実際のコード変更。4 つのテストに合格しました。

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import assert from "node:assert/strict";
import test from "node:test";
import { slugify } from "./slugify.mjs";

test("lowercases and joins words", () => {
  assert.equal(slugify("Hello World"), "hello-world");
});
test("trims whitespace and collapses punctuation", () => {
  assert.equal(slugify("  Hello,   World!  "), "hello-world");
});
test("collapses repeated separators", () => {
  assert.equal(slugify("API___  migration---kit"), "api-migration-kit");
});
test("keeps digits and returns empty for punctuation only", () => {
  assert.equal(slugify("Version 42"), "version-42");
  assert.equal(slugify(" !!! "), "");
});

{
  "date": "2026-10-14",
  "platform": "Windows",
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    "opencode": "1.19.0"
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  "source_commit": "b71ebf5e09b761f958c643075b8e0a5d3032e44f",
  "prompt": "Fix slugify.mjs so all four existing tests pass. Lowercase ASCII letters, preserve digits, replace runs of other characters with one hyphen, and trim leading/trailing hyphens. Do not change slugify.test.mjs. Run node --test slugify.test.mjs and report the result.",
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      "command": "node --test slugify.test.mjs",
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      "output": "✔ lowercases and joins words (2.3435ms)\n✔ trims whitespace and collapses punctuation (0.2539ms)\n✔ collapses repeated separators (0.2248ms)\n✔ keeps digits and returns empty for punctuation only (0.1989ms)\nℹ tests 4\nℹ suites 0\nℹ pass 4\nℹ fail 0\nℹ cancelled 0\nℹ skipped 0\nℹ todo 0\nℹ duration_ms 212.5302\n"
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  "final_code": "export function slugify(text) {\n  return text\n    .toLowerCase()\n    .replace(/[^a-z0-9]+/g, \"-\")\n    .replace(/^-+|-+$/g, \"\");\n}\n",
  "final_reply": "All 4 tests pass:\n\n```\n✔ lowercases and joins words\n✔ trims whitespace and collapses punctuation\n✔ collapses repeated separators\n✔ keeps digits and returns empty for punctuation only\ntests 4, pass 4, fail 0\n```\n\nThe fix in slugify.mjs: lowercase, replace runs of non-`[a-z0-9]` characters with a single hyphen, then trim leading/trailing hyphens.",
  "independent_rerun": {
    "exit_code": 0,
    "stdout": "✔ lowercases and joins words (1.8327ms)\n✔ trims whitespace and collapses punctuation (0.2687ms)\n✔ collapses repeated separators (0.178ms)\n✔ keeps digits and returns empty for punctuation only (0.1737ms)\nℹ tests 4\nℹ suites 0\nℹ pass 4\nℹ fail 0\nℹ cancelled 0\nℹ skipped 0\nℹ todo 0\nℹ duration_ms 198.9705\n"
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