Query: SEO / Breadcrumbs / directory without _index.md or index.md

Hi All,

Long time no posting or visiting. I am in the process of updating my blog. I was wondering if anyone could confirm or deny that my current breadcrumb system is ok for Google SEO or not.

Theme: BeautifulHugo

I have a fairly simple structure

contents→post (Most posts live here)

contents→post→python (contains _index.md) standard sub-branch

contents→post→rust (no index.md or _index.md)

My breadcrumbs.html partial is currently this

{{- $items := slice -}}
{{- $position := 1 -}}

{{/* Home */}}
{{- $items = $items | append (dict
  "@type" "ListItem"
  "position" $position
  "name" "Home"
  "item" .Site.BaseURL
) -}}

{{/* Loop through Ancestors */}}
{{- range where .Ancestors.Reverse "IsHome" false -}}
  {{- $position = add $position 1 -}}

  {{/* Get Directory name .Title is not set */}}
  {{- $segments := split (trim .Path "/") "/" -}}
  {{- $last := index $segments (sub (len $segments) 1) -}}
  {{- $title := .Title | default $last -}}

  {{- $items = $items | append (dict
    "@type" "ListItem"
    "position" $position
    "name" $title
    "item" .Permalink
  ) -}}
{{- end -}}

{{/* Current page */}}
{{- if not .IsHome -}}
  {{- $position = add $position 1 -}}
  {{- $items = $items | append (dict
    "@type" "ListItem"
    "position" $position
    "name" .Title
    "item" .Permalink
  ) -}}
{{- end -}}

<script type="application/ld+json">
{{ dict
  "@context" "https://schema.org"
  "@type" "BreadcrumbList"
  "itemListElement" $items
| jsonify (dict "indent" "  ") | safeJS }}
</script>

This works well for directories that have a _index.md so my crumb give the full path.

I also have directories like “rust”, “hugo” which do not contain any “_index.md” or “index.md” and my code generates the following

<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "BreadcrumbList",
  "itemListElement": [
    {
      "@type": "ListItem",
      "item": "http://localhost:1313/",
      "name": "Home",
      "position": 1
    },
    {
      "@type": "ListItem",
      "item": "http://localhost:1313/post/",
      "name": "BlogPostings",
      "position": 2
    },
    {
      "@type": "ListItem",
      "item": "http://localhost:1313/post/rust/decon-spf-0-2-6/",
      "name": "Decon-Spf Version 0.2.6",
      "position": 3
    }
  ]
}
</script>

Note the leap from /post/ in position 2 and /post/rust/decon-spf-0-2-6/ for position 3.

The directory /rust/ returns a 404 which I expect.

My question is will SEO have issues with this? Or is this bad SEO?

Note: The default breadcrumb builder for BeautifulHugo is currently hardcoded, so I am trying to create something more dynamic.

Thougts and suggested requested.