624938c284
put_to_history wrote entries without a trailing newline, so fixed commands concatenated onto one line, and backslash-continued multiline entries were read back as broken fragments. Join continuations when reading and terminate entries with a newline, matching the fish adapter convention. Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent) Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>