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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/strings.md

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+# Bowed strings (sounding pitch)
+
+| Instrument | Open strings | Comfortable | Avoid | Idiom |
+| --- | --- | --- | --- | --- |
+| violin | G3, D4, A4, E5 | G3 to E6 | above A6 for anything but a peak; double stops in fast sixteenths | melodies, fast scales and arpeggios, double stops in thirds and sixths |
+| viola | C3, G3, D4, A4 | C3 to C5 | above E5 for extended lines | inner voices, warm melodies, countermelodies |
+| cello | C2, G2, D3, A3 | C2 to G4 | above C5 for extended lines | bass lines, tenor melodies on the A string, arpeggiated accompaniment |
+| contrabass | E1, A1, D2, G2 | E1 to G3 | fast sixteenths; large shifts at speed | roots and fifths, walking bass in quarters, pizzicato or bowed pedal notes |
+| strings (ensemble) | | C2 to C7 | dense chords in one octave | pads in half and whole notes, unison melodies, tremolo-style repeated notes |
+
+## Idiom
+
+- String crossings: a fast passage should move between adjacent strings.
+  A leap from the G string to the E string on the violin needs a longer note
+  before it.
+- Double stops on adjacent strings only. Thirds, sixths and octaves in first
+  position are common; tenths and fast double stops are advanced.
+- Open strings ring: use them as drones and pedal notes in folk idioms.
+- Bowing implies phrasing: long notes and slurred groups of two to four
+  notes; a line of separate eighths reads as detached.
+- Cello above the A string open note (A3) sings; use it for melodies, not
+  only bass lines.
+- Contrabass moves slowly. Quarter-note walking is the fastest idiom except
+  for short fills; shifts above the octave are rare.
+
+## String quartet
+
+- Violin 1 carries the melody, violin 2 a third or sixth below or a
+  countermelody, viola the inner voice or rhythmic figure, cello the bass.
+- Do not have all four instruments change notes on the same beat for a
+  whole example; stagger the motion.
+- Keep at least a fifth between cello and viola in the low register.
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