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All free AI prompt & agent templates

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Coding & Cursor Rules

One Rules File for Claude Code, Codex, Cursor & Gemini: Stop CLAUDE.md, AGENTS.md, GEMINI.md, and Cursor rules drifting apart: one AGENTS.md source of truth plus tiny pointer files for every agent.
Cursor Rules Not Working? .mdc Fix Checklist + Starter Rules: Why Cursor ignores your rules (plain .md files, missing frontmatter, wrong globs) plus a correct .mdc starter pack you can copy into .cursor/rules/.
AGENTS.md Starter Template for Claude Code, Codex & Cursor: A drop-in AGENTS.md (or CLAUDE.md) that tells coding agents how your repo works, how to verify changes, and what never to touch.
Cursor Rules for Next.js + TypeScript: A .cursorrules file that keeps Cursor writing clean, typed Next.js App Router code.
Cursor Rules for Python Projects: Rules that make AI editors write typed, tested, modern Python.
Vibe Coding Project Kickoff Prompt: Turn a fuzzy app idea into a scoped plan before the AI writes any code.
Debug Any Error Prompt: Paste an error and get the root cause, a fix, and a way to prevent it.
AI Code Review Prompt: Get a senior-engineer style review of a diff or file.
Generate Unit Tests Prompt: Get thorough unit tests, including edge cases, for any function.
Explain This Codebase Prompt: Onboard yourself to an unfamiliar repo fast.
Safe Refactor Prompt: Refactor messy code without changing behavior.

System Prompt Regression Test Set (Evals for Prompts & Skills): Edit your system prompt, CLAUDE.md, or agent skill without fear: build a small eval set, rerun it after every change, and catch regressions before users do.
Strict JSON-Only Output Prompt (No Prose, No Code Fences): Make ChatGPT, Claude, Grok, or any agent return valid JSON that matches your schema, with no chatty preamble or markdown fences.
General AI Agent System Prompt: A solid base system prompt for any tool-using AI agent.
Web Research Agent Prompt: An agent prompt that researches a topic and cites sources.
Customer Support Agent Prompt: A friendly, safe support bot that knows when to hand off to a human.
Discord Community Bot Prompt: Personality and rules for an AI bot in a gaming or dev Discord.
Email Triage Agent Prompt: Sort an inbox into action buckets and draft replies.
Multi-Agent Crew Setup (Planner/Worker/Critic): A three-role agent pattern that produces better results than one agent.
Market Research Agent Prompt (Not Financial Advice): An agent that summarizes a stock or crypto with balanced bull/bear cases.
Personal Assistant Agent Prompt: A calendar-and-todo agent that keeps your day organized.

One-Prompt Browser Game Builder: Vibe code a complete, playable HTML5 game from a single prompt: one file, no build step, runs in any browser.
One-Page Game Design Doc Prompt: Turn a game idea into a tight one-page design doc.
NPC Dialogue & Personality Prompt: Generate an NPC with a consistent voice and branching dialogue.
Game Build / Loadout Optimizer Prompt: Get an optimized build for any game, explained.
Stream Title & Thumbnail Ideas Prompt: Generate clickable Twitch/YouTube titles and thumbnail concepts.
Patch Notes Summarizer Prompt: Turn long patch notes into what actually matters for you.
Game Mod Idea & Plan Prompt: Brainstorm a mod and get a step-by-step plan to build it.

X (Twitter) Thread Writer Prompt: Turn an idea into a punchy, high-engagement X thread.
YouTube Video Script Prompt: Write a retention-focused YouTube script with a strong hook.
TikTok / Shorts / Reels Script Prompt: 30-60 second vertical video scripts that hold attention.
Newsletter Issue Writer Prompt: Draft a skimmable weekly newsletter from your notes.
Repurpose One Post Into 10 Prompt: Turn one blog post or video into a week of content.
SEO Blog Post Outline Prompt: Get a search- and chatbot-friendly article outline.

Landing Page Copy Prompt: Write landing page copy that converts, section by section.
Cold Email / Sponsor Pitch Prompt: Short, personal outreach emails that actually get replies.
Business Idea Validator Prompt: Pressure-test a startup or side-project idea in 10 minutes.
Meeting Notes to Action Items Prompt: Turn a messy transcript into decisions and tasks.
Pricing Strategy Prompt: Figure out what to charge for a digital product or SaaS.

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