From a7334131fab99abf706346dfaac6e1016bd5717d Mon Sep 17 00:00:00 2001
From: Richard Levasseur <richardlev@gmail.com>
Date: Mon, 21 Sep 2026 23:50:13 -0700
Subject: [PATCH] build(release): fetch PR body in get_pr_info and grant PR
 read permissions

The release preparation completion workflow parses the merged PR body to
locate the associated release tracking issue. Previously, the workflow
failed to resolve the tracking issue because `get_pr_info` omitted the
PR `body` field and the GitHub Actions workflow lacked permission to
read pull requests.

Request the `body` field when querying PR metadata and grant
`pull-requests: read` permission to the workflow so it can extract the
issue number from the merged preparation PR.

Work towards #4175
---
 .../workflows/release_complete_prepare.yaml   |  1 +
 dev/release/gh.py                             |  4 ++--
 tests/tools/private/release/gh_test.py        | 23 +++++++++++++++++++
 3 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/release_complete_prepare.yaml b/.github/workflows/release_complete_prepare.yaml
index 8315057da3..6d07024de6 100644
--- a/.github/workflows/release_complete_prepare.yaml
+++ b/.github/workflows/release_complete_prepare.yaml
@@ -27,6 +27,7 @@ on:
 permissions:
   contents: write
   issues: write
+  pull-requests: read
 
 jobs:
   complete_prepare:
diff --git a/dev/release/gh.py b/dev/release/gh.py
index b3bff9c214..ec43662bd9 100644
--- a/dev/release/gh.py
+++ b/dev/release/gh.py
@@ -731,9 +731,9 @@ def get_pr_info(self, pr_num: int) -> PrDict:
             pr_num: The PR number.
 
         Returns:
-            Dictionary containing PR fields (state, isDraft, mergeCommit, etc.).
+            Dictionary containing PR fields (state, isDraft, mergeCommit, body, etc.).
         """
-        output = self._gh_pr_view(pr_num, "state", "isDraft", "mergeCommit")
+        output = self._gh_pr_view(pr_num, "state", "isDraft", "mergeCommit", "body")
         return json.loads(output) if output else {}
 
     @override
diff --git a/tests/tools/private/release/gh_test.py b/tests/tools/private/release/gh_test.py
index e1aea0e8cf..814bedb3dc 100644
--- a/tests/tools/private/release/gh_test.py
+++ b/tests/tools/private/release/gh_test.py
@@ -122,6 +122,29 @@ def test_get_pr_files(gh, auto_patch_cmd_helpers):
     )
 
 
+def test_get_pr_info(gh, auto_patch_cmd_helpers):
+    auto_patch_cmd_helpers.run_gh.return_value = (
+        '{"state": "MERGED", "isDraft": false, '
+        '"mergeCommit": {"oid": "abc1234"}, "body": "Work towards #4175"}'
+    )
+    info = gh.get_pr_info(123)
+    assert info == {
+        "state": "MERGED",
+        "isDraft": False,
+        "mergeCommit": {"oid": "abc1234"},
+        "body": "Work towards #4175",
+    }
+    auto_patch_cmd_helpers.run_gh.assert_called_with(
+        "pr",
+        "view",
+        "123",
+        "--json=state,isDraft,mergeCommit,body",
+        "--repo=my-owner/my-repo",
+        check=True,
+        capture_output=True,
+    )
+
+
 def test_get_pr_files_not_found(gh, auto_patch_cmd_helpers):
     auto_patch_cmd_helpers.run_gh.side_effect = subprocess.CalledProcessError(1, ["gh"])
     with pytest.raises(GetPrError, match="Failed to get PR #123 on my-owner/my-repo"):