I'm a 3rd year CS student who built a Chrome extension in a week — here's what I learned trying to get my first real users

A few weeks ago I was complaining about rewriting the same
prompts every time I opened Claude. My friend told me to just
save them in Notion. I did. Then I'd forget to open Notion.
Then I'd rewrite the prompt anyway.

So I built something about it.

PromptVault is a Chrome extension + web app that saves your
prompts and injects them directly into Claude or ChatGPT with
one click. You click a prompt, it appears in the text box.
No copy pasting, no tab switching.

I'm not a seasoned developer. I'm a 3rd year CS student who
used Claude Code to help build it. But I made every architecture
decision, debugged every broken injection, and shipped something
that actually works.

Here's what the last week looked like trying to get users:

• Reddit kept removing my posts for being a new account
• Twitter got zero traction because I have zero followers
• ChatGPT subreddit blocked me for low comment karma
• Indie Hackers told me to contribute before posting (hence this post)

Honestly it's been humbling. Building the thing was the easy part.

What I have so far:

• Working Chrome extension with prompt injection on Claude and ChatGPT
• Clean web app with search, categories, favorites, templates
• Open source on GitHub
• Zero users outside of myself

I'm not trying to sell anything. I genuinely want to know —
for those of you who got your first 10 users, what actually worked?
Reddit? Direct outreach? Just tweeting into the void until something hit?

GitHub: https://github.com/siddharthrajendran2-cmd/promptvault

Any feedback on the product itself is also welcome.
What would make you actually install this?