diff --git a/.run/P36/delever/calibration.json b/.run/P36/delever/calibration.json
index 06ff998590..3f69999bb0 100644
--- a/.run/P36/delever/calibration.json
+++ b/.run/P36/delever/calibration.json
@@ -1,7 +1,7 @@
 {
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+ "head": "f4ac36ccf",
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+ "generated": "2026-09-12 18:40",
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diff --git a/.run/P37/baseline/r22_t4_sig11b.log b/.run/P37/baseline/r22_t4_sig11b.log
new file mode 100644
index 0000000000..4327472cf4
--- /dev/null
+++ b/.run/P37/baseline/r22_t4_sig11b.log
@@ -0,0 +1,476 @@
+clean: removed build/, expected/, and the regenerated splat tree (asm/, assets/, undefined_*_auto.txt).
+disc-extract: up to date — extracted/retail/ matches the committed manifest (sha1 e5c6019249dec3c71bb2cf40658a78439dddb037)
+splat 0.41.0 (powered by spimdisasm 1.41.0)
+
  0%|          | 0/1096 [00:00<?, ?it/s]
Loading symbols (symbols.us):   0%|          | 0/1096 [00:00<?, ?it/s]
Loading symbols (symbols.us): 100%|██████████| 1096/1096 [00:00<00:00, 219676.82it/s]
+
  0%|          | 0/47 [00:00<?, ?it/s]
Loading symbols (symbols.us.ram):   0%|          | 0/47 [00:00<?, ?it/s]
Loading symbols (symbols.us.ram): 100%|██████████| 47/47 [00:00<00:00, 619912.86it/s]
+
  0%|          | 0/2 [00:00<?, ?it/s]
Scanning header:   0%|          | 0/2 [00:00<?, ?it/s]
Scanning main:   0%|          | 0/2 [00:00<?, ?it/s]  
+Rodata segment '800' may belong to the text segment '800'
+    Based on the usage from the function LzssDecodeSector to the symbol jtbl_80072A38
+
+The rodata segment '800' has jumptables that are not aligned properly file-wise, indicating one or more likely file split.
+File split suggestions for this segment will follow in config yaml format:
+      - [0x6324C, .rodata]
+      - [0x63388, .rodata]
+      - [0x633FC, .rodata]
+
+
+Rodata segment '800_b' may belong to the text segment '800_b'
+    Based on the usage from the function func_8002B0B4 to the symbol jtbl_80072E44
+
+Rodata segment '800_b_2' may belong to the text segment '800_b_2'
+    Based on the usage from the function func_8002DC68 to the symbol jtbl_80072F3C
+
+The rodata segment '800_b_2' has jumptables that are not aligned properly file-wise, indicating one or more likely file split.
+File split suggestions for this segment will follow in config yaml format:
+      - [0x63920, .rodata]
+
+
+Rodata segment '800_c' may belong to the text segment '800_c'
+    Based on the usage from the function func_80035270 to the symbol jtbl_800732A0
+
Scanning main: 100%|██████████| 2/2 [00:01<00:00,  1.59it/s]
Scanning main: 100%|██████████| 2/2 [00:01<00:00,  1.59it/s]
+
  0%|          | 0/2 [00:00<?, ?it/s]
Splitting header:   0%|          | 0/2 [00:00<?, ?it/s]
Splitting main:   0%|          | 0/2 [00:00<?, ?it/s]  
Splitting main: 100%|██████████| 2/2 [00:00<00:00,  2.62it/s]
Splitting main: 100%|██████████| 2/2 [00:00<00:00,  2.62it/s]
+
  0%|          | 0/2 [00:00<?, ?it/s]
Linker script header:   0%|          | 0/2 [00:00<?, ?it/s]
Linker script main:   0%|          | 0/2 [00:00<?, ?it/s]  
Linker script main: 100%|██████████| 2/2 [00:00<00:00, 105.51it/s]
+Split 340 KB (82.28%) in defined segments
+              header:     2 KB (0.50%) 1 split, 0 cached
+                   c:   338 KB (81.78%) 85 split, 0 cached
+             unknown:      0 B (0.00%) from unknown bin files
+ld_interleave --order: .main island = 8 pieces [53198.data.o, 800.o, 63470.data.o, 800_b.o, 800_b_2.o, 63940.data.o, 800_c.o, 63C4C.data.o]; pre=0 text=85 empties=166 bss=85
+[ OK ] ov_SC05_000
+[ OK ] resident
+[ OK ] ov_SC01_000
+[ OK ] ov_SC04_000
+[ OK ] ov_SC06_000
+[ OK ] ov_SC03_002
+[ OK ] ov_SC01_005
+[ OK ] ov_SC01_006
+[ OK ] ov_SC01_077
+[ OK ] ov_SC04_019
+[ OK ] ov_SC02_000
+[ OK ] ov_SC02_003
+[ OK ] ov_SC04_018
+[ OK ] ov_SC03_006
+[ OK ] ov_SC03_001
+[ OK ] ov_SC01_001
+[ OK ] ov_SC01_004
+[ OK ] ov_SC01_074
+[ OK ] ov_SC01_008
+[ OK ] ov_SC02_004
+[ OK ] ov_SC07_000
+[ OK ] ov_SC02_015
+[ OK ] ov_SC02_021
+[ OK ] ov_SC01_080
+[ OK ] ov_SC01_084
+[ OK ] ov_SC02_016
+[ OK ] ov_SC01_009
+[ OK ] ov_SC02_005
+[ OK ] ov_SC02_026
+[ OK ] ov_SC02_011
+[ OK ] ov_SC02_031
+[ OK ] ov_SC03_003
+[ OK ] ov_SC02_039
+[ OK ] ov_SC02_028
+[ OK ] ov_SC02_027
+[ OK ] ov_SC02_035
+[ OK ] ov_SC02_017
+[ OK ] ov_SC02_041
+[ OK ] ov_SC03_010
+[ OK ] ov_SC03_011
+[ OK ] ov_SC03_012
+[ OK ] ov_SC03_013
+[ OK ] ov_SC03_007
+[ OK ] ov_SC03_023
+[ OK ] ov_SC03_024
+[ OK ] ov_SC03_089
+[ OK ] ov_SC03_031
+[ OK ] ov_SC03_014
+[ OK ] ov_SC03_090
+[ OK ] ov_SC03_029
+[ OK ] ov_SC03_092
+[ OK ] ov_SC03_095
+[ OK ] ov_SC03_015
+[ OK ] ov_SC03_028
+[ OK ] ov_SC03_030
+[ OK ] ov_SC03_091
+[ OK ] ov_SC03_093
+[ OK ] ov_SC03_096
+[ OK ] ov_SC03_094
+[ OK ] ov_SC03_097
+[ OK ] ov_SC03_101
+[ OK ] ov_SC03_098
+[ OK ] ov_SC03_109
+[ OK ] ov_SC03_108
+[ OK ] ov_SC03_099
+[ OK ] ov_SC03_110
+[ OK ] ov_SC03_102
+[ OK ] ov_SC03_113
+[ OK ] ov_SC03_115
+[ OK ] ov_SC03_100
+[ OK ] ov_SC03_104
+[ OK ] ov_SC03_112
+[ OK ] ov_SC03_103
+[ OK ] ov_SC03_105
+[ OK ] ov_SC03_111
+[ OK ] ov_SC03_114
+[ OK ] ov_SC03_116
+[ OK ] ov_SC03_126
+[ OK ] ov_SC04_003
+[ OK ] ov_SC04_008
+[ OK ] ov_SC03_121
+[ OK ] ov_SC04_006
+[ OK ] ov_SC04_009
+[ OK ] ov_SC03_117
+[ OK ] ov_SC03_118
+[ OK ] ov_SC04_004
+[ OK ] ov_SC03_119
+[ OK ] ov_SC04_002
+[ OK ] ov_SC04_005
+[ OK ] ov_SC03_125
+[ OK ] ov_SC04_007
+[ OK ] ov_SC04_010
+[ OK ] ov_SC03_124
+[ OK ] ov_SC04_012
+[ OK ] ov_SC04_021
+[ OK ] ov_SC05_002
+[ OK ] ov_SC04_016
+[ OK ] ov_SC05_006
+[ OK ] ov_SC05_004
+[ OK ] ov_SC05_003
+[ OK ] ov_SC05_001
+[ OK ] ov_SC05_007
+[ OK ] ov_SC05_009
+[ OK ] ov_SC04_020
+[ OK ] ov_SC04_015
+[ OK ] ov_SC05_008
+[ OK ] ov_SC05_005
+[ OK ] ov_SC04_011
+[ OK ] ov_SC05_011
+[ OK ] ov_SC05_010
+[ OK ] ov_SC05_019
+[ OK ] ov_SC06_015
+[ OK ] ov_SC06_013
+[ OK ] ov_SC06_008
+[ OK ] ov_SC06_014
+[ OK ] ov_SC06_011
+[ OK ] ov_SC06_016
+[ OK ] ov_SC06_010
+[ OK ] ov_SC06_020
+[ OK ] ov_SC05_017
+[ OK ] ov_SC05_018
+[ OK ] ov_SC06_018
+[ OK ] ov_SC06_027
+[ OK ] ov_SC06_022
+[ OK ] ov_SC06_006
+[ OK ] ov_SC06_025
+[ OK ] ov_SC07_008
+[ OK ] md_MAIN_013
+[ OK ] ov_SC07_002
+[ OK ] ov_SC06_024
+[ OK ] md_MAIN_014
+[ OK ] ov_SC07_001
+[ OK ] ov_SC06_030
+[ OK ] md_MAIN_016
+[ OK ] md_MAIN_015
+[ OK ] md_MAIN_017
+[ OK ] md_MAIN_018
+[ OK ] md_MAIN_021
+[ OK ] md_MAIN_019
+[ OK ] md_MAIN_020
+[ OK ] md_MAIN_022
+[ OK ] ov_SC07_009
+[ OK ] md_MAIN_023
+[ OK ] md_MAIN_024
+[ OK ] md_MAIN_026
+[ OK ] md_MAIN_025
+[ OK ] md_MAIN_027
+[ OK ] md_MAIN_028
+[ OK ] ov_MAIN_012
+[ OK ] md_MAIN_030
+[ OK ] md_MAIN_029
+[ OK ] md_MAIN_031
+[ OK ] ov_SC06_032
+[ OK ] ov_SC06_033
+[ OK ] md_MAIN_032
+[ OK ] ov_SC06_029
+[ OK ] md_MAIN_033
+[ OK ] ov_SC07_011
+[ OK ] md_MAIN_035
+[ OK ] md_MAIN_034
+[ OK ] md_MAIN_037
+[ OK ] md_MAIN_036
+[ OK ] md_MAIN_040
+[ OK ] md_MAIN_039
+[ OK ] md_MAIN_038
+[ OK ] md_MAIN_041
+[ OK ] md_MAIN_042
+[ OK ] md_MAIN_043
+[ OK ] md_MAIN_044
+[ OK ] md_MAIN_045
+[ OK ] md_MAIN_047
+[ OK ] md_MAIN_046
+[ OK ] md_MAIN_008
+[ OK ] md_MAIN_011
+[ OK ] md_MAIN_001
+[ OK ] md_SC03_074
+[ OK ] md_SC03_078
+[ OK ] md_SC03_073
+[ OK ] ov_SC03_107
+[ OK ] md_SC03_075
+[ OK ] md_SC03_077
+[ OK ] ov_SC07_010
+[ OK ] md_SC03_076
+[ OK ] ov_SC07_007
+[ OK ] md_SC03_132
+[ OK ] md_SC03_079
+[ OK ] md_SC03_137
+[ OK ] md_SC03_133
+[ OK ] md_SC03_134
+[ OK ] md_SC03_136
+[ OK ] md_SC03_135
+[ OK ] md_SC04_026
+[ OK ] md_SC04_024
+[ OK ] md_SC04_025
+[ OK ] md_MAIN_003
+[ OK ] md_SC03_138
+[ OK ] md_SC04_028
+[ OK ] md_SC04_027
+[ OK ] md_SC04_029
+[ OK ] md_SC05_023
+[ OK ] md_SC05_028
+[ OK ] md_MAIN_009
+[ OK ] md_SC05_024
+[ OK ] md_SC04_030
+[ OK ] md_SC05_025
+[ OK ] md_MAIN_007
+[ OK ] md_SC03_053
+[ OK ] md_SC05_026
+[ OK ] md_SC05_027
+[ OK ] md_SC05_029
+[ OK ] md_SC03_054
+[ OK ] md_SC03_056
+[ OK ] ov_SC02_037
+[ OK ] md_SC02_009
+[ OK ] ov_SC07_006
+[ OK ] md_SC07_004
+[ OK ] md_SC07_003
+extract-all: 217 extracted, 0 failed of 217 (+ main, serial)
+[ OK ] resident
+[ OK ] ov_SC01_000
+[ OK ] ov_SC05_000
+[ OK ] ov_SC04_000
+[ OK ] ov_SC01_005
+[ OK ] ov_SC01_006
+[ OK ] ov_SC01_001
+[ OK ] ov_SC03_002
+[ OK ] ov_SC03_006
+[ OK ] ov_SC06_000
+[ OK ] ov_SC04_018
+[ OK ] ov_SC01_077
+[ OK ] ov_SC04_019
+[ OK ] ov_SC02_000
+[ OK ] ov_SC03_001
+[ OK ] ov_SC02_003
+[ OK ] ov_SC01_004
+[ OK ] ov_SC01_074
+[ OK ] ov_SC07_000
+[ OK ] ov_SC01_008
+[ OK ] ov_SC01_080
+[ OK ] ov_SC02_004
+[ OK ] ov_SC01_009
+[ OK ] ov_SC02_015
+[ OK ] ov_SC01_084
+[ OK ] ov_SC02_016
+[ OK ] ov_SC02_021
+[ OK ] ov_SC02_017
+[ OK ] ov_SC02_026
+[ OK ] ov_SC02_011
+[ OK ] ov_SC02_005
+[ OK ] ov_SC02_031
+[ OK ] ov_SC02_039
+[ OK ] ov_SC02_027
+[ OK ] ov_SC03_003
+[ OK ] ov_SC02_041
+[ OK ] ov_SC02_035
+[ OK ] ov_SC02_028
+[ OK ] ov_SC03_010
+[ OK ] ov_SC03_007
+[ OK ] ov_SC03_012
+[ OK ] ov_SC03_011
+[ OK ] ov_SC03_023
+[ OK ] ov_SC03_013
+[ OK ] ov_SC03_014
+[ OK ] ov_SC03_015
+[ OK ] ov_SC03_024
+[ OK ] ov_SC03_030
+[ OK ] ov_SC03_031
+[ OK ] ov_SC03_029
+[ OK ] ov_SC03_089
+[ OK ] ov_SC03_028
+[ OK ] main
+[ OK ] ov_SC03_092
+[ OK ] ov_SC03_090
+[ OK ] ov_SC03_093
+[ OK ] ov_SC03_095
+[ OK ] ov_SC03_091
+[ OK ] ov_SC03_094
+[ OK ] ov_SC03_096
+[ OK ] ov_SC03_097
+[ OK ] ov_SC03_098
+[ OK ] ov_SC03_099
+[ OK ] ov_SC03_101
+[ OK ] ov_SC03_100
+[ OK ] ov_SC03_109
+[ OK ] ov_SC03_102
+[ OK ] ov_SC03_108
+[ OK ] ov_SC03_103
+[ OK ] ov_SC03_110
+[ OK ] ov_SC03_111
+[ OK ] ov_SC03_114
+[ OK ] ov_SC03_104
+[ OK ] ov_SC03_113
+[ OK ] ov_SC03_112
+[ OK ] ov_SC03_105
+[ OK ] ov_SC03_115
+[ OK ] ov_SC03_116
+[ OK ] ov_SC03_117
+[ OK ] ov_SC03_118
+[ OK ] ov_SC03_121
+[ OK ] ov_SC03_126
+[ OK ] ov_SC03_119
+[ OK ] ov_SC03_125
+[ OK ] ov_SC04_006
+[ OK ] ov_SC04_003
+[ OK ] ov_SC04_004
+[ OK ] ov_SC04_008
+[ OK ] ov_SC04_002
+[ OK ] ov_SC03_124
+[ OK ] ov_SC04_005
+[ OK ] ov_SC04_007
+[ OK ] ov_SC04_009
+[ OK ] ov_SC04_010
+[ OK ] ov_SC04_012
+[ OK ] ov_SC04_016
+[ OK ] ov_SC04_021
+[ OK ] ov_SC04_015
+[ OK ] ov_SC04_020
+[ OK ] ov_SC05_002
+[ OK ] ov_SC04_011
+[ OK ] ov_SC05_006
+[ OK ] ov_SC05_004
+[ OK ] ov_SC05_003
+[ OK ] ov_SC05_005
+[ OK ] ov_SC05_001
+[ OK ] ov_SC05_007
+[ OK ] ov_SC05_009
+[ OK ] ov_SC05_008
+[ OK ] ov_SC05_010
+[ OK ] ov_SC05_011
+[ OK ] ov_SC05_019
+[ OK ] ov_SC06_010
+[ OK ] ov_SC06_011
+[ OK ] ov_SC06_008
+[ OK ] ov_SC05_018
+[ OK ] ov_SC06_015
+[ OK ] ov_SC06_014
+[ OK ] ov_SC06_013
+[ OK ] ov_SC06_006
+[ OK ] ov_SC06_016
+[ OK ] ov_SC06_020
+[ OK ] ov_SC05_017
+[ OK ] ov_SC06_022
+[ OK ] ov_SC06_018
+[ OK ] ov_SC06_024
+[ OK ] ov_SC06_025
+[ OK ] ov_SC06_027
+[ OK ] md_MAIN_013
+[ OK ] md_MAIN_014
+[ OK ] ov_SC07_008
+[ OK ] ov_SC07_009
+[ OK ] md_MAIN_015
+[ OK ] md_MAIN_016
+[ OK ] ov_SC07_001
+[ OK ] md_MAIN_017
+[ OK ] md_MAIN_018
+[ OK ] md_MAIN_019
+[ OK ] ov_SC06_030
+[ OK ] md_MAIN_020
+[ OK ] md_MAIN_021
+[ OK ] md_MAIN_022
+[ OK ] ov_SC07_002
+[ OK ] md_MAIN_023
+[ OK ] md_MAIN_024
+[ OK ] md_MAIN_025
+[ OK ] md_MAIN_027
+[ OK ] md_MAIN_026
+[ OK ] md_MAIN_028
+[ OK ] md_MAIN_029
+[ OK ] md_MAIN_030
+[ OK ] ov_SC07_007
+[ OK ] ov_SC06_029
+[ OK ] md_MAIN_032
+[ OK ] md_MAIN_031
+[ OK ] md_MAIN_033
+[ OK ] md_MAIN_034
+[ OK ] ov_SC07_010
+[ OK ] md_MAIN_035
+[ OK ] md_MAIN_036
+[ OK ] md_MAIN_037
+[ OK ] md_MAIN_038
+[ OK ] md_MAIN_039
+[ OK ] md_MAIN_042
+[ OK ] md_MAIN_040
+[ OK ] ov_SC07_006
+[ OK ] md_MAIN_043
+[ OK ] md_MAIN_041
+[ OK ] md_MAIN_044
+[ OK ] md_MAIN_045
+[ OK ] md_MAIN_047
+[ OK ] md_MAIN_008
+[ OK ] md_MAIN_046
+[ OK ] md_MAIN_001
+[ OK ] ov_MAIN_012
+[ OK ] md_MAIN_011
+[ OK ] ov_SC07_011
+[ OK ] md_SC03_073
+[ OK ] md_SC03_074
+[ OK ] ov_SC06_032
+[ OK ] md_SC03_078
+[ OK ] md_SC03_079
+[ OK ] md_SC03_075
+[ OK ] md_SC03_132
+[ OK ] md_SC03_077
+[ OK ] md_SC03_133
+[ OK ] md_SC03_134
+[ OK ] ov_SC06_033
+[ OK ] md_SC03_076
+[ OK ] md_SC07_003
+[ OK ] md_SC03_137
+[ OK ] md_SC04_024
+[ OK ] md_SC03_138
+[ OK ] md_SC04_025
+[ OK ] md_SC03_135
+[ OK ] md_MAIN_003
+[ OK ] md_SC04_026
+[ OK ] md_SC03_136
+[ OK ] md_SC04_029
+[ OK ] md_SC04_030
+[ OK ] md_SC05_023
+[ OK ] md_SC05_024
+[ OK ] md_SC04_028
+[ OK ] md_SC05_025
+[ OK ] md_SC04_027
+[ OK ] md_SC05_028
+[ OK ] md_MAIN_007
+[ OK ] md_SC05_029
+[ OK ] md_SC02_009
+[ OK ] md_SC05_027
+[ OK ] md_MAIN_009
+[ OK ] md_SC07_004
+[ OK ] md_SC03_053
+[ OK ] md_SC03_054
+[ OK ] md_SC03_056
+[ OK ] md_SC05_026
+[ OK ] ov_SC02_037
+[ OK ] ov_SC03_107
+check-all: 218 passed, 0 failed of 218
+wall=88.01 s
+exit=0
diff --git a/.run/P37/restruct/apply_t4_sig11b.log b/.run/P37/restruct/apply_t4_sig11b.log
new file mode 100644
index 0000000000..afa25a9d12
--- /dev/null
+++ b/.run/P37/restruct/apply_t4_sig11b.log
@@ -0,0 +1,3 @@
+18:40:52 signature func_8017FC5C: `s32 * func_8017FC5C(s32 *a0, s32 a1, s32 a2)` — 1 definition(s) in ['src/ov_SC03_115/ov_SC03_115_jr_8017BEBC.c'], 3 declarations in 0 other files
+18:40:53 signature func_8017FC5C: IDENTICAL on every recipe (1 objects, 0.1 s) — 1 files written
+18:40:53 restruct: signature func_8017FC5C — IDENTICAL · 1 files written
diff --git a/.run/P37/restruct/calibrate_t4_sig11b.log b/.run/P37/restruct/calibrate_t4_sig11b.log
new file mode 100644
index 0000000000..e0b1f18189
--- /dev/null
+++ b/.run/P37/restruct/calibrate_t4_sig11b.log
@@ -0,0 +1,5 @@
+delever_oracle --calibrate main md_SC07_004 ov_SC03_015 ov_SC04_011: 146/146 objects byte-identical untouched; twin checks 32 (0 mismatch); positive control DIFFERS on build/src/800.o; 2.2 s — OK
+   main           85/85 identical, mean 0.089 s per object
+   md_SC07_004    1/1 identical, mean 0.568 s per object
+   ov_SC03_015    32/32 identical, mean 0.159 s per object
+   ov_SC04_011    28/28 identical, mean 0.154 s per object
diff --git a/.run/P37/restruct/cycle_t4sig3.log b/.run/P37/restruct/cycle_t4sig3.log
index 1c649e5f35..e76f1497a9 100644
--- a/.run/P37/restruct/cycle_t4sig3.log
+++ b/.run/P37/restruct/cycle_t4sig3.log
@@ -5,3 +5,5 @@ cycle: t4_sig2b committed d27072afc — restruct: signature func_80029D3C — CO
 log: t4_sig8b
 cycle: t4_sig8b committed 32e170941 — restruct: signature func_80188A30 — IDENTICAL · 1 files written | check-all: 218 passed, 0 failed of 218
 log: t4_sig7b
+cycle: t4_sig7b committed f4ac36ccf — restruct: signature func_80188DF4 — IDENTICAL · 1 files written | check-all: 218 passed, 0 failed of 218
+log: t4_sig11b
diff --git a/.run/P37/restruct/ledger.jsonl b/.run/P37/restruct/ledger.jsonl
index c3e1300a07..d0bf3aa6ac 100644
--- a/.run/P37/restruct/ledger.jsonl
+++ b/.run/P37/restruct/ledger.jsonl
@@ -150069,3 +150069,4 @@
 {"ts": "2026-09-12 18:34:00", "label": "t4_sig2b", "rung": "D", "calib": {"head": "1f11a183d", "stamp": "e34b6679685f"}, "tu": "src/shared/ov/func_80181538__27797037.h", "unit": "def:func_80029D3C", "callee": "func_80029D3C", "signature": "s32 func_80029D3C(s32 n)", "definition": false, "verdict": "REFUSED", "err": "src/ov_MAIN_012/../shared/ov/func_8015126C.h:117: too few arguments to function `func_80029D3C'\nsrc/ov_MAIN_012/../shared/ov/func_80151780.h:24: too few arguments to function `func_80029D3C'\n{standard", "nhash_before": null, "nhash_after": null, "sites": []}
 {"ts": "2026-09-12 18:35:36", "label": "t4_sig8b", "rung": "D", "calib": {"head": "d27072afc", "stamp": "e34b6679685f"}, "tu": "src/ov_SC04_011/ov_SC04_011_jr_8017D494.c", "unit": "def:func_80188A30", "callee": "func_80188A30", "signature": "s32 func_80188A30(s32 a0)", "definition": true, "verdict": "DECL-CANON", "err": "", "nhash_before": null, "nhash_after": null, "sites": []}
 {"ts": "2026-09-12 18:38:18", "label": "t4_sig7b", "rung": "D", "calib": {"head": "32e170941", "stamp": "e34b6679685f"}, "tu": "src/ov_SC03_091/ov_SC03_091_jr_8018326C.c", "unit": "def:func_80188DF4", "callee": "func_80188DF4", "signature": "s32 func_80188DF4(s32 a0)", "definition": true, "verdict": "DECL-CANON", "err": "", "nhash_before": null, "nhash_after": null, "sites": []}
+{"ts": "2026-09-12 18:40:53", "label": "t4_sig11b", "rung": "D", "calib": {"head": "f4ac36ccf", "stamp": "e34b6679685f"}, "tu": "src/ov_SC03_115/ov_SC03_115_jr_8017BEBC.c", "unit": "def:func_8017FC5C", "callee": "func_8017FC5C", "signature": "s32 * func_8017FC5C(s32 *a0, s32 a1, s32 a2)", "definition": true, "verdict": "DECL-CANON", "err": "", "nhash_before": null, "nhash_after": null, "sites": []}
diff --git a/.run/P37/restruct/run_t4_sig11b.log b/.run/P37/restruct/run_t4_sig11b.log
new file mode 100644
index 0000000000..30eb94dee0
--- /dev/null
+++ b/.run/P37/restruct/run_t4_sig11b.log
@@ -0,0 +1,5 @@
+18:40:52 signature func_8017FC5C: `s32 * func_8017FC5C(s32 *a0, s32 a1, s32 a2)` — 1 definition(s) in ['src/ov_SC03_115/ov_SC03_115_jr_8017BEBC.c'], 3 declarations in 0 other files
+18:40:53 signature func_8017FC5C: IDENTICAL on every recipe (1 objects, 0.1 s) — 1 files written
+18:40:53 restruct: signature func_8017FC5C — IDENTICAL · 1 files written
+t4_sig11b wall=47.43 s
+exit=0
diff --git a/.run/P37/restruct/snapshot_t4_sig11b.log b/.run/P37/restruct/snapshot_t4_sig11b.log
new file mode 100644
index 0000000000..b012627191
--- /dev/null
+++ b/.run/P37/restruct/snapshot_t4_sig11b.log
@@ -0,0 +1 @@
+delever_oracle --snapshot-baseline: 7428 object(s) under .run/P36/delever/baseline at f4ac36ccf; link inputs for 218/218 binaries under .run/P36/delever/baseline/_link (links.json)
diff --git a/phase-ends/CURRENT_PHASE.md b/phase-ends/CURRENT_PHASE.md
index e2b75ac23f..b280a23548 100644
--- a/phase-ends/CURRENT_PHASE.md
+++ b/phase-ends/CURRENT_PHASE.md
@@ -619,7 +619,9 @@ bucketed by what each bucket needs before any plan is proposed. **Candidates for
 
 - **2026-09-12 — T4 step (d) `t4_sig7b`** (`restruct --apply --rung D --callee func_80188DF4 --body $A/ov_SC03_091__func_80188DF4/body.c --tu src/ov_SC03_091/ov_SC03_091_jr_8018326C.c`; `.run/P37/restruct/run_t4_sig7b.log`): `restruct: signature func_80188DF4 — IDENTICAL · 1 files written` → R22 (`.run/P37/baseline/r22_t4_sig7b.log`) **`check-all: 218 passed, 0 failed of 218`** (`wall=93.00 s`).
 
-## 🛑 SESSION CHECKPOINT — S107 (2026-09-12, FINAL — written for a FRESH session at 84 % context; the session's last commit follows this): gate 1 APPROVED, **T0 ☑ T1 ☑ T2 ☑ T3 ☑ — T4 IN PROGRESS (☐)** — 🛑 **T4 NEXT: resume the declaration layer where the cycle stopped (below, §1 "T4 — where it stands and the exact next commands"); xHigh** | R22 `check-all: 218 passed, 0 failed of 218` at `f2b58011e` (every one of the 21 T4 commits carries its own) | HEAD after this commit is the checkpoint's commit; tree clean; nothing pushed after `79b2f6f15` (Drew pushes, R6) | last batch `t4_sig7b` on 32e170941: restruct: signature func_80188DF4 — IDENTICAL · 1 files written
+- **2026-09-12 — T4 step (d) `t4_sig11b`** (`restruct --apply --rung D --callee func_8017FC5C --body $A/ov_SC03_115__func_8017FC5C/body.c --tu src/ov_SC03_115/ov_SC03_115_jr_8017BEBC.c`; `.run/P37/restruct/run_t4_sig11b.log`): `restruct: signature func_8017FC5C — IDENTICAL · 1 files written` → R22 (`.run/P37/baseline/r22_t4_sig11b.log`) **`check-all: 218 passed, 0 failed of 218`** (`wall=88.01 s`).
+
+## 🛑 SESSION CHECKPOINT — S107 (2026-09-12, FINAL — written for a FRESH session at 84 % context; the session's last commit follows this): gate 1 APPROVED, **T0 ☑ T1 ☑ T2 ☑ T3 ☑ — T4 IN PROGRESS (☐)** — 🛑 **T4 NEXT: resume the declaration layer where the cycle stopped (below, §1 "T4 — where it stands and the exact next commands"); xHigh** | R22 `check-all: 218 passed, 0 failed of 218` at `f2b58011e` (every one of the 21 T4 commits carries its own) | HEAD after this commit is the checkpoint's commit; tree clean; nothing pushed after `79b2f6f15` (Drew pushes, R6) | last batch `t4_sig11b` on f4ac36ccf: restruct: signature func_8017FC5C — IDENTICAL · 1 files written
 
 **Replay this block into the chat at the next session start (R64); it is the ONLY in-phase context the next session inherits. Everything below
 is what S107 knew and the next session must not re-derive.** **The checkpoint procedure (every session end, Drew 2026-09-12):** bank the
diff --git a/src/ov_SC03_115/ov_SC03_115_jr_8017BEBC.c b/src/ov_SC03_115/ov_SC03_115_jr_8017BEBC.c
index da4e63107d..4086ad6c01 100644
--- a/src/ov_SC03_115/ov_SC03_115_jr_8017BEBC.c
+++ b/src/ov_SC03_115/ov_SC03_115_jr_8017BEBC.c
@@ -4687,7 +4687,7 @@ void func_8017F188(void *a0) {
 
 
 
-extern void func_8017FC5C(s32 *a0, s32 a1, s32 a2);
+extern s32 * func_8017FC5C(s32 *a0, s32 a1, s32 a2);
 extern s32 func_8012B608(s32 a0, s32 a1, s32 a2);
 extern void func_8012B178(s32 a0, s32 a1);
 extern void func_8012CBF4(s32 a0);
@@ -4836,7 +4836,7 @@ extern void func_8012B0B4(unsigned int *param_1, int param_2, int param_3);
 /* Declarations conformed VERBATIM to the TU's existing ones
  * (ov_SC02_035_jr_8017BEBC.c:5139 and :5117) — type disagreements are
  * pushed to casts at the use sites below. Zero codegen change. */
-extern void func_8017FC5C(s32 *a0, s32 a1, s32 a2);
+extern s32 * func_8017FC5C(s32 *a0, s32 a1, s32 a2);
 extern void func_8012B200(void *a0);
 extern void func_8012B2CC(s32 a0);
 extern void func_8012B178(s32 a0, s32 a1);
@@ -4869,7 +4869,7 @@ void func_8017F808(s32 a0) {
 
 
 
-extern void func_8017FC5C(s32 *a0, s32 a1, s32 a2);
+extern s32 * func_8017FC5C(s32 *a0, s32 a1, s32 a2);
 extern s32 func_8012B8E4(s32 a0, s32 a1);
 extern s32 func_8012BEE8(s32 a0);
 extern void func_8012CBF4(s32 a0);
@@ -5035,15 +5035,15 @@ extern s32 func_8012D5E4(s32 a0, s32 a1, s32 a2, s32 a3);
  * exactly the same 10 diagnostics as the unmodified TU (zero new). */
 extern s32 func_8012B77C(s32 out, s32 from, s32 to);
 
-void func_8017FC5C(s32 *a0, s32 a1, s32 a2) {
+s32 *func_8017FC5C(s32 *a0, s32 a1, s32 a2) {
 
     extern s16 D_80126CBA;
+    extern void fV(s32 out, s32 from, s32 to) __asm__("func_8012B77C");
     s32 sp10[4];
     s32 sp20;
     s16 *q;
     u16 *p;
     s16 t;
-    register s32 rv __asm__("$2");  // !FAKE: pin $2 — NEEDED DIFFERS (P36 rung B tus8)
 
     q = &D_80126CBA;
     if (*q == 0) {
@@ -5058,11 +5058,9 @@ void func_8017FC5C(s32 *a0, s32 a1, s32 a2) {
     *(s16 *)((s32)sp10 + 0x6) = t;
     *(s16 *)(a1 + 0x100) = t;
     *(s16 *)((s32)sp10 + 0xA) = p[2] + *(u16 *)(a2 + 4);
-    func_8012B77C((s32)&sp20, a1 + 4, (s32)sp10);
-    rv = sp20;
-    *a0 = rv;
-    rv = (s32)a0;
-    __asm__ __volatile__("" : : "r" (rv));  // !FAKE: keepalive — NEEDED DIFFERS (P36 rung B tus8)
+    fV((s32)&sp20, a1 + 4, (s32)sp10);
+    *a0 = sp20;
+    return a0;
 }