# Plan Review: Step 1 — Add classifier states and fixture coverage

**Verdict:** Approved

The revised Step 1 plan addresses the prior review concerns and is scoped appropriately to `internal/analysis/interval_source.go` and `internal/analysis/interval_source_test.go`.

## Notes for implementation

- Keep the precedence explicit in code/tests: structured markers, then explicit device-lap markers, then `group_id` evidence, then existing uniform auto-lap fallback, then `unknown`.
- Treat absence of `group_id` as `manual_added` only when interval rows expose raw upstream evidence; nil/empty `Raw` must not become manual.
- Include regression cases for grouped, ungrouped/manual, mixed, structured, device-lap, and unknown outcomes.
- Leave analyzer/tool response propagation, schema snapshots, README, and changelog to later steps as planned.
