`system_get_variable` / `system_set_variable` called `GetVariable` /
`SetVariable` on the object `_acad_app()` returns. Those are `AcadDocument`
members; `AcadApplication` has neither, so on a live seat every call died
with `AttributeError: AutoCAD.Application.GetVariable` before anything
reached AutoCAD -- `drawing_settings` (all keys, read and write) was dead on
the COM engine although both engines were promised. Measured on AutoCAD
2026: `hasattr(app, "GetVariable")` is False. Both methods now resolve the
document through `_acad_doc()`, whose "No drawing is open" refusal is what a
seat without a document reports. Verified live through `ComBackend`:
LIMMAX reads (277.0, 202.5); `drawing_settings({"annotation_scale": "1:50",
"polar_angle": 45, "polar": True})` applies and reads back 1:50 / 0.02 /
45.0 / True in model space.
The test fake shipped with the task had GetVariable / SetVariable on the
*Application*, so the gate asserted a call shape the real object does not
have. `_FakeApp` now carries only `ActiveDocument` + `Documents.Count` and
raises `AttributeError` for the two names, exactly like the real
Application; the sysvar store is a `_FakeDoc` that the real `_acad_doc()`
resolves. Two regression tests: the document is the target (call list), and
no open drawing raises the clear RuntimeError. The older
`tests/test_com_sprint3.py` coercion test pinned the same wrong target and
now fakes the document.
`tests/test_com_backend.py::_measure_backend` replaced the module-level
`_acad_doc` without ever restoring it, so a MagicMock document leaked into
every later test of the session -- invisible while nothing downstream
resolved the document itself, fatal once the sysvar path did. An autouse
fixture in that module restores it.
Not touched (same root cause, other owners): `app.GetVariable` /
`app.SetVariable` in `_ensure_linetype_loaded`, `drawing_info`,
`drawing_audit`, `system_run_command` and `system_run_lisp` in
backends/com_backend.py.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd
ruff format was never run repo-wide; CI now enforces 'ruff format --check', so normalize every module once. No behavior changes.
Co-authored-by: Cursor <cursoragent@cursor.com>
Audit-driven fixes across the dual backend, the premium workflow, and the
engineering layer. 318 tests, ruff-clean.
Quality gate (the moat):
- drawing_finalize now runs the premium ISO-128 critique in addition to the
8-step validator; leftover construction, non-ISO lineweights, untrimmed
corners, duplicates and dim overlap block the gate (strict_critique fails on
warnings too).
- dim_overlap critique no longer a no-op (dim reference point + bbox fallback);
dim/construction layers resolve from the active layer set (iso13567 too).
Stability / correctness:
- view_screenshot & drawing_export_pdf render headless via Agg (no more
worker-thread SIGSEGV).
- gear tooth profile no longer self-overlaps at high tooth counts; section view
no longer duplicates bore lines; validator keyway heuristic fixed.
- ezdxf aligned/angular dim API, full-circle polar array duplicate already
covered by Sprint 1; this bundle adds save-format-from-extension,
entity_offset side selection, ARC length, properties parity (bounding_box /
rotation / char_height), mtext rotation.
COM robustness (mocked-COM tested):
- CoUninitialize on teardown; transaction commit/rollback try/finally + UNDO via
the CMDACTIVE guard; system_run_lisp guard + USERS1 value capture;
set_variable type coercion; HWND via Application.HWND; BlockInfo.description.
Security:
- HTTP remote-bind guard fires on every launch path (incl. `fastmcp run`);
StaticTokenVerifier wired into FastMCP; AutoLISP allowlist bypass-vector tests.
Hygiene: linetype-on-demand in _apply_attrs, honest view_zoom returns, snap-on-arc
sweep handling, point_tangent acos clamp, dynamic tool_groups / tool count,
word-boundary SPUR/HELICAL, undo-stack locking.
Deferred: R22 (undo/transaction stack isolation) lands with the I1 refiner (1.2),
which depends on it.
