The five gaps the plan's reconciliation found, each resolved in the spec:
part placement lives in draw_part(at=, rotation=) so the dataclasses carry no
origin; engineering/sheet/refs.py is gone with the contract correction;
image_attach takes no clip and titleblock_apply no position (the ISO 7200
corner is fixed by the standard) — both recorded as out of 1.6; balloon_add
places one balloon per call against the item numbers bom_extract already
assigned.
Records the four feature tables that ship empty (DIN 509, DIN 471/472,
DIN 332-1, ISO 3601-2): no row could be verified against the standard here, so
the structure, the row-key contract and the refusal ship without rows, and the
features draw from explicit dimensions until the tables are transcribed.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd
The header, global constraints, file structure, the interface block every task
builds against, the group/ownership table and the merge notes. Task sections
are drafted next.
Also corrects the spec's architecture section: the engineering tools compose
the generic contract members the way gear/keyway/titleblock already do, so only
four operations (xref_attach, xref_manage, image_attach, drawing_export_dwg)
need contract members and an implementation per engine.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd
One part model — a revolved or prismatic profile plus typed features — and one
view engine that projects it into front/side/section/detail views with hidden
lines, cut faces and dimensions, instead of a generator per part shape. Around
it: the standard-parts catalogue as code inserted as blocks with attributes,
the ISO annotation symbols, and the sheet standard (ISO 5457 frames A4-A0,
ISO 7200 title blocks, revisions, ISO 7573 parts list, balloons, xrefs, DWG).
25 tools in four sections, new pack `mech`, three capability keys, six mech_*
critique focuses, benchmark task `mech_assembly` and six correctness checks.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd
CLAUDE.md gains items 18-20 (styles, page setup & templates, environment),
the grown drawing_settings facade on item 11, lean 55 / 52 and
TOOL_PACKS=all|core,pid,settings, and three conventions: layer states are
ours (ACADMCP_LAYERSTATES XRECORD, mode "xrecord"), page-setup evidence is
the PDF's own /MediaBox, nothing interprets coordinates in UCS.
README token table re-measured on this tree with benchmarks/token_suite.py
(ratio/v1 estimates): full 199 tools / 59,315 tokens, core,settings 190 /
55,593, core 168 / 48,825, lean 55 / 16,360, search 2 / 356; corpus
re-derived from discovery.aliases: 186 AutoCAD command names, 933 synonym
phrases, 204 tools. Styles & standards row, page setup & templates row,
final environment wording, and "Known limitations of the settings track".
CHANGELOG Unreleased: the track E intro, Added (styles, page setup &
templates, environment, drawing_settings growth, benchmark evidence),
Fixed (the Track A hardening list), Changed (three groups, packs, measured
idle cost, release snapshot 204 · 8 · 5 · 3284). Spec status: implemented.
Where the plan's text and the tree disagreed, the tree wins:
mleaderstyle_create is implemented on both engines through the
ACAD_MLEADERSTYLE dictionary and no `mleaderstyle` capability key exists
(spec §4, capability maps), so the docs say so instead of calling it
ezdxf-only; the Task 7 fix (tolerant ACADMCP_PID payloads, crossings
tested against the arc) joins the hardening list the plan left it out of.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd
Two review findings, both root causes.
1. `_sync_header_to_dimstyle` copied the DIMSTYLE entry's ezdxf-internal
arrowhead spelling (OBLIQUE) into the DXF-facing $DIMBLK/$DIMBLK1/$DIMBLK2
header, so the saved file named a block it did not hold (the blocks are
_OBLIQUE / _DOT) and `system_get_variable("DIMBLK")` answered "OBLIQUE"
headlessly against "_OBLIQUE" on COM and in the same engine's own
`dimstyle_list` row. The header write now goes through
`reported_arrowhead` — the same read-side rule `_dimstyle_value` applies.
Pinned by header, `system_get_variable`, save/reopen (`ezdxf.readfile`
header equals the block the file holds) and the Restore-to-Standard
empty-string case in `test_builtin_arrowheads_render_save_and_report_one_spelling`.
2. The `mleaderstyle` capability refusal rested on a false engine boundary.
acax25enu.tlb (AutoCAD 2026) exposes IAcadMLeaderStyle with Name,
ArrowSize, LandingGap, TextHeight, TextStyle, ... — exactly what
`Dictionaries.Item("ACAD_MLEADERSTYLE").Item(i)` returns — and
IAcadDictionary.AddObject(keyword, "AcDbMLeaderStyle") creates one.
COM `mleaderstyle_list` now reads the four values off those objects
(`values_available: True`); COM `mleaderstyle_create` validates every value
(`validate_mleaderstyle`, shared with ezdxf), checks the clash and the text
style before AddObject, then writes the four properties. The contract
method is `@abstractmethod` again, the key is gone from both capability
maps, the fake ActiveX surface models the real call shape, and the spec
(§4.2, §8.1, §9) states the ActiveX route.
Live AutoCAD was not running on this machine (GetActiveObject: operation
unavailable; no acad.exe), so the COM route is type-library-verified and
fake-tested, not executed live — scripts/smoke_settings_com.py (Task 24)
owns that.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd
38 tools in three sections: ISO-25/ANSI dimension, text and leader styles
with drawing_apply_standard; drawing_settings growth, a system-variable
catalogue and document properties; page setup with PDF mediabox read-back,
batch plot and five bundled templates built by the server's own tools;
multi-document on both engines, portable layer states, named views, UCS,
launch, preferences and operator prompts. Track A hardening is wave 0.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd
scripts/smoke_pid_com.py runs the whole track against the live AutoCAD in
a new document. ComBackend.connect() is lazy by design, so the script reads
reachability from system_status()["connected"] rather than from connect()
as the plan sketched, and closes its document without saving unless --keep
is passed. On this machine (AutoCAD 2026, "25.1s (LMS Tech)") it exits 0:
5 nodes, 4 edges, 0 dangling, confidence_min 1.0, 0 critique issues,
2 XDATA chunks — identical to the headless engine on the same spec. The
first attempt exited 2 on a stale win32com gen_py cache (a package folder
holding only __pycache__); an environment fault, no backend change needed.
A/B against v1.5.1 published as ab-v1.5.1-vs-v1.6.0-dev.json: 26/29 ->
29/29, three miss -> pass, zero regressed. check_doc_numbers.py now names
the report and the two row labels in one place (AB_REPORT, AB_*_LABEL),
and README.md / benchmarks/README.md carry the new rows; the v1.5.0 and
v1.4.0 tables stay as history.
README: P&ID row, the showcase and catalogue images, the token table
re-measured (161 / 44,930 by default, 152 / 41,420 with TOOL_PACKS=core,
lean 50 / 14,007), every stale count reconciled (154 -> 166 registered,
149 -> 161 advertised, corpus 158/672 -> 162/731 by the same count, 19 ->
20 groups, 6 -> 8 resources, six-task matrix with pid_roundtrip), a
"Known limitations of the P&ID track" subsection, and the snapshot line at
this machine's 2423 collected tests (CI has not run on this tree; noted in
the changelog with the pre-existing 1369 vs 1363 drift).
CLAUDE.md: section 17, sections 5 and 7 counts, TOOL_PACKS, the two 1.6
contracts and the reader rules. Spec status -> implemented. The plan and
spec markdown were reformatted by ruff (fenced Python only) because
`ruff format --check .` was already red on them at HEAD and the gate
requires the whole tree clean.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd
Plan covers the prerequisite block_insert attribute fix (ezdxf wrapped the
INSERT in an anonymous *U block and lost its ATTRIBs), the two generic
contracts, the 43-symbol catalogue, routing, the ISA-5.1 grammar, the
graph reader, deliverables, six critique focuses, pid_from_spec, TOOL_PACKS,
resources, benchmark v4, and the live COM smoke.
Spec reconciled with the plan: 43 base symbols, FUNC/LOOP at +-2.0,
solid = DXF SOLID entity, shape/direction options, example spec uses an
actuated FCV-101 (a hand valve has no signal port), refine hints in
detail["hint"], preflight LAYER_SET_INTENT_MISMATCH, radial port matching
on the circle.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd
Research snapshot of the AutoCAD MCP field (20 READMEs, 2026-09-14), the
seven 1.6 tracks with measurable acceptance criteria, their order
(A -> E -> B -> G -> F -> H -> D), and the tool-pack decision.
Track A: symbol catalogue authored in code (ISO 10628-2 + ISA-5.1), two
generic contracts (block_define, entity_get/set_xdata), nine pid_* tools,
routing, the ISA-5.1 tag grammar, the pid_graph reader, six critique
focuses, TOOL_PACKS, and the test/evidence plan.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd
