docs: операция shell (пакет B шаг 1) — 51 инструмент, 79 тестов

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

CLAUDE.md

@@ -25,7 +25,7 @@ The base is committed to the repo (canonical) — no regeneration step. It cover
 
 **v1 + v2 + STEP/assembly + direct B-rep edit + structural model inspection implemented and working** (full sketch→feature→inspect→STEP round-trip + move_face + describe_model validated end-to-end). Stack:
 **.NET 8 (`net8.0-windows`, x64), C#**, MCP via the official `ModelContextProtocol` SDK over **stdio**.
-**50 MCP tools, 78 tests green (47 unit + 31 integration).** v2 added: sketch-on-face (by point and by index), revolve (boss/cut + sketch axis), fillet/chamfer (edge-by-point and by index), and Query tools `get_part_info` (МЦХ), `get_bounding_box`, `list_faces`, `list_edges`. After v2: `import_step`, `export_step` (`ConversionService`, `ConversionTools`), `list_components` (assembly traversal via `TopPart → IParts7`). `move_face` (`FaceEditService`, `EditTools`) — direct B-rep face editing. After move_face: **structural model inspection** — `describe_model`, `list_features`, `list_bodies`, `list_variables`, `describe_face`, `describe_edge`, `measure` (`ModelInspectionService`, `InspectionTools`). `describe_model` is the preferred first call over `model_snapshot` (no token cost for image context; gives feature tree, bodies, variables, topology summary, МЦХ). Latest (package A «richer sketches»): 7 new sketch primitives — `sketch_add_arc` (centre/radius/angles), `sketch_add_arc_3points` (3-point arc), `sketch_add_ellipse` (centre, semi-axes, angle), `sketch_add_polyline` (chain of segments, closed), `sketch_add_polygon` (regular polygon, inscribed/circumscribed), `sketch_add_spline` (cubic NURBS, order 4, closed), `sketch_add_point`. All angles in degrees. `PartModeler` refactored into partial classes: `PartModeler.cs` (core), `PartModeler.Sketch.cs` (2D primitives), `PartModeler.Features.cs` (extrude/revolve/fillet/chamfer). Clean mapping/validation extracted to `SketchGeometry` (static class in `Core/Modeling`); point lists for polyline/spline are `record SketchPoint(X,Y)` arrays with JSON names `x`/`y`.
+**51 MCP tools, 79 tests green (47 unit + 32 integration).** v2 added: sketch-on-face (by point and by index), revolve (boss/cut + sketch axis), fillet/chamfer (edge-by-point and by index), and Query tools `get_part_info` (МЦХ), `get_bounding_box`, `list_faces`, `list_edges`. After v2: `import_step`, `export_step` (`ConversionService`, `ConversionTools`), `list_components` (assembly traversal via `TopPart → IParts7`). `move_face` (`FaceEditService`, `EditTools`) — direct B-rep face editing. After move_face: **structural model inspection** — `describe_model`, `list_features`, `list_bodies`, `list_variables`, `describe_face`, `describe_edge`, `measure` (`ModelInspectionService`, `InspectionTools`). `describe_model` is the preferred first call over `model_snapshot` (no token cost for image context; gives feature tree, bodies, variables, topology summary, МЦХ). Package A «richer sketches»: 7 new sketch primitives — `sketch_add_arc`, `sketch_add_arc_3points`, `sketch_add_ellipse`, `sketch_add_polyline`, `sketch_add_polygon`, `sketch_add_spline`, `sketch_add_point`. `PartModeler` refactored into partial classes: `PartModeler.cs` (core), `PartModeler.Sketch.cs` (2D primitives), `PartModeler.Features.cs` (extrude/revolve/fillet/chamfer). Static `SketchGeometry` class in `Core/Modeling`. Latest (package B start): **`shell`** — convert body to shell: open selected faces (by index from `list_faces`), set wall thickness; params `faceIndices` (int[]), `thickness` (mm), `outward` (default: false = inward). Implemented via API5: `ksPart.NewEntity(o3d_shellOperation=43)` → `ksShellDefinition` → `FaceArray()` → `Create()`.
 See [`README.md`](README.md) and [`docs/ARCHITECTURE.md`](docs/ARCHITECTURE.md); design decisions/caveats in
 [`docs/OPEN_QUESTIONS.md`](docs/OPEN_QUESTIONS.md).
 
@@ -45,18 +45,19 @@ dotnet run --project src/Kompas.Mcp.Host         # start the MCP server (stdio)
 Key implementation facts (don't relearn):
 - **All COM calls run on one dedicated STA thread** (`KompasDispatcher.InvokeAsync`); КОМПАС is single-instance STA. Services never touch COM off that thread.
 - Connection goes through **API5** (`KOMPAS.Application.5` → `KompasObject`) then `ksGetApplication7()` → `IApplication`; the API5 root is needed for `ksPart` 3D-building and `ksDocument3D` snapshots.
-- 3D is built via **API5 `ksPart`** (`NewEntity(o3d_sketch/o3d_bossExtrusion/o3d_bossRotated/o3d_fillet/o3d_chamfer/...)`, `ksBossExtrusionDefinition`/`ksCutExtrusionDefinition`/`ksBossRotatedDefinition`/`ksFilletDefinition`/`ksChamferDefinition`); cut-through holes use `dtBoth` + `etThroughAll`. API7 is used for app/documents.
+- 3D is built via **API5 `ksPart`** (`NewEntity(o3d_sketch/o3d_bossExtrusion/o3d_bossRotated/o3d_fillet/o3d_chamfer/o3d_shellOperation=43/...)`, `ksBossExtrusionDefinition`/`ksCutExtrusionDefinition`/`ksBossRotatedDefinition`/`ksFilletDefinition`/`ksChamferDefinition`/`ksShellDefinition`); cut-through holes use `dtBoth` + `etThroughAll`. API7 is used for app/documents.
 - **Face/edge selection**: `ksPart.EntityCollection(o3d_face|o3d_edge)` → `SelectByPoint(x,y,z)` (world mm) filters to objects through the point, then `GetByIndex(0)`; or by stable index from `list_faces`/`list_edges`. `ksFaceDefinition.IsPlanar/IsCylinder/...` + `GetArea(ST_MIX_MM)` classify faces. `ksEdgeDefinition.IsLineSeg/IsCircle/IsArc/...` + `GetLength()` classify/measure edges. Sketch axis = line with system style **3** (осевая). Fillet/chamfer by edge index via `fillet_edge_index`/`chamfer_edge_index` (more reliable than by-point).
 - **МЦХ / mass props**: use **API5 `ksPart.CalcMassInertiaProperties(ST_MIX_MM|ST_MIX_KG)`** → `ksMassInertiaParam` (`v`/`m`/`F`/`xc`/`yc`/`zc`), computed on demand. **Do NOT** use API7 `IMassInertiaParam7.Calculate()` — its `Actual` flag sticks after the first calc and won't refresh on API5 geometry changes (stale volume). Bounding box: `ksPart.GetGabarit(full:false, ...)`.
 - **Snapshot**: `ksDocument3D.SaveAsToRasterFormat(file, ksRasterFormatParam)` renders to a temp file (the in-memory `resultArrayBytes` stays empty when a filename is given); read bytes back. Return to MCP via `ImageContentBlock.FromBytes(bytes, mime)` — **not** `Data = bytes` (Data holds base64 bytes). Use `model_snapshot` only for visually-spatial questions; **prefer `describe_model` first**.
 - Logs go to **stderr** (stdout is the MCP channel). Integration tests reuse one КОМПАС via `KompasFixture`; artifacts land in gitignored `.scratch/`.
 - **Structural model inspection** (`ModelInspectionService`, `InspectionTools`): `describe_model` — one-call structural "passport" (bounding box + МЦХ + bodies + topology summary + feature tree + variables); preferred over snapshot. `list_features` — feature tree with params (depth/radius/legs). `list_bodies` — list solid/surface bodies with face count. `list_variables` — model variables (name/expression/value, external/info flags). `describe_face` — drill-down by index (type, area, normal, radius, edge count). `describe_edge` — drill-down by index (type, length, adjacent faces, vertices). `measure` — distance/angle between two objects (face|edge|vertex by index, unit `ST_MIX_MM`).
 - **Feature tree API** (don't relearn): read via API5 `ksPart.GetFeature()` → `(ksFeature).SubFeatureCollection(true,false)` → `ksFeatureCollection`. Cast `(ksFeature)part` does NOT work (RCW QI returns null) — must use `GetFeature()`. `ksFeature.type` returns only coarse `o3d_entity` and does NOT distinguish operations; precise type and params come from `ksFeature.GetObject()` → `ksEntity.GetDefinition()` and matching definition type (`ksBossExtrusionDefinition.GetSideParam`, `ksFilletDefinition.radius`, `ksChamferDefinition.GetChamferParam`, …). Node name ("Элемент выдавливания:1", "Скругление:1") is localized by КОМПАС itself.
-- **STEP import/export, `list_components`, `move_face`, full inspection layer, and richer sketch primitives (package A) are done.** Not yet done: body split/reposition as MCP tools (SplitSolids/BodyRepositions — driveable but not yet implemented); patterns/arrays (package C), parametrics (package D), 2D drawing, assembly building. Known caveat: boss/cut direction on a selected face depends on face-normal orientation (`forward` may need flipping — agent picks via snapshot or `describe_face` normal). See `docs/OPEN_QUESTIONS.md` → «Ревью v2».
+- **STEP import/export, `list_components`, `move_face`, full inspection layer, richer sketch primitives (package A), and `shell` (package B start) are done.** Not yet done: remaining package B forming ops (rib/draft/loft/sweep/hole), body split/reposition as MCP tools (SplitSolids/BodyRepositions — driveable but not yet implemented); patterns/arrays (package C), parametrics (package D), 2D drawing, assembly building. Known caveat: boss/cut direction on a selected face depends on face-normal orientation (`forward` may need flipping — agent picks via snapshot or `describe_face` normal). See `docs/OPEN_QUESTIONS.md` → «Ревью v2».
 - **"STEP import without history"** detected structurally: `bodyCount > 0 && no formative features && features.Count <= bodyCount+1` (only origin + body). STEP with edits (move_face: "Смещённая плоскость", "Разрезать", "Переместить грани", "Булева операция") — that already has history.
 - **Topology/measure API**: `ksFaceDefinition.EdgeCollection` / `GetCylinderParam` / `GetSurface().GetNormal` + `normalOrientation`; `ksEdgeDefinition.GetAdjacentFace(bool)` / `GetVertex(bool)` → `ksVertexDefinition.GetPoint`; bodies via `ksPart.BodyCollection()` → `ksBody` (`IsSolid` / `FaceCollection`); variables via `ksPart.VariableCollection()` → `ksVariable`; measurements via `ksPart.GetMeasurer()` → `ksMeasurer` (`SetObject1/2`, `unit=ST_MIX_MM`, `Calc`, `distance`/`MinDistance`/`angle` in degrees / `IsAngleValid`).
 - **STEP import COM pattern** (verified): `IApplication.get_Converter((object)(int)ksConverterFromSTEP=-3)` (pass format code, not DLL path) → `IConverter.ConverterParameters(cmd)` → set `IAdditionConvertParameters.Format=ksConverterFromSTEP` → `IKompasDocument3D1.ConvertFromAdditionFormat(path, prm)`. Export: `ConvertToAdditionFormat` with format codes for AP203/AP214/AP242. Param co-classes (AdditionConvertParameters etc.) are NOT CoCreatable — only via converter factories. Assembly traversal: `IKompasDocument3D.TopPart → IPart7.Parts (IParts7)`. Extract component: `prm.NeedCreateComponentsFiles=true` (writes .m3d files next to STEP) + `IPart7.OpenSourceDocument`.
 - **Direct B-rep face editing (`move_face`)** (verified on top_spacer, 39.45→41.45 mm height): API7 face object retrieved via `IPart7.FindObjectsByPoint(x,y,z,true)` → cast to `KompasAPI7.IFace`; containers acquired at runtime via COM-QI: `(ISurfaceContainer)part`, `(IModelContainer)part`; `FaceMover` (SetFaces + Offset + Direction + Update) moves the face. distance>0 = outward (add material), <0 = inward. Works on both parametric and imported B-rep geometry. Full split-reposition workflow (SplitSolids/BodyRepositions) is driveable but not yet exposed as tools.
+- **Shell operation (`shell`, package B first step)**: `ksShellDefinition` via `ksPart.NewEntity(o3d_shellOperation=43)`; `thickness` (mm) + `thinType` (bool: `true`=inward/`false`=outward; mapping: `thinType = !outward`) + `FaceArray()` (open faces, ≥1, by index from `list_faces`). Helper `SelectFaceByIndex` in `PartModeler.cs` (analogous to `SelectEdgeByIndex`, with range check). Validation: `thickness>0`, dedup via `Distinct`, range check before mutation. Transient RCWs in `ShellAsync`/`SelectFaceByIndex` are intentionally not released (consistent with Fillet/Chamfer pattern).
 - **Richer sketch primitives (package A, ksDocument2D API5 wrappers)**: `ksArcBy3Points` (3-point arc), `ksArcByAngle` (centre/radius/start-end angles in degrees, counterClockwise flag), `ksEllipse` via `ksEllipseParam` — struct obtained via `KompasObject.GetParamStruct(ko_EllipseParam=22)`; **property names are `A`/`B` (uppercase) in the interop**; `ksRegularPolygon` via `ksRegularPolygonParam` (`ko_RegularPolygonParam=92`) — `describe = !inscribed`; NURBS spline via `ksNurbs(order=4)` + `ksNurbsPoint` loop + `ksEndObj`; `ksPoint`. Param structs are released after use. `PartModeler` split into partial classes: `PartModeler.cs` (registry/helpers/NewParam<T>/reset), `PartModeler.Sketch.cs` (all 2D primitives), `PartModeler.Features.cs` (extrude/revolve/fillet/chamfer). Static `SketchGeometry` class (`Core/Modeling`) holds enum mappings (`ArcDirection`, `PolygonDescribe`) and validators (`RequirePositive`, `RequireVertexCount`, `RequirePoints`). Polyline/spline point lists use `record SketchPoint(X, Y)` with JSON names `x`/`y`.
 
 ## КОМПАС-3D API architecture (the critical context)