feat(arch): SECTION 25 opens - walls, openings, stairs and exterior chains as tools

engineering/arch/draw.py is the only module of the track that touches a
backend. It draws through draw_prims(role_layer=ARCH_ROLE_LAYER) and the
generic contract members, so it runs on both engines as written, and it writes
the plan onto the drawing: each element's ACADMCP_ARCH record on one of its own
entities (a wall's first face line, a door's leaf, a window's frame, a stair's
first riser) and, beside it under ACADMCP_ARCH_H, the handles that element
owns. read_plan reads the records back and never modifies the drawing.

arch_wall computes the whole network before and after the new walls and
redraws only the drawn walls whose outline changes - erasing exactly the
entities they own - and says which under redrawn. arch_opening hosts a door or
a window in a drawn wall found by id and redraws that wall cut; its tag
defaults to the next D1/W1 (K1/P1 in Turkish). A new wall that would leave a
drawn opening uncuttable, and an opening that runs into a junction, are refused
before anything is erased. arch_stair reports the Blondel value; it does not
enforce it.

exterior_chains gives each side up to three rows, nearest first: every jamb in
that facade, both faces of every wall meeting it, and the overall - from the
wall engine's own faces. A row that would only restate a farther one is not
emitted (ISO 129-1: each measurement once). The 10 mm / 8 mm row spacing is a
declared drafting default times the plot scale, not a standard value.

The arch tag is ranked after mech so the four tools file under a new
architecture group; alias records carry WALLADD/MLINE, DOORADD/WINDOWADD and
STAIRADD with English and Turkish shop words. Inventory regenerated; README
snapshot 233 tools (228 advertised) in 26 groups; registry snapshot
architecture: 4.

No new ActiveX member is called. Measured on AutoCAD 2026 in a scratch
document through ComBackend: shell + teed partition, D1 + W1, a straight 17-riser stair
and the bottom chains gave the same 20 wall LINEs (identical endpoints),
9 poche HATCHes, 1+1 door, 4 window lines, 11 dimensions and a read_plan
round trip as the headless engine.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd

discovery/aliases.py

@@ -2230,6 +2230,80 @@ TOOL_ALIASES: dict[str, ToolAliases] = {
             "punta deligi",
         ),
     ),
+    # ── Architecture (SECTION 25, track F group W) ──────────────────────────
+    "arch_wall": ToolAliases(
+        acad=("WALLADD", "MLINE"),
+        synonyms=(
+            "draw a wall",
+            "wall with a thickness",
+            "exterior wall",
+            "partition wall",
+            "floor plan walls",
+            "clean wall corners",
+            "t junction of walls",
+            "wall poche",
+            "duvar",
+            "duvar çiz",
+            "duvar ciz",
+            "bölme duvar",
+            "bolme duvar",
+            "kat planı",
+            "kat plani",
+        ),
+    ),
+    "arch_opening": ToolAliases(
+        acad=("DOORADD", "WINDOWADD"),
+        synonyms=(
+            "add a door",
+            "door in a wall",
+            "door swing",
+            "add a window",
+            "window in a wall",
+            "cut an opening in the wall",
+            "kapı",
+            "kapi",
+            "kapı ekle",
+            "pencere",
+            "pencere ekle",
+            "doğrama",
+            "dograma",
+        ),
+    ),
+    "arch_stair": ToolAliases(
+        acad=("STAIRADD",),
+        synonyms=(
+            "draw a stair",
+            "staircase",
+            "flight of stairs",
+            "l-shaped stair",
+            "u-shaped stair",
+            "walking line",
+            "blondel rule",
+            "risers and treads",
+            "merdiven",
+            "merdiven çiz",
+            "merdiven ciz",
+            "basamak",
+            "rıht",
+            "riht",
+        ),
+    ),
+    "arch_dimension_chains": ToolAliases(
+        acad=(),
+        synonyms=(
+            "dimension the facade",
+            "exterior dimensions",
+            "dimension chains",
+            "overall building dimensions",
+            "opening dimensions on the plan",
+            "ölçülendir",
+            "olculendir plan",
+            "dış ölçü",
+            "dis olcu",
+            "aks ölçüsü",
+            "aks olcusu",
+        ),
+    ),
 }