From 009d202231220981f5e64ada04daa0c2730d108f Mon Sep 17 00:00:00 2001
From: Olivier Mehani <omehani@mozilla.com>
Date: Fri, 7 Aug 2026 12:04:15 +1000
Subject: [PATCH 1/2] cli: inspect detail and details keys on error (bug
 2059648)

---
 lando_cli/cli.py | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/lando_cli/cli.py b/lando_cli/cli.py
index 06b84f6..78172c9 100644
--- a/lando_cli/cli.py
+++ b/lando_cli/cli.py
@@ -147,7 +147,14 @@ def post_actions(
 
         try:
             response_json = result.json()
-            click.echo(response_json["details"])
+            # Bug 2059648: check the desired property,
+            # but fall back to the deprecated one.
+            click.echo(
+                response_json.get(
+                    "detail",
+                    response_json.get("details", "(missing detail in error response)"),
+                )
+            )
         except Exception:
             click.echo("Unknown error.")
 

From f69bfde9bade166fddfaaf7f5de4a142780060a8 Mon Sep 17 00:00:00 2001
From: Olivier Mehani <omehani@mozilla.com>
Date: Mon, 10 Aug 2026 13:59:02 +1000
Subject: [PATCH 2/2] test: add test for detail/details support

---
 tests/test_cli.py | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/tests/test_cli.py b/tests/test_cli.py
index 606bf4f..0204fae 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -1,6 +1,8 @@
 from typing import Callable
 import pytest
 from pathlib import Path
+import requests
+import requests_mock
 import subprocess
 
 from lando_cli.cli import (
@@ -12,9 +14,15 @@
     detect_merge_from_current_head,
     determine_base_sha_for_push,
     get_current_branch,
+    post_actions,
 )
 
 
+@pytest.fixture
+def config() -> Config:
+    return Config("token", "https://lando.example.net", "user@example.net", True)
+
+
 @pytest.mark.parametrize(
     "config_content, expected, should_raise",
     [
@@ -230,3 +238,25 @@ def test_determine_base_sha_for_push_with_relbranch_missing(
         "branch_name": "FIREFOX_101_RELBRANCH",
         "commit_sha": merge_base,
     }
+
+
+@pytest.mark.parametrize("error_key", ("detail", "details", None))
+def test_post_actions_error_details(
+    config: Config, capsys: pytest.CaptureFixture, error_key: str | None
+):
+    with requests_mock.Mocker() as m:
+        repo_name = "test-repo"
+        m.post(
+            f"{config.lando_url}/api/repo/{repo_name}",
+            json={error_key: "Some error"},
+            status_code=400,
+        )
+        with pytest.raises(requests.HTTPError):
+            post_actions(config, repo_name, [{}])
+
+    outerr = capsys.readouterr()
+
+    if error_key:
+        assert "Some error" in outerr.out
+    else:
+        assert "(missing detail in error response)" in outerr.out