fix: harden codex copied skill rewriting (#285)

tests/claude-home.test.ts

@@ -61,4 +61,22 @@ describe("loadClaudeHome", () => {
     expect(config.skills[0]?.description).toBe("Reviewer skill")
     expect(config.skills[0]?.argumentHint).toBe("[topic]")
   })
+
+  test("keeps personal skills when frontmatter is malformed", async () => {
+    const tempHome = await fs.mkdtemp(path.join(os.tmpdir(), "claude-home-skill-yaml-"))
+    const skillDir = path.join(tempHome, "skills", "reviewer")
+
+    await fs.mkdir(skillDir, { recursive: true })
+    await fs.writeFile(
+      path.join(skillDir, "SKILL.md"),
+      "---\nname: ce:plan\nfoo: [unterminated\n---\nReview things.\n",
+    )
+
+    const config = await loadClaudeHome(tempHome)
+
+    expect(config.skills).toHaveLength(1)
+    expect(config.skills[0]?.name).toBe("reviewer")
+    expect(config.skills[0]?.description).toBeUndefined()
+    expect(config.skills[0]?.argumentHint).toBeUndefined()
+  })
 })