PR #29892, head 7cf96097aeebbf251d4880778330a0fc47e50d76
main baseline: 61c3794c32b0eeebfac09add43e403618c65d2d7
Linux Chrome, Playwright 1.60 from repo dependencies, real dev servers sequentially.
Project added through UI: /home/user/checkout-verification (real clone of pingdotgg/t3code, github.com origin).

main, web 8693 / server 16733:
  branch search https://github.acme.test/acme/web/pull/42 -> only Create new ref, no Checkout pull request.
  checkout dialog same URL -> Use a pull request URL, checkout command, 123, or #123.
Stopped main process group captured at startup, PID 25562. Both main listeners gone.

PR, web 5733 / server 13773:
  same enterprise URL -> Checkout pull request offered.
  click -> server getChangeRequest -> No GitHub credential for github.acme.test.
  gh pr checkout https://github.acme.test/acme/web/pull/42 -> same host-specific credential error.
  invalid text -> validation error, no checkout.
  https://github.com/pingdotgg/t3code/pull/29892 -> actual PR title, head and base resolved.
  Local -> checkout completed.
  git -C /home/user/checkout-verification rev-parse HEAD:
    7cf96097aeebbf251d4880778330a0fc47e50d76
  git -C /home/user/checkout-verification branch --show-current:
    fix/github-enterprise-pr-url-checkout
  #29892 -> same actual PR resolves.
  UI Codex gpt-6.1-sol turn requested git HEAD and branch, no file modifications.
  Turn completed in 22s and reported same SHA and branch. Worktree stayed clean.

blacksmith:
  focused parser + GitHub definition tests: 31 passed.
  check:changed with explicit base (snapshot history fetched first): format, lint, knip,
  graphql, 11 package typechecks, 32 tests all passed.
  Initial default check could not find snapshot/main merge base; rerun above succeeded.
GitCafe checks: 31 successful, 0 failing, 0 pending.

Limitation: no live GHES host or credential. Enterprise authenticated resolution/fetch/checkout
is unverified. The runtime evidence proves input recognition and correct server host dispatch.
Native mobile and Electron shells, remote relay/tunnel were not exercised.
No source changes, commits, pushes, merges, labels, or other PR mutations.