{
  "about": "edit: a file's content, the text to replace and its replacement (and `all`) → the new content, or the error the model is told. Exact match first; then OpenCode's tolerant matchers (trimmed lines, block anchors, whitespace, indentation, escapes); a match must be unique unless `all`.",
  "cases": [
    {
      "content": "a\nb\nc\n",
      "old": "b",
      "new": "B",
      "expect": {
        "content": "a\nB\nc\n"
      }
    },
    {
      "content": "a\nb\nb\n",
      "old": "b",
      "new": "B",
      "expect": {
        "error": "Found multiple matches for oldString. Provide more surrounding context to make the match unique."
      }
    },
    {
      "content": "a\nb\nb\n",
      "old": "b",
      "new": "B",
      "all": true,
      "expect": {
        "content": "a\nB\nB\n"
      }
    },
    {
      "content": "a\nb\nc\n",
      "old": "x",
      "new": "y",
      "expect": {
        "error": "Could not find oldString in the file. It must match exactly, including whitespace, indentation, and line endings."
      }
    },
    {
      "content": "a\nb\nc\n",
      "old": "b",
      "new": "b",
      "expect": {
        "error": "No changes to apply: oldString and newString are identical."
      }
    },
    {
      "content": "def f():\n    return 1\n",
      "old": "def f():\n  return 1",
      "new": "def f():\n    return 2",
      "expect": {
        "content": "def f():\n    return 2\n"
      }
    },
    {
      "content": "  x = 1\n",
      "old": "x = 1",
      "new": "x = 2",
      "expect": {
        "content": "  x = 2\n"
      }
    },
    {
      "content": "if a:\n    b()\n    c()\nend\n",
      "old": "if a:\n    b()\n    c()",
      "new": "if a:\n    d()",
      "expect": {
        "content": "if a:\n    d()\nend\n"
      }
    },
    {
      "content": "text\\nmore\n",
      "old": "text\\nmore",
      "new": "t",
      "expect": {
        "content": "t\n"
      }
    },
    {
      "content": "one  two\n",
      "old": "one two",
      "new": "three",
      "expect": {
        "content": "three\n"
      }
    }
  ]
}