Severity: Info

Location: bump-runtime.ps1:61-63,97,107-108

Code:

# Statistics counters
$global:totalFilesScanned = 0
$global:filesModified     = 0
$global:totalReplacements = 0
...
$global:totalFilesScanned++
...
$global:filesModified++
$global:totalReplacements += $matchCount

Explanation:
The three statistics counters are assigned to the $global: scope. If this script is dot-sourced (. .\bump-runtime.ps1 10.0) the variables persist in the caller's session after the script exits, polluting the global namespace. Even when run normally, $global: is unnecessarily broad — the counters are only needed inside the script and its helper function.

Suggested fix:
Use $script: scope so the variables are visible to Update-Files but cleaned up when the script exits:

$script:totalFilesScanned = 0
$script:filesModified     = 0
$script:totalReplacements = 0

…and inside Update-Files:

$script:totalFilesScanned++
...
$script:filesModified++
$script:totalReplacements += $matchCount

Same behavior, no session pollution.