kostja94/marketing-skills · skills/components/conversion/newsletter-signup/SKILL.md

newsletter-signup-generator skillA

newsletter-signup-generator is agent-read markdown (skill) from kostja94/marketing-skills: When the user wants to design, optimize, or audit newsletter signup forms. Also use when the user mentions "newsletter," "email signup," "subscribe form," "email capture," "lead magnet," "newsletter form," "email opt-in," "subscribe CTA," "newsletter signup," or "email list building." For email strategy, use email-marketing..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add kostja94/marketing-skills/newsletter-signup-generator@v1.0.1
Exact content
mdr add kostja94/marketing-skills/newsletter-signup-generator@sha256:811fbdc9b84b2029

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_6w4zm2cmxzj2omer.svg)](https://markdownregistry.com/a/art_6w4zm2cmxzj2omer)

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Versions

versioncommittedcommitsizeaudit
v1.0.1 latest2026-03-27 f1ec9f7 3,364 BA view · diff
v1.0.02026-03-11 5cca54d 3,323 BA view · diff
v1.0.02026-03-11 9abc679 3,353 BA view · diff
v1.0.02026-03-06 f6d1391 3,268 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (3364 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

GitHub

kostja94/marketing-skills · 976 stars · license MIT · pushed 2026-06-09 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_6w4zm2cmxzj2omer
GET https://markdownregistry.com/api/v1/resolve?ref=kostja94/marketing-skills/newsletter-signup-generator
GET https://markdownregistry.com/api/v1/blob/811fbdc9b84b2029cb8133fd418d310759ed2b31d1e4bad3b8d2dcf2f3e55077

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