diff --git a/AGENTS.md b/AGENTS.md
index ba32fe688..a7741b503 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -4,7 +4,7 @@ This is the only agent guide for the repository. Its rules apply everywhere, inc
 
 ## Markdown style
 
-Write prose paragraphs and list items as single source lines and let editors and renderers wrap them naturally. Do not hard-wrap Markdown at a fixed column; preserve separate lines only where Markdown syntax or intentional formatting requires them, such as headings, lists, tables, blockquotes, and code blocks.
+Write prose paragraphs and list items as single source lines and let editors and renderers wrap them naturally. Do not hard-wrap Markdown at a fixed column; preserve separate lines only where Markdown syntax or intentional formatting requires them, such as headings, lists, tables, blockquotes, and code blocks. The Limitations page partials under `docs/content/limitations/` are the exception: they keep one sentence per line (see Limitations page partials).
 
 ## Build and test
 
@@ -196,7 +196,7 @@ The docs site is a standalone pnpm workspace under `docs/`. It uses Next.js App
 - A labeled bullet (`- **Crypto:** ...`) is `docs/content/limitations/<section>/<label>.mdx`, for example `builtin-apis/crypto.mdx`. Edit that file to change the bullet.
 - The other text of a section (paragraphs, code blocks, unlabeled lists) is `docs/content/limitations/<section>.mdx`; text before the first heading is `introduction.mdx`.
 - `<section>` and `<label>` are the heading and label text in lowercase with each run of other characters replaced by `-`.
-- Write one sentence per line; a bullet's continuation lines are indented two spaces. Markdown joins the lines, and edits to different sentences don't conflict.
+- Write one sentence per line; a bullet's continuation lines are indented two spaces. Markdown joins the lines, and edits to different sentences don't conflict. `pnpm lint` fails on a line that holds two sentences, and `node docs/scripts/limitations-partials.mjs fix` splits such lines.
 - To add a bullet, add its file and an include line at its position in `limitations.mdx`, with a blank line on each side. Consecutive bullet includes render as one list.
 - To add a section, add the heading to `limitations.mdx` and include the section's partial below it.
 
diff --git a/docs/content/limitations/unix-domain-sockets.mdx b/docs/content/limitations/unix-domain-sockets.mdx
index e98bc72e3..5f488ad38 100644
--- a/docs/content/limitations/unix-domain-sockets.mdx
+++ b/docs/content/limitations/unix-domain-sockets.mdx
@@ -1,2 +1,7 @@
-`server.listen(path)` and the `socketPath` option of `http.request()` and `https.request()` use Unix domain sockets on Linux and macOS. On Windows, where Node maps these paths to named pipes, they fail with `ENOTSUP`. `server.address()` on a server listening on a Unix socket returns the socket path, as in Node, when the result is typed `string | AddressInfo | null` (the @types/node declaration). Where it is typed as the `{ address, family, port }` record alone, which cannot hold the path, the call throws an error for such a server. `listen(path, backlog, callback)` is refused at compile time; pass `listen(path, callback)`.
-When the options of `http.request()` come from a variable, or from an object literal that spreads one, they are read at run time with Node's validation errors. The `auth`, `createConnection`, `family`, `hints`, `insecureHTTPParser`, `joinDuplicateHeaders`, `localAddress`, `localPort`, `lookup` and `uniqueHeaders` options then throw a runtime error when they hold a value, and so do `setHost: false` and `setDefaultHeaders: false`.
+`server.listen(path)` and the `socketPath` option of `http.request()` and `https.request()` use Unix domain sockets on Linux and macOS.
+On Windows, where Node maps these paths to named pipes, they fail with `ENOTSUP`.
+`server.address()` on a server listening on a Unix socket returns the socket path, as in Node, when the result is typed `string | AddressInfo | null` (the @types/node declaration).
+Where it is typed as the `{ address, family, port }` record alone, which cannot hold the path, the call throws an error for such a server.
+`listen(path, backlog, callback)` is refused at compile time; pass `listen(path, callback)`.
+When the options of `http.request()` come from a variable, or from an object literal that spreads one, they are read at run time with Node's validation errors.
+The `auth`, `createConnection`, `family`, `hints`, `insecureHTTPParser`, `joinDuplicateHeaders`, `localAddress`, `localPort`, `lookup` and `uniqueHeaders` options then throw a runtime error when they hold a value, and so do `setHost: false` and `setDefaultHeaders: false`.
diff --git a/docs/scripts/limitations-partials.mjs b/docs/scripts/limitations-partials.mjs
index 662930c13..08f1dcc5e 100644
--- a/docs/scripts/limitations-partials.mjs
+++ b/docs/scripts/limitations-partials.mjs
@@ -21,7 +21,13 @@
  *   node scripts/limitations-partials.mjs split <file> [page]  write the page and partials from one file
  *   node scripts/limitations-partials.mjs merge <base> <theirs>
  *       three-way merge a branch's single-file page (<theirs>, forked from
- *       <base>) into the current partials, then split the result */
+ *       <base>) into the current partials, then split the result
+ *   node scripts/limitations-partials.mjs check   fail on a partial line that holds two sentences
+ *   node scripts/limitations-partials.mjs fix     put each such sentence on its own line
+ *
+ * One sentence per line keeps changes to different sentences on different
+ * lines, so concurrent edits merge. Markdown joins the lines with a space,
+ * so the rendered page is the same. */
 import { execFileSync } from "node:child_process";
 import { mkdirSync, mkdtempSync, readFileSync, readdirSync, rmSync, writeFileSync } from "node:fs";
 import { tmpdir } from "node:os";
@@ -139,6 +145,41 @@ function write(text, page = defaultPage) {
   console.error(`${relative(docsRoot, page)}: ${partials.size} partials in ${relative(docsRoot, partialsDir)}/`);
 }
 
+// A sentence ends at `.`, `!` or `?` (after any closing `)`, `"` or `*`)
+// followed by a space and a capital letter, a code span, a link or bold
+// text. Abbreviations don't end one.
+const sentenceEnd = /(?<!\b(?:e\.g|i\.e|etc|vs|cf))([.!?][)"*]*) (?=[A-Z`[*])/g;
+
+/** The partial text with each sentence of a prose line on its own line;
+ * a bullet's sentences continue with the two-space indent. Code fences,
+ * headings, tables, HTML and include lines are left alone, as are code
+ * spans and link targets. */
+export function splitSentences(text) {
+  let inFence = false;
+  const out = [];
+  for (const line of text.split("\n")) {
+    if (/^\s*(```|~~~)/.test(line)) inFence = !inFence;
+    if (inFence || /^\s*(```|~~~|#|<|\||$)/.test(line)) {
+      out.push(line);
+      continue;
+    }
+    const indent = /^\s*(?:[-*]|\d+\.) /.test(line) ? "  " : line.match(/^\s*/)[0];
+    // Mask code spans (all but the opening backtick, which can start a
+    // sentence) and link targets, so their periods never split.
+    const masked = line.replace(/`[^`]*`|\]\([^)]*\)/g, (m) => m[0] + "\0".repeat(m.length - 1));
+    const pieces = [];
+    let start = 0;
+    for (const match of masked.matchAll(sentenceEnd)) {
+      const end = match.index + match[1].length;
+      pieces.push(line.slice(start, end));
+      start = end + 1;
+    }
+    pieces.push(line.slice(start));
+    out.push(pieces[0], ...pieces.slice(1).map((piece) => indent + piece));
+  }
+  return out.join("\n");
+}
+
 function listPartials(dir = partialsDir) {
   return readdirSync(dir, { withFileTypes: true }).flatMap((entry) =>
     entry.isDirectory() ? listPartials(join(dir, entry.name)) : [join(dir, entry.name)],
@@ -175,9 +216,20 @@ if (command === "join") {
   } finally {
     rmSync(work, { recursive: true, force: true });
   }
+} else if (command === "check" || command === "fix") {
+  let unsplit = 0;
+  for (const file of listPartials().sort()) {
+    const text = readFileSync(file, "utf8");
+    const split = splitSentences(text);
+    if (split === text) continue;
+    unsplit++;
+    if (command === "fix") writeFileSync(file, split);
+    else console.error(`${relative(docsRoot, file)}: put each sentence on its own line (node docs/scripts/limitations-partials.mjs fix)`);
+  }
+  if (command === "check" && unsplit > 0) process.exitCode = 1;
 } else if (command === "list") {
   for (const file of listPartials().sort()) console.log(relative(docsRoot, file));
 } else {
-  console.error("usage: limitations-partials.mjs join [page] | split <file> [page] | merge <base> <theirs> | list");
+  console.error("usage: limitations-partials.mjs join [page] | split <file> [page] | merge <base> <theirs> | check | fix | list");
   process.exitCode = 2;
 }
diff --git a/package.json b/package.json
index 03a763372..8ce43f4d6 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "test:sandbox": "node scripts/sandbox-test.mjs",
     "test:sandbox:image": "node scripts/sandbox-image.mjs",
     "test:watch": "vitest",
-    "lint": "oxlint --deny-warnings packages scripts internal/compatibility/src tests/harness vitest.config.ts",
+    "lint": "oxlint --deny-warnings packages scripts internal/compatibility/src tests/harness vitest.config.ts && node docs/scripts/limitations-partials.mjs check",
     "lint:fix": "pnpm lint --fix",
     "format": "oxfmt --write \"{packages,scripts,internal/compatibility/src,tests/harness}/**/*.{js,mjs,cjs,ts,mts,cts,tsx}\" vitest.config.ts .oxlintrc.jsonc .oxfmtrc.jsonc",
     "format:check": "oxfmt --check \"{packages,scripts,internal/compatibility/src,tests/harness}/**/*.{js,mjs,cjs,ts,mts,cts,tsx}\" vitest.config.ts .oxlintrc.jsonc .oxfmtrc.jsonc",