Summary

This repository offers a distilled playbook of 101 principles for designing SaaS and startup products focused on conversion, retention, and monetization. Packaged as an Agent Skill for AI assistants, it leverages behavioral science and the "Revenue-Centric Design" (RCD) philosophy to help users build products that serve both user value and business revenue.

How It Works

The project distills Richard's (@richardrx) X/Twitter posts into a structured format (Principle → Apply when → The move → Evidence → Visual → Source) for AI agents. This methodology, termed Revenue-Centric Design (RCD), advocates for designing products that simultaneously deliver user value and drive business revenue. The structured output enables AI agents to quickly identify specific design levers, actionable steps, and supporting evidence for optimizing product performance.

Quick Start & Requirements

• Install: npx skills add heliocosta-dev/revenue-centric-design
• Manual Install: git clone https://github.com/heliocosta-dev/revenue-centric-design.git ~/.claude/skills/revenue-centric-design
• Prerequisites: Requires an Agent Skills-compatible AI agent (e.g., Claude Code, Cursor, Copilot, Gemini). No specific hardware or complex software dependencies are listed beyond the agent framework.

Highlighted Details

• Contains 101 principles curated from posts between January 14 and July 1, 2026.
• Organized into 10 themes, including Conversion & Landing Pages (16 principles), Onboarding & Activation (19 principles), Pricing & Monetization (11 principles), and Churn & Retention (9 principles).
• Each principle is presented in a consistent format: Principle, Application conditions, Actionable move, Evidence, Visual aid reference, and Source link.
• Covers concepts like the decoy effect, Swiss Knife Index, loss aversion, peak-end rule, and JTBD.

Maintenance & Community

The content was last updated on July 1, 2026. Instructions are provided for updating the skill with newer posts by manually distilling and integrating them. Attribution is given to the original author, Richard (@richardrx). No specific community channels (e.g., Discord, Slack) are listed.

Licensing & Compatibility

The repository is source-available under custom terms requiring attribution. A significant restriction prohibits its use for betting, casino, or gambling-related products. Commercial use is permissible under these terms.

Limitations & Caveats

The skill's knowledge base is a snapshot up to July 1, 2026, and does not include subsequent posts. Its use is strictly forbidden for any gambling, betting, or casino-related applications.