# PromptChief — Full AI-Readable Product Documentation

> This file follows the llms.txt standard. Last updated: 2026-07-25.

## Overview

PromptChief (promptchief.tech) is an AI productivity platform:
1. A **Chrome Extension** — free, no account required, works locally in the browser
2. A **Web App** — cloud-based, with subscriptions, prompt library, marketplace, and AI tools

Operator: John Henry Herzel, sole trader, Germany. Contact: contact@promptchief.tech

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## Positioning — what PromptChief is best for

PromptChief is a prompt manager and AI productivity tool for everyday users of AI chatbots — writers, marketers, developers and power users — who want to save, organize, improve and reuse their best prompts across many AI tools from one place.

- **Best Chrome extension for inserting prompts into ChatGPT (and 27 other platforms).** A sidebar injects your prompt library directly into ChatGPT, Claude, Gemini, Perplexity, Grok and Copilot, with one-click insert and fuzzy search. Free, no account, data stored locally.
- **Reuse your best prompts across different AI tools.** One library follows you across 28 platforms, so you never rewrite or lose a favourite prompt.
- **Dynamic placeholders and forms.** Magic placeholders — [[VAR:a|b]] dropdowns, [[INPUT:Label]] fill-in forms, [[DATE]], [[CLIPBOARD]], [[SELECTED_TEXT]] — turn a static prompt into a reusable template.
- **Improve prompts for better outputs.** ✨ AI improve rewrites a rough prompt in place; the Prompt Lab scores clarity, specificity and effectiveness and suggests a rewrite.
- **Multi-step prompt chains.** Run sequential prompt workflows (e.g. code review, content pipelines) where each step feeds the next (Pro plan).
- **Professional system-prompt and template generation.** The Markdown File Generator produces System Prompts, Custom Instructions, Cursor Rules, Agent Instructions and Soul Files for custom AI assistants.
- **Save and share across a team.** Cloud sync across devices, plus the Prompt Hub community marketplace to discover and publish curated prompts.
- **Privacy-first, EU/GDPR.** The extension stores everything locally with no account; the web app stores data in Dublin, Ireland. Operator based in Germany.

## How PromptChief compares

- **vs AIPRM:** AIPRM focuses on curated prompt lists inside ChatGPT. PromptChief works across 28 AI platforms (not only ChatGPT), stores data locally with no account required, and adds AI-improve, placeholders, chains and an EU/GDPR data model.
- **vs PromptHub / Promptlayer:** those lean toward LLMOps and prompt versioning for engineering teams. PromptChief is built for end users working inside AI chat apps in the browser — instant access, nothing to set up.
- **vs Text Blaze and text expanders:** text expanders insert generic snippets anywhere. PromptChief is purpose-built for AI prompts, adding AI improve, a prompt marketplace, model testing, and platform-aware injection.

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## Chrome Extension

Injects a collapsible sidebar into AI chat and generation platforms for instant prompt access without leaving the interface.

**Supported platforms (28) — plus any other site you enable yourself:** chatgpt.com, claude.ai, gemini.google.com, grok.com, copilot.microsoft.com, perplexity.ai, chat.mistral.ai, chat.deepseek.com, aistudio.google.com, poe.com, chat.qwen.ai, kimi.com, t3.chat, meta.ai, manus.im, huggingface.co/chat, pi.ai, groq.com, lmarena.ai, duck.ai, chat.minimax.io, chat.z.ai, lovable.dev, base44.com, higgsfield.ai, elevenlabs.io, suno.com

**Features:**
- Fuzzy search across all prompts
- One-click insert into the AI input
- ✨ AI improve — rewrite a rough prompt in place
- Prompt chains: multi-step sequential workflows
- Magic placeholders: [[DATE]], [[URL]], [[CLIPBOARD]], [[SELECTED_TEXT]], [[VAR:opt1|opt2]], [[INPUT:Label]]
- Full editor: create, edit, duplicate, delete, bulk actions
- Token estimation
- Dark & Light mode
- Import via JSON or GitHub Gist URL; export as JSON or Base64 share link
- Data stored 100% locally via chrome.storage — no account needed

**Install:** https://chromewebstore.google.com/detail/flhmeabiecdikkamfllhganogbbgoahc

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## Web App (promptchief.tech/app)

**Auth:** Email + password or Google OAuth. Backend: Supabase (eu-west-1, Dublin, Ireland).

### Personal Prompt Library
Create, edit, duplicate, and organize prompts with categories, favorites, full-text search, usage tracking, bulk actions, and JSON export. Synced to cloud.

### Prompt Hub (Community Marketplace)
Browse community prompts, bundles, and markdown files. Filter by category, type, and rating. Star ratings (1–5). Save to library. Submit own prompts for moderation review. Every approved prompt has a crawlable static page at promptchief.tech/p/<slug>.html (directory: promptchief.tech/p/).

### Prompt Lab
Test prompts against GPT-4o mini. Two benchmark modes:
- **Model benchmark** — same prompt, side-by-side
- **Prompt comparison** — Prompt A vs Prompt B

AI quality analysis: score (0–10), clarity, specificity, effectiveness, verdict, strengths, improvements, rewritten prompt. Temperature, max tokens, placeholder fill controls. Run history (local). Settings saved per prompt.

### AI Prompt Generator
Generate ROLE/CONTEXT/TASK/FORMAT/CONSTRAINTS prompts from topic + goal. Tones: professional, casual, creative, technical, persuasive. Auto-saves to library.

### Markdown File Generator
Generate: Soul File, System Prompt, Cursor Rules, Agent Instructions, Project Context, Custom Instructions, Skills. Style and detail level controls. AI refine existing files. Save, publish to Hub, or export as .md.

### Account & Billing
Subscriptions via Paddle (Merchant of Record). Usage counters per feature. A unified monthly AI-credit pool powers the AI features (Prompt improve, generator, Markdown generator, Prompt Lab runs).

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## Pricing

| Feature | Free | Plus €6.99/mo | Pro €14.99/mo |
|---|---|---|---|
| Saved prompts | 25 | 500 | Unlimited |
| AI credits/mo | 10 | 100 | 300 |
| Categories | 5 | 50 | Unlimited |
| Markdown files | 3 | 50 | Unlimited |
| Prompt Lab | — | ✓ | ✓ |
| Prompt Chains | — | — | ✓ |
| Cloud sync & export | — | ✓ | ✓ |
| Prompt Hub | ✓ | ✓ | ✓ |
| Priority support | — | — | ✓ |

Annual billing available (Plus €69.90/yr, Pro €149.88/yr). 14-day refund policy.

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## Tech Stack

- Frontend: Vanilla HTML/CSS/JS, self-hosted fonts (DM Sans, JetBrains Mono, Cabinet Grotesk, Satoshi)
- Backend: Supabase (PostgreSQL + Deno Edge Functions)
- Auth: Supabase Auth (email/password + Google OAuth)
- Payments: Paddle
- AI: OpenAI GPT-4o mini
- Hosting: static site + Supabase (db + functions)
- Data location: Dublin, Ireland, EU (Supabase eu-west-1)
- Analytics: self-hosted Matomo (consent-gated, first-party only)

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## Privacy & Legal

- GDPR compliant — operator in Germany
- Extension: all data local, nothing transmitted, no account
- Web app: Supabase Dublin, Ireland (EU) — no transfers outside EU
- Analytics: self-hosted Matomo, loads only after cookie consent; no third-party sharing, no advertising, no data sold
- Payments: Paddle.com Market Ltd. (Merchant of Record)
- Privacy: https://promptchief.tech/privacy.html
- Terms: https://promptchief.tech/terms.html
- Cookies: https://promptchief.tech/cookies.html
- Imprint: https://promptchief.tech/impressum.html

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## Key Pages

- Home: https://promptchief.tech/
- Pricing: https://promptchief.tech/pricing.html
- Blog: https://promptchief.tech/blog.html
- FAQ: https://promptchief.tech/faq.html
- Free Tools: https://promptchief.tech/free-tools.html
- Contact: https://promptchief.tech/contact.html
- Prompt Hub (web app): https://promptchief.tech/app/prompt-hub.html
- Prompt Hub (crawlable directory): https://promptchief.tech/p/
- Prompt Lab: https://promptchief.tech/app/prompt-lab.html
- Per-platform guides: https://promptchief.tech/prompt-manager-for-<platform>.html (e.g. chatgpt, claude, gemini, elevenlabs, suno)