Workflow Test Summary: 3am Study To Suno Control Handoff

Read the live Music Generation skill before starting.
Created dated folder: `days/2026-07-28-3am-workflow-test/`.
Produced normal study findings in `study-findings.md`.
Created `composition-brief.md` before any guide JSON, MIDI, or render work.
Created `suno-control-plan.md` before finalising `suno-prompt.md`.
Let the study choose the guide type: **motif guide**.
Wrote `guide-track.json` from the composition brief.
Rendered the guide with the current arranger: `scripts/midi-arranger-v5.py`.
Ran arranger duration QA plus independent `ffprobe`, `volumedetect`, and `silencedetect` checks.
Created and checked a regenerated review clip: `guide-track-review-clip.mp3`.
Guide, prompt, lyrics, and image prompt all agree on the study object and emotional movement.

Applied after this test: `scripts/validate-suno-handoff.py` now writes `handoff-manifest.json` and `handoff-qa.md`, verifies file order, audits studied artist/reference names, regenerates the review clip, and runs duration/audible-slice QA.
Still pending: the control plan should eventually include a Suno browser execution checklist so the upload step can be tested without relying on memory.
Still pending: guide type taxonomy should be reinforced in the live Music Generation skill and revisited after more completed songs produce examples.