Your best prompts disappear every day
You send dozens of prompts to AI tools. The good ones vanish when you close the terminal. Prompt Cellar captures them all—automatically, encrypted, searchable.
You've been here before
The debug prompt that worked perfectly
Last week you wrote a prompt that got Claude to nail a tricky race condition on the first try. Today you hit a similar bug. You can't find the prompt. Terminal history scrolled past it. You spend 15 minutes rewriting something half as good.
The system prompt you forgot to save
You iterated on a CLAUDE.md system prompt for two hours. Got the tone and constraints exactly right. Then you switched branches and it got overwritten. No backup. Start over.
The teammate who asked "what prompt did you use?"
Your coworker saw your results and wants the prompt. You dig through three terminal tabs, a note in Obsidian, and a Slack message to yourself. You find a fragment. It's not the right version.
20 minutes rewriting from memory
You know you had a prompt that generated clean migration scripts. You remember roughly what it said. You rewrite it. The output is worse. You tweak it four times. You just burned half an hour recreating something you already had.
What prompt version control actually looks like
Not a notebook. Not a spreadsheet. A tool built for how you already work.
Auto-capture
A CLI hook runs in the background. Every prompt you send to Claude Code, Codex, or Gemini gets captured before it leaves your machine. You change nothing about how you work.
Session timeline
Your prompts are grouped by coding session and project directory. Open last Thursday's debugging session. See every prompt in order. Context preserved.
Encrypted search
Search across every prompt you've ever written. Type race condition mutex and find that debug prompt from three weeks ago in two seconds.
One-click reuse
Found what you need? Copy it to your clipboard with one click. Paste it into your next session. No friction.
Built for engineers who live in the terminal
If you use AI coding tools daily, you're generating prompts worth keeping.
Claude Code users
You run claude dozens of times a day. Each session is a mix of instructions, debugging, and code generation. Prompt Cellar captures the full conversation thread.
Codex CLI users
You pipe files through Codex for refactoring, test generation, and code review. Those prompts encode your engineering standards. Keep them.
Gemini CLI users
You use Gemini for research, architecture decisions, and documentation. The prompts that produce good output are worth saving alongside the output itself.
Multi-tool workflows
You switch between AI tools depending on the task. Prompt Cellar gives you one timeline across all of them. Search once, find everything.
Your prompts, your keys, your data
Prompt Cellar uses zero-knowledge encryption. Here's what that means in practice.
Client-side key derivation
Your encryption key is derived from your password in your browser using PBKDF2. The key never leaves your machine. We never see it.
AES-256-GCM encryption
Every prompt is encrypted with AES-256-GCM before it's sent to our servers. Each prompt gets a unique initialization vector. The server stores encrypted blobs. That's it.
We can't read your prompts
This isn't a policy. It's math. Without your key, the data on our servers is indistinguishable from random noise. A database breach reveals nothing useful.
Search stays private too
The search index is built and encrypted client-side. Your search queries decrypt locally. We see that you searched, not what you searched for.
Stop losing the prompts that work
Setup takes one command. Your first 100 prompts are free. No credit card.
Get Started