{
  "slice_id": "WU-01",
  "version": "1.0",
  "type": "VERTICAL_SLICE",
  "bounded_outcome": "Observable All ↔ Unfinished filtering behavior.",
  "criteria_closed": [
    "AC-01",
    "AC-02"
  ],
  "allowed_change_surface": [
    "src/filtering.py"
  ],
  "required_evidence": [
    "visible tests",
    "deterministic baseline diff/change-surface review",
    "rollback readiness",
    "no-schema-change inspection"
  ],
  "rollback_boundary": "Supplied baseline/fixture snapshot restores the complete local fixture; oracle tests remain read-only.",
  "read_only_oracle_files": [
    "tests/test_filtering.py"
  ],
  "state_mechanism": {
    "baseline_manifest": "BASELINE_MANIFEST.json",
    "tool": "tools/lab_state.py",
    "external_repo_setup_required": false
  }
}