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Skill Claude CodeCodex
Walks through the circle of fifths — key signatures, perfect-fifth relationships, the order of sharps and flats, and the practical use for navigation between keys. Pure catalog skill. Use when a learner asks 'explain the circle of fifths' / 'how do key signatures work' / 'why are some keys sharps and others flats'.
Skill Claude Code
Finds notes shared between TWO chords and describes their interval role in each (root / 3rd / 5th / 7th / extension). Used for pivot-chord choice, smooth voice leading, and modulation prep. Calls the deterministic domain.commonTones closure via the gadsleval MCP tool — never compute pivot tones from training data…
Skill Claude Code
Lists the seven diatonic triads of a key (root + major/minor). Calls the deterministic domain.diatonicChords closure via the gadsleval MCP tool — never recall diatonic sets from training data, since LLMs commonly mis-spell the iv/vii° in less-common keys (Gb major, F# minor).
Skill Claude Code
Computes the fret span and playability of a 6-string guitar chord diagram. Calls the deterministic gafretspan MCP tool — never recall the answer from training data, since the math depends on knowing exactly which strings are open vs muted vs fretted.
Skill Claude CodeCodex
Explains what makes a genre sound like itself — the harmonic, melodic, rhythmic, and timbral signatures of blues, jazz, pop, modal, folk, and others. Pure catalog skill. Use when a learner asks 'what makes blues blues' / 'what defines jazz harmony' / 'how do I write a country progression'.
Skill Claude Code
Computes the simple interval between two named pitches (e.g. C to G is a perfect fifth). Calls the deterministic gaintervalcompute MCP tool — never recall an answer from training data.
Skill Claude Code
Identifies the most likely musical key of a chord progression and explains why. Calls the deterministic gakeyidentify MCP tool — never recall the analysis from training data, since the diatonic-set match is pitch-class arithmetic and the LLM is unreliable at it.
Skill Claude CodeCodex
Lists the seven modes of the major scale (Ionian, Dorian, Phrygian, Lydian, Mixolydian, Aeolian, Locrian) with their scale-degree formulas and characteristic sound. Pure catalog — same fixed pedagogy whether the user asks for the whole list or a single mode.
Skill Claude CodeCodex
Suggests a structured practice routine for a stated goal — jazz comping, soloing, ear training, fingerstyle technique, etc. Pure catalog skill drawing on guitar-pedagogy templates. Use when a learner asks 'give me a practice plan for X' / 'how do I practice Y'.
Skill Claude CodeCodex
Reliable techniques for darkening or brightening a chord progression — parallel-mode swaps, modal interchange (Phrygian / Aeolian / Dorian / Lydian / Mixolydian), and borrowed-chord substitutions. Use when a learner asks how to make a progression sound darker / sadder / moodier / brighter / more uplifting.
Skill Claude Code
How any AI collaborator (Codex, Conductor, Octopus, Compound Engineering, future-Claude) works alongside the QA Architect agent on this repo. Read before designing or shipping a non-trivial change.
Skill Claude Code
Returns the seven notes of a major or minor key plus its key signature and relative key. Calls the deterministic gascalegetnotes MCP tool — never recall an answer from training data.
Skill Claude Code
Transposes a chord by a named musical interval (e.g. Cmaj7 up a perfect fourth = Fmaj7). Calls the deterministic domain.transposeChord closure via the gadsleval MCP tool — never recall transpositions from training data, since LLMs commonly produce wrong enharmonics for less-common keys (Db major vs C# major).
Skill Claude CodeCodex
The chatbot's self-disclosure / capabilities meta-skill. Lists what the chatbot can do — chord/scale lookup, progression analysis, voicing search, transposition, voice leading, etc. — with one-line examples. Pure catalog. Use when a visitor asks 'what can you do' / 'what can the chatbot do' / 'help' / 'how do I use…
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: