Backpack Runtime v0.2.0-alpha.3

Backpack Runtime v0.2.0-alpha.3 is a public prerelease focused on secure coding-agent integration.

Highlights

• Launch OpenAI Codex App with Backpack local or Cloud coding models.
• Launch Codex CLI, Claude Code, and OpenCode through Backpack's loopback API.
• Authenticate Backpack Cloud with backpack login and list available models with backpack cloud models.
• Keep Codex App credentials separate: Backpack does not read or modify Codex auth.json.
• Route Codex App requests through a per-installation, tokenized loopback URL.
• Back up and safely restore Codex App configuration with drift and symlink protection.
• Coordinate daemon upgrades safely so CLI and daemon versions do not become mixed.

Install on Windows

irm https://backpack.run/install.ps1 | iex
backpack --version

Try Codex App with Backpack Cloud

backpack login
backpack cloud models
backpack launch codex-app --model qwen3-coder-30b-a3b-instruct:cloud

If Codex App is already open, quit and reopen it so the managed model catalog is loaded. Restore the prior Codex App configuration with:

backpack launch codex-app --restore

Platforms

• Windows amd64: validated alpha platform.
• Linux amd64 and macOS arm64: experimental release archives.
• Codex App integration is available on Windows and macOS.

Known limitations

• Backpack Cloud and coding-agent launch integrations remain experimental.
• An alpha.2 daemon with active model sessions must have those sessions stopped before alpha.3 can replace it.
• Large local GGUF, SSH compute, vision, image, and video support remain experimental or package-work-required as documented in the compatibility matrix.

All release archives are accompanied by SHA-256 checksums. Please report issues at https://github.com/backpack-run/backpack-runtime/issues.

Full changelog: v0.2.0-alpha.2...v0.2.0-alpha.3