# S03 Roadmap Assessment

**Verdict: Roadmap unchanged.**

S03 retired its target risk (entry point detection heuristics) with generic patterns covering exported functions, main/init, and test patterns across 6 languages. No new risks surfaced. No assumptions invalidated.

## Success Criteria Coverage

All 6 success criteria have owning slices:

- `aft_call_tree` cross-file call tree → ✅ S01 (proven)
- `aft_callers` with file watcher invalidation → ✅ S02 (proven)
- `aft_trace_to` on deeply-nested utility → ✅ S03 (proven)
- `aft_impact` on 5+ callers across 3+ files → S04 (remaining)
- `aft_trace_data` on expression with renames/transforms → S04 (remaining)
- All 5 commands respect worktree boundaries → S01 established, S04 inherits

## Requirement Coverage

- R024 (Data flow tracking) — active, owned by S04, unmapped → no change
- R025 (Change impact analysis) — active, owned by S04, unmapped → no change
- All other M003 requirements (R020-R023, R026-R027) validated through S01-S03

## S04 Readiness

S03's forward intelligence confirms clean handoff:

- `trace_to()` backward traversal provides the infrastructure `impact` needs
- `is_entry_point()` is a pure function reusable in `impact` for caller annotation
- `symbol_metadata` on `FileCallData` gives kind/exported/signature for `trace_data` parameter tracking
- Path canonicalization workaround (`lookup_file_data()`) documented — S04 should use same pattern

No boundary map updates needed. S04 description, dependencies, and scope remain accurate.
