install.sh kept each release in its own versions/<v> dir (~50 MB with the
vendored Node runtime) and only moved the `current` symlink, so old versions
accumulated forever across upgrades. Keep only the just-installed version and
delete the rest; `codegraph upgrade` re-runs install.sh, so this covers
upgrades too. The npm-shim self-heal cache (~/.codegraph/bundles/) prunes the
same way. Windows installs overwrite a single dir in place and were never
affected.
Validated real-world on macOS, Linux (Docker/dash), and Windows (VM): a
v1.1.2 -> v1.1.4 install leaves only the latest behind.
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
