https://app.fretengine.com/ 2026-02-08 weekly 1.0 https://app.fretengine.com/screenshots/og-card.png fretengine social card — interactive guitar fretboard with chord and scale overlays Branded social preview showing fretengine's interactive fretboard visualization https://app.fretengine.com/screenshots/fretboard-notes.png fretengine guitar fretboard visualization with chord and scale overlays Interactive guitar fretboard showing chord and scale layers to visualize music theory connections https://app.fretengine.com/screenshots/fretboard-interval.png Guitar fretboard showing interval patterns Understand chord and scale construction with interval display mode https://app.fretengine.com/screenshots/fretboard-fingering.png Guitar chord fingering positions See suggested finger positions for chords and scales https://app.fretengine.com/llms.txt 2026-02-08 monthly 0.5 https://app.fretengine.com/llms-full.txt 2026-02-08 monthly 0.5