From 3db435563dc71655d8a3f80b668fb4e3fb7d4b4d Mon Sep 17 00:00:00 2001
From: Sydney Duckworth <sydduckworth@users.noreply.github.com>
Date: Tue, 24 Mar 2026 16:24:10 -0400
Subject: [PATCH 1/4] added __delitem__ method to AsdfFile

---
 asdf/_asdf.py           | 3 +++
 asdf/_tests/test_api.py | 7 +++++++
 2 files changed, 10 insertions(+)

diff --git a/asdf/_asdf.py b/asdf/_asdf.py
index 88d320ccd..32a3bf09c 100644
--- a/asdf/_asdf.py
+++ b/asdf/_asdf.py
@@ -548,6 +548,9 @@ def __getitem__(self, key):
     def __setitem__(self, key, value):
         self.tree[key] = value
 
+    def __delitem__(self, key):
+        del self.tree[key]
+
     def __contains__(self, item):
         return item in self.tree
 
diff --git a/asdf/_tests/test_api.py b/asdf/_tests/test_api.py
index 8ac5d514e..1a8d70603 100644
--- a/asdf/_tests/test_api.py
+++ b/asdf/_tests/test_api.py
@@ -165,6 +165,13 @@ def test_top_level_tree(small_tree):
     ff2["tree"] = small_tree
     assert_tree_match(ff2.tree["tree"], ff2["tree"])
 
+    ff3 = asdf.AsdfFile(tree)
+    assert "tree" in ff3
+    del ff3["tree"]
+    assert "tree" not in ff3
+    with pytest.raises(KeyError):
+        _ = ff3["tree"]
+
 
 def test_top_level_keys(small_tree):
     tree = {"tree": small_tree}

From 9dd45a65968feb5aef0369e780c830b2aacca0ed Mon Sep 17 00:00:00 2001
From: Sydney Duckworth <sydduckworth@users.noreply.github.com>
Date: Tue, 24 Mar 2026 16:33:02 -0400
Subject: [PATCH 2/4] added changelog entry

---
 changes/2008.feature.rst | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 changes/2008.feature.rst

diff --git a/changes/2008.feature.rst b/changes/2008.feature.rst
new file mode 100644
index 000000000..28bee098b
--- /dev/null
+++ b/changes/2008.feature.rst
@@ -0,0 +1 @@
+Added `__delitem__` method to `AsdfFile`.

From ddc81eda37fc7e0e08ee83e8b131cc3704e5726f Mon Sep 17 00:00:00 2001
From: Sydney Duckworth <sydduckworth@users.noreply.github.com>
Date: Tue, 24 Mar 2026 16:41:21 -0400
Subject: [PATCH 3/4] changed changelog entry from feature to bug to match
 source issue

---
 changes/{2008.feature.rst => 2008.bugfix.rst} | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
 rename changes/{2008.feature.rst => 2008.bugfix.rst} (100%)

diff --git a/changes/2008.feature.rst b/changes/2008.bugfix.rst
similarity index 100%
rename from changes/2008.feature.rst
rename to changes/2008.bugfix.rst

From 6f01a60fc2f155de7ea262e1e928d6bc0a1d9453 Mon Sep 17 00:00:00 2001
From: Sydney Duckworth <sydduckworth@users.noreply.github.com>
Date: Tue, 24 Mar 2026 17:20:21 -0400
Subject: [PATCH 4/4] fixed broken reference in changelog entry

---
 changes/2008.bugfix.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/changes/2008.bugfix.rst b/changes/2008.bugfix.rst
index 28bee098b..41bf2289b 100644
--- a/changes/2008.bugfix.rst
+++ b/changes/2008.bugfix.rst
@@ -1 +1 @@
-Added `__delitem__` method to `AsdfFile`.
+Added ``__delitem__`` method to `AsdfFile`.