[xAlcatraZx]

Summary

• Add 13 byte-exact US overlay functions.
• Increase exact-matched code by 1,264 bytes.
• Update the US matching map, progress report, and README.

Validation

• 13/13 functions verified as EXACT.
• All 13 functions compiled successfully.
• US matching map and progress checks passed.
• No new relocation mismatches observed.

Outstanding checks

• PAL validation is incomplete because baserom/pal/main.elf is unavailable locally.
• The relocation audit reports 27 previously observed mismatches in unrelated functions.
• A full integrated rebuild was not repeated for this batch; targeted compilation and matching checks were performed.