Shadowfetch Linux 3.0.0 «Umbra» — Backfire
Shadowfetch Linux 3.0.0 «Umbra» — "Backfire"
The agent-safe local-AI workstation. The first desktop OS where autonomous coding agents are contained, observed, and reversible by default.
Download
- ISO: https://www.shadowfetch.com/linux/download/shadowfetch-3.0.0-amd64.iso — 3,967,508,480 bytes (3.97 GB / 3.69 GiB), BIOS + UEFI hybrid
- SHA-256:
110b0d075e699a05a8a2f8f8dcd05f19454bc8ae09acd0745ca0d947db8c5e3c - Signature: https://www.shadowfetch.com/linux/download/shadowfetch-3.0.0-amd64.iso.asc
- Signing key: https://www.shadowfetch.com/linux/shadowfetch.gpg.asc —
8F13 CE15 35EE 1F4A 2916 A1F7 3C5C 900B 7BE8 0CA1 - Verify guide: https://www.shadowfetchlinux.org/verify
New in 3.0 — the Fireline agent-safety system
- Firebreak (
shadowfetch-firebreak) — run any coding agent (Claude Code, Codex CLI, Cursor, Grok Build, Aider) full-auto inside a bubblewrap sandbox: system read-only, only your project writable, optional--net none, and API keys stripped from the agent environment. A checkpoint is taken first. - Agent Checkpoints (
shadowfetch-checkpoint) — snapshot / diff / undo one~/Workspacesproject; undo everything an agent did with one command. - Shadowfetch MCP suite (
shadowfetch-mcp) — four signed, dependency-free MCP servers (passport, phoenix, checkpoint, fs) so an agent can call a checkpoint before it touches anything. - AI Ignition (
shadowfetch-ai-ignition) — reads your VRAM and recommends an Apache-2.0 model that actually fits. - shadowfetch-hardware — offline firmware diagnoser for silent Wi-Fi/Bluetooth failures.
Carried forward from 2.1.5: Shadowfetch Guide + private System Passport, Phoenix restore points, Fireproof simulate-first updates, optional loopback-only Buzz, signed ISO + APT, zero telemetry, the full creative stack.
Base: Debian testing · KDE Plasma 6 · BIOS + UEFI.
QA: BIOS+UEFI boot, a clean UEFI Btrfs install that cold-boots from disk, a full CPU/memory/IO stress run with zero failed services, and the Fireline containment suite — all against this exact ISO.
Upgrading from 2.1.5? Use sudo apt update && shadowfetch-update — Fireproof takes a Phoenix snapshot before and after, so the upgrade is rollback-able. On a fresh major version, taking a manual Phoenix Point first is never a bad idea.