---
phase: 08-coherence-engine
verified: 2026-04-10T23:31:13Z
status: passed
score: 13/13 must-haves verified
re_verification: false
---

# Phase 8: Coherence Engine Verification Report

**Phase Goal:** Every track is verified against the artist identity and history before finalization -- genre, vocal style, themes, emotions all align, and cross-track patterns (repetition, emotional drift, narrative progression) are detected.
**Verified:** 2026-04-10T23:31:13Z
**Status:** passed
**Re-verification:** No -- initial verification

## Goal Achievement

### Observable Truths

| #  | Truth | Status | Evidence |
|----|-------|--------|----------|
| 1  | System checks genre alignment between track style prompt and artist bible genre/sous-genres | VERIFIED | 03-verify-and-save.md lines 126-133: COH-01 reads bible Genre principal + Sous-genres, compares to style prompt tags |
| 2  | System checks vocal style consistency between track delivery metatags and artist vocal identity | VERIFIED | 03-verify-and-save.md lines 135-142: COH-02 reads bible Type de voix + Style vocal + Techniques preferees, compares to delivery metatags |
| 3  | System checks theme relevance between track concept and artist defined themes | VERIFIED | 03-verify-and-save.md lines 144-150: COH-03 reads bible Themes recurrents + Univers thematique, compares to track concept/mood |
| 4  | System checks emotion alignment between track emotion and artist palette | VERIFIED | 03-verify-and-save.md lines 152-159: COH-04 reads bible Palette Emotionnelle all three sub-lists, yields OK / OK(secondaire) / ALERTE |
| 5  | System enforces artist-specific Regles de Coherence from the bible | VERIFIED | 03-verify-and-save.md lines 161-167: COH-05 reads bible Regles de Coherence section, verifies each constraint point by point |
| 6  | Coherence checks produce tiered severity verdicts (OK / ATTENTION / ALERTE) not binary pass/fail | VERIFIED | 03-verify-and-save.md lines 169-175: explicit three-level severity table with meanings and actions |
| 7  | User is presented with ALERTE findings and given choice to adjust or keep | VERIFIED | 03-verify-and-save.md lines 189-197: post-verification interaction triggers on ALERTE, presents ajuster/garder choice, handles both paths |
| 8  | Each generated track is logged in discography.md with title, date, themes, emotions, and language | VERIFIED | 03-verify-and-save.md lines 319-344: Mise a Jour Discographie writes row with number, Titre, date, langue, themes, emotions |
| 9  | Discography stats include emotion distribution with counts per emotion | VERIFIED | 03-verify-and-save.md line 341: Distribution emotionnelle field with Emotion(N) format; discography-template.md line 18 confirms field |
| 10 | Discography stats show which emotions from the palette have not been explored yet | VERIFIED | 03-verify-and-save.md line 342: Emotions non-explorees reads palette from bible at runtime; discography-template.md line 19 confirms field |
| 11 | System warns when recent tracks over-index on a single emotion from the artist palette | VERIFIED | 01-collect-inputs.md lines 26-35: COH-06 fires ATTENTION DRIFT when emotion in more than 50% of last 3 tracks; threshold >= 3 enforced |
| 12 | System detects thematic and lyrical repetition across previous tracks and flags duplicates | VERIFIED | 01-collect-inputs.md lines 37-48: COH-07 compares concept to Themes column, reads last 5 track files for lyrical image comparison; threshold >= 2 enforced |
| 13 | System suggests narrative progression ideas based on the artist lore and track history | VERIFIED | 01-collect-inputs.md lines 50-64: COH-08 reads Lore > Arc narratif from bible, maps tracks to arc phases; always executes, falls back to general lore when no arc defined |

**Score:** 13/13 truths verified

### Required Artifacts

| Artifact | Expected | Status | Details |
|----------|----------|--------|---------|
| `.claude/skills/create-track/steps/03-verify-and-save.md` | Verification de Coherence subsection in Rapport de Verification | VERIFIED | Section at line 122 (procedure) and line 286 (file template). All 5 COH checks, severity table, coherence output table, post-verification interaction, Coherence Cross-Track subsection. |
| `.claude/skills/create-track/steps/01-collect-inputs.md` | Cross-track analysis section with early warnings and narrative suggestions | VERIFIED | Step 4 cross-track analysis at line 24. Three subsections: Drift Emotionnel (COH-06), Repetition Thematique et Lyrique (COH-07), Suggestions de Progression Narrative (COH-08). Validation checkbox at line 110. |
| `reference/templates/discography-template.md` | Enhanced stats section with emotion distribution, theme counts, unexplored emotions | VERIFIED | Stats section contains all 6 fields: Total tracks, Langues utilisees, Themes explores, Distribution emotionnelle, Emotions non-explorees, Dernier theme. |

### Key Link Verification

| From | To | Via | Status | Details |
|------|----|-----|--------|---------|
| `03-verify-and-save.md` | `artists/[name]/bible.md` | Reading bible sections for comparison | WIRED | Lines 124, 128, 137, 146, 154, 163: instructs reading bible sections Identite Musicale, Style Vocal, Palette Emotionnelle, Themes, Regles de Coherence by exact name |
| `03-verify-and-save.md` | `reference/templates/discography-template.md` | Step 03 follows template structure when updating discography | WIRED | Lines 319-344: Mise a Jour Discographie field definitions match the template 6 stats fields exactly |
| `reference/templates/discography-template.md` | `artists/[name]/bible.md` | Stats reference bible palette for unexplored emotions | WIRED | 03-verify-and-save.md line 342 implements the link: reads palette from bible at runtime as data source for Emotions non-explorees |
| `01-collect-inputs.md` | `artists/[name]/discography.md` | Reading discography stats for drift detection | WIRED | Lines 30-31: reads Stats > Distribution emotionnelle and Stats > Emotions non-explorees from discography |
| `01-collect-inputs.md` | `artists/[name]/tracks/*.md` | Reading last 5 track files for lyrical repetition | WIRED | Line 44: reads last 5 track files for lyrical image/metaphor comparison |
| `01-collect-inputs.md` | `artists/[name]/bible.md` | Reading lore arc narratif for progression suggestions | WIRED | Line 54: reads Lore > Arc narratif from bible (already loaded in step 2) |

### Requirements Coverage

| Requirement | Status | Notes |
|-------------|--------|-------|
| COH-01 Genre alignment | SATISFIED | 03-verify-and-save.md line 126 |
| COH-02 Vocal consistency | SATISFIED | 03-verify-and-save.md line 135 |
| COH-03 Theme relevance | SATISFIED | 03-verify-and-save.md line 144 |
| COH-04 Emotion alignment | SATISFIED | 03-verify-and-save.md line 152 |
| COH-05 Regles de Coherence enforcement | SATISFIED | 03-verify-and-save.md line 161 |
| COH-06 Emotion drift detection | SATISFIED | 01-collect-inputs.md line 26 |
| COH-07 Repetition detection (thematic + lyrical) | SATISFIED | 01-collect-inputs.md line 37 |
| COH-08 Narrative progression suggestions | SATISFIED | 01-collect-inputs.md line 50 |

### Anti-Patterns Found

None detected. No TODO/FIXME/placeholder comments, no empty return stubs. All procedure sections contain substantive instructions.

### Structural Observation (Not Blocking)

ROADMAP.md line 164 still shows Phase 8 as 0/3 Not started -- the progress table was not updated after plan completion. This is documentation drift only. The actual workflow files contain all phase 8 deliverables fully implemented.

### Human Verification Required

None. All checks were completable programmatically. The coherence engine is instruction-based (markdown workflow files), so correctness is verified by confirming instructions are substantive and wired.

## Gaps Summary

No gaps. All 13 observable truths are supported by substantive, wired artifacts.

The coherence engine delivers:
- Bible alignment (COH-01 through COH-04 plus Regles Specifiques) in Step 03 with tiered severity and ALERTE-triggered user interaction before save
- Enriched discography stats (6 fields including emotion distribution and unexplored emotions) in both the discography template and Step 03 update instructions, with recompute-not-increment rule
- Cross-track analysis (emotion drift, thematic/lyrical repetition, narrative progression) in Step 01 as early warnings before writing, plus formal cross-track report table in Step 03 production brief template

Section ordering in Step 03 is correct: Contraintes Suno -> Verification Linguistique -> Verification de Coherence -> Coherence Cross-Track -> Sauvegarde -> Mise a Jour Discographie -> Confirmation.

Production brief template section ordering is correct: Contraintes Suno -> Verification Linguistique -> Verification de Coherence -> Coherence Cross-Track -> Notes.

---

_Verified: 2026-04-10T23:31:13Z_
_Verifier: Claude (gsd-verifier)_
