What problem does it solve? Choosing a chord progression that fits a specific mood or section is slow and generative models default to the same overused loops. This Skill provides a lookup library of named progressions, a mood reverse-lookup table, variation techniques, and a warning list of over-defaulted progressions. ## Core Features & Use Cases - Mood Reverse-Lookup: Find a progression by target emotion (bright, setsunasa, urban, melancholy, epic, danceable) with degree and letter notation in Key=C/Am. - Eight Famous Named Progressions: Royal Road (4536), Canon, Komuro (6451), Maru-sa (4361), pop-punk (1564), cyclic (1625), reverse-cyclic (2516), and Dorikamu, each with variants and effects. - Eight Variation Techniques: Change starting chord, seventh/add9 voicings, secondary dominants, slash-chord bass lines, sus4 insertion, two-five splits, bar-count splicing, and parallel-minor borrowing. - Cliché Warning List: Flags progressions generative models default to (1564, 6415, 1645, 4536) with three countermeasures including harmonic rhythm changes. - Use Case: Ask for a progression that feels urban and emo for a chorus; the Skill returns the Maru-sa progression F-E7-Am-C, suggests a four-on-the-floor dance variant, and maps it into ARR-SPEC harmony fields transposed to your song key. ## Quick Start Ask the agent to give you a chord progression for a wistful J-POP chorus and check whether it is too clichéd.
