Real Git review-guide path verification
main application: 6575ce3250
PR application: 59e5a812f9776f11bd66bf379b239f0f0924e2fa
Codex model used in app: gpt-6.1-sol
scenario base: aa4a307cad68dcf5ff3d9ebaecb014c66555adb0
scenario head: 121d88e6cd37eeb306da454f18b0e01e665e6ef1
git diff --name-only -z and git diff --unified=0 main...HEAD

main
"src/gone\tfile.ts": null
"src/index.ts": {"new":[{"start":2,"end":4}],"old":[]}
"src/legacy\\rates.ts": null
"src/price format.ts": null
"src/quote\"name.ts": null
"src/tab\tname.ts": null
PR
"src/gone\tfile.ts": {"new":[],"old":[{"start":1,"end":3}]}
"src/index.ts": {"new":[{"start":2,"end":4}],"old":[]}
"src/legacy\\rates.ts": {"new":[{"start":2,"end":4}],"old":[]}
"src/price format.ts": {"new":[{"start":2,"end":4}],"old":[]}
"src/quote\"name.ts": {"new":[{"start":2,"end":4}],"old":[]}
"src/tab\tname.ts": {"new":[{"start":2,"end":4}],"old":[]}

Persisted guide after real UI -> server -> Codex generation:
{
  "headSha": "121d88e6cd37eeb306da454f18b0e01e665e6ef1",
  "model": {
    "instanceId": "codex",
    "model": "gpt-6.1-sol"
  },
  "excerpts": [
    {
      "path": "src/index.ts",
      "side": "new",
      "start": 2,
      "end": 4,
      "caption": "total calculation validates both operands"
    },
    {
      "path": "src/legacy\\rates.ts",
      "side": "new",
      "start": 2,
      "end": 4,
      "caption": "the literal backslash filename contains the same contract for rates"
    },
    {
      "path": "src/quote\"name.ts",
      "side": "new",
      "start": 2,
      "end": 4,
      "caption": "the literal quote filename contains quote validation"
    },
    {
      "path": "src/tab\tname.ts",
      "side": "new",
      "start": 2,
      "end": 4,
      "caption": "the literal tab filename contains discount validation"
    },
    {
      "path": "src/price format.ts",
      "side": "new",
      "start": 2,
      "end": 4,
      "caption": "the filename contains a space; formatting retains toFixed(2)"
    },
    {
      "path": "src/gone\tfile.ts",
      "side": "old",
      "start": 1,
      "end": 3,
      "caption": "the deleted filename contains a literal tab"
    }
  ]
}

Blacksmith checks: normalizer 9/9 passed; guide service 17/17 passed.