docs: final review pass over the Python host documentation

Rewrite the host-model design note for the current architecture (entities, tables,
commands, nested validation, known limits), refresh the plan's current-state header,
the ledger and gaps-doc status lines (cadcodec PR #48), the README status and the
superseded ocs.command notes, and drop dangling references to a sibling project that
is not in this repository.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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Felix RiestraandClaude Sonnet 5 committed 2026-09-21 18:27:59 +02:00
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# OCS canvas kind coverage ledger
Use with [the completion plan](plugin-host-model-completion-plan.md). This ledger is current as of 20 September 2026: **43 of 43 canvas kinds have explicit geometry writes** (41 creatable, plus update-only legacy `Polyline` and `Body`), **31 kinds are complete**, and none remains layer-only. `Mapped` means at least one non-layer field is exposed for Python writes; it does **not** mean the kind passes the completion gate. `Update-only` means Python creation is unavailable. `Layer-only` means raw inspection and canvas layer edits exist, but geometry is not mapped. Record actual evidence or a blocking issue before changing any status to `Complete`.
Use with [the completion plan](plugin-host-model-completion-plan.md). This ledger is current as of 21 September 2026 (the object tables, block contents and command runner added since are described in [the design note](plugin-host-model.md) and the plan's progress log; they are not entity kinds): **43 of 43 canvas kinds have explicit geometry writes** (41 creatable, plus update-only legacy `Polyline` and `Body`), **31 kinds are complete**, and none remains layer-only. `Mapped` means at least one non-layer field is exposed for Python writes; it does **not** mean the kind passes the completion gate. `Update-only` means Python creation is unavailable. `Layer-only` means raw inspection and canvas layer edits exist, but geometry is not mapped. Record actual evidence or a blocking issue before changing any status to `Complete`.
**Rows blocked at W by cadcodec.** Fixes for six of the DXF bugs behind them are submitted as [HakanSeven12/cadcodec#48](https://github.com/HakanSeven12/cadcodec/pull/48) (ATTDEF fields, boolean group codes for Helix and Light, UNDERLAY rotation, LEADER link and vectors, DRAWINGVIEW/SECTIONLINE dispatch, TABLE merged ranges). OCS still pins the unfixed revision `5b682ed`, so those rows stay blocked and their canaries still assert the wrong result; the expectation is that they flip and the rows move to `Complete` once #48 is merged and OCS repins. That has been checked in cadcodec's own round-trip tests, not yet in OCS.
Completion gate codes: **C** = create through Python document model; **R** = read; **E** = edit defining geometry and another property; **D** = delete; **U** = undo/redo and atomic failure; **I** = real IPC plus GUI/canvas pick or observable behavior; **W** = DWG and DXF save/reopen; **V** = invalid-input checks and untouched-field/reference preservation; **P** = build and load the in-tree bundled plugin with a manifest matching the host toolchain and acadrust source. A kind is `Complete` only when **C/R/E/D/U/I/W/V/P** all pass and its property catalog matches implementation. `Blocked` requires a specific dependency or failing fixture.