---
{
  "n": 35,
  "title": "Write clean code - one funnel per kind of operation, never the same method twice",
  "abstract": "",
  "refs": [],
  "seen": [
    "agent",
    "user"
  ],
  "data": {
    "keywords": [
      "funnel",
      "duplicate",
      "twice",
      "same method",
      "helper"
    ],
    "kept": false
  },
  "created": 1790027209.442487,
  "updated": 1790093402.6762292,
  "deleted": 0.0,
  "completed": 0.0,
  "outcome": "",
  "type": "rule"
}
---
Every kind of operation has one funnel: one method that creates, one that saves, one that refuses, one that formats. A second method that does the same thing under another name splits the behaviour, and the two drift apart. Before writing a method, search for the one that already does it and extend that. scripts/checks/funnels.py finds bodies written twice.