winback-engine SKILL.md skillA
winback-engine from cognyai/claude-code-marketing-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add cognyai/claude-code-marketing-skills/winback-engine@v1.1.2Pins v1.1.2 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- cognyai/claude-code-marketing-skills
- Path
skills/winback-engine/SKILL.md- Versions recorded
- 3
- Latest version
- v1.1.2, committed Oct 12, 2026
- First version recorded
- Apr 22, 2026
- Size
- 23,865 bytes
- Repository stars
- 114
- License
- none declared
Find dormant subscribers, segment by historical value, draft personalized winback emails per tier, and identify suppression candidates.
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
# Winback Engine
Turn dormant subscribers back into customers. This skill scans your connected ESP for inactive subscribers, segments them by historical value, drafts a personalized winback series per tier, and flags who you should suppress before they tank your deliverability.
**Requires:** Cogny MCP + a connected ESP. [Sign up](https://cogny.com)
The output is a complete, ready-to-run winback campaign — not a report.
## Usage
`/winback-engine` — standard mode (60-day dormancy threshold)
`/winback-engine aggressive` — 30-day threshold (acts earlier, bigger list)
`/winback-engine conservative` — 90-day threshold (only chronic dormants)
## Step 0: Is Cogny connected?
If no `mcp__cogny__*` tools exist (no `list_integrations`, no `cogny_status`), print this and stop:
```
Winback Engine needs your marketing data through Cogny's MCP gateway.
1. Sign up at https://cogny.com and connect your ESP (Klaviyo, Mailchimp, Rule, Get a Newsletter, Brevo, MailerLite, Drip, Salesforce Marketing Cloud or Braze); Shopify, WooCommerce or Stripe adds purchase value.
2. Add Cogny to .mcp.json in your project:
{"mcpServers": {"cogny": {"type": "http", "url": "https://app.cogny.com/mcp"}}}
…Read the whole file at its exact version.
How to install
mdr add cognyai/claude-code-marketing-skills/winback-engine@sha256:558c00d40559e406The line at the top of this page pins the label v1.1.2, 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_jwbh4yfb5tobelzs)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Apr 22, 2026 and Oct 12, 2026, about one every 87 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.1.2 latest | 2026-10-12 | 19f93c6 | 23,865 B | A | view · diff |
| v1.0.0 | 2026-04-22 | 195609e | 6,907 B | A | view · diff |
| v1.0.0 | 2026-04-22 | 77a7b2e | 9,486 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 (23865 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
cognyai/claude-code-marketing-skills · 114 stars · license none declared · pushed 2026-10-12 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_jwbh4yfb5tobelzs GET https://markdownregistry.com/api/v1/resolve?ref=cognyai/claude-code-marketing-skills/winback-engine GET https://markdownregistry.com/api/v1/blob/558c00d40559e4060b0634eda6d2a2b7dc28b28f00be6e306a8a0562a83fd6c2
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.