feat: workflow recipes, eval badges, one-click MCP, playground upgrades, sample gallery, skill-of-the-week

Signature features that turn breadth (174 skills) into a differentiated product:

- Workflow recipes: 5 cross-profession chains (workflows.json) that pass each
  output forward — slash commands (/ship-a-feature etc.), WORKFLOWS.md generated
  by scripts/build-workflows.mjs, README + MCP (list_workflows/get_workflow) wired
- Eval-backed quality: real per-skill scores from evals/results.json surfaced as
  badges in the playground and an honest README section (6 scored skills)
- One-click MCP: 'claude mcp add' install + workflow tools, works in any MCP client
- Playground: 'which skill?' recommender, with/without compare toggle, shareable
  ?skill= deep-links with prefilled inputs
- Sample-output gallery: hand-written examples for the hero five + generator
  (scripts/build-samples.mjs) + web/examples.html
- Skill-of-the-week: scheduled workflow + script that composes X/LinkedIn posts
  and posts to an optional webhook

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

commands/README.md

@@ -11,6 +11,18 @@ Claude Code **slash commands** that run a skill on whatever you pass them.
 | `/retro` | Structured sprint retrospective | retro-analysis |
 | `/exec-summary` | Crisp executive summary | executive-summary |
 
+## 🧩 Workflow recipes — chained commands
+
+These run **several skills in sequence**, passing each output forward as context. Full detail in [WORKFLOWS.md](../WORKFLOWS.md).
+
+| Command | Chains | Lifecycle |
+|---|---|---|
+| `/ship-a-feature` | ambiguity-resolver → prd-template → rice-prioritisation → roadmap-narrative → go-to-market | Discover → Ship |
+| `/close-the-quarter` | metrics-framework → churn-analysis → executive-update → board-deck-narrative | Measure → Communicate |
+| `/launch-a-product` | competitor-teardown → product-positioning-doc → go-to-market → product-launch-checklist → press-release | Decide → Ship |
+| `/rescue-an-account` | cs-health-scorecard → churn-analysis → cs-escalation-brief → renewal-playbook | Measure → Communicate |
+| `/run-discovery` | ambiguity-resolver → discovery-interview-guide → user-research-synthesis → rice-prioritisation | Discover → Decide |
+
 ## Install
 
 ```bash