diff --git a/.changeset/docs-gen-bare-path-in-parens.md b/.changeset/docs-gen-bare-path-in-parens.md
new file mode 100644
index 0000000000..5eb6b056ca
--- /dev/null
+++ b/.changeset/docs-gen-bare-path-in-parens.md
@@ -0,0 +1,28 @@
+---
+"@objectstack/spec": patch
+---
+
+fix(spec): 参考页里写在括号中的裸源码路径重新成链接 (#6420)
+
+参考页开篇那段模块描述由 `packages/spec/scripts/lib/file-description.ts` 渲染。其中
+把 JSDoc 里裸写的 `*.zod.ts` 路径改写成站内链接的那一步,正则两端各挂着一个前后瞻
+——「前面不是 `(`」和「后面不是 `)`」。这对前后瞻是 tokenizer 出现**之前**的产物,
+本意是「别去动已经是链接目标的路径」:`](route)` 恰好把那个路径夹在这两个字符中间。
+它从来表达不了这件事(前后瞻说不出「不在链接内部」,模块注释里写着),而 #6136 之后
+它更是无事可做了 —— 成形的链接是独立的 `link` token,这一步只会看到 `text` token。
+
+它**仍在**做的,是把作者自己写在普通括号里的每一个路径一并拒掉。那是散文,不是链接,
+于是这些路径既没成链接也没成代码,以纯文本发布在三张参考页上:
+
+- `references/automation/etl` —— `- **Enterprise Connector** (integration/connector.zod.ts) - …`
+- `references/integration/connector` —— `- **ETL Pipeline** (automation/etl.zod.ts) - …`
+- `references/shared/mapping` —— `- Integration connectors (integration/connector.zod.ts)` 与 `- External lookups (data/external-lookup.zod.ts)`
+
+现在删掉这对前后瞻,它们原本想守的不变量交还给 tokenizer 守。读者可见的变化就是上面
+四处从纯文本变成可点的站内链接,路由分别指向 `/docs/references/integration/connector`、
+`/docs/references/automation/etl`、`/docs/references/data/external-lookup` —— 三条都
+对应真实存在的页面。
+
+放宽的**实测**半径就是这四处,别无其他:在修好的生成器上重跑 `gen:docs`,231 个产物
+里 3 个文件、4 行发生变化。渲染成链接的前提没有放宽 —— 目标没有页面的路径照旧回退成
+代码段,所以括号位置永远不会产出 404。
diff --git a/content/docs/references/automation/etl.mdx b/content/docs/references/automation/etl.mdx
index 4bfd3a8429..0275a7ee94 100644
--- a/content/docs/references/automation/etl.mdx
+++ b/content/docs/references/automation/etl.mdx
@@ -13,7 +13,7 @@ Inspired by modern data integration platforms like Airbyte, Fivetran, and Apache
 retired in #4738 — narrative-only, zero consumers; see
 `packages/spec/docs/SYNC_ARCHITECTURE.md`):
 - **ETL Pipeline** (THIS FILE) - Data engineers - Aggregate 10 sources to warehouse
-- **Enterprise Connector** (integration/connector.zod.ts) - System integrators - Full SAP integration; connector-attached sync via `syncConfig`
+- **Enterprise Connector** ([integration/connector.zod.ts](/docs/references/integration/connector)) - System integrators - Full SAP integration; connector-attached sync via `syncConfig`
 
 ETL pipelines enable automated data synchronization between systems, transforming
 data as it moves from source to destination.
diff --git a/content/docs/references/integration/connector.mdx b/content/docs/references/integration/connector.mdx
index 23f28ce36b..c109cc96fa 100644
--- a/content/docs/references/integration/connector.mdx
+++ b/content/docs/references/integration/connector.mdx
@@ -14,7 +14,7 @@ and message queues through a unified protocol.
 **Positioning in the sync/integration layering** (L1 "Simple Sync" was
 retired in #4738 — narrative-only, zero consumers; see
 `packages/spec/docs/SYNC_ARCHITECTURE.md`):
-- **ETL Pipeline** (automation/etl.zod.ts) - Data engineers - Aggregate 10 sources to warehouse
+- **ETL Pipeline** ([automation/etl.zod.ts](/docs/references/automation/etl)) - Data engineers - Aggregate 10 sources to warehouse
 - **Enterprise Connector** (THIS FILE) - System integrators - Full SAP integration; connector-attached sync via `syncConfig`
 
 **SCOPE: Most comprehensive integration layer.**
diff --git a/content/docs/references/shared/mapping.mdx b/content/docs/references/shared/mapping.mdx
index 88fb9ca0bf..e4873d23e8 100644
--- a/content/docs/references/shared/mapping.mdx
+++ b/content/docs/references/shared/mapping.mdx
@@ -13,8 +13,8 @@ This module provides the canonical field mapping schema used across
 ObjectStack for data synchronization.
 
 **Use Cases:**
-- Integration connectors (integration/connector.zod.ts)
-- External lookups (data/external-lookup.zod.ts)
+- Integration connectors ([integration/connector.zod.ts](/docs/references/integration/connector))
+- External lookups ([data/external-lookup.zod.ts](/docs/references/data/external-lookup))
 
 @example Basic field mapping
 ```typescript
diff --git a/packages/spec/scripts/file-description.test.ts b/packages/spec/scripts/file-description.test.ts
index 561da8e47c..09a5b9c646 100644
--- a/packages/spec/scripts/file-description.test.ts
+++ b/packages/spec/scripts/file-description.test.ts
@@ -553,6 +553,112 @@ describe('renderFileDescription — #6229: a bare path keeps its `../` prefix in
   });
 });
 
+/**
+ * #6420 — a path an author wrote in PARENTHESES is prose, not a link.
+ *
+ * The rewriter carried a lookaround pair, `(?<!\()` … `(?!\))`, from before the
+ * tokenizer existed. Its job was "do not touch a path that is already a link's
+ * destination", because `](route)` puts that path between exactly those two
+ * characters. It never could state that (lookaround cannot say "not nested
+ * inside a link" — the module comment is explicit), and since #6136 it has had
+ * nothing left to state: a formed link is a `link` run and this step is only
+ * ever shown `text` runs. What the pair still did was refuse every path an
+ * author had put in ordinary parentheses, which is neither a link nor code —
+ * so those paths rendered as bare text on three published pages:
+ *
+ *   automation/etl.mdx:16        `- **Enterprise Connector** (integration/connector.zod.ts) - …`
+ *   integration/connector.mdx:17 `- **ETL Pipeline** (automation/etl.zod.ts) - …`
+ *   shared/mapping.mdx:16-17     `- Integration connectors (integration/connector.zod.ts)` (+ external-lookup)
+ *
+ * MEASURED (reverse verification), the ordinary direction: putting either
+ * guard back turns the four parenthesised cases below red — the two-sided pair
+ * and each half on its own, since a path in `(…)` trips both — while the
+ * unparenthesised cases and the whole #6229 block above stay green. Restoring
+ * them also leaves `keeps a formed link's destination out of reach` green,
+ * which is the point of that case: it is the tokenizer that holds the
+ * invariant now, so removing the guards cannot re-open #6136.
+ *
+ * Corpus-wide the widening is exactly those four positions and nothing else
+ * (`gen:docs` on the fixed generator: 231 files, 3 changed, 4 lines), and all
+ * three routes it newly emits resolve to a real page.
+ */
+describe('renderFileDescription — #6420: a bare path in parentheses still links', () => {
+  const ctx = {
+    // Mirrors `build-docs.ts`'s `sourcePathToDocsRoute`, restricted to the two
+    // categories these cases name, so an unroutable path is genuinely
+    // unroutable rather than a stand-in that resolves everything.
+    sourcePathToDocsRoute: (t: string) => {
+      const m = /(?:^|\/)(integration|automation)\/([\w-]+)\.zod\.ts$/.exec(t);
+      return m ? `/docs/references/${m[1]}/${m[2]}` : null;
+    },
+  };
+
+  const describedBy = (line: string) =>
+    renderFileDescription(['/**', ` * ${line}`, ' */', '', "import { z } from 'zod';", ''].join('\n'), ctx);
+
+  it('links a parenthesised path — the published `automation/etl` line', () => {
+    // `packages/spec/src/automation/etl.zod.ts` verbatim — the exact input
+    // behind `content/docs/references/automation/etl.mdx:16`.
+    expect(
+      describedBy('- **Enterprise Connector** (integration/connector.zod.ts) - System integrators'),
+    ).toBe(
+      '- **Enterprise Connector** ([integration/connector.zod.ts](/docs/references/integration/connector)) - System integrators',
+    );
+  });
+
+  it('links a parenthesised path that closes the line — the `shared/mapping` shape', () => {
+    // `content/docs/references/shared/mapping.mdx:16`. Distinct from the case
+    // above on purpose: there the `)` is followed by more prose, here it ends
+    // the line, and the trailing guard `(?!\))` refused both.
+    expect(describedBy('- Integration connectors (integration/connector.zod.ts)')).toBe(
+      '- Integration connectors ([integration/connector.zod.ts](/docs/references/integration/connector))',
+    );
+  });
+
+  it('keeps a `../` prefix inside the link when the path is parenthesised', () => {
+    // #6229 and this fix compose: the prefix belongs inside the link, and the
+    // parentheses stay outside it. Neither fix implies the other.
+    expect(describedBy('The layer (../integration/connector.zod.ts) is the widest.')).toBe(
+      'The layer ([../integration/connector.zod.ts](/docs/references/integration/connector)) is the widest.',
+    );
+  });
+
+  it('prints an unroutable parenthesised path as code, never as a dead link', () => {
+    // Widening the rewriter must not widen what it is willing to LINK. A path
+    // with no page still falls back to a code span, so the parentheses can
+    // never produce a 404 on the site.
+    expect(describedBy('Nothing here (nowhere/absent.zod.ts) resolves.')).toBe(
+      'Nothing here (`nowhere/absent.zod.ts`) resolves.',
+    );
+  });
+
+  it('still links the same path outside parentheses — the fix widens, it does not move', () => {
+    // The vacuity guard for the four cases above. Each of them asserts an
+    // OUTPUT for a path in parentheses; if this `ctx` had stopped resolving
+    // that path, the parenthesised cases could have been written around a
+    // code-span fallback and passed while proving nothing. Pinning the same
+    // path unparenthesised fixes the only variable to the parentheses.
+    expect(describedBy('The layer integration/connector.zod.ts is the widest.')).toBe(
+      'The layer [integration/connector.zod.ts](/docs/references/integration/connector) is the widest.',
+    );
+  });
+
+  it('keeps a formed link destination out of reach — the tokenizer, not the guards', () => {
+    // The case the deleted lookaround was actually written for, and the reason
+    // deleting it is safe. A titled `{@link}` whose target has no page emits
+    // `[label](../nowhere/absent.zod.ts)`: the raw path is now a link
+    // DESTINATION, sitting between the very `(` and `)` the guards tested for.
+    // With them gone the only thing standing between that path and a second
+    // rewrite is #6136's tokenizer, which classifies the whole construct as a
+    // `link` run this step is never shown. Were that protection to regress,
+    // this case reports `[the fallback](\`../nowhere/absent.zod.ts\`)` — the
+    // #6136 shape — while every other case here stays green.
+    expect(describedBy('See {@link ../nowhere/absent.zod.ts|the fallback} for now.')).toBe(
+      'See [the fallback](../nowhere/absent.zod.ts) for now.',
+    );
+  });
+});
+
 /**
  * The corpus half: re-derive the verdict from the real sources, so the six
  * pages the issue measured cannot silently re-acquire a wrong opening, and so a
@@ -790,6 +896,32 @@ describe('corpus — every rendered description is well-formed markdown', () =>
     expect(offenders).toEqual([]);
   });
 
+  it('never leaves a bare source path sitting in parentheses (#6420)', () => {
+    // The corpus half of the unit block above. A path this step CAN match —
+    // one with a category segment, `(?:\.\./)*<dir>/<file>.zod.ts` — must never
+    // reach a page still bare: it is a link when a page renders it and a code
+    // span when none does, and "plain text between parentheses" is the one
+    // outcome the lookaround pair used to force. Scanned on the rendered
+    // fragment rather than on the emitted `.mdx` for the same reason the rest
+    // of this file is: `check:docs` reproduces the artifact faithfully and so
+    // stayed green through all three published symptoms.
+    //
+    // Only the head character is examined, not a full `(…)` pair: `- Integration
+    // connectors (integration/connector.zod.ts)` and `(…) - System integrators`
+    // are different closers and both were victims, so what identifies the class
+    // is a `(` immediately before the path. A path that follows `](` is a link
+    // destination and belongs there — the tokenizer put it there.
+    const offenders: string[] = [];
+    for (const { rel, out } of described) {
+      for (const line of withoutFences(out).split('\n')) {
+        const bare = line.replace(/`[^`]*`/g, ''); // a code span is the null-route fallback
+        const hit = /(^|[^\]])\((?:\.\.\/)*[\w-]+\/[\w.-]+\.zod\.ts/.exec(bare);
+        if (hit) offenders.push(`${rel}: ${hit[0].trim()}`);
+      }
+    }
+    expect(offenders).toEqual([]);
+  });
+
   it('keeps a description for every source that had one — #6134 selection is untouched', () => {
     // The rendering fix must not remove a page's opening paragraph; that is
     // #5059's acceptance criterion and it still binds. 185 sources carry a
diff --git a/packages/spec/scripts/lib/file-description.ts b/packages/spec/scripts/lib/file-description.ts
index c3604e8981..5c36978899 100644
--- a/packages/spec/scripts/lib/file-description.ts
+++ b/packages/spec/scripts/lib/file-description.ts
@@ -386,8 +386,21 @@ function renderProse(text: string, ctx: FileDescriptionContext): string {
   // `*` without moving the `\b` changes nothing, since a group that is never
   // reached repeats zero times either way. Both halves are load-bearing —
   // moving the `\b` alone would still strand the outer level of a `../../`.
+  //
+  // No lookaround guards the parentheses any more (#6420). The pair `(?<!\()`
+  // … `(?!\))` was this step's ORIGINAL, pre-tokenizer attempt at "do not touch
+  // a path that is already a link's destination" — `](route)` puts that path
+  // between exactly those two characters. It never could express that (the
+  // module comment above says why: lookaround cannot say "not nested inside a
+  // link"), and since #6136 it has had nothing left to do — a formed link is a
+  // `link` run and this step is only shown `text` runs. What the pair still did
+  // was refuse every path an AUTHOR wrote in parentheses, which is ordinary
+  // prose and not a link at all: `- **Enterprise Connector**
+  // (integration/connector.zod.ts) - …` rendered as neither a link nor code,
+  // just plain text, on three published pages. So the guards go and the
+  // tokenizer keeps the invariant they were reaching for.
   out = mapProse(out, ['text'], s =>
-    s.replace(/(?<!\()((?:\.\.\/)*\b[\w-]+\/[\w.-]+\.zod\.ts)\b(?!\))/g, (_m, p: string) => {
+    s.replace(/((?:\.\.\/)*\b[\w-]+\/[\w.-]+\.zod\.ts)\b/g, (_m, p: string) => {
       const route = sourcePathToDocsRoute(p);
       return route ? `[${p}](${route})` : `\`${p}\``;
     }));