feat(quality): GOAT synthesis improvements - hybrid cross-source linking, YouTube synonyms, human-readable xref tags

Ran 15-way blinded comparison (5 topics x 3 versions). CROSS won all 5 topics
(4.74/5.0 avg vs HN 4.10, Base 3.73). Then improved CROSS further:

- dedupe.py: hybrid similarity (token+trigram Jaccard) at 0.40 threshold,
  cross-source links went from 3 to 13 items across 5 topics
- render.py: [xref: HN5, HN4] -> [also on: HN, Reddit] for human-readable tags
- youtube_yt.py: SYNONYMS dict so "hip hop" matches "rap" (0.33 -> 0.71 score)
- SKILL.md: instruction #7 tells Claude to lead with cross-platform signals

Validation: improved CROSS scores 4.38/5.0 vs original 3.98 (+0.40), wins 4/5
topics. Biggest gains in specificity (+0.8) and format compliance (+1.0).

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

docs/comparison-results/synthesis/base-1-claude-code.md

@@ -0,0 +1,35 @@
+What I learned:
+
+The Claude Code skills ecosystem is in a rapid expansion phase, with community-built skill libraries and frameworks emerging as the dominant trend across Reddit and X this month. @ihtesham2005 flagged that Anthropic open-sourced their internal Skills library, and r/ClaudeCode is seeing a wave of builders shipping reusable skill packs.
+
+**Skills adoption is accelerating at the team level** - One team reported 3x-ing their Claude Code skill usage in two weeks by syncing skills, hooks, and MCP configs across their org, per r/ClaudeCode. The key was making skills discoverable and easy to install rather than relying on individual setup.
+
+**One-command frameworks are consolidating the ecosystem** - ClaudeInOne bundles 135 agents, 35 curated skills, 121 plugins, and 6 MCP configs into a single install, per @arpan7sarkar. This "batteries included" approach is gaining traction as the skill count grows faster than people can evaluate individually.
+
+**Self-improvement loops are the power-user pattern** - A "wrap-up" skill that captures session learnings and feeds them back into future sessions was highlighted as a favorite Claude Code skill on r/ClaudeCode. The idea of skills that improve themselves over time resonated heavily.
+
+**Non-developers are building with skills** - Grace Leung's YouTube tutorial on building an AI marketing team with skills in 16 minutes pulled 47K views in 4 days. The framing has shifted from "developer tool" to "anyone who can describe a workflow."
+
+**MCP servers remain the infrastructure layer** - Robin Ebers' "8 MCP Servers That Make Claude Code 10x Better" (90K views) argues most MCP servers are "overhyped garbage" but a handful are genuine game changers. The consensus is that skills handle workflow logic while MCP servers handle tool integrations.
+
+KEY PATTERNS from the research:
+1. Skills are moving from individual to team-shared - syncing across orgs is the unlock, per r/ClaudeCode
+2. Skill marketplaces and directories are emerging as discovery mechanisms, per @ghumare64
+3. Marketing and SEO are the fastest-growing non-dev skill categories, per r/ClaudeCode
+4. Skills vs MCP confusion persists - Postman and Solo Swift Crafter both made explainer videos clarifying the distinction
+5. Builder skills that generate other skills are the meta-pattern, per @matgoldsborough
+
+---
+All agents reported back!
+├─ 🟠 Reddit: 4 threads │ 291 upvotes │ 0 comments
+├─ 🔵 X: 11 posts │ 22 likes │ 1 reposts
+├─ 🔴 YouTube: 10 videos │ 461,224 views │ 3 with transcripts
+├─ 🟡 HN: 0 stories (no results this cycle)
+├─ 🌐 Web: supplementary
+└─ 🗣️ Top voices: @ihtesham2005 (6 likes), @zeeg (4 likes, 1 RT) │ r/ClaudeCode
+---
+
+I'm now an expert on Claude Code skills and MCP servers. Some things I can help with:
+- Compare the ClaudeInOne framework vs building your own skill library from scratch
+- Walk through setting up a self-improvement loop skill for your workflow
+- Help you decide which MCP servers are actually worth installing based on Robin Ebers' teardown