diff --git a/adapters/PUBLISHED.toml b/adapters/PUBLISHED.toml
index ecd25c3..19c3167 100644
--- a/adapters/PUBLISHED.toml
+++ b/adapters/PUBLISHED.toml
@@ -61,7 +61,7 @@
 # version table below, never in neither: absence alone would let a deleted row read as "not
 # published yet", which is this file's guard dying in the one way it has not yet died. A release
 # pass moves a name out of here and adds its table **after** the upload succeeds.
-unreleased = ["langchain"]
+unreleased = []
 
 [langgraph]
 version = "1.3.0"
@@ -70,3 +70,7 @@ kernel = ">=0.5,<0.13"
 [openai-agents]
 version = "1.3.0"
 kernel = ">=0.5,<0.13"
+
+[langchain]
+version = "1.0.0"
+kernel = ">=0.12,<0.13"
diff --git a/tests/test_packaging.py b/tests/test_packaging.py
index 10d4c1e..c16594e 100644
--- a/tests/test_packaging.py
+++ b/tests/test_packaging.py
@@ -961,6 +961,11 @@ def test_a_widened_kernel_range_is_not_shipped_without_a_new_version(adapter):
         "1.2.0": ">=0.5,<0.12",
         "1.3.0": ">=0.5,<0.13",
     },
+    # Read from PyPI's own requires_dist for 1.0.0 after the upload succeeded, not from the
+    # tree: the point of this table is to be the other side of that comparison.
+    "langchain": {
+        "1.0.0": ">=0.12,<0.13",
+    },
 }