- Validated every stage of a pipeline against `simple_command_is_safe` instead of only the first stage to prevent improper segmentation of compound shell constructs.
- Guarded segment re-execution by verifying that each `Display`-reconstructed command parses back to the expected pipeline shape.
- Configured segmented-chain execution to fall back to an unsegmented, whole-command path whenever a reconstructed segment diverges from the original AST.
- Resolved a syntax error during command execution by preventing `Display` from stripping terminators from compound commands like `while` and `for` loops.
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