# S03 Post-Slice Roadmap Assessment

**Verdict: Roadmap unchanged.**

## Success Criterion Coverage

All 6 milestone success criteria have at least one owning slice:

- Import to TS with 3 groups → correct group, deduped, formatted → S01 ✅ + S03 ✅
- Multi-file transaction, third fails → all rolled back → S04 (remaining)
- Dry-run edit_symbol → diff returned, file unchanged → S04 (remaining)
- Python class method at 4-space indent → S02 ✅
- Rust derive appended, not duplicated → S02 ✅
- Response formatted:true/false with reason → S03 ✅

Two unproved criteria map to S04. No gaps.

## Risk Retirement

S03 retired its target risk (external tool availability and config discovery). Formatter detection, subprocess timeout/kill, and graceful not-found degradation all proven through integration tests. No residual risk carries forward.

## S04 Alignment

S03's forward intelligence confirms S04's design assumptions hold:

- `write_format_validate()` accepts params as `&serde_json::Value` — dry_run extraction follows the identical pattern used for validate (zero call-site changes)
- Dry-run should show formatted result per D047 — intercept before `fs::write`, run format on proposed content, diff against original
- `similar` crate for unified diff generation already planned (D044)
- Transaction rollback uses BackupStore snapshots already taken by each command
- S04 risk remains `low`, dependencies remain `[]`

## Requirement Coverage

- R018 (dry-run) and R019 (transactions) remain active, owned by S04. No change.
- R016 and R017 validated by S03. No change needed in requirements.
- No new requirements surfaced by S03.
- No requirements invalidated or re-scoped.

## Changes Made

None. Roadmap, boundary map, proof strategy, and requirement ownership all hold as written.
