three-tier-layout's local-artefact placement check matches exact names directly under a committed tier only — residual evasions flagged at review: a nested artefact (a NEXT.md one directory below a tier root), a NEXT.md at the .abcd/ root itself (one directory off the modelled incident), and lowercase name variants on case-sensitive filesystems all pass clean. Widening (depth, roots, case folding) must not start flagging legitimate tier content.

three-tier-layout's local-artefact placement check matches exact names directly under a committed tier only — residual evasions flagged at review: a nested artefact (a NEXT.md one directory below a tier root), a NEXT.md at the .abcd/ root itself (one directory off the modelled incident), and lowercase name variants on case-sensitive filesystems all pass clean. Widening (depth, roots, case folding) must not start flagging legitimate tier content.

Grounds

• pursued: a nested handover, a local artefact at the .abcd root, and another-case spelling are each flagged, and legitimate nested tier content is not; a fixture of any of those shapes that lints clean, or a study's nested logs/ that is flagged, would show it wrong