- State the contract precisely: the cut never introduces a lone high
surrogate, and an unpaired surrogate the input already carries is not
repaired.
- Document the new export in the package README: a character-budget preview
section naming the persistent bash and pwsh shells and str_replace_editor,
plus a Known Limitations bullet that no longer contradicts it.
- Drop the assertion restatement from the two shell test comments.
- Let the str-replace test helper reuse a root so the clipped context reads
its file inside its own working directory.
mektpoy
223ad4c373