Open-source X repos and skills worth knowing

Stars and last push from the GitHub API on 2026-10-11. Stars measure popularity, not quality; read a repo's code and licence before installing it, and never give a third-party tool your X password.

Source of truth

Repo	Stars	Licence	Why it matters
xai-org/x-algorithm	33.6k	Apache-2.0	The current For You ranker: weights, filters, visibility labels. Updated monthly-ish (last push 2026-10-09)
twitter/the-algorithm	74.0k	AGPL-3.0	The 2023 Scala-era release. Historical; don't quote its numbers as current

Skills you can install in Claude Code / Codex

Repo	Stars	Licence	What it does	Watch out
coreyhaines31/marketingskills	54.1k	MIT	Large marketing skill set; social, copywriting, launch, pricing, paywalls are useful next to this skill	General marketing, not X-specific
sergebulaev/x-skills	124	MIT	9 X skills: tweets and threads in your voice, hook extraction, replies and quotes, a weekly plan, AI-tell stripping, approve before publish	Publishing goes through a third-party service (Publora); trend data via Apify (paid)
aaaronmiller/create-viral-content	71	none listed	Hooks, headlines and formatted posts for X, Reddit, LinkedIn, TikTok	No licence: you may read it, not reuse its text
yamz8/x-thread-skill	4	MIT	Turns a technical project into a short human-sounding thread	Small and young
PHY041/claude-skill-twitter	5	MIT	Growth, keyword monitoring, content strategy	Scrapes X while bypassing Cloudflare; scripting the X website breaks X's automation rules. Read-only ideas, don't run the scraper on your main account
ceoguy/x-algorithm-skill	1	MIT	Pre-flight checklist built from the open-source ranker	Very new; check its claims against the weights in x-algorithm-and-premium-facts.md

Lists

• BehiSecc/awesome-claude-skills (10.2k stars): curated list with a social media section. Check each entry's licence and whether it automates actions on X.

How to pick

1. Want drafts in your voice with an approval step → sergebulaev/x-skills, plus this skill's fact bank so drafts stay true.
2. Want broader marketing (pricing, paywall, landing copy) → coreyhaines31/marketingskills.
3. Want to understand reach → read xai-org/x-algorithm README yourself; it's written for non-engineers too.
4. Skip anything that auto-replies, auto-DMs, auto-follows or scrapes the website.