feat: default org to langchain-ai when repo name specified without org (#1099)

* feat: default org to langchain-ai when repo: is used without org prefix

* chore: use SLACK_REPO_OWNER for repo shorthand default org and document in CUSTOMIZATION.md

---------

Co-authored-by: open-swe[bot] <open-swe@users.noreply.github.com>

CUSTOMIZATION.md

@@ -289,7 +289,7 @@ SLACK_REPO_OWNER="my-org"
 SLACK_REPO_NAME="my-repo"
 ```
 
-Users can override per-message with `repo:owner/name` syntax in their Slack message.
+Users can override per-message with `repo:owner/name` syntax in their Slack message. A shorthand `repo:name` (without the org) is also supported — the org defaults to the value of `SLACK_REPO_OWNER`.
 
 ### Adding a new trigger
 

agent/webapp.py

@@ -355,9 +355,14 @@ async def get_slack_repo_config(message: str, channel_id: str, thread_ts: str) -
     name: str | None = None
 
     if "repo:" in message or "repo " in message:
-        match = re.search(r"repo[: ]([a-zA-Z0-9_.-]+/[a-zA-Z0-9_.-]+)", message)
+        match = re.search(r"repo[: ]([a-zA-Z0-9_.\-/]+)", message)
         if match:
-            owner, name = match.group(1).split("/", 1)
+            value = match.group(1).rstrip("/")
+            if "/" in value:
+                owner, name = value.split("/", 1)
+            else:
+                owner = default_owner
+                name = value
 
     if not owner or not name:
         github_match = re.search(r"github\.com/([a-zA-Z0-9_.-]+/[a-zA-Z0-9_.-]+)", message)

tests/test_slack_context.py

@@ -321,3 +321,39 @@ def test_get_slack_repo_config_github_url_beats_thread_metadata(
     )
 
     assert repo == {"owner": "langchain-ai", "name": "langgraph-api"}
+
+
+def test_get_slack_repo_config_repo_name_only_defaults_org(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    """repo:name without org should default owner to langchain-ai."""
+    threads_client = _FakeThreadsClient(raise_not_found=True)
+
+    async def fake_post_slack_thread_reply(channel_id: str, thread_ts: str, text: str) -> bool:
+        return True
+
+    monkeypatch.setattr(webapp, "get_client", lambda url: _FakeClient(threads_client))
+    monkeypatch.setattr(webapp, "post_slack_thread_reply", fake_post_slack_thread_reply)
+
+    repo = asyncio.run(
+        webapp.get_slack_repo_config("fix bug in repo:langchainplus", "C123", "1.234")
+    )
+
+    assert repo == {"owner": "langchain-ai", "name": "langchainplus"}
+
+
+def test_get_slack_repo_config_repo_name_only_space_syntax(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    """repo name (space syntax, no org) should default owner to langchain-ai."""
+    threads_client = _FakeThreadsClient(raise_not_found=True)
+
+    async def fake_post_slack_thread_reply(channel_id: str, thread_ts: str, text: str) -> bool:
+        return True
+
+    monkeypatch.setattr(webapp, "get_client", lambda url: _FakeClient(threads_client))
+    monkeypatch.setattr(webapp, "post_slack_thread_reply", fake_post_slack_thread_reply)
+
+    repo = asyncio.run(webapp.get_slack_repo_config("fix bug in repo open-swe", "C123", "1.234"))
+
+    assert repo == {"owner": "langchain-ai", "name": "open-swe"}