Cos 1.0.1

Cos 1.0.1 adds a browser you can watch and tightens the native agent workflow.

Highlights

Built-in BetterWright 1.6.3 agentic browser with a pinned portable Node runtime.
Native right-side Browser inspector, opened from the task header or with Shift–Command–B.
Loopback-only interactive live view attached to the exact task session used by Cos browser tools, with tab switching and a native close-tab action.
One-time managed browser installation; no Chromium or BetterWright process is kept alive at app idle.
Ordered steering that interrupts the active provider turn and continues inside the same Cos harness run.
Model-selectable, effort-aware subagents that still use the provider-neutral Cos harness.
Provider marks in the model picker, a full reasoning range for GPT-5.6 Luna, and a stable effort slider whose thumb brightens into a sun at higher effort.
Model-aware reasoning and Fast Mode controls, provider session status improvements, slash references, marketplace management, update controls, and UI polish from the 1.0 stabilization cycle.

Browser downloads remain unavailable to models without a separate explicit approval capability.
Live-view capability tokens remain local to the native view controller and are never added to model context.
Release packaging verifies pinned Node.js and BetterWright archive checksums and includes third-party license notices.
This community build remains ad-hoc signed and is not Apple-notarized.