VersionR

Developer-first prompt management for LLM applications.

VersionR gives you a dedicated place to write, version, deploy, and iterate on your LLM prompts — without touching your application code every time something needs to change.

Think of it as Postman for prompt engineering. Clean, focused, and built for developers.

The problem

Prompts in most LLM apps today are hardcoded strings:

const response = await openai.chat.completions.create({
  model: 'gpt-4o',
  messages: [{ role: 'system', content: 'You are a helpful assistant...' }],
})

This means every prompt change requires a code change, a review, and a deployment. There’s no version history, no rollback, no way to A/B test, and no visibility into what changed when your output quality shifts.

VersionR fixes this.

The core loop

Write prompt → Version it → Deploy it → See results → Iterate

Your application fetches the active prompt at runtime via the SDK. Change the prompt in the dashboard, deploy with one click — no code change required.

Key features

• Version history — every prompt save creates a new version with a diff view
• Environments — separate Dev / Staging / Production pointers
• One-click deploy & rollback — promote any version to any environment instantly
• Variable extraction — {{variable_name}} slots are auto-detected and type-checked
• A/B testing — split traffic between two prompt versions and track results
• Result logging — every SDK call can log input, output, latency, and token cost
• Playground — test any prompt version live in the dashboard

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