test(codex): guard package-qualified install docs

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

script/lazycodex-install-docs.test.ts

@@ -0,0 +1,38 @@
+/// <reference types="bun-types" />
+
+import { describe, expect, test } from "bun:test"
+import { readFileSync } from "node:fs"
+
+const repoRoot = new URL("../", import.meta.url)
+
+const installDocs = [
+  "README.md",
+  "README.ko.md",
+  "README.ja.md",
+  "README.ru.md",
+  "README.zh-cn.md",
+  "docs/guide/installation.md",
+  "docs/reference/cli.md",
+  "packages/omo-codex/README.md",
+  "packages/omo-codex/MARKETPLACE.md",
+  "packages/omo-codex/plugin/components/comment-checker/README.md",
+  "packages/omo-codex/plugin/components/lsp/README.md",
+  "packages/omo-codex/plugin/components/rules/README.md",
+  "packages/omo-codex/plugin/components/ultrawork/README.md",
+  "packages/omo-codex/plugin/components/ulw-loop/README.md",
+]
+
+const UNQUALIFIED_OMO_INSTALL = /(^|[^\w@/-])bunx\s+omo\s+install\b/u
+
+describe("LazyCodex install documentation", () => {
+  test("uses the scoped package-backed command for Codex Light install surfaces", () => {
+    for (const docPath of installDocs) {
+      // #given
+      const content = readFileSync(new URL(docPath, repoRoot), "utf8")
+
+      // #then
+      expect(content, `${docPath} must not point users at the broken unscoped lazycodex package`).not.toContain("bunx lazycodex install")
+      expect(content, `${docPath} must not point users at the unrelated unscoped omo package`).not.toMatch(UNQUALIFIED_OMO_INSTALL)
+    }
+  })
+})