---
phase: 05-french-linguistic-engine
plan: 01
subsystem: linguistic-reference
tags: [french, syllables, phonetics, ipa, dierese, synerese, e-muet, verification]

# Dependency graph
requires:
  - phase: 01-foundation
    provides: "Initial syllables.md with SI/ALORS rules, IPA notation, 4 examples (01-03)"
provides:
  - "Formalized 6-step syllable verification procedure forcing word-by-word decomposition"
  - "Dierese/synerese lookup table with 113 entries organized by suffix category"
  - "5 validation tests with known answers for Claude self-checking"
  - "Extended e muet edge cases (double consonant, elision, consecutive e muets)"
affects: [05-02, 05-03, 07-integration, create-track-skill]

# Tech tracking
tech-stack:
  added: []
  patterns:
    - "Lookup table over etymology-based rules for LLM reliability"
    - "Forced step-by-step decomposition to compensate LLM phonological weakness"
    - "Known-answer validation tests as self-check mechanism"

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

key-decisions:
  - "113 table entries organized by suffix groups (-ion, -ien, -iel, -ience, -ieux, -uel, diverse, diphtongues) for navigability"
  - "Validation tests include genre-dependent counting (pop vs rap) to demonstrate e muet impact"
  - "Default rule: synerese for unlisted words + ambiguity flag in verification report"

patterns-established:
  - "Procedure format: numbered Etape sections with SI/ALORS rules and explicit output format"
  - "Table format: Mot | Traitement | Syllabes (decomposition) | IPA | Notes"
  - "Validation test format: line, expected answer, full step-by-step decomposition"

# Metrics
duration: 4min
completed: 2026-04-10
---

# Phase 5 Plan 01: French Syllable Verification Summary

**Formalized 6-step syllable counting procedure with 113-word dierese/synerese lookup table and 5 known-answer validation tests**

## Performance

- **Duration:** 4 min
- **Started:** 2026-04-10T16:35:56Z
- **Completed:** 2026-04-10T16:39:49Z
- **Tasks:** 1
- **Files modified:** 1

## Accomplishments
- Extended syllables.md from 119 lines (foundation) to 450 lines (complete) with formalized verification procedure
- Created comprehensive dierese/synerese lookup table with 113 entries covering ~90% of common song words
- Added 6-step verification procedure that forces explicit word-by-word decomposition with IPA transcription
- Added 5 validation tests including genre-dependent counting (pop vs rap e muet treatment)
- Extended e muet rules with 3 additional edge cases (double consonant, pronoun elision, consecutive e muets)

## Task Commits

Each task was committed atomically:

1. **Task 1: Etendre syllables.md avec procedure formalisee et table dierese/synerese exhaustive** - `ce196db` (feat)

## Files Created/Modified
- `reference/linguistic/french/syllables.md` - Complete French syllable counting reference with verification procedure, 113-entry lookup table, 6 worked examples, and 5 validation tests

## Decisions Made
- Organized table by suffix groups (-ion, -ien, -iel, -ience, -ieux, -uel, diverse, diphtongues) for navigability rather than alphabetical order
- Included both dierese and synerese entries in the same table (not separate tables) for single-lookup convenience
- Validation tests show ambiguity explicitly (Test 3 "manques" e muet, Test 4 genre-dependent counting) rather than hiding it
- Default rule explicitly stated: synerese for unlisted words + mandatory ambiguity flag in verification report

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered

None.

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness
- syllables.md is complete and ready for cross-reference by rhymes.md (Plan 02) and pronunciation.md (Plan 03)
- The 6-step procedure format establishes the pattern for the rhyme verification procedure in Plan 02
- Table format established for the rhyme frequency table in Plan 02

## Self-Check: PASSED

- FOUND: reference/linguistic/french/syllables.md
- FOUND: .planning/phases/05-french-linguistic-engine/05-01-SUMMARY.md
- FOUND: ce196db (Task 1 commit)

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