PR: https://git.cafe/pingdotgg/t3code/pulls/33840
PR head: 4343b844871e6fb297cd01c82f182b11b2e4df2d
Main reproduction: github/main d313b2aff31991ab94c8ac80cdc38a54dd575604
Environment: Linux; real /usr/bin/google-chrome driven by repository Playwright 1.60.0.
No mocked providers, seeded state, or demo data.

Setup:
Real Codex npm executable symlinked as:
  /home/user/path-verification/bin /codex
The directory name ends with an ASCII space.
A task-scoped login-shell PATH selected only for these dev-server processes:
  /home/user/path-verification/bin :/home/user/path-verification/tools:/usr/bin:/bin
vp and node in tools are symlinks to the installed tools.
Native execution through this PATH: codex-cli 0.164.0.
Both dev servers used independent empty .t3 state; vp i completed in each checkout.
Created the project pointing at /home/user/path-verification/repo through Add project > Local folder.
Created threads and submitted gpt-6.1-sol turns through the actual web composer.
Only one dev server ran at a time; previous process groups were stopped by captured launch PID.

MAIN:
  vp run dev
  [dev-runner] serverPort=16733 webPort=8693 baseDir=/home/user/main/.t3
  Settings > Providers > Codex: Not found.
  "Could not start Codex CLI (codex)"
  Model picker: No models found.
  Server log: Failed to probe Codex skills for /home/user/path-verification/repo
  Cause: Error: spawn codex ENOENT
  Provider turn cannot start.

PR:
  vp run dev
  [dev-runner] serverPort=13773 webPort=5733 baseDir=/home/user/t3code/.t3
  Settings > Providers > Codex: v0.164.0 Available; 8 models.
  Live child argv: node /home/user/path-verification/bin /codex app-server
  Web composer selected GPT-6.1-Sol.
  Real provider ran pwd, git status --short, cat README.md.
  pwd => /home/user/path-verification/repo
  git status --short => no output
  cat README.md => path verification repository
  Final => PATH_SPACE_OK /home/user/path-verification/repo
  Turn completed in app (Worked for 11s).

NEIGHBOR:
  Restarted same PR with ordinary /home/user/path-verification/bin on PATH.
  Live child argv: node /home/user/path-verification/bin/codex app-server
  Reloaded client; persisted conversation and history remained.
  Submitted follow-up with same gpt-6.1-sol thread; real commands succeeded.
  NORMAL_PATH_RESUME_OK; codex-cli 0.164.0; clean git status.
  The provider's command shell resolved its usual /home/user/.local/bin/codex.
  The server's provider app-server was launched from ordinary path above.
  Missing Claude CLI still reported Not found (no installation was present).

REPEAT WHITESPACE:
  Restarted with trailing-space PATH again.
  Created another thread through client.
  gpt-6.1-sol ran pwd && git status --short, exit success.
  WHITESPACE_PROVIDER_OK /home/user/path-verification/repo
  Turn completed in app (Worked for 14s); short recording captured actual submission and completion.

CHECK:
  blacksmith-check run [task-owned worker] 'vp test run packages/shared/src/shell.test.ts'
  70 passed, 2 platform skips, 1 test file passed.
  Existing CI at tested head: 32 successful, 0 failing, 0 pending.
  No source edits, new test files, commits, or pushes needed.

NOT VERIFIED:
  Native macOS, Windows, Electron desktop, iOS, Android, remote/relay/tunnel clients.
  Real provider discovery for Claude/Cursor/Grok/OpenCode/Antigravity/Kiro.
  No live Unicode-whitespace provider installation was exercised.