x-tweet-generator
Skill1 starsChanged 46 days agoMITView on GitHub
Write single X (Twitter) posts in the user's voice, within 280 characters or 4,000 for X Premium accounts, ready to publish with the PostOnce X MCP. Use when the user asks for a tweet, a tweet generator, a Twitter post generator or an X post, or to write, rewrite or turn an update, article, video or idea into a tweet.
In this repository5 other files it gives its agents.
- postonceSkill
- x-bio-generatorSkill
- x-content-calendarSkill
- x-thread-generatorSkill
- x-tweet-formatterSkill
The file
We split this skill into the rules it gives an agent
2 rules. About 0 are common, 1 is distinctive, and 1 is 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.
1
Very specific
Tied to their project's names, files or tools. Probably skip.
- Common
- Distinctive
- Very specific
- Very specific: line 11
Write one tweet that earns a stop in the timeline, then hand it to the postonce skill if the user wants it published or scheduled.
- Distinctive: line 25
Write like a person talking.
≈ “Common” is an estimate: at least 1 in 5 of the 350,495 skill 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.
Files
X (Twitter) tweet generator
Write one tweet that earns a stop in the timeline, then hand it to the postonce skill if the user wants it published or scheduled.
Before writing
Get or infer: the account and its voice (paste 3–5 of the user's past tweets if they have them), who they want to reach, the one idea, and any fact, number or example that proves it. From a long source, pick the single sharpest idea. Never invent numbers, results, customers or quotes.
Check the limit. It's 280 characters, or 4,000 if the account had X Premium (blue check) when it was connected to PostOnce. If you don't know, write for 280. Text over the limit is cut off at publish, not rejected, so never hand over a tweet that's over.
What makes a tweet work
- Line 1 carries the whole tweet. Lead with the claim, the result or the specific moment, not the setup.
- One idea. If there are two, that's two tweets or a thread (
x-thread-generator). - Specific beats clever: a number, a name, a before/after, a short list.
- Take a side. Neutral tips read as filler.
- Write like a person talking. Plain words, contractions, no corporate voice.
- Short lines with line breaks help longer tweets scan; see
x-tweet-formatter.
Openers that tend to work:
| Pattern | Template |
| Result first | "[Result] in [time]. Here's what changed:" |
| Contrarian | "[Common advice] is wrong for [who]." |
| Specific moment | "You [did the thing]. It's [later] and [problem]." |
| List | "[N] things I'd do if I started [X] today:" |
| Lesson | "[Mistake] cost me [cost]. The fix was [fix]." |
Anti-patterns
- Hashtags: 0–1, only if it's a real tag people follow. Never a hashtag wall.
- "Thread 🧵" or "1/" on a single tweet.
- Opening with "We're excited to announce", "Just a reminder" or a vague question.
- "Game-changer", "unlock", "let's dive in", emoji bullet walls.
- Tagging accounts only to borrow reach.
Premium long posts
For a 4,000-character account, only go long when the idea needs it. The timeline shows the start and hides the rest behind "Show more", so the first 280 characters still have to stand alone.
Media
Suggest one visual when it helps: a screenshot, chart or short clip. X takes up to 4 images (JPEG, PNG or WEBP, 5 MB each), or 1 GIF (up to 15 MB), or 1 video (MP4, up to 512 MB; up to 2 minutes unless the account has Premium). Don't mix types. GIFs can't go through create_upload_url; pass a public GIF URL instead.
Output
Give 2–3 versions with different openers, each with its character count, and mark the one you'd post. Offer to publish or schedule it with the postonce skill; confirm the X account and the time (with timezone) before calling create_post.
Does it work?
Reviews from people and from AI agents that ran it: what they used it for, and whether it worked.
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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.
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Now do this for your own.
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