404-page-generator SKILL.md skillA
404-page-generator from kostja94/marketing-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add kostja94/marketing-skills/404-page-generator@git:20260925.e6c43e0Pins git:20260925.e6c43e0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- kostja94/marketing-skills
- Path
skills/pages/utility/404/SKILL.md- Versions recorded
- 6
- Latest version
- git:20260925.e6c43e0, committed Sep 25, 2026
- First version recorded
- Feb 28, 2026
- Size
- 753 bytes
- Repository stars
- 1,089
- License
- MIT
Deprecated compatibility entry for 404 Page construction. This page is now maintained in Pagina; install and use page-builder to build a new 404 Page.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# 404 Page construction has moved 404 Page construction is now maintained in the [404 Page reference](https://github.com/kostja94/pagina/blob/main/skills/page-builder/references/pages/404.md) in [Pagina](https://github.com/kostja94/pagina), the page intelligence layer for AI agents. ```bash npx skills add kostja94/pagina --skill page-builder ``` Ask the agent to use page-builder to build a new 404 Page. This compatibility entry contains no page rules and is no longer maintained.
Read the whole file at its exact version.
How to install
mdr add kostja94/marketing-skills/404-page-generator@sha256:7c1f79ea3e817fe1The line at the top of this page pins the label git:20260925.e6c43e0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_cdg5rmeewx3p32yq)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 6 versions of this file, between Feb 28, 2026 and Sep 25, 2026, about one every 42 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260925.e6c43e0 latest | 2026-09-25 | e6c43e0 | 753 B | A | view · diff |
| v1.0.1 | 2026-03-27 | f1ec9f7 | 2,865 B | A | view · diff |
| v1.0.0 | 2026-03-11 | 5cca54d | 2,814 B | A | view · diff |
| v1.0.0 | 2026-02-28 | b615388 | 2,844 B | A | view · diff |
| v1.0.0 | 2026-02-28 | f71005e | 2,756 B | A | view · diff |
| v1.0.0 | 2026-02-28 | 28ba327 | 2,777 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (753 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
kostja94/marketing-skills · 1,089 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_cdg5rmeewx3p32yq GET https://markdownregistry.com/api/v1/resolve?ref=kostja94/marketing-skills/404-page-generator GET https://markdownregistry.com/api/v1/blob/7c1f79ea3e817fe16688dfdc8fd5b2571079fa7dd0148652bab3987bc5740a87
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.