# S01 Post-Slice Assessment

**Verdict: Roadmap is fine. No changes needed.**

## What S01 Delivered vs Plan

S01 delivered exactly the boundary contracts specified in the roadmap:
- `ExcelTrafficRecord` (10 fields, neutral ip1/port1 naming per D043)
- `ColumnMapping` with `from_headers()` and zero-based indices
- `ExcelIngestionResult` with records, column_mapping, stats, warnings
- `detect_columns()` with synonym dictionary (D044)
- `ingest_excel_file()` with openpyxl read_only mode
- `ExcelConfig` nested in `PolicyFoundryConfig`
- CLI `--source excel --file <path>` with Rich summary

No deviations from the boundary map. All consuming slices (S02, S05) can proceed as planned.

## Risk Retirement

**Excel format variability** — Retired as planned. Auto-detect maps all 10 columns from the sample file. Config override tested with non-standard headers. Synonym dictionary covers common vendor naming patterns.

## Success Criterion Coverage

All 11 success criteria have at least one remaining owning slice. The two criteria S01 was responsible for (auto-detect, config override) are now validated. No gaps.

## Requirement Coverage

- R101, R102: validated by S01 (54 tests + CLI demo)
- R103–R112: active, unchanged slice ownership, no coverage gaps
- No new requirements surfaced
- No requirements invalidated or re-scoped

## Forward Concerns

None. The neutral field naming (ip1/port1 not src/dst) is well-documented in D043 and S01's forward intelligence. S02 knows it must infer direction from flags, interfaces, and port patterns. The `flag` field values (U/UI/UIO) are documented for S02's consumption.

## Remaining Slices

S02–S05 proceed as designed. No reordering, merging, splitting, or adjustment needed.
