Promptles is a scenario-based game for GTM engineers, PMs, designers, and enthusiasts shipping with AI agents — anyone who prompts Claude Code, Cursor, Replit Agents, or similar tools without a traditional software engineering background. You're handed real engineering tickets — debugging stack traces, refactoring across files, designing auth flows — and write the prompt you'd actually send. Each prompt is graded by Claude on the criteria a senior engineer would care about, and the expert prompt sits next to yours so you can read the gap.

Does Promptles use Claude?

Yes. Every prompt you write is graded by Claude Haiku 4.5, against a mix of deterministic pattern checks and AI-evaluated criteria. The Anthropic API is called server-side; players never need their own API key.

Do I need an Anthropic API key?

No. Promptles handles all AI calls server-side. Sign in once with your email and start playing — there's no key to paste, no provider to configure.

Is there a free tier?

Yes. The free tier includes the foundational scenarios, today's daily challenge, and pattern-based grading. Paid tiers (Solo, Lifetime, Team) add full AI grading, every scenario, and the daily archive.

How is Promptles different from other prompt engineering tutorials?

Most prompting tutorials teach you to write a single perfect prompt. Promptles grades multi-turn conversations: you write a prompt, see what Claude actually replies, then write the follow-up that fixes what's still wrong. The whole chain is graded, because that's what real software engineering work looks like.

Is Promptles useful for GTM engineers?

Yes — GTM engineers are a core audience. Building sales, marketing, and RevOps automation, internal tools, integrations, and AI agents means writing a lot of prompts to Claude Code, Cursor, Replit Agents, and similar tools. Promptles teaches the prompting rigor that gets reliable output the first time, so the integrations and agents you ship don't break the next morning. The vocabulary deck includes a dedicated GTM & Business Tools section covering the SaaS platforms, data models, and business concepts you'll be automating.

Can my team use Promptles?

Yes. The Team plan adds per-seat AI quotas and lets admins author custom scenarios for the team's codebase using AI assistance. Each member keeps their own progress and playbook; team-authored content shows up alongside the core library.

Clarity

Pick the Right Tool

Match the tool to the job: Figma, Stitch, or Penpot.

Figma's MCP is strongest when you already have a design and a component library. Stitch shines for generating screens from a description. Penpot fits open-source, self-hosted teams and emits CSS-native output. Match the tool to the job instead of forcing every task through the one server you happen to have connected.

Where you'll practice this

2 Promptles scenarios teach this principle directly. Each one drops you into a real engineering ticket and asks you to write the prompt you'd send to Claude Code.

Open-Source? Reach for Penpot
This client is fully open-source and self-hosts everything — a hosted Figma dependency is a non-starter for the project. You still need design-to-code. Penpot fits: it's open-source, self-hostable, and its MCP returns CSS-native values (real flex, gap, radius) instead of…
Pick the Right Tool
Three tasks land on the same morning. (A) Implement an existing, polished Figma design that uses your linked component library. (B) Explore a brand-new feature that has no designs at all. (C) Build for a client whose stack must stay fully open-source. You have Figma, Stitch, and…

Pick the Right Tool

Where you'll practice this

Open-Source? Reach for Penpot

Pick the Right Tool

Other principles in Clarity

Be Specific

Describe Expected Behavior

Describe the Visual Target

Describe What, Not How

Invoke the Right Skill

Master the Art