Audit AttributeDefinition through both formats; pin the DXF reader gap

Compares every writable ATTDEF field through DWG and DXF. DWG round-trips the
complete state; acadrust's DXF reader handles only eight group codes, so
alignment, width factor, oblique angle, attribute flags, field length,
generation flags, lock and text style reopen as defaults. Pinned by canary
expectations and recorded in the ledger.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

docs/plugin-host-model-coverage-ledger.md

@@ -25,7 +25,7 @@ Completion gate codes: **C** = create through Python document model; **R** = rea
 | Insert | **Update-only (all gates pass)** | Exercised: `insert_point`, `x_scale`, `y_scale`, `rotation`, `column_count`, `column_spacing`. `audit_python_insert_lifecycle_over_real_ipc` passes E/D/U/I/W/V/P with a host-made block and insert: a six-property transaction edit, canvas wires, rejection of a zero scale, non-finite rotation and point, a zero array count, a zero normal and a `block_name` change (read-only), an atomic rollback, DWG and DXF reopen with re-edit, and undo/redo. Not `Complete` because Python cannot create an Insert (creation and block-reference semantics are an open decision: permanent update-only, or a create path that names an existing block). |
 | Tolerance | **Complete** | `staged_python_tolerance_lifecycle_over_real_ipc` passes C/R/E/D/U/I/W/V/P with the staged API v7 plugin: high-level create/read/transaction edit/delete; insertion, direction, and text edits; live canvas selection; grouped undo/redo; invalid direction and missing style atomic rollback; exact untouched common/style/private-field preservation; and edited DWG plus DXF reopen. Host-owned coverage exposes placement, direction, normal, text, style name, height and gap; style handle is read-only and the undocumented DWG short remains unmapped. `tolerance_geometry_and_style_references_are_validated` and the existing Tolerance tessellation tests cover reference and rendered-frame behavior. |
 | Shape | **Complete** | `staged_python_shape_lifecycle_over_real_ipc` passes C/R/E/D/U/I/W/V/P with a generated parser-valid SHX file and a real shape-file `TextStyle`: high-level create/read/transaction edit/delete; insertion, size, rotation and width-factor edits; live canvas selection; grouped undo/redo; invalid size and missing style rollback; exact identity/style/common-field preservation; and DWG plus DXF reopen. Each live and reopened document renders the three-point SHX glyph rather than the placeholder. Host-owned reference binding writes the stable style handle needed by DWG. The DXF fallback now searches all `is_shape_file` styles, preserving named-style glyph resolution after reopen. |
-| AttributeDefinition | **Integration-tested / DXF blocker pending revalidation** | Host commit `5b854bd1` maps block ownership plus every stable ATTDEF field except the nested `embedded_mtext` payload, which is snapshot-readable and preserved untouched. `staged_python_attribute_definition_lifecycle_over_real_ipc` passes C/R/E/D/U/I/V/P with a real block record, Block/BlockEnd markers and linked Insert: high-level creation inside the block, readback, grouped placement/default/rotation/width edits, selection, rendered text, atomic tag/height/style/owner rejection, deletion persistence, and three-step undo/redo. DWG reopens with the full edited state. DXF reopens identity, ownership, tag, prompt, value, placement, height and rotation, and OCS no longer double-converts ATTDEF/ATTRIB rotation. **W remains open:** acadrust `568a12c` dropped optional ATTDEF fields including width factor while reading DXF. Rerun the regression against the currently merged `7ea4247` revision and update this row with the result. `embedded_mtext` mutation remains unsupported pending linked-layout validation. |
+| AttributeDefinition | **Integration-tested / blocked at W by acadrust (DXF ATTDEF reader)** | Host commit `5b854bd1` maps block ownership plus every stable ATTDEF field except the nested `embedded_mtext` payload, which is snapshot-readable and preserved untouched. Two staged tests cover it. `staged_python_attribute_definition_lifecycle_over_real_ipc` passes with a real block record, Block/BlockEnd markers and a linked Insert. The 2026-09-20 audit `audit_python_attribute_definition_lifecycle_over_real_ipc` (shared `run_mesh_lifecycle`, host-made block) compares **every writable field** through both formats: creation with non-default tag, prompt, value, placement, alignment point, height, rotation, width factor, oblique angle, alignments, all attribute flags, field length, generation flags and lock; a nine-property transaction edit; canvas wires; eight rejection cases (whitespace tag, non-positive height and width factor, missing style, owner change, zero normal, non-finite rotation, unknown alignment) plus an atomic rollback; DWG reopen with the **complete** edited state and re-edit; deletion; and three-step undo/redo. **W blocker, revalidated on acadrust `5b682ed`:** the DXF writer emits every ATTDEF group, but the reader handles only groups 1, 2, 3, 10, 40, 50, 280 and 101, so a DXF reopen keeps tag, prompt, value, insertion point, height and rotation and resets the alignment point, both alignments, width factor, oblique angle, all attribute flags (invisible, constant, verify, preset), field length, generation flags, lock and text style to defaults. This is now pinned by canary expectations for both the edit and the re-edit. Not `Complete` until the reader is extended; the fix belongs in cadcodec's `read_attdef`. `embedded_mtext` mutation remains unsupported pending linked-layout validation. |
 | AttributeEntity | **Complete** | OCS commit `cf2a9235` and adapter commit `9c6b5c3` make nested ATTRIB records addressable by handle while retaining canonical storage in `Insert.attributes`. Host validation binds tag to a definition in the Insert's block, validates placement/text geometry and style references, keeps owner and definition handles read-only, and preserves embedded MTEXT. `staged_python_attribute_entity_lifecycle_over_real_ipc` passes C/R/E/D/U/I/W/V/P with a real block, ATTDEF and Insert: high-level create/read/transaction edit/delete, parent selection, rendered text, atomic invalid tag/height/owner rejection, edited and deleted DWG/DXF reopen, and three-step undo/redo. `nested_insert_attribute_crud_uses_parent_storage_and_undo` additionally proves the child never becomes an orphan flat entity in the host document. |
 | Hatch | **Complete** | OCS commit `98b56ef6` and adapter commit `a9b5de8` expose solid and patterned Hatches with elevation/normal, complete pattern definitions, pattern controls, style, association state, boundary paths and seed points. Nested tagged boundary edges use the reusable `{kind, value}` adapter form. Host validation requires closed finite loops, validates line/arc/ellipse/polyline/spline payloads and stored pattern lines, resolves associative boundary handles, and preserves gradient and MPOLYGON payloads as explicitly unsupported. `staged_python_hatch_lifecycle_over_real_ipc` passes C/R/E/D/U/I/W/V/P: Python solid creation, patterned boundary edit, live render-model pattern/boundary checks, selection, atomic invalid scale/association/open-loop/unmapped-property rejection, edited and deleted DWG/DXF reopen, post-reopen edits, and three-step undo/redo. |
 | Leader | **Integration-tested / blocked at W by acadrust** | Fields mapped writable: `vertices` (≥2 finite points, not all coincident), `annotation_handle`, `creation_type`, `path_type`, `dimension_style`, `arrow_enabled`, `hookline_enabled`, `hookline_direction`, `text_height`, `text_width`, `normal`, `horizontal_direction`, `block_offset`, `annotation_offset`. Read-only: `origin`, `dimension_gap`, `arrowhead_type`, `arrow_size`, `byblock_color`. `override_color` is writable through the new generator `Color` form (`{'kind': 'Rgb', 'value': {'r','g','b'}}`, `Index`, `ByLayer`, `ByBlock`, `None`). Unmapped but preserved on edit: the `dwg_unknown_*` fields. Host reference binding validates that `annotation_handle` exists, is not the leader itself, matches `creation_type` (Text/MText, Tolerance, Insert; `NoAnnotation` forbids a handle) and that `dimension_style` exists; nothing is silently defaulted. `staged_python_leader_lifecycle_over_real_ipc` passes C/R/E/D/U/I/V/P against acadrust `7ea4247`: linked Text annotation, path/height/arrow/offset transaction edit with untouched-field preservation, GUI pick grouping (scripted selection stays exact), seven single-edit rejections plus a cross-entity atomic rollback, four-step undo/redo, real render linework, DWG and DXF reopen and re-edit. Erasing a leader also erases its annotation (scene leader grouping); undo restores both. **W blockers (engine, recorded as canary assertions in the test):** (1) the DXF writer never emits group 340, so a DXF save unlinks the annotation; (2) DXF reads drop `annotation_offset` (group 213 is written but not reassembled); (3) DWG R2010+ does not store `text_height`, `text_width` or `hookline_enabled` (acadrust writes them only for R13–R2007 / R13–R14); (4) neither writer stores `override_color`, so it reopens as `ByLayer` in DWG and DXF. Not `Complete` until the engine round-trips (1) and (2); (3) needs a decision to document or make read-only. |