real dev verification of pingdotgg/t3code pr 29170
main: 6f41364805e31a1f8d59c18c7cc451630cd9265d
pr: 0d0c4d5e278e1cc239c720e31189de0704c8f811
client: playwright 1.60.0, /usr/bin/google-chrome, linux
provider: codex gpt-6.1-sol via local proxy, real completed turns on both revisions
repository: real clone of https://gitlab.com/gitlab-org/cli.git; origin reconfigured to http://gitlab.com:8080/gitlab-org/cli.git to exercise URL construction; no GitLab server is running on that port.
projects and threads created through web UI; no mocks or seeded/demo state.

main: command palette > link pull request > #5 > link
[
  {
    "type": "thread.pull-request.link",
    "commandId": "566b08d7-e4c8-4e1c-9fa1-11b78f1ad478",
    "threadId": "f08a8d38-f7b9-4b35-a041-4af3b1ff5006",
    "host": "gitlab.com",
    "repository": "gitlab-org/cli",
    "number": 5,
    "url": "https://gitlab.com/gitlab-org/cli/-/merge_requests/5",
    "source": "manual"
  }
]
rendered sidebar href: https://gitlab.com/gitlab-org/cli/-/merge_requests/5

pr: same UI flow
[
  {
    "type": "thread.pull-request.link",
    "commandId": "29f38d56-4074-41ae-bbcb-c8886cb8e538",
    "threadId": "51032865-0df7-4570-92bb-0b49d7d026aa",
    "host": "gitlab.com",
    "repository": "gitlab-org/cli",
    "number": 5,
    "url": "http://gitlab.com:8080/gitlab-org/cli/-/merge_requests/5",
    "source": "manual"
  }
]
rendered sidebar href (also after reload): http://gitlab.com:8080/gitlab-org/cli/-/merge_requests/5

pr real provider MCP calls:
[
  {
    "tool": "link_pull_request",
    "arguments": {
      "host": "gitlab.com",
      "repository": "gitlab-org/cli",
      "number": 5
    },
    "status": "completed",
    "result": {
      "host": "gitlab.com",
      "repository": "gitlab-org/cli",
      "number": 5,
      "url": "http://gitlab.com:8080/gitlab-org/cli/-/merge_requests/5",
      "alreadyLinked": false
    }
  },
  {
    "tool": "list_thread_pull_requests",
    "arguments": {},
    "status": "completed",
    "result": {
      "pullRequests": [
        {
          "host": "gitlab.com",
          "repository": "gitlab-org/cli",
          "number": 5,
          "url": "http://gitlab.com:8080/gitlab-org/cli/-/merge_requests/5",
          "source": "agent",
          "watching": false,
          "state": null,
          "title": null,
          "headBranch": null,
          "baseBranch": null,
          "isDraft": null,
          "stack": null
        }
      ],
      "chains": [
        {
          "kind": "derived",
          "numbers": [
            5
          ]
        }
      ]
    }
  }
]

neighbor checks:
- unlink via panel actions keyboard menu removes sidebar and panel link.
- explicit https://gitlab.com/gitlab-org/cli/-/merge_requests/6 stays https without remote port.
- panel actions mouse target is overlapped by link; keyboard works. existing panel source is unchanged by this PR.

blacksmith scoped tests: 3 files, 48 tests passed (GitLab definition, client link input, server MCP handlers).
not verified: fetching MR details or navigation to an actual GitLab service on custom port (glab absent, no service provisioned); native desktop/mobile.