LangSmithSandbox

Return the LangSmith sandbox name.

Execute a shell command inside the sandbox.

Write content using the LangSmith SDK to avoid ARG_MAX.

BaseSandbox.write() sends the full content in a shell command, which can exceed ARG_MAX for large content. This override uses the SDK's native write(), which sends content in the HTTP body, but preserves the same existence check and parent-directory creation as BaseSandbox.write().

Read file content using the LangSmith SDK.

BaseSandbox.read() pipes file content through execute(), which can hang or exceed transport limits for large files. This override fetches bytes directly via the SDK and reproduces the base-class pagination semantics locally:

• Empty files surface the "empty contents" reminder.
• Files routed as binary by extension (or that fail UTF-8 decode) are returned base64-encoded, capped at MAX_BINARY_BYTES.
• Text content is normalized for universal newlines (\r\n and bare \r collapse to \n), split on \n, paginated by offset / limit, joined back with \n, and capped at MAX_OUTPUT_BYTES with TRUNCATION_MSG appended on overflow.

Download multiple files from the LangSmith sandbox.

Supports partial success -- individual downloads may fail without affecting others.

Upload multiple files to the LangSmith sandbox.

Supports partial success -- individual uploads may fail without affecting others.