attune-harness 1.0.0rc2

Attune Harness 1.0.0rc2 is a release candidate, not stable 1.0.

This candidate fixes fresh voyage and all installations by pinning
httpx2==2.13.0, the version required by the signed Voyage plugin import closure.
An unconstrained rc1 installation could select 2.13.1 and refuse that plugin path.
No saved-state format or public CLI contract changed. Rc1 and its evidence remain
available; use rc2 for new candidate installations.

Install explicitly into an isolated environment:

pipx install 'attune-harness[all]==1.0.0rc2'

Release commit: 6ed6b1825c8c2846f39a7ef4c0cc2063106d573f.

Release notes ·
Qualification and limits ·
Main qualification run

The candidate observation period and separate stable-release acceptance still
apply. Publication does not establish model quality or full Attune AI parity.