v0.4.1

v0.4.1 / 2026-09-08

Upgrading

Some actions that application developers should consider taking when upgrading from an earlier version:

• Add --development to the hotcell command in Procfile.dev, or wherever a cell boots as a plain process beside the application. Without it a cell told no TMPDIR sweeps /tmp at boot, deleting every file the developer owns there. See the README's "Run it in development".

HotCell::Server

Added

• hotcell --development, for a cell booted as a plain process beside the application. The cell never sweeps the directory it is given, TMPDIR or the system temporary directory, both shared with everything else a developer runs. Its scratch is hotcell-<HOTCELL_DIR with slashes as dashes> beneath it, and it refuses to boot when that name is taken by anything but a directory its uid owns. Before, it swept the developer's /tmp, or on macOS the per-user TMPDIR every shell sets. An explicit HOTCELL_WORKSPACE still has its parent swept. Without the flag nothing changes. cell.boot logs the tmpdir in use.