chore: restore .claude commands, agents, helpers & skills (lost in 1df208d)

Restores the entire .claude/ infrastructure that was accidentally deleted
in commit 1df208d ('feat(timeline): add pulse animation for in-flight drag
mutations'). Recovered via git checkout 1df208d^.

Restored:
- .claude/commands/ (gitlooper, sparc/, github/, automation/, monitoring/,
  optimization/, hooks/, plan, implement, research, review, perf, visualaudit)
- .claude/agents/ (core/, github/, sparc/, v3/, swarm/, templates/, ...)
- .claude/helpers/ (41 scripts incl. hook-handler.cjs, statusline.cjs)
- .claude/skills/ (20 skills incl. sparc-methodology, github-*, v3-*)
- .claude/settings.json (hooks configuration)

Also updated all CapaKraken → Nexus references in affected command files.

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

.claude/commands/analysis/token-efficiency.md

@@ -0,0 +1,50 @@
+# Token Usage Optimization
+
+## Purpose
+
+Reduce token consumption while maintaining quality through intelligent coordination.
+
+## Optimization Strategies
+
+### 1. Smart Caching
+
+- Search results cached for 5 minutes
+- File content cached during session
+- Pattern recognition reduces redundant searches
+
+### 2. Efficient Coordination
+
+- Agents share context automatically
+- Avoid duplicate file reads
+- Batch related operations
+
+### 3. Measurement & Tracking
+
+```bash
+# Check token savings after session
+Tool: mcp__claude-flow__token_usage
+Parameters: {"operation": "session", "timeframe": "24h"}
+
+# Result shows:
+{
+  "metrics": {
+    "tokensSaved": 15420,
+    "operations": 45,
+    "efficiency": "343 tokens/operation"
+  }
+}
+```
+
+## Best Practices
+
+1. **Use Task tool** for complex searches
+2. **Enable caching** in pre-search hooks
+3. **Batch operations** when possible
+4. **Review session summaries** for insights
+
+## Token Reduction Results
+
+- 📉 32.3% average token reduction
+- 🎯 More focused operations
+- 🔄 Intelligent result reuse
+- 📊 Cumulative improvements