Runtime evidence for PR 29462
AI-assisted; verified with the tests and tools listed above.

Environment: Linux x64, two isolated script-installed native runtimes, manually started servers.
Build-only fixture: both server package versions set to 0.1.8; client remains 0.1.9.
No application behavior was patched. Empty databases; provider-history import disabled.
Browser: Chromium, 1280x800 CSS, light theme. Host labels redacted in public captures.

BEFORE
$ clipboard command:
npx t3@0.1.9
$ npx --yes t3@0.1.9 --version
t3 v0.1.9
$ readlink /tmp/factory-pr-29462-evidence-1/before/bin/t3
/tmp/factory-pr-29462-evidence-1/before/install/runtime/versions/0.1.8/t3
$ /tmp/factory-pr-29462-evidence-1/before/bin/t3 --version
t3 v0.1.8
$ restart original launcher with identical serve arguments, then read server descriptor
{"serverVersion": "0.1.8", "platform": {"os": "linux", "arch": "x64"}}

AFTER
$ clipboard command:
'/tmp/factory-pr-29462-evidence-1/after/bin/t3' update --base-dir '/tmp/factory-pr-29462-evidence-1/after/install' 0.1.9
$ execute copied command
Checking for updates...
  Updating T3 Code 0.1.8 → 0.1.9

  Downloading...
  Verifying the download...
  Extracting T3 Code...
  Checking the new executable...
  Installed T3 Code 0.1.9

  Run t3 to get started.

  The background service serves %h/.t3 and was left unchanged.
  A server started by hand is still running at http://127.0.0.1:23773 (pid redacted). Stop it and start it again to pick up 0.1.9.
$ readlink /tmp/factory-pr-29462-evidence-1/after/bin/t3
/tmp/factory-pr-29462-evidence-1/after/install/runtime/versions/0.1.9/t3
$ /tmp/factory-pr-29462-evidence-1/after/bin/t3 --version
t3 v0.1.9
$ restart original launcher with identical serve arguments, then read server descriptor
{"serverVersion": "0.1.9", "platform": {"os": "linux", "arch": "x64"}}