Two fixes to make `codegraph upgrade` trustworthy in the terminal it ran in:
1. detectInstallMethod checked the bundle layout before the node_modules
path check, but the npm thin-installer's per-platform package IS a
complete bundle inside node_modules — so every npm install misdetected
as a standalone bundle, and upgrade curled install.sh into ~/.codegraph:
a second install that never wins the PATH race against npm's shim,
leaving `codegraph -v` permanently on the old version. Path-based
checks (_npx, node_modules) now win over layout sniffing, so npm
installs upgrade through npm again, in place.
2. After a successful swap, runUpgrade now probes the PATH-resolved
`codegraph --version` and reports the real outcome: a green
confirmation that this terminal already serves the new version, a
loud shadow warning naming the fix (`which -a codegraph`) on
mismatch, or the old soft new-terminal hint only when the probe is
inconclusive. Replaces the unconditional "open a new terminal if the
version looks unchanged" hedge. Skipped for npm-local installs, whose
binary PATH never serves.
Companion to #1239: the misdetection also broke its post-upgrade
`install --refresh` for npm users (the spawn resolved the stale shim).
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
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