makepri.exe is a limited, closed-source command-line tool and the PRI file format is not documented. This is an attempt at making UWP resource editing possible beyond what the original tooling supports. Lots of half-baked reverse engineering notes in here for yet another project I probably will never finish. Feel free to dig into it, it's all experimental stuff for now.

resources.pri

18911528 bytes (0x01209128) checksum: 1912541329 (0x71FF1091)

6D 72 6D 5F 70 72 69 32 "mrm_pri2" (8 bytes) 00 00 01 00 28 91 20 01 total file size (18911528 bytes) 20 00 00 00 header size (32 bytes) 20 15 00 00 A8 00 FF FF checksum? 00 00 00 00

5B 6D 72 6D 5F 64 65 63 6E 5F 69 6E 66 6F 5D 00 "[mrm_decn_info]" (16 bytes) 00 00 00 00 00 00 00 00 00 00 00 00 18 11 00 00 (4376)

5B 6D 72 6D 5F 70 72 69 64 65 73 63 65 78 5D 00 "[mrm_pridescex]" (16 bytes) 00 00 00 00 00 00 00 00 18 11 00 00 (4376) 90 01 00 00 (400)

5B 6D 72 6D 5F 70 72 69 64 65 73 63 65 78 5D 00 "[mrm_pridescex]" (16 bytes) 00 00 00 00 00 00 00 00 90 01 00 00 (400) 00 00 00 00

02 00 FF FF 00 00 01 00 01 00 01 00 03 00 00 00 A4 00 00 00 02 00 00 00 03 00 04 00 05 00 06 00 07 00 08 00 09 00 0A 00 0B 00 0C 00 0D 00 0E 00 0F 00 10 00 11 00 12 00

5B 6D 72 6D 5F 68 73 63 68 65 6D 61 65 78 5D 20 "[mrm_hschemaex] " (16 bytes) 00 00 00 00 00 00 00 00 A8 12 00 00 30 D5 00 00

5B 6D 72 6D 5F 68 73 63 68 65 6D 61 65 78 5D 20 "[mrm_hschemaex] " (16 bytes) 00 00 00 00 00 00 00 00 30 D5 00 00 00 00 00 00

01 00 25 00 1A 00 00 00

5B 6D 72 6D 5F 72 65 73 5F 6D 61 70 32 5F 5D 00 "[mrm_res_map2_]" (16 bytes) 00 00 00 00 00 00 00 00 D8 E7 00 00 60 6C 01 00

5B 6D 72 6D 5F 72 65 73 5F 6D 61 70 32 5F 5D 00 "[mrm_res_map2_]" (16 bytes) 00 00 00 00 00 00 00 00 60 6C 01 00 00 00 00 00 00 00 00 00 02 00 00 00 00 00 07 00 01 00 01 00 05 04 00 00 78 2B 00 00 00 00 00 00 00 00 00 00 04 00 00 00 00 00 00 00 04 00 00 00 01 00 00 00 04 00 00 00 02 00 00 00 04 00 00 00 03 00 00 00 04 00 00 00 04 00 00 00

5B 64 65 66 5F 68 6E 61 6D 65 73 78 5D 20 20 00 "[def_hnamesx]" (16 bytes) 01 00 00 00 00 00 00 00 99 C5 BC F3 C0 01 00 00

5B 6D 72 6D 5F 64 61 74 61 69 74 65 6D 5D 20 00 "[mrm_dataitem] " (16 bytes) 00 00 00 00 00 00 00 00 38 54 02 00 (152632) E0 0A 00 00 (2784)

5B 6D 72 6D 5F 64 61 74 61 69 74 65 6D 5D 20 00 "[mrm_dataitem] " (16 bytes) 00 00 00 00 00 00 00 00 E0 0A 00 00 (2784) 00 00 00 00 (0)

5B 6D 72 6D 5F 64 65 63 6E 5F 69 6E 66 6F 5D 00 "[mrm_decn_info]" (16 bytes) 00 00 00 00 00 00 00 00 18 11 00 00 data size 00 00 00 00

offset: 0x1520 (5408), length: 0x1118 (4376)

5B 64 65 66 5F 68 6E 61 6D 65 73 78 5D 20 20 00 "[def_hnamesx]" (16 bytes) 01 00 00 00 00 00 00 00 99 C5 BC F3 C0 01 00 00 (448)

05 04 00 00 (1029) "ms-appx://Microsoft.WindowsTerminal/Microsoft.WindowsTerminal" 6D 00 73 00 2D 00 61 00 70 00 70 00 78 00 3A 00 2F 00 2F 00 4D 00 69 00 63 00 72 00 6F 00 73 00 6F 00 66 00 74 00 2E 00 57 00 69 00 6E 00 64 00 6F 00 77 00 73 00 54 00 65 00 72 00 6D 00 69 00 6E 00 61 00 6C 00 2F 00 00 00 4D 00 69 00 63 00 72 00 6F 00 73 00 6F 00 66 00 74 00 2E 00 57 00 69 00 6E 00 64 00 6F 00 77 00 73 00 54 00 65 00 72 00 6D 00 69 00 6E 00 61 00 6C 00

00 00 00 00 90 00 00 00 (144) *** C5 05 00 00 (1477) C0 01 00 00 (448)

05 04 00 00 (1029) 00 00 00 00 58 D4 00 00 (54360) *** F1 78 00 00 (30961) 00 00 00 00 00 00 00 10 00 00 00 00 00 00 05 00 46 00 05 30 1D 00 03 00 00 00 1A 00 4D 00 1A 30 ED 31 A9 01 00 00 22 00 4D 00 22 30 B9 0A 66 00 00 00 21 00 4D 00 21 30 8D 0A 64 00 00 00 25 00 4D 00 25 30 51 00 08 00 00 00 11 00 4D 00 11 30 01 00 01 00 00 00 09 00 52 00 09 30 3C 34 BD 01 00 00 0B 00 54 00 0B 30 81 00 0A 00 01 00 0D 00 41 00 07 20 59 59 BC 01 01 00 13 00 44 00 0D 20 E3 78 04 04 01 00 0C 00 49 00 06 30 46 34 BE 01 01 00 20 00 4D 00 1A 30 21 34 BC 01 01 00 28 00 4D 00 22 30 CA 31 A8 01 01 00 17 00 4D 00 11 30 23 00 04 00 01 00 11 00 4E 00 0B 20 BB 77 FB 03 01 00 12 00 50 00 0C 30 4D 34 BF 01 01 00 11 00 54 00 0B 30 81 0A 63 00 0B 00 1A 00 4C 00 0D 20 EA 76 F0 03 0B 00 1F 00 4C 00 12 20 F8 76 F1 03 0B 00 1A 00 53 00 0D 20 0B 77 F2 03 0B 00 1D 00

//

53 00 10 20 19 77 F3 03 0B 00 22 00 53 00 15 20 2A 77 F4 03 0B 00 20 00 53 00 13 20 40 77 F5 03 0B 00 1A 00 53 00 0D 20 54 77 F6 03 0B 00 19 00 54 00 0C 20 62 77 F7 03 0B 00 28 00 54 00 1B 20 6F 77 F8 03 0B 00 28 00 54 00 1B 20 8B 77 F9 03 0B 00 20 00 57 00 13 20 A7 77 FA 03 0C 00 35 00

DE FA FF DE (0xDEFFFADE) 28 91 20 01 total file size (18911528 bytes) 6D 72 6D 5F 70 72 69 32 "mrm_pri2" (8 bytes)