---
phase: 05-french-linguistic-engine
plan: 02
subsystem: linguistic
tags: [ipa, phonetics, rhymes, french, verification]

# Dependency graph
requires:
  - phase: 01-foundation
    provides: "Foundation rhymes.md with classification, seuils, 4 examples"
provides:
  - "6-step IPA-first rhyme verification procedure with anti-orthographic safeguard"
  - "Pieges orthographiques section (20 false-negative + 13 false-positive pairs)"
  - "Pre-classified frequent rhymes table (34 pairs) for quick lookup"
  - "5-step suggestion workflow for weak rhymes below section thresholds"
  - "Rimes identiques and rimes feminines/masculines rules"
affects: [07-verification-engine, 05-03, track-production]

# Tech tracking
tech-stack:
  added: []
  patterns: [anti-orthographic-verification, ipa-first-procedure, suggestion-workflow]

key-files:
  created: []
  modified:
    - reference/linguistic/french/rhymes.md

key-decisions:
  - "IPA transcription mandatory before any rhyme comparison -- anti-LLM-orthographic-matching safeguard"
  - "False-positive 'faux pieges' included in trap section to train against over-rejection"
  - "Suggestion workflow includes reformulation strategy when target phoneme ending is inherently limiting"
  - "Rimes identiques (homophones) excluded from rhyme counting unless documented as intentional word play"

patterns-established:
  - "Anti-orthographic encadre: every phonetic procedure starts with explicit warning against visual matching"
  - "Pre-classified lookup tables: frequently used pairs stored with IPA to avoid re-computation"
  - "Suggestion workflow: when a rhyme fails threshold, structured 5-step process generates alternatives"

# Metrics
duration: 3min
completed: 2026-04-10
---

# Phase 5 Plan 02: French Rhyme Verification Summary

**IPA-first rhyme verification procedure with anti-orthographic traps, 34-pair pre-classified table, and weak-rhyme suggestion workflow**

## Performance

- **Duration:** 3 min
- **Started:** 2026-04-10T16:36:02Z
- **Completed:** 2026-04-10T16:39:30Z
- **Tasks:** 1
- **Files modified:** 1

## Accomplishments

- Extended rhymes.md from 131 lines (foundation) to 348 lines (complete) with formalized 6-step IPA verification procedure
- Added comprehensive Pieges Orthographiques section with 20 false-negative and 13 false-positive pairs covering nasal vowels, silent endings, and deceptive graphemes
- Created pre-classified frequent rhymes table (34 pairs across riche/suffisante/pauvre) for quick reference during track production
- Added 5-step suggestion workflow for upgrading weak rhymes, including reformulation strategy for inherently limiting phoneme endings

## Task Commits

Each task was committed atomically:

1. **Task 1: Etendre rhymes.md avec procedure anti-orthographique, pieges, et tables de rimes** - `a1e869e` (feat)

## Files Created/Modified

- `reference/linguistic/french/rhymes.md` - Complete French rhyme classification with IPA-first verification procedure, orthographic traps, pre-classified frequency table, and suggestion workflow

## Decisions Made

- IPA transcription is mandatory before any rhyme comparison -- explicit anti-LLM-orthographic-matching safeguard placed at the top of the verification procedure
- Included "faux pieges" (pairs that look like they shouldn't rhyme but do) in the false-positive section to train against over-rejection -- avoids the opposite error of being too strict
- Suggestion workflow includes a reformulation strategy: when the target phoneme ending is inherently limiting (e.g., /ui/ only produces suffisante), the workflow suggests changing the anchor word rather than endlessly searching for non-existent richer rhymes
- Rimes identiques (homophones) are excluded from rhyme counting unless documented as intentional wordplay (rime equivoquee) to prevent lazy repetition

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered

None.

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

- rhymes.md is complete with status: complete
- Ready for Plan 05-03 (pronunciation.md extension)
- Cross-references to pronunciation.md and syllables.md are in place
- The pre-classified rhyme table is extensible -- new pairs can be added during track production

---
*Phase: 05-french-linguistic-engine*
*Completed: 2026-04-10*
