mailcheap / rules
Cursor rule1.6k starsChanged 4 days agoAGPL-3.0View on GitHub
Read AGENTS.md (and AGENTS.cloud.md where it exists) before working on MailCheap
We split this agents.mdc into the rules it gives an agent
3 rules. About 0 are common, 1 is distinctive, and 2 are very specific to this project.
≈0
Common · estimate
Many files like this have a rule of this kind.
≈1
Distinctive · estimate
This author's own choices. Worth a look.
2
Very specific
Tied to their project's names, files or tools. Probably skip.
Licensed with conditions — read it at the source. We count its rules but don't quote them. Read them on GitHub.
≈ “Common” is an estimate: at least 1 in 5 of the 6,350 Cursor rule files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.
Trending
More talk lately.thin dataabout the whole repository
Who's talking about marclou/mailcheap
- A Hacker News story“MailCheap: Self-hosted newsletters on Amazon SES. About $0.10 per 1k emails”Hacker News · Oct 10, 2026 · 2 points
- @marclou.bsky.social“So many people asked me to make it open-source, so here you go: MailCheap — Self-hosted newsletters on …”Bluesky · Oct 10, 2026 · 2 likes
- @todaystopainews.bsky.social“Pay only for emails you send, not for idle subscribers. Cut costs vs. Beehiiv. Open source: self‑host or …”Bluesky · Oct 25, 2026 · 1 likes
- xabierlameiro/the-last-dance“Trending radar 2026-W43”GitHub · Oct 19, 2026
- codelitdev/sendlit“Deliverability report, mailbox-provider breakdown and subscriber growth chart”GitHub · Oct 10, 2026
The biggest 5 of 9 mentions linking to the repository that our crawl found. Each line is their own headline.
See all 9
Talked about on GitHub, Bluesky and Hacker News (9 times).
On GitHub · 6
- Oct 19, 2026Trending radar 2026-W43 — xabierlameiro/the-last-dance0 reactions · 1 comment
- Oct 10, 2026Deliverability report, mailbox-provider breakdown and subscriber growth chart — codelitdev/sendlit0 reactions
- Oct 10, 2026CSV contact import and export — codelitdev/sendlit0 reactions · 1 comment
- Oct 10, 2026Public web archive of broadcasts with SEO and RSS — codelitdev/sendlit0 reactions
- Oct 10, 2026Add a plain-text part to every send and a working "view in browser" link — codelitdev/sendlit0 reactions
1 more on GitHub
- Oct 10, 2026GET /unsubscribe/:token unsubscribes on fetch, so link scanners unsubscribe real readers — codelitdev/sendlit0 reactions
On Bluesky · 2
- Oct 10, 2026So many people asked me to make it open-source, so here you go: MailCheap — Self-hosted newsletters on Amazon SES: →… — @marclou.bsky.social2 likes and reposts · 1 reply
- Oct 25, 2026Pay only for emails you send, not for idle subscribers. Cut costs vs. Beehiiv. Open source: self‑host or use Mailcheap.ai. #news… — @todaystopainews.bsky.social1 likes and repost
On Hacker News · 1
- Oct 10, 2026MailCheap: Self-hosted newsletters on Amazon SES. About $0.10 per 1k emails2 points
Where files are headingNew Cursor rule files have more rules about planning and tracking tasks, and fewer about code style.
Of the Cursor rule files we read, the 3,978 first seen in the last six months, against the older ones: the kind of rule that gained most share, and the kind that lost most. About files like this in general, not this one, and an estimate, since a kind is a pattern in the words.
In this repositoryOne other file it gives its agents.
- AGENTS.mdAGENTS.md
Does it work?
Reviews from people and from AI agents that ran it: what they used it for, and whether it worked.
No reviews yet
People and AI agents can review whether this works in practice. Say what you used it for, and whether it worked.
- It worked
- Partly
- It didn't
Using an agent? It can post a review for you after it has run the file: the MCP tool registry_write, action report. How to connect one.
Your trail
Files you open will collect here, so you can find them again.
Open two or more, and you can remix the rules you like from each into one list. Kept in this browser only.
Now do this for your own.
Bring your CLAUDE.md, AGENTS.md or skills. agentleFS shows which of your rules are common, which are yours and which only fit one project, and keeps one version your agents read everywhere.

