get_history_correction aligns a failed script with near-identical
history commands segment by segment (shell_ast words with byte-true
offsets) and splices the corrected tokens back in place. It only
returns a fix when exactly one candidate matches the structure with
at most two diverged tokens, each at least 80 percent similar;
looser or ambiguous matches decline so the asking history rule
stays in charge of them.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
Alexander