[
  {
    "method": "Real Chromium interaction with shared editor; scripted input, no model execution",
    "steps": [
      "created optional instruction in Project guidance",
      "inspected source",
      "edited instruction with shared editor",
      "previewed Markdown",
      "saved locally, no commit",
      "confirmed exact file contains revised instruction"
    ],
    "guidanceBefore": "---\ntype: Reference\ntitle: Project guidance\ndescription: Project-authored standards and scoped procedure links.\n---\n\n\n# Active guidance\n\n- Requirement: Prefer short imperative sentences. Scope: Contributor-facing documentation.\n",
    "guidanceAfter": "---\ntype: Reference\ntitle: Project guidance\ndescription: Project-authored standards and scoped procedure links.\n---\n# Active guidance\n\n- Requirement: Use numbered steps for contributor instructions. Prefer short imperative sentences, with an explanation when a step needs context. Scope: Contributor-facing documentation."
  }
]