Deploy Your Second Brain in Seconds
Choose the experience tailored to your workflow. Start immediately with the zero-cloud Local PWA running 100% on your device, or deploy the self-hosted sovereign Core engine with physical file storage and AI agent memory.
Sphene Local (Standalone PWA)
Open immediately in any desktop or mobile browser. Runs 100% locally in your device's IndexedDB storage. Your documents never touch our servers — zero server configuration, zero cloud tracking, and complete privacy.
Sphene Core (Server)
The compiled Go daemon with real plaintext Markdown files on disk, Model Context Protocol (MCP) for autonomous AI agents, and embedded Tailscale WireGuard mesh.
curl -fsSL https://raw.githubusercontent.com/Sphene-app/scripts/main/install.sh | bash
.md files stored on your diskIncluded Out of the Box with Every Installation
1. Sovereign Knowledge Substrate
All your notes live as standard plaintext Markdown files on your own disk. Operates at <25MB RAM locally (<50MB with embedded WireGuard mesh relay) with zero cloud lock-in.
2. Interactive Visual Dashboard
Open http://localhost:8743 in any browser or install it as a borderless desktop/mobile app (PWA). Includes interactive 3D knowledge graph, distraction-free markdown reader, and vault privacy boundaries.
3. Autonomous AI Agent Hub
Connect Claude Desktop, Cursor, or Hermes Agent via native Model Context Protocol (MCP) and fast CLI tools. Features the Differential Timeline ("Human Veto") so agents never silently overwrite your work.
🔐 Zero-Dependency Offline & Migration Toolkit
Because Sphene is 100% sovereign, your data never requires the app or daemon to be accessed. The installer, emergency decryptor, and migration engines are open-source and hosted in the public repository Sphene-app/scripts:
🔍 Inspect the AES-256-GCM Decryption Command & Algorithm (Zero Lock-in Proof)
Sphene uses standard, authenticated AES-256-GCM primitives with no black-box crypto. The cipher algorithm and key derivation parameters are 100% public, verifiable, and can be inspected in the Sphene-app/scripts repository. You can decrypt any encrypted note on any Mac or Linux machine without having Sphene installed:
# Standalone zero-lock-in in-place vault decryption:
curl -fsSL https://raw.githubusercontent.com/Sphene-app/scripts/main/decrypt.sh | bash
decrypt.sh is a lightweight, zero-dependency open-source script that iterates through your vault directory, asks for your username and password, and authenticates and decrypts all notes back to open Markdown in-place. Inspect the full code anytime at Sphene-app/scripts/decrypt_vault.py.
🛡️ Cryptographic Verification & Consistency Hashes (SHA-256)
Every release artifact is compiled with -trimpath -ldflags="-s -w" and signed with immutable SHA-256 checksums to guarantee zero tampering and safe delivery.
curl -fsSL https://sphene.app/SHA256SUMS | sha256sum -c --ignore-missing
| Artifact | Platform / Target | Format | SHA-256 Consistency Hash |
|---|---|---|---|
sphene-linux-amd64 |
Linux (x86_64 / amd64) | Stripped Static ELF | e4084ff4e5812979...3493c942 |
sphene-linux-arm64 |
Linux (ARM64 / aarch64) | Stripped Static ELF | f4139bf084335df4...377c84cc |
sphene-darwin-arm64 |
macOS Apple Silicon (M1-M4) | Mach-O 64-bit arm64 | 4513f5ec41f5afcc...22ca9c44 |
sphene-darwin-amd64 |
macOS Intel (x86_64) | Mach-O 64-bit x86_64 | a1b4932ee218cceb...7b857e57 |
sphene-windows-amd64.exe |
Windows (x86_64) | PE32+ Console Executable | e7b49f16c9073293...2ab2c791 |
sphene-image.tar.gz |
Docker Container (v2.2.26) | OCI Archive Image | e931f56d09263616...6efab053 |
hermes-skill.tar.gz |
Hermes Agent Skill | Gzipped Tar Archive | 5957146ffb968fa1...8ae4862c |
install.sh |
Universal Installer | POSIX Bash Script | a621dc66808014b9...33b16f2e |