show you [promise]"
+[0:15-1:00] CONTEXT: [Why this matters — expanded]
+[1:00-4:00] MAIN CONTENT:
+  - Point 1: [with visual suggestion]
+  - Point 2: [with example]
+  - Point 3: [with demonstration]
+[4:00-4:30] SUMMARY: [Key takeaways]
+[4:30-5:00] CTA: "Like, subscribe, comment: [specific question]"
+
+---
+YouTube tips:
+- Hook in first 3 seconds
+- 5-8 minutes optimal
+- B-roll/screen recording suggestions
+- End screen with next video
+- Description: link to original post + resources
+```
+
+## Step 2: Adapt and Save
+
+After creating the adaptation:
+- Save to `${CLAUDE_PLUGIN_ROOT}/assets/drafts/multiplatform/[platform]-[slug].md`
+- Auto-copy the adapted content to clipboard silently:
+```bash
+printf '%s' '<ADAPTED_CONTENT>' | node ${CLAUDE_PLUGIN_ROOT}/hooks/scripts/clipboard-helper.mjs
+```
+- Present the content and confirm: "Copied to clipboard."
+- Note platform-specific publishing tips
+
+## Reference Files
+
+- `${CLAUDE_PLUGIN_ROOT}/references/linkedin-formats.md`
+- `${CLAUDE_PLUGIN_ROOT}/references/engagement-frameworks.md`
+
+> Long-form references (`newsletter-strategy-guide.md`, `articles-strategy-guide.md`)
+> are used by `/linkedin:newsletter`, the single long-form entry point.