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Detected Sheet and Layered Review

Status: Partially implemented work-in-progress; not a validated product accuracy claim

Authority: Current contract claim boundary; 2026-08-07 plan draft is partly stale versus the Detection worktree

Last reviewed: 2026-08-14

Question

What is a Detected Sheet, and what may Drawing Lab claim about it today?

Short answer

A Detected Sheet is a layered review result assembled from compatible cached evidence. Assembly can present appearance, geometry, text, dimensions, tables, and related layers. Assembly does not invent semantic truth. Completeness is not accuracy.

Planned layered result

Intended layers include source, appearance references, understanding geometry, views, text, dimensions, tables, symbols, notes, and unresolved evidence. The exact durable layer contract remains work-in-progress.

Current claim boundary

  • Prefer compatible cached input results when assembling a page result
  • Keep page coordinates
  • Keep method, settings, runtime, cache, and source provenance
  • Do not treat clean preview completeness as accepted understanding
  • Do not claim validated table or dimension accuracy from assembly alone

Dated contradiction

The 2026-08-07 detected-sheet plan draft said implementation had not started. The Detection worktree later contains assembler behavior for layered review from caches. This wiki prefers the later implementation evidence and the current contract claim boundary. The plan-draft “not started” sentence is stale.

Relation to Fast Dimension Lines

Fast Dimension Lines can warm OCR and arrowhead caches without invoking generic sheet assembly. That boundary prevents assembly work from dominating dimension runtime.

Open Questions

  • Which assembler version becomes the accepted Detected Sheet contract after owner review?

Sources

  • Current contract: table-dimension-detection-architecture.md (2026-08-12)
  • Plan draft: 260807_detected-sheet-assembly under the PM Drawing Lab worktree (partly stale)
  • Detection worktree assembler behavior (work-in-progress implementation)