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LexAI — Social media posts
Ready-to-copy posts for promoting LexAI.
Website: https://lexai.juankibin.space/
Chrome Web Store: https://chromewebstore.google.com/detail/bagpcheidbkfgijnnmolnkgagibbjfnk
VS Code Marketplace: https://marketplace.visualstudio.com/items?itemName=JuanKibin.lexai-vscode
Repository: https://git.juankibin.space/kibin/LexAI
Prompt Builder — featured angle
Use these when you want Prompt Builder front and center. It works in three places: Chrome (Make Prompt), VS Code, and the CLI (lexai prompt).
LinkedIn — Prompt Builder focus
Bad prompts waste good models.
LexAI Prompt Builder turns a rough idea into a paste-ready, engineered prompt — before you send it to Claude, Cursor, ChatGPT, or any other agent.
How it works:
- Chrome — select any text → Make Prompt → copy a structured prompt for your next session
- VS Code / Cursor — select code or notes → Make Prompt with pattern, persona, and format options
- CLI —
lexai prompt "add rate limiting to the auth routes"→ engineered prompt on stdout, ready to pipe or paste
Pick a pattern (role, chain-of-thought, and more), set persona and output format, and get something you can actually hand to an AI agent.
Same BYO-key model: your API key, your provider, no LexAI servers.
Try it: https://lexai.juankibin.space/
Docs: https://lexai.juankibin.space/docs
#PromptEngineering #AI #OpenSource #DeveloperTools #BYOLLM
X / Twitter — Prompt Builder focus
Stop pasting vague prompts into Claude and Cursor.
LexAI Prompt Builder: rough idea → engineered, paste-ready prompt.
Chrome · VS Code · CLI (
lexai prompt) Your key. No subscription.
Short demo tweet
"add rate limiting to auth" →
LexAI Prompt Builder →
structured prompt you paste into Cursor ✓
Browser, editor, or terminal. BYO API key. https://lexai.juankibin.space/
Option A — Full launch post
I built LexAI because I was tired of paying for Grammarly and Copilot when I already had an LLM API key.
LexAI is an open-source writing, coding, and prompt-engineering assistant that uses your API key — no LexAI account, no servers, no subscription.
What it does:
- Prompt Builder — turn a rough idea into a paste-ready prompt (Chrome, VS Code, or CLI). Patterns, persona, and format built in.
- Chrome extension — select text on any webpage → Fix, Rephrase, Shorten, Expand, Explain, or Make Prompt
- VS Code / Cursor extension — select code, give an instruction, apply a suggestion with file context
- CLI —
lexai prompt "your idea"outputs an engineered prompt to stdout — pipe it straight into your workflow
Your key stays on your device. Text goes only to the provider you choose (OpenAI, Anthropic, Groq, or OpenRouter).
MIT licensed. Audit it, fork it, ship your own build.
Learn more: https://lexai.juankibin.space/
Chrome: https://chromewebstore.google.com/detail/bagpcheidbkfgijnnmolnkgagibbjfnk
VS Code: https://marketplace.visualstudio.com/items?itemName=JuanKibin.lexai-vscode
#OpenSource #AI #PromptEngineering #DeveloperTools #Productivity #BYOLLM
Option B — Short
Skip the second subscription — and stop writing bad prompts by hand.
LexAI = Grammarly-style writing in Chrome + Copilot-style code assist in VS Code + a Prompt Builder that engineers paste-ready prompts from a rough idea.
Your LLM API key. No LexAI servers. No fee.
Open source (MIT): https://lexai.juankibin.space/
#AI #OpenSource #PromptEngineering #BuildInPublic
X / Twitter
Launch tweet
LexAI: BYO-LLM writing, coding, and prompt engineering — no subscription, no account, no LexAI servers.
✨ Prompt Builder — rough idea → paste-ready prompt
🌐 Chrome: fix/rephrase/make prompt on any page
💻 VS Code: select code → instruct → apply
⌨️ CLI: lexai prompt "your idea"
Open source (MIT)
https://lexai.juankibin.space/
Thread opener
Tired of paying Grammarly AND Copilot — and still writing vague prompts for Claude/Cursor?
I built LexAI: your key, your provider, your device. Writing help + code assist + Prompt Builder. 🧵
(Reply with one tweet per feature — lead with Prompt Builder, then Chrome, VS Code, CLI + links)
Thread reply — Prompt Builder (tweet 2)
Feature 1: Prompt Builder
Type a rough idea → get a structured, paste-ready prompt.
Use it in Chrome (Make Prompt), VS Code, or terminal:
lexai prompt "debug flaky tests on CI"Pipe to clipboard. Paste into Cursor. Done.
Short punchy
Your API key. Your provider. No LexAI cloud.
Prompt Builder in browser, editor, and CLI. Writing help in Chrome. Code assist in VS Code.
https://lexai.juankibin.space/ · MIT
Facebook / Instagram
Meet LexAI — AI writing, coding, and prompt engineering without another monthly bill.
If you already have an OpenAI, Anthropic, Groq, or OpenRouter API key, LexAI puts it to work:
✨ Prompt Builder — rough idea → engineered, paste-ready prompt (Chrome, VS Code, or CLI)
✍️ Fix grammar and rephrase text on any website
💻 Get coding suggestions in VS Code or Cursor
🛠️ Run lexai prompt from the terminal and pipe the result anywhere
Stop guessing what to type into ChatGPT or Cursor. LexAI structures the prompt for you.
Your data stays yours — no LexAI account, no servers, no tracking.
Free & open source.
👉 https://lexai.juankibin.space/
#LexAI #AI #PromptEngineering #OpenSource #ProductivityHack
Reddit / Hacker News
Title
Show HN: LexAI – BYO-LLM writing help, code assist, and Prompt Builder (Chrome + VS Code + CLI)
Body
LexAI is an open-source toolkit for people who already have an LLM API key — an alternative to Grammarly + Copilot subscriptions, with a built-in Prompt Builder for agent workflows.
Prompt Builder (the part I use most):
- Turn a rough idea into a paste-ready, engineered prompt
- Available in Chrome (Make Prompt), VS Code, and CLI
- Patterns (role, chain-of-thought, etc.), persona, output format, and style options
- CLI example:
lexai prompt "add rate limiting to the express auth routes"→ stdout, pipe-safe
Also:
- Chrome MV3 extension: select text → Fix / Rephrase / Shorten / Expand / Explain / Make Prompt
- VS Code extension: workspace-aware Code Assist (select code, instruct, apply)
- Shared provider core: OpenAI, Anthropic, Groq, OpenRouter
No LexAI backend, account, or telemetry. Keys stay on-device (encrypted in Chrome, Secret Storage in VS Code).
Site: https://lexai.juankibin.space/
Docs: https://lexai.juankibin.space/docs
Repo: https://git.juankibin.space/kibin/LexAI
Chrome: https://chromewebstore.google.com/detail/bagpcheidbkfgijnnmolnkgagibbjfnk
VS Code: https://marketplace.visualstudio.com/items?itemName=JuanKibin.lexai-vscode
MIT licensed. Feedback and contributions welcome.
Threads / Bluesky
Built LexAI for people who already pay for an LLM API key and don't want Grammarly + Copilot subscriptions on top.
Highlight: Prompt Builder — rough idea in, engineered prompt out. Works in the browser (Make Prompt), VS Code, and terminal (lexai prompt). Paste straight into Claude or Cursor.
Also: writing help in Chrome, code assist in VS Code. Your key never hits LexAI servers.
Open source: https://lexai.juankibin.space/
Hashtag reference
| Platform | Suggested tags |
|---|---|
#OpenSource #AI #PromptEngineering #DeveloperTools #Productivity #BuildInPublic #Privacy |
|
| X | #PromptEngineering #BYOLLM #OpenSource #DevTools #AI |
#LexAI #AI #PromptEngineering #OpenSource #Tech #Productivity |
Posting tips
- Lead with Prompt Builder when posting to dev/AI communities — "rough idea → paste-ready prompt" is a clear, immediate win.
- Show a before/after — screenshot a one-line idea next to the engineered prompt LexAI outputs; that demo converts better than feature lists.
- CLI clip for dev Twitter — record
lexai prompt "..." | Set-Clipboard(or pipe to terminal) and paste into Cursor in the next frame. - Pin the website link in your bio or first comment if the platform limits link visibility.
- CTA by audience — prompt engineers → CLI + Make Prompt; developers → VS Code + repo; writers/general → Chrome Web Store.