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/skills/skill-builder/.claude-flow/metrics/agent-metrics.json

@@ -0,0 +1 @@
+{}

.claude/skills/skill-builder/.claude-flow/metrics/performance.json

@@ -0,0 +1,87 @@
+{
+  "startTime": 1760892801445,
+  "sessionId": "session-1760892801445",
+  "lastActivity": 1760892801445,
+  "sessionDuration": 0,
+  "totalTasks": 1,
+  "successfulTasks": 1,
+  "failedTasks": 0,
+  "totalAgents": 0,
+  "activeAgents": 0,
+  "neuralEvents": 0,
+  "memoryMode": {
+    "reasoningbankOperations": 0,
+    "basicOperations": 0,
+    "autoModeSelections": 0,
+    "modeOverrides": 0,
+    "currentMode": "auto"
+  },
+  "operations": {
+    "store": {
+      "count": 0,
+      "totalDuration": 0,
+      "errors": 0
+    },
+    "retrieve": {
+      "count": 0,
+      "totalDuration": 0,
+      "errors": 0
+    },
+    "query": {
+      "count": 0,
+      "totalDuration": 0,
+      "errors": 0
+    },
+    "list": {
+      "count": 0,
+      "totalDuration": 0,
+      "errors": 0
+    },
+    "delete": {
+      "count": 0,
+      "totalDuration": 0,
+      "errors": 0
+    },
+    "search": {
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+      "totalDuration": 0,
+      "errors": 0
+    },
+    "init": {
+      "count": 0,
+      "totalDuration": 0,
+      "errors": 0
+    }
+  },
+  "performance": {
+    "avgOperationDuration": 0,
+    "minOperationDuration": null,
+    "maxOperationDuration": null,
+    "slowOperations": 0,
+    "fastOperations": 0,
+    "totalOperationTime": 0
+  },
+  "storage": {
+    "totalEntries": 0,
+    "reasoningbankEntries": 0,
+    "basicEntries": 0,
+    "databaseSize": 0,
+    "lastBackup": null,
+    "growthRate": 0
+  },
+  "errors": {
+    "total": 0,
+    "byType": {},
+    "byOperation": {},
+    "recent": []
+  },
+  "reasoningbank": {
+    "semanticSearches": 0,
+    "sqlFallbacks": 0,
+    "embeddingGenerated": 0,
+    "consolidations": 0,
+    "avgQueryTime": 0,
+    "cacheHits": 0,
+    "cacheMisses": 0
+  }
+}

.claude/skills/skill-builder/.claude-flow/metrics/task-metrics.json

@@ -0,0 +1,10 @@
+[
+  {
+    "id": "cmd-hooks-1760892801573",
+    "type": "hooks",
+    "success": true,
+    "duration": 77.53740999999997,
+    "timestamp": 1760892801651,
+    "metadata": {}
+  }
+]