feat(skills): Add content-engine for social media campaigns

- Source: affaan-m/everything-claude-code (translated from Chinese)
- Platform guidelines: X, LinkedIn, TikTok, YouTube, Discord
- Content repurposing workflow
- Added Firefrost-specific brand voice and campaign types
- Updated SKILLS-INDEX.md

Chronicler #73

docs/skills/SKILLS-INDEX.md

@@ -169,6 +169,27 @@
 
 ---
 
+### content-engine
+**Location:** `docs/skills/content-engine/SKILL.md`  
+**Source:** skill.fish (affaan-m/everything-claude-code) — translated from Chinese  
+**Triggers:** Social media, content creation, X/Twitter, LinkedIn, TikTok, YouTube, campaigns, FOMO, marketing
+
+**Purpose:** Create platform-native content and multi-platform campaigns
+
+**What It Covers:**
+- Platform-specific guidelines (X, LinkedIn, TikTok, YouTube, Discord)
+- Content repurposing workflow (anchor → atomic ideas → variants)
+- Quality gates and deliverables checklist
+- Firefrost-specific brand voice and campaign types
+
+**Read This When:**
+- Creating social media posts for any platform
+- Building content campaigns (like FOMO series)
+- Repurposing content across platforms
+- Helping Meg with social media strategy
+
+---
+
 ### stripe-best-practices
 **Location:** `docs/skills/stripe-best-practices/SKILL.md`  
 **Source:** skill.fish (anthropics/claude-plugins-official)  
@@ -339,6 +360,8 @@ docs/skills/
 ├── chronicler-handoff/
 │   ├── SKILL.md
 │   └── references/
+├── content-engine/
+│   └── SKILL.md
 ├── firefrost-branding/
 │   └── SKILL.md
 ├── task-creation/

docs/skills/content-engine/SKILL.md

@@ -0,0 +1,163 @@
+---
+name: content-engine
+description: |
+  Create platform-native content for X, LinkedIn, TikTok, YouTube, newsletters, 
+  and cross-platform campaigns. Use when creating social media posts, threads, 
+  scripts, content calendars, or adapting one source asset across multiple platforms.
+source: skill.fish (affaan-m/everything-claude-code) — translated from Chinese
+---
+
+# Content Engine
+
+Transform one idea into powerful, platform-native content — not posting the same thing everywhere.
+
+---
+
+## WHEN TO ACTIVATE
+
+- Writing X posts or threads
+- Drafting LinkedIn posts or updates
+- Writing short-form video or YouTube scripts
+- Repurposing articles, podcasts, presentations, or docs into social content
+- Building lightweight content plans around launches, milestones, or themes
+- Creating FOMO campaign content for Firefrost
+
+---
+
+## FIRST QUESTIONS
+
+Clarify:
+
+- **Source material:** What content are we adapting from?
+- **Audience:** Builders, investors, customers, operators, or general audience?
+- **Platform:** X, LinkedIn, TikTok, YouTube, newsletter, or multi-platform?
+- **Goal:** Brand awareness, conversion, recruitment, authority building, launch support, or engagement?
+
+---
+
+## CORE RULES
+
+1. **Adapt for the platform.** Don't cross-post identical copy.
+2. **Opening hooks matter more than summaries.**
+3. **Each post carries one clear idea.**
+4. **Use specific details, not slogans.**
+5. **Keep CTAs small and clear.**
+
+---
+
+## PLATFORM GUIDELINES
+
+### X (Twitter)
+
+- Open fast
+- One idea per post or per tweet in a thread
+- Avoid links in main text unless necessary
+- Avoid hashtag overuse
+
+**Character limits:** 280 chars (standard), 4,000 chars (X Premium)
+
+### LinkedIn
+
+- First line must be strong (it's the preview)
+- Use short paragraphs
+- Frame around lessons learned, results, and takeaways
+- More professional/business tone
+
+**Character limits:** 3,000 chars per post
+
+### TikTok / Short-Form Video
+
+- First 3 seconds must grab attention
+- Script around visuals, not just voiceover
+- One demo, one claim, one CTA
+
+### YouTube
+
+- Show results early
+- Structure by chapters
+- Refresh visuals every 20-30 seconds
+
+### Newsletter
+
+- Provide one clear perspective, not a pile of unrelated content
+- Make section headers scannable
+- Make the opening paragraph work hard
+
+### Discord (Firefrost-specific)
+
+- Announcements: Clear, exciting, action-oriented
+- Community posts: Conversational, welcoming
+- Use embeds for important info
+- @mention roles sparingly but strategically
+
+---
+
+## CONTENT REPURPOSING FLOW
+
+Default cascade:
+
+1. **Anchor material:** Article, video, presentation, memo, or launch doc
+2. **Extract 3-7 atomic ideas**
+3. **Write platform-native variants**
+4. **Trim redundancy across outputs**
+5. **Align CTAs with platform intent**
+
+---
+
+## DELIVERABLES
+
+When asked for a campaign, return:
+
+- **Core angle** — The central message/hook
+- **Platform-specific drafts** — Adapted for each platform
+- **Optional posting sequence** — Suggested order/timing
+- **Optional CTA variants** — Different calls-to-action per platform
+- **Missing info needed** — What's required before publishing
+
+---
+
+## QUALITY GATES
+
+Check before delivery:
+
+- [ ] Each draft reads platform-native
+- [ ] Opening hooks are strong and specific
+- [ ] No generic hype language
+- [ ] No duplicate copy across platforms (unless requested)
+- [ ] CTAs match content and audience
+
+---
+
+## FIREFROST CONTEXT
+
+### Brand Voice
+- **Fire path:** Passionate, bold, community-driven
+- **Frost path:** Cool, strategic, builder-focused
+- **Combined:** Welcoming, authentic, gamer-friendly
+
+### Common Campaign Types
+- Server launches / modpack updates
+- Subscription tier promotions
+- Community events / milestones
+- Feature announcements
+- FOMO campaigns (9-post series format)
+
+### Platform Priority for Firefrost
+1. Discord (primary community hub)
+2. X/Twitter (announcements, engagement)
+3. YouTube (tutorials, showcases)
+4. TikTok (short clips, highlights)
+5. Reddit (r/feedthebeast, r/minecraft communities)
+
+### Hashtags (Use Sparingly)
+- #Minecraft
+- #ModdedMinecraft
+- #MinecraftServer
+- #FirefrostGaming
+
+---
+
+**Source:** skill.fish — affaan-m/everything-claude-code (translated from Chinese)  
+**Added:** 2026-04-09 by Chronicler #73
+
+**Fire + Frost + Foundation = Where Love Builds Legacy** 💙🔥❄️