---
phase: 04-core-track-production
plan: 02
subsystem: skills
tags: [suno, lyrics, style-prompt, metatags, verification, production-brief, discography]

# Dependency graph
requires:
  - phase: 03-artist-data-structure
    provides: Song structure templates (pop, rap, ballad, rock, electronic) with Section Flow and metatag guidance
  - phase: 01-foundation
    provides: Suno format reference (format.md), glossary, CLAUDE.md production format
provides:
  - Step 02 instructions for lyrics generation with narrative arc planning and style prompt composition
  - Step 03 instructions for Suno constraint verification, production brief writing, and discography auto-update
affects: [04-01-PLAN, 07-production-intelligence, 05-french-engine, 06-english-engine]

# Tech tracking
tech-stack:
  added: []
  patterns: [narrative-arc-before-lyrics, two-tier-verification, inline-review-then-save]

key-files:
  created:
    - .claude/skills/create-track/steps/02-structure-and-write.md
    - .claude/skills/create-track/steps/03-verify-and-save.md
  modified: []

key-decisions:
  - "Narrative arc planning mandatory before lyrics generation to prevent repetitive verse content"
  - "Two-tier lyrics reporting: 3000 chars recommended with warning, 5000 chars hard block"
  - "Style prompt sweet spot zones (5 ranges) reported in verification table, not just pass/fail"
  - "Future linguistic verification noted as placeholder -- Phase 4 scope limited to Suno constraint checks"

patterns-established:
  - "Inline creative review: present lyrics in Step 2, save only in Step 3"
  - "5-tier priority style prompt formula: genre > mood > vocal > instruments > production"
  - "Auto-correction for missing French language tag in style prompt"
  - "Production brief file format: Titre, Artiste, Langue, Style Prompt, Lyrics, Rapport, Notes"

# Metrics
duration: 2min
completed: 2026-04-10
---

# Phase 4 Plan 02: Structure, Write, Verify and Save Summary

**Lyrics generation with narrative arc planning, 5-tier style prompt composition, and Suno constraint verification with two-tier reporting**

## Performance

- **Duration:** 2 min
- **Started:** 2026-04-10T16:00:14Z
- **Completed:** 2026-04-10T16:03:00Z
- **Tasks:** 2
- **Files created:** 2

## Accomplishments
- Step 02 provides complete creative engine: narrative arc planning, 7-operation lyrics generation flow with genre template reading, and style prompt composition using the 5-tier priority formula
- Step 03 provides complete finalization pipeline: 6 Suno constraint checks with thresholds, 5-zone style prompt reporting, production brief file format template, and automatic discography update
- Together they complete the creative-to-finalization workflow: generate inline for review, then verify and save

## Task Commits

Each task was committed atomically:

1. **Task 1: Create Step 02 -- Structure and Write Lyrics** - `664c537` (feat)
2. **Task 2: Create Step 03 -- Verify Constraints and Save** - `7643143` (feat)

## Files Created/Modified
- `.claude/skills/create-track/steps/02-structure-and-write.md` - Creative engine: narrative planning, lyrics generation, style prompt composition, inline review
- `.claude/skills/create-track/steps/03-verify-and-save.md` - Verification and finalization: Suno constraints, production brief format, discography auto-update

## Decisions Made
- Narrative arc planning is mandatory before lyrics generation -- prevents the anti-pattern of repetitive verse content that CLAUDE.md forbids
- Two-tier lyrics reporting (3000 recommended / 5000 hard limit) with distinct behaviors: WARNING at 3000-5000, BLOCK at 5000+
- Style prompt verification uses 5 descriptive zones instead of binary pass/fail -- provides actionable guidance for prompt tuning
- Linguistic verification (syllable counting, rhyme analysis) explicitly deferred to Phases 5-7 with a placeholder note in the verification report

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 3 - Blocking] Created missing directory structure**
- **Found during:** Pre-execution setup
- **Issue:** `.claude/skills/create-track/steps/` directory did not exist (04-01 not yet executed)
- **Fix:** Created the directory with `mkdir -p`
- **Files modified:** Directory structure only
- **Verification:** Both step files written successfully
- **Committed in:** Part of task commits (directory created implicitly by file write)

---

**Total deviations:** 1 auto-fixed (1 blocking)
**Impact on plan:** Minimal -- directory creation was necessary because 04-01 and 04-02 are wave 1 (parallel). No scope creep.

## Issues Encountered
None -- both files created cleanly and all verification checks passed.

## User Setup Required
None - no external service configuration required.

## Next Phase Readiness
- Steps 02 and 03 are ready. Once 04-01 creates SKILL.md and Step 01, the complete create-track skill will be functional.
- The 3-step workflow (collect inputs -> structure and write -> verify and save) forms a complete creative-to-finalization pipeline.
- Phase 5 (French linguistic engine) and Phase 6 (English linguistic engine) can later enhance the verification report with syllable counting and rhyme analysis.
- Phase 7 (production intelligence) can enhance style prompt auto-generation and vocal metatag optimization.

## Self-Check: PASSED

All files found, all commits verified.

---
*Phase: 04-core-track-production*
*Completed: 2026-04-10*
