openrig-cmux

cmux is a provider for OpenRig views, the same rig terminal surface as herdr, rendering the tiles into cmux instead. It is the provider OpenRig already shipped (the existing "Launch in cmux" affordance generalizes onto rig terminal <provider>), kept working. The OpenRig-semantic half is identical to openrig-herdr: OpenRig decides which agents form a view; the provider renders the pixels. Read openrig-herdr first for the full model, this skill only calls out what differs for cmux.

Provider status, cmux is best-effort

• herdr is the default and the proof-gated provider; cmux is best-effort, it ships on the same rig terminal <provider> + web-launcher neighborhood, but a cmux miss is not a slice failure. Reach for cmux when it is specifically wanted; otherwise default to herdr (rig terminal open <view> with no --provider).
• Views are provider-agnostic: the same view + the same agents + the same semantics carry across herdr and cmux. A saved view opens in either.

The surface (same three verbs, --provider cmux)

rig terminal open <view> --provider cmux [--json]   # open a view into cmux (herdr is the no-flag default)
rig terminal views [--json]                          # the same view library, provider-agnostic
rig terminal status --provider cmux [--json]         # cmux liveness / health

<view> resolves exactly as with herdr: a rig name · pod:<rig>/<podNamespace> · mission:<id> · slice:<id> (derived live) · a saved-view name.

What carries over unchanged from openrig-herdr

All of these behave identically, see openrig-herdr for the detail: