feat: refactor 30+ skills to Anthropic progressive disclosure pattern

- All SKILL.md files now <500 lines (avg reduction 69%)
- Detailed content extracted to references/ subdirectories
- Frontmatter standardised: only name + description (Anthropic standard)
- New skills: brand-guidelines, spec-coauthor, report-templates, skill-creator
- Design skills: anti-slop guidelines, premium-proposals reference
- Removed non-standard frontmatter fields (triggers, version, author, category)

Plugins affected: infraestrutura, marketing, dev-tools, crm-ops, gestao,
core-tools, negocio, perfex-dev, wordpress, design-media

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

core-tools/skills/metrics/references/sql-queries.md

@@ -0,0 +1,77 @@
+# Metrics - Queries SQL (Fallback)
+
+Queries para usar quando tools MCP nao estao disponiveis.
+
+## Top 10 Skills
+
+```sql
+SELECT
+  name,
+  COUNT(*) as uses,
+  AVG(duration_ms)/60000 as avg_min,
+  (SUM(CASE WHEN status='error' THEN 1 ELSE 0 END) / COUNT(*) * 100) as error_rate
+FROM tblskill_agent_metrics
+WHERE created_at > DATE_SUB(NOW(), INTERVAL 30 DAY)
+  AND type = 'skill'
+GROUP BY name
+ORDER BY uses DESC
+LIMIT 10;
+```
+
+## ROI por Projecto
+
+```sql
+WITH skill_savings AS (
+  SELECT
+    m.project_id,
+    m.name,
+    COUNT(*) as uses,
+    (b.baseline_duration_ms - AVG(m.duration_ms))/60000 as saved_per_use_min
+  FROM tblskill_agent_metrics m
+  JOIN tblskill_agent_baselines b ON b.name = m.name
+  WHERE m.status = 'success'
+  GROUP BY m.project_id, m.name
+)
+SELECT
+  p.name as project,
+  c.company as client,
+  s.name as skill,
+  s.uses,
+  ROUND(s.uses * s.saved_per_use_min/60, 1) as hours_saved,
+  ROUND((s.uses * s.saved_per_use_min/60) * 50, 2) as value_eur
+FROM skill_savings s
+JOIN tblprojects p ON p.id = s.project_id
+JOIN tblclients c ON c.userid = p.clientid
+WHERE s.saved_per_use_min > 0
+ORDER BY hours_saved DESC;
+```
+
+## Trending Semanal
+
+```sql
+SELECT
+  name,
+  DATE_FORMAT(created_at, '%Y-W%u') as week,
+  COUNT(*) as executions,
+  AVG(duration_ms) as avg_ms
+FROM tblskill_agent_metrics
+WHERE created_at > DATE_SUB(NOW(), INTERVAL 30 DAY)
+GROUP BY name, week
+ORDER BY name, week DESC;
+```
+
+## Query Basica via MCP
+
+```sql
+SELECT
+  name,
+  type,
+  COUNT(*) as executions,
+  AVG(duration_ms) as avg_ms,
+  (SUM(CASE WHEN status='error' THEN 1 ELSE 0 END) / COUNT(*) * 100) as error_rate
+FROM tblskill_agent_metrics
+WHERE created_at > DATE_SUB(NOW(), INTERVAL 30 DAY)
+GROUP BY name, type
+ORDER BY executions DESC
+LIMIT 10;
+```