Name: Stegstr
Logo: https://stegstr.com/images/logo.png
Description: Stegstr is a steganographic social networking app. It hides Nostr messages inside images using LSB/DWT steganography. Users can embed their feed (posts, DMs) into PNG images and share them anywhere; recipients use Detect to load the hidden content. No registration required. Works offline. Available for macOS, Windows, Linux, and Android.
Communication: Web
Author: https://github.com/brunkstr/Stegstr

# Capabilities (for AI agents and automation)
Capability-Decode: Decode Stegstr payload from a PNG file. Input: file path to PNG. Output: raw payload bytes (UTF-8 JSON bundle when decrypted, or base64 if binary). Use CLI: stegstr decode <path> or desktop app Detect.
Capability-Embed: Embed a payload into a cover PNG. Input: cover image path, output path, payload (UTF-8 JSON or base64). Output: path to written PNG. Use CLI: stegstr embed <cover.png> -o <out.png> --payload <json_or_path> or desktop app Embed.

# Formats
Format-Image: PNG (lossless required; JPEG/lossy will corrupt hidden data)
Payload-Format: Raw layer: magic STEGSTR (7 bytes) + 4-byte big-endian length + payload. Decrypted payload: JSON bundle { "version": 1, "events": [ Nostr events ] }. See Wiki How It Works.
Schema-Bundle: https://github.com/brunkstr/Stegstr/blob/main/schema/bundle.schema.json

# Programmatic access
CLI: Build from repo with cargo build --bin stegstr-cli. Commands: decode <image.png>, embed <cover.png> -o <out.png> --payload <string|@file>. For-Agents: https://stegstr.com/wiki/for-agents.html

# Download URLs (one-click, direct)
Download-macOS: https://github.com/brunkstr/Stegstr/releases/latest/download/Stegstr-macOS.dmg
Download-Windows: https://github.com/brunkstr/Stegstr/releases/latest/download/Stegstr-Windows.exe
Download-Linux-deb: https://github.com/brunkstr/Stegstr/releases/latest/download/Stegstr-Linux.deb
Download-Linux-AppImage: https://github.com/brunkstr/Stegstr/releases/latest/download/Stegstr-Linux.AppImage

# Key pages
Getting-Started: https://stegstr.com/getting-started.html
Wiki: https://stegstr.com/wiki/index.html
How-It-Works: https://stegstr.com/wiki/how-it-works.html
FAQ: https://stegstr.com/wiki/faq.html
For-Agents: https://stegstr.com/wiki/for-agents.html
GitHub: https://github.com/brunkstr/Stegstr