gt-email-infra SKILL.md skillA
gt-email-infra from growth-today/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add growth-today/claude-skills/gt-email-infra@v5.1.0Pins v5.1.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- growth-today/claude-skills
- Path
gt-email-infra/SKILL.md- Versions recorded
- 5
- Latest version
- v5.1.0, committed Sep 24, 2026
- First version recorded
- Jul 30, 2026
- Size
- 17,552 bytes
- Repository stars
- 6
- License
- MIT
Email Infrastructure & Deliverability by Growth Today (growthtoday.co). Expert cold-email infrastructure and deliverability strategist. Use for infrastructure sizing, domain research and purchasing, DNS and auth (MX/SPF/DKIM/DMARC), masking versus redirect, mailbox provisioning, Instantly inbox setup and warmup, going live, campaign building and ESP/SEG routing, inbox-health dashboards, and blacklist/bounce auditing. Works across EmailBison, Instantly, Smartlead and Lemlist, with runnable…
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
## Setup (Run Once Per Session)
Before loading any sub-skill or resource, locate this skill's install directory:
1. Use Glob to search for `**/gt-email-infra/SKILL.md`.
2. The directory containing this SKILL.md is `SKILL_BASE`.
3. Sub-skills are at: `{SKILL_BASE}/.claude/skills/{sub-skill}/gt-SKILL.md`.
4. Resources are at: `{SKILL_BASE}/resources/...`.
Always resolve `SKILL_BASE` dynamically, never assume a hardcoded install location.
# Email Infrastructure & Deliverability, Orchestrator
This skill is the *plumbing that gets cold email delivered*, not the message itself. Route by **who you are** and **what you're doing** to the one sub-skill that matches. Each sub-skill is self-contained and ends in a copy-pasteable checklist.
Platform: this skill supports the sequencers Growth Today uses, **EmailBison, Instantly, Smartlead, and Lemlist**. Use the matching setup sub-skill for whichever you run. Concepts are ESP-agnostic; platform-specific steps are called out inline.
## When NOT to use this skill
- Writing the email, subject lines, body, sequences, personalization → `gt-cold-email-writer`.
- Building or verifying the lead list → `gt-list-builder`.
…Read the whole file at its exact version.
How to install
mdr add growth-today/claude-skills/gt-email-infra@sha256:f0cc79a49d9ea557The line at the top of this page pins the label v5.1.0, 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_7wulymqnooiv25xi)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Jul 30, 2026 and Sep 24, 2026, about one every 14 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v5.1.0 latest | 2026-09-24 | ae85ae4 | 17,552 B | A | view · diff |
| v5.1.0 | 2026-09-24 | 97397e2 | 18,581 B | A | view · diff |
| v5.1.0 | 2026-09-03 | 23417a5 | 18,563 B | A | view · diff |
| v5.1.0 | 2026-09-02 | 4fec68c | 17,540 B | A | view · diff |
| v5.0.0 | 2026-07-30 | 84f7fb8 | 9,530 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 (17552 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
growth-today/claude-skills · 6 stars · license MIT · pushed 2026-10-13 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_7wulymqnooiv25xi GET https://markdownregistry.com/api/v1/resolve?ref=growth-today/claude-skills/gt-email-infra GET https://markdownregistry.com/api/v1/blob/f0cc79a49d9ea557a734d986aefb55d706596c2beacd245898b2a81e271375f6
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.