What changed
Open WebUI 0.13.1 added Claude Code, Codex and Pi as selectable chat models, the cross-platform Tether desktop bridge, optional review-model tool approvals, cacheable tool loops and a broader terminal workspace. Same-day 0.13.2 repaired chat, comments and Markdown editing on plain-HTTP LAN deployments.
Why it matters
A self-hosted chat interface can now become an operating surface for coding agents and real desktop files rather than only a model front end. That also concentrates approval, device-session, migration and data-access boundaries in one administrator-controlled layer.
What to do
Back up the database, upgrade every instance together in staging, then test one agent chat, one denied tool call, Tether reconnect, prompt-cache reuse and a plain-HTTP LAN session before exposing a production workspace.
Caveat
The release includes undisclosed security fixes and schema changes; rolling mixed-version upgrades are explicitly unsupported. Auto approval sends tool arguments and recent messages to the configured review API, and Tether sessions can last 90 idle days unless administrators shorten them.