AKIKO — SELECTED PIXEL ART, 2026-11-02

Sixteen explicitly allowlisted images were visually reviewed at native resolution.
This is a curated subset, not a complete extraction. Other image files, the game
program, dialogue, and disk images are not part of this public package.

Version 1.1 expands the original eight-image set with eight more reviewed files:
AK50 (school office), AK46 (entrance), AK47 (tennis courts), AK48 (lobby), AK49
(bedroom), AK04 (classroom), AK11 (gymnastics practice), and AKIKO (title).
The backgrounds are original complete images; some contain clothed people.
No character removal, invented room detail, or scene reconstruction was applied.

Method: strict, bounded GPC decode using four bitplanes, horizontal/vertical XOR
restoration and row interleaving. The embedded palette stores 4-bit red at bits
4–7, green at 8–11 and blue at 0–3; components are expanded by multiplication by
17. Indexed PNG exports retain native geometry and palette with no retouching,
resampling, transparency substitution, or AI-generated content. Source drawing
offsets are recorded in manifest.json; these standalone exports are not full
game-screen captures. PNGs are static; original animation/timing is not restored.

Use: Python 3 and Pillow. Run:
  python decode_gpc.py selected-gpc/AK01.GPC output.png
Run decoder-checks.py for independently constructed palette/geometry/interleave
fixtures plus rejected malformed input. All approved files consume their entire
compressed stream, have native dimensions, and use at most 16 colors.

Decoder adapted from lime-juice, Copyright (C) 2026 Fuzion:
https://github.com/FuzionCD/lime-juice
Revision dc00362a0d7e9f52931040119080b1435d26724a.
Upstream credits morkt / GARBro for its decoder and Tomyun's Juice.
decode_gpc.py is GPL-3.0-or-later, with no warranty. See GPL-3.0.txt.
The referenced upstream source files are included under upstream-reference/.
Python adaptation and bounded-input validation: COSOM preservation project, 2026.

The original 1993 artwork belongs to its respective creators. The software
license applies to the decoder, not to the original game assets. The displayed
English image labels are editorial descriptions, not character identifications
or a translation. The supplied disk inputs remain untouched.