{"record":{"id":"f7fe33477324a6db","repo":"HKUDS/Vibe-Trading","slug":"slack-target-channel-name-is-empty","errorCode":null,"errorMessage":"Slack target channel name is empty","messagePattern":"Slack target channel name is empty","errorType":"validation","errorClass":"ValueError","httpStatus":null,"severity":"warning","filePath":"agent/src/channels/slack.py","lineNumber":232,"sourceCode":"        if self._SLACK_ID_RE.fullmatch(target):\n            if target.startswith((\"U\", \"W\")):\n                return await self._open_dm_for_user(target)\n            return target\n\n        if target.startswith(\"#\"):\n            return await self._resolve_channel_name(target[1:])\n        if target.startswith(\"@\"):\n            return await self._resolve_user_handle(target[1:])\n\n        try:\n            return await self._resolve_channel_name(target)\n        except ValueError:\n            return await self._resolve_user_handle(target)\n\n    async def _resolve_channel_name(self, name: str) -> str:\n        normalized = self._normalize_target_name(name)\n        if not normalized:\n            raise ValueError(\"Slack target channel name is empty\")\n\n        cache_key = f\"channel:{normalized}\"\n        if cache_key in self._target_cache:\n            return self._target_cache[cache_key]\n\n        cursor: str | None = None\n        while True:\n            response = await self._web_client.conversations_list(\n                types=\"public_channel,private_channel\",\n                exclude_archived=True,\n                limit=200,\n                cursor=cursor,\n            )\n            for channel in response.get(\"channels\", []):\n                if self._normalize_target_name(str(channel.get(\"name\") or \"\")) == normalized:\n                    channel_id = str(channel.get(\"id\") or \"\")\n                    if channel_id:\n                        self._target_cache[cache_key] = channel_id","sourceCodeStart":214,"sourceCodeEnd":250,"githubUrl":"https://github.com/HKUDS/Vibe-Trading/blob/80ffdda44c5c4db0dd84d70e051cca591cea67df/agent/src/channels/slack.py#L214-L250","documentation":"Target resolution failed because the channel name, after normalization (strip, remove leading #/@, lowercase), is empty.","triggerScenarios":"Calling send()/target resolution with a target of '#', '@', whitespace, or an empty string.","commonSituations":"User input like '#' passed through, or config placeholder values such as '#{{channel}}' not being interpolated.","solutions":["Pass a real channel name or ID, e.g. '#general' or 'C0123456789'","Validate user-supplied targets before sending","Check templating that produces empty channel names"],"exampleFix":"# before\nawait slack.send('#', ...)\n# after\nawait slack.send('#general', ...)","handlingStrategy":"validation","validationCode":"if not target.strip().strip('#@'):\n    raise ValueError('empty Slack target')","typeGuard":"def is_valid_slack_target(t: str) -> bool:\n    return bool(t and t.strip().strip('#@'))","tryCatchPattern":"except ValueError as e:\n    if 'name is empty' in str(e):\n        reject_user_input('invalid channel target')","preventionTips":["Validate user-entered targets before dispatch","Fail loudly on un-interpolated templates"],"tags":["slack","target","validation"],"backgroundTag":"empty-target-name","analyzedSha":"80ffdda44c5c4db0dd84d70e051cca591cea67df","analyzedAt":"2026-08-28T12:46:38.989Z","schemaVersion":2},"datasetVersion":"2026-08-28T16:17:29.566Z"}