PR #32860, head 32f316332066b0899f9c18547b656b2c2ed0c189
Scope: only apps/server/src/provider/ProviderInstanceRegistry.test.ts changed.
Production provider code is unchanged.

BEFORE: github/main 331889a13560e6d8885629e2a6e89b2203ebf2cf
Separate /home/user/main worktree; vp i completed.
Blacksmith worker, existing test, HOME set to an isolated directory containing {"type":"commonjs"}:
  HOME=/tmp/t3-commonjs-home vp test run apps/server/src/provider/ProviderInstanceRegistry.test.ts -t "runs Codex and Claude readiness probes from configured tilde paths"
  Claude Agent CLI version probe exited with a non-zero status. exitCode: 1
  expected: { status: 'ready', installed: true, version: '2.1.219' }
  actual:   { installed: true, version: '26.12.1', status: 'error' }
  1 failed, 24 skipped.
This reproduces the fixture execution failure. It is not a production app bug.

AFTER: exact PR head 32f316332066b0899f9c18547b656b2c2ed0c189
vp i completed.
Blacksmith worker, same HOME condition:
  HOME=/tmp/t3-commonjs-home vp test run apps/server/src/provider/ProviderInstanceRegistry.test.ts
  25 passed.
  vp run check:changed 09a54f01bc0ae83865347a965ced50f8c8ec2953
  pass format, lint, knip 1/2, knip 2/2, graphql, typecheck (3 packages), tests (27 in 2 files).

REAL APP, LOCAL LINUX VM
One dev server at a time; main stopped by its captured process group before PR.
Main ports: server 16733, web 8693. PR: server 13773, web 5733.
PR isolated home: /home/user/t3code/.t3.
Repo Playwright with /usr/bin/google-chrome; project added through UI pointing at /home/user/t3code.
Main and PR: selected Codex gpt-6.1-sol, submitted:
  reply with exactly: provider verification ok. do not use tools or edit files.
Both returned:
  provider verification ok.
PR follow-up:
  what exact phrase did you reply with previously? repeat only that phrase. do not use tools.
Returned:
  provider verification ok.
Providers > Refresh provider status:
  Codex v0.164.0 Available
  Claude v2.1.321 Not authenticated; run claude auth login.
Configured Codex binary to ~/.local/bin/codex through Settings; refresh remained Available and the path persisted across reload.
Reopened thread after reload; both responses persisted.

NOT VERIFIED
Real Claude model turn: no Claude login on this VM.
Native Electron, iOS/Android, macOS/Windows, and remote/tunnel paths were not exercised.
The fixture-only change has no changed production UI behavior to reproduce.