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

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+# Bebop and jazz phrasing
+
+## Vocabulary
+- Chord tones on downbeats, chromatic and scale passing tones between them.
+- Enclosures: approach a chord tone from a half step above and a half or
+  whole step below (or the reverse) before landing.
+- Bebop scales: add a chromatic passing tone to a 7-note scale so chord tones
+  fall on downbeats in eighth-note lines (dominant: b7 to natural 7 to root).
+- Over the V7 in a minor ii-V-i or an altered dominant: b9, #9, b13 resolving
+  down by half step into the next chord.
+- Tritone substitutions and 3-to-b9 arpeggios over dominants.
+
+## Target notes
+- ii7: 3rd and 7th.
+- V7: 3rd and b7; tensions on offbeats.
+- Imaj7: 3rd or 9th on the downbeat, 6th or major 7th as a landing colour.
+- Aim the whole line at the I chord's 3rd; everything before it is approach.
+
+## Rhythm
+- Eighth-note lines that START on an offbeat (the "and" of 1 or 4) and END on
+  an offbeat, often the "and" of 2 or 4 of the last bar, followed by rest.
+- One triplet figure per 2 to 4 bars, either a triplet eighth group or an
+  eighth-quarter-eighth grouping across a beat.
+- Set `feel` to `swing`. Write the eighths straight.
+- Phrase lengths of 2, 3 or 5 bars are common; do not chop everything into
+  even 2-bar units.
+
+## Contour
+- Long lines run 6 to 12 notes but change direction every 3 to 5 notes.
+- Angular leaps are fine when followed by stepwise motion the other way.
+- Descending lines resolve tension better than ascending ones at phrase ends.
+
+## Avoid
+- Playing the scale of each chord up from its root.
+- Landing the root on beat 1 of every chord.
+- Continuous eighths for more than 3 bars.
+- Faking swing with dotted eighths or 12/8.
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