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1840b73209
`LangSmithLoader.lazy_load()` now raises a `ValueError` with a descriptive message when a configured `content_key` cannot be resolved against an example's inputs — whether a key along the path is missing or the path runs into a non-mapping value. Previously the missing-key case raised a bare `KeyError` and the non-mapping case raised a `TypeError`, depending on the payload. Callers that caught `KeyError` or `TypeError` around `lazy_load()` to detect a misconfigured `content_key` should now catch `ValueError`. --- Improve `LangSmithLoader` error handling by surfacing clearer exceptions for conflicting client configuration and invalid nested `content_key` paths. Valid loader behavior is unchanged; this only improves invalid-input diagnostics. When a `content_key` cannot be resolved against an example's inputs, `lazy_load()` now raises a `ValueError` whose message names the full path, the offending key, and where traversal stopped — instead of a bare `KeyError` (missing key) or an opaque `TypeError` (path running into a non-mapping value, e.g. a leaf string). --------- Co-authored-by: Divy Yadav <yadavdipu296@gmai.com> Co-authored-by: Mason Daugherty <github@mdrxy.com> Co-authored-by: Mason Daugherty <mason@langchain.dev>