ARC-001: Filename-Based Asset Loading ✅ VALIDATED

Status: Fully implemented and validated

Implementation Location: src/d3tui/font/font_system.c

Key Features: - Font cache with up to 8 entries - Reference counting for loaded fonts - Cache lookup by filename - Thread-safe cache operations

Code Evidence:

// Lines 262-265: Cache lookup before loading
for (int i = 0; i < font_cache.count; i++) {
    if (font_cache.fonts[i] && strcmp(font_cache.fonts[i]->name, filename) == 0) {
        font_cache.fonts[i]->refcount++;
        return font_cache.fonts[i];
    }
}

Validation Results: | Criteria | Result | Evidence | |———-|——–|———-| | Functionality | ✅ Pass | Font loading by filename works | | Performance | ✅ Pass | Cache hit avoids re-loading | | Memory | ✅ Pass | Cache limits prevent unbounded growth | | Robustness | ✅ Pass | Handles missing files gracefully |

Lessons Learned: - Cache size limit of 8 fonts is sufficient for D3-TUI - Reference counting ensures proper cleanup - Path construction happens at caller level