{
"id": "169",
"prompt": "A Droste cartridge published as \"mirror\" that embeds ITSELF: spawn_module(\"mirror\", w/4, h/4, w/2, h/2) latched once in state slots. host::compose is recursive - each child owns its own compose table - and the fractal ends at the host's depth cap, where spawn returns a NEGATIVE handle: when it does, print DEPTH CAP REACHED instead of polling status. Draw a pulsing border and a title so every nesting level is visible.",
"solution_rl": "fn frame(t: i32) {\n let w: i32 = host::display::width();\n let h: i32 = host::display::height();\n let c: i32 = 40 + (t % 60) * 3;\n host::display::clear(0x000000);\n host::display::fill_rect(0, 0, w, 24, c * 65536);\n host::display::fill_rect(0, h - 24, w, 24, c * 65536);\n host::display::fill_rect(0, 0, 24, h, c * 65536);\n host::display::fill_rect(w - 24, 0, 24, h, c * 65536);\n host::display::draw_string(36, 36, \"MIRROR\", 0xffffff, 2);\n if host::display::state_get(0) == 0 {\n host::display::state_set(0, 1);\n host::display::state_set(1, host::compose::spawn_module(\"mirror\", w / 4, h / 4, w / 2, h / 2));\n }\n let hdl: i32 = host::display::state_get(1);\n if hdl < 0 {\n host::display::draw_string(36, h - 48, \"DEPTH CAP REACHED\", 0xffff00, 1);\n } else {\n let st: i32 = host::compose::status(hdl);\n if st == 0 { host::display::draw_string(36, h - 48, \"NESTING...\", 0x808080, 1); }\n if st == 2 { host::display::draw_string(36, h - 48, \"CHILD REFUSED\", 0xff0000, 1); }\n }\n host::display::present();\n}\n",
"tags": [
"compose",
"state",
"animation"
]
}