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Update to Music Block

Snapshot Oct 6, 2026 · 00:02 UTC · version 1.2.0

WHAT CHANGED · RULE-BASED ANALYSIS

Package or technical metadata updated

Package contents changed in 23 files: .codex-plugin/plugin.json, skills/ensemble-arranging/SKILL.md, skills/ensemble-arranging/agents/openai.yaml, …. Open the file diff to inspect the edits.

Observed in package metadata. These changes alone do not establish a new customer-facing feature.

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Changed files

.codex-plugin/plugin.json →

skills/ensemble-arranging/SKILL.md →

skills/ensemble-arranging/agents/openai.yaml →

skills/ensemble-arranging/references/choir.md →

skills/ensemble-arranging/references/folk.md →

skills/ensemble-arranging/references/jazz-horns.md →

skills/ensemble-arranging/references/rhythm-section-bands.md →

skills/ensemble-arranging/references/string-quartet.md →

skills/human-melodic-phrasing/SKILL.md →

skills/human-melodic-phrasing/agents/openai.yaml →

skills/human-melodic-phrasing/references/bebop.md →

skills/human-melodic-phrasing/references/blues.md →

skills/human-melodic-phrasing/references/pop.md →

skills/instrument-ranges-and-idioms/SKILL.md →

skills/instrument-ranges-and-idioms/agents/openai.yaml →

skills/instrument-ranges-and-idioms/references/brass.md →

skills/instrument-ranges-and-idioms/references/drums.md →

skills/instrument-ranges-and-idioms/references/piano.md →

skills/instrument-ranges-and-idioms/references/strings.md →

skills/instrument-ranges-and-idioms/references/voices.md →

skills/instrument-ranges-and-idioms/references/winds.md →

skills/playable-fretted-parts/SKILL.md →

skills/playable-fretted-parts/agents/openai.yaml →

skills/instrument-ranges-and-idioms/references/piano.md

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+# Piano, electric piano and organ (hands)
+
+## Registers
+
+| Hand | Usual region | Comments |
+| --- | --- | --- |
+| left | C2 to C4 | bass notes below C3 are single notes or octaves, not thick chords |
+| right | C4 to C6 | melody in C5 to C6 sings; above C7 only for effects |
+
+Electric piano sounds best between E1 and E7; organ between C2 and C7 and
+prefers held chords with no octave doublings.
+
+## Hands
+
+- Five notes per hand. Span an octave for anything that moves, a ninth for a
+  held chord. No hand crossing.
+- A hand stays over five to eight keys for at least a bar; shifts happen on
+  long notes or rests.
+- Both hands must have the same number of bars. Pad the quieter hand with
+  rests, not silence.
+- Chords with a wide gap between two notes in one hand (a thumb note far
+  from the rest) are fine if the total span stays within a ninth.
+
+## Left-hand patterns (pick one per example)
+
+- Root and fifth in half notes (folk, pop ballad).
+- Root-fifth-octave broken in eighths (rock, boogie).
+- Alberti bass (low, high, middle, high) in eighths (classical).
+- Stride: root or tenth on beats 1 and 3, chord on 2 and 4 (early jazz).
+- Walking quarters (jazz), roots and chord tones with one chromatic approach
+  per bar.
+- Shell voicings held for the bar (root and 7th, or 3rd and 7th) while the
+  right hand plays the melody (jazz comping).
+
+## Right hand
+
+- Melody with occasional harmony notes a third or sixth below on strong
+  beats; full chords on phrase ends.
+- Fast passages stay within a five-finger group or a scale pattern; a run of
+  sixteenths that jumps a sixth on every beat is unplayable at tempo.
+- Two-hand comping: right hand plays 3- or 4-note voicings between C4 and
+  G5, left hand roots or shells; rhythmic hits on offbeats with rests, not
+  every beat.
+
+## Avoid
+
+- Both hands in continuous sixteenths.
+- Left-hand chords of four or five notes below C3.
+- Octave runs in both hands at fast tempi.
+- Changing the left-hand pattern every bar.
Full technical diff · 24 changed fields

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