Creates an isolated temporary directory and returns its id. Optionally seeds it with files. Every other tool addresses a workspace by this id; paths are always relative to it. Call destroy_workspace when finished.

Writes or overwrites files in an existing workspace, creating parent directories as needed. Paths must be relative and stay inside the workspace. Either every file is written or none is.

Runs a command in a workspace under a fixed environment and a wall clock timeout, then parses the output into a pass/fail summary with failing test names. Output is normalized (paths, durations, timestamps and colour codes removed) so two identical runs produce identical text. Returns the verdict plus both normalized and raw output.

Lists the files in a workspace, or returns the contents of one file when path is given. node_modules and .git are excluded from listings. Listings are sorted, so repeated calls match.

Deletes a workspace and everything in it. Safe to call on an id that no longer exists.