Your Prompts.
Version Controlled.
Manage prompts and spec documents as markdown in your own GitHub repo. Every save is a commit, history is the repo's log, and review happens through pull requests.
Write
Prompts and specs as plain markdown
Commit
Every save lands in your repo's history
Review
Changes ship through pull requests
3
Platforms
Any
AI Provider
100%
Your Repo
Prompts Deserve Better Than a Notes App
Your prompts are production assets. Most teams treat them like scratch paper.
Scattered Everywhere
Prompts live in Notion pages, text files, chat history, and someone’s clipboard. Nobody knows where the real one is.
No History
Which version of the prompt shipped last Tuesday? Without version control, nobody can say — or roll it back.
No Review
Prompt changes land silently. A one-word edit can change behavior in production with no second pair of eyes.
Locked to One Provider
Most prompt tooling is welded to a single AI vendor. Switch providers and your workflow goes with it.
Engineer Prompts, Don't Just Store Them
Everything you already trust about git, applied to your prompt library.
Your Repo Is the Database
Files are markdown, every save is a commit, and history is the repo’s log. No proprietary format, no export button needed — it’s your GitHub repository.
Review Through Pull Requests
Prompt and spec changes go through the same PR review flow as code. Diffs, comments, approvals — the workflow your team already knows.
Multi-Provider Agent Enhancement
Refine prompts with Anthropic, OpenAI, or any OpenAI-compatible endpoint. Specter works with your provider, not the other way around.
Prompt Test Runner
Run prompts against real inputs and compare results before you merge. Turn the library into a place to engineer prompts, not just file them.
From Scratch Paper to Source of Truth
Three steps to a prompt library you can actually trust.
Connect a Repo
Sign in to GitHub and pick or create a repository. That repo is your library — Specter never holds your prompts hostage.
Write & Iterate
Draft prompts and specs in markdown. Enhance them with the AI provider of your choice, and commit every meaningful revision.
Test & Review
Run prompts through the test runner, compare outputs, and merge improvements through pull requests.
Native on Every Desk
One library, three native apps. No browser tab pretending to be software.
macOS
Native desktop app, signed and notarized
Windows
Native desktop app, portable or installer
iPad
Native SwiftUI app for the same library
Desktop builds ship self-contained — no .NET runtime to install. Download, open, sign in to GitHub, done.
Downloads coming soon
Give Your Prompts a Home
Specter is coming soon — it's getting hammered on daily, and public builds are next.
Built by Andrew, a solo developer, to run his own prompt library. Now it can run yours.