pr: https://git.cafe/pingdotgg/t3code/pulls/26823
head: ed9825fb66fa95ad2a01eab16036256a6907c16a
client: real dev web app, Playwright from repo dependencies, /usr/bin/google-chrome
provider: genuine OpenCode 1.14.19 native upgrade; Codex gpt-6.1-sol through local proxy

main 32ecd71726: settings > providers > OpenCode > update now
observed repeated Upgrading spinner frames concatenated and truncated at 200 characters.
original pr e688c05865: same real upgrade still concatenated spinner frames.
actual installer redraw bytes: ESC[999D ESC[J

regression case added to existing providerMaintenanceRunner.test.ts:
blacksmith: 1 failed, 17 passed; expected last, received firstsecondlast.
fix: recognize ESC[999D alongside cursor-to-column-one G forms.
blacksmith: 18 tests passed.
blacksmith: vp run check:changed 9e09926d97824179d97311d1a810c6b5bb60d2d1
format, lint, knip (both), graphql, typecheck (3 packages), focused test suite: passed.
explicit pr base was used because the isolated worker initially had no origin/main merge base.

fixed app, same native binary and settings:
2026-10-30T10:37:01.069Z Checking for the latest version
2026-10-30T10:37:02.069Z Running opencode upgrade
2026-10-30T10:37:03.076Z 
2026-10-30T10:37:04.068Z ◑ Upgrading.
2026-10-30T10:37:05.074Z ◑ Upgrading..
2026-10-30T10:37:06.078Z Verifying the installed version
2026-10-30T10:37:11.292Z Update command completed, but T3 Code still detects an outdated provider version.

update button disabled during installation and verification: observed true.
completion: app restored Update now and warned that the configured version remains outdated.
configured OpenCode still reports 1.14.19. successful binary replacement is not claimed.
real Codex web turns: BASELINE_CODEX_OK on main, PR_CODEX_OK on original head, FIXED_CODEX_OK after fix.
all requested git status --short and completed in the actual client.

limits: native mobile, desktop shell, Windows/macOS installers, relay/tunnel connections not exercised.
intermittent initial CLI version probes exceeded 10 seconds; a successful UI refresh recovered before the recorded fixed upgrade.