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/optimization/parallel-execution.md

@@ -0,0 +1,59 @@
+# Parallel Task Execution
+
+## Purpose
+
+Execute independent subtasks in parallel for maximum efficiency.
+
+## Coordination Strategy
+
+### 1. Task Decomposition
+
+```
+Tool: mcp__claude-flow__task_orchestrate
+Parameters: {
+  "task": "Build complete REST API with auth, CRUD operations, and tests",
+  "strategy": "parallel",
+  "maxAgents": 8
+}
+```
+
+### 2. Parallel Workflows
+
+The system automatically:
+
+- Identifies independent components
+- Assigns specialized agents
+- Executes in parallel where possible
+- Synchronizes at dependency points
+
+### 3. Example Breakdown
+
+For the REST API task:
+
+- **Agent 1 (Architect)**: Design API structure
+- **Agent 2-3 (Coders)**: Implement auth & CRUD in parallel
+- **Agent 4 (Tester)**: Write tests as features complete
+- **Agent 5 (Documenter)**: Update docs continuously
+
+## CLI Usage
+
+```bash
+# Execute parallel tasks via CLI
+npx claude-flow parallel "Build REST API" --max-agents 8
+```
+
+## Performance Gains
+
+- 🚀 2.8-4.4x faster execution
+- 💪 Optimal CPU utilization
+- 🔄 Automatic load balancing
+- 📈 Linear scalability with agents
+
+## Monitoring
+
+```
+Tool: mcp__claude-flow__swarm_monitor
+Parameters: {"interval": 1000, "swarmId": "current"}
+```
+
+Watch real-time parallel execution progress!