n8n + Local Qwen2.5-Coder Git PR Diff Reviewer with Secret Redaction (n8n-local-pr-reviewer.json)

{
  "name": "Tinker AI — Local Git Diff Security & Bug Reviewer",
  "nodes": [
    {
      "parameters": {
        "httpMethod": "POST",
        "path": "git-pr-review",
        "responseMode": "lastNode"
      },
      "name": "PR Diff Webhook",
      "type": "n8n-nodes-base.webhook",
      "typeVersion": 2,
      "position": [200, 300]
    },
    {
      "parameters": {
        "jsCode": "const rawDiff = String($input.first().json.body?.diff || '').slice(0, 12000);\nconst sanitizedDiff = rawDiff.replace(/(sk-[a-zA-Z0-9]{20,}|ghp_[a-zA-Z0-9]{20,}|AKIA[0-9A-Z]{16})/g, '[REDACTED_SECRET]');\nreturn [{ json: { sanitizedDiff } }];"
      },
      "name": "Sanitize Secrets & Cap Diff Length",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [440, 300]
    },
    {
      "parameters": {
        "method": "POST",
        "url": "http://host.docker.internal:11434/api/generate",
        "sendBody": true,
        "specifyBody": "json",
        "jsonBody": "={{ JSON.stringify({ model: 'qwen2.5-coder:14b', format: 'json', stream: false, options: { temperature: 0.1, num_ctx: 16384 }, prompt: 'Review this git diff for security bugs, race conditions, or unhandled errors. Return JSON {summary, issues: [{severity, lineHint, suggestion}]}: \n' + $json.sanitizedDiff }) }}",
        "options": { "timeout": 60000 }
      },
      "name": "Qwen2.5-Coder Diff Review",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "retryOnFail": true,
      "maxTries": 2,
      "continueOnFail": true,
      "position": [680, 300]
    }
  ],
  "connections": {
    "PR Diff Webhook": {
      "main": [[{ "node": "Sanitize Secrets & Cap Diff Length", "type": "main", "index": 0 }]]
    },
    "Sanitize Secrets & Cap Diff Length": {
      "main": [[{ "node": "Qwen2.5-Coder Diff Review", "type": "main", "index": 0 }]]
    }
  }
}