---
phase: 08-coherence-engine
plan: 03
subsystem: verification
tags: [coherence, cross-track, emotion-drift, repetition-detection, narrative-progression]

# Dependency graph
requires:
  - phase: 08-coherence-engine
    provides: "08-01 added Verification de Coherence to Step 03; 08-02 added enriched discography stats (Distribution emotionnelle, Emotions non-explorees)"
  - phase: 04-core-track-production
    provides: "3-step track creation workflow, discography tracking"
provides:
  - "Cross-track analysis in Step 01 with early warnings for emotion drift (COH-06), thematic/lyrical repetition (COH-07), and narrative progression (COH-08)"
  - "Formal cross-track report table in Step 03 production brief"
  - "Conditional analysis thresholds based on discography size (drift >= 3, repetition >= 2, progression always)"
affects: [create-track]

# Tech tracking
tech-stack:
  added: []
  patterns: [conditional-threshold-analysis, early-warning-before-writing, informational-non-blocking-reports]

key-files:
  created: []
  modified:
    - ".claude/skills/create-track/steps/01-collect-inputs.md"
    - ".claude/skills/create-track/steps/03-verify-and-save.md"

key-decisions:
  - "Cross-track findings are informational (non-blocking) -- they complement bible alignment checks but do not trigger post-verification interaction"
  - "5-file reading limit for lyrical repetition comparison balances thoroughness with efficiency"
  - "Narrative progression suggestions always execute, even with 0 previous tracks, using lore arc or general lore"

patterns-established:
  - "Early-warning-before-writing: cross-track analysis in Step 01 guides creative direction before lyrics are written"
  - "Informational-non-blocking: cross-track ATTENTION flags document findings without blocking save (unlike bible ALERTE)"
  - "Conditional-threshold: each analysis type has a minimum track count threshold to avoid meaningless analysis"

# Metrics
duration: 2min
completed: 2026-04-11
---

# Phase 8 Plan 03: Cross-Track Analysis Summary

**Cross-track analysis with emotion drift detection, thematic/lyrical repetition warnings, and narrative progression suggestions integrated into track creation workflow (Steps 01 and 03)**

## Performance

- **Duration:** 2 min
- **Started:** 2026-04-10T23:26:29Z
- **Completed:** 2026-04-10T23:28:24Z
- **Tasks:** 2
- **Files modified:** 2

## Accomplishments
- Added cross-track analysis section to Step 01 with 3 checks (COH-06 emotion drift, COH-07 thematic/lyrical repetition, COH-08 narrative progression) as step 4 with proper renumbering
- Integrated cross-track findings into creative direction summary for user awareness before writing
- Added formal cross-track report table to Step 03 Verification de Coherence section and production brief template
- All checks have conditional thresholds: drift requires >= 3 tracks, repetition requires >= 2 tracks, progression always runs

## Task Commits

Each task was committed atomically:

1. **Task 1: Add cross-track analysis to Step 01 (early warnings)** - `ee57168` (feat)
2. **Task 2: Add formal cross-track report to Step 03** - `1c0a4ec` (feat)

**Plan metadata:** [pending] (docs: complete plan)

## Files Created/Modified
- `.claude/skills/create-track/steps/01-collect-inputs.md` - Added step 4 with cross-track analysis (3 subsections: drift emotionnel, repetition thematique/lyrique, progression narrative), renumbered steps 4-6 to 5-7, updated creative summary with cross-track block, added validation checkbox
- `.claude/skills/create-track/steps/03-verify-and-save.md` - Added Coherence Cross-Track subsection with 4-row report table inside Verification de Coherence, and matching table in production brief template

## Decisions Made
- Cross-track findings are informational (non-blocking) -- they complement bible alignment checks but do not trigger post-verification interaction, since warnings were already surfaced in Step 01
- 5-file reading limit for lyrical repetition to balance analysis depth with workflow efficiency
- Narrative progression suggestions always execute (even with 0 previous tracks) by falling back to lore arc or general lore directions

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered
None

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

## Next Phase Readiness
- Phase 8 (Coherence Engine) is now complete with all 3 plans delivered
- The full coherence pipeline is operational: bible alignment (08-01) + enriched discography stats (08-02) + cross-track analysis (08-03)
- Track creation workflow now provides: early cross-track warnings (Step 01) -> informed writing (Step 02) -> formal coherence report (Step 03)
- All 8 phases of the project roadmap are complete

## Self-Check: PASSED

- [x] `.claude/skills/create-track/steps/01-collect-inputs.md` exists
- [x] `.claude/skills/create-track/steps/03-verify-and-save.md` exists
- [x] `.planning/phases/08-coherence-engine/08-03-SUMMARY.md` exists
- [x] Commit `ee57168` found
- [x] Commit `1c0a4ec` found

---
*Phase: 08-coherence-engine*
*Completed: 2026-04-11*
