Module aggregate 

Exit-code aggregation across N child processes.

Two strategies per FR-007 / FR-008:

• Default mode (default_max): max(child_codes) — intuitive “worst child wins” semantic.
• Strict mode (strict_or): bitwise OR over WEXITSTATUS — byte-equal moreutils close_pipes().

Signal-killed children contribute the code 1 (matches moreutils WIFEXITED fallthrough — non-WIFEXITED wait result → ret |= 1).

Functions

default_max

Aggregate child exit codes using max() (Default mode, FR-007).

strict_or

Aggregate child exit codes using bitwise OR (Strict mode, FR-008).