npm still serves 0.5.3, which declares Node >=22.22.0 <23, so Node 24
and 26 print an EBADENGINE warning when it installs. 0.5.4 declares
>=22.22.0 <27 and carries what main gained since v0.5.3: a start with no
arguments on ~/Rho, a restart that keeps its address, rho --grant with
--agent, one-line refusals, a generic ACP backend, a cell's own project
Python, the analysis-run and screen-check Skills, and the Data flow
graph from Plugins 2e53dc2.

The README the npm page shows and the shipped HEADLESS.md now install
from the registry with npm install -g rather than a packed tarball, and
no longer call registry publication unverified.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>