…irst auto reader

- Config cad.lazy_shape_store (default on, ADA_CAD_LAZY_SHAPE_STORE=false to
  opt out) + cad.shape_store_compress: _read_step_streaming stores each solid
  as its NGEOM blob (native path, zero hydration at import) or pickled
  ada.geom tree (pure-Python path) and mints ShapeProxy objects.
- reader='auto' now probes the native adacpp parser first (matching
  iter_from_step), with a first-solid hydrate probe and pure-Python fallback;
  StepReader.NATIVE + from_step Literal accept 'native' explicitly.
- native_stream_read_step_blobs: per-solid (blob, meta) without hydration;
  native_stream_read_step reimplemented on top.
- ConnectedFaceSet becomes a first-class B-rep root: solid_geom() accepts it,
  the OCC builder builds it, and NGEOM hydration promotes topologically
  closed face-sets back to ClosedShell (edge-pairing check, value-keyed).
- AP242 stream writer shares EDGE_CURVEs by value signature instead of object
  identity, so NGEOM-hydrated trees (which decode one object per reference)
  re-emit watertight solids identical to Python-reader trees.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

- AdaCppBackend.tessellate_stream_buffer: tessellate a pre-encoded NGEOM
  buffer (a ShapeStore blob) directly — no hydration, no re-serialization;
  tessellate_stream now routes through it.
- BatchTessellator: ShapeProxy solids tessellate straight from their stored
  blob when the stream kernel is selected; the bare-curve sniff skips proxies
  (it would hydrate the whole tree, and stored solids are never bare curves).
- IFC writer: ShapeProxy accepted alongside Shape for parametric export;
  bare ConnectedFaceSet roots map to the ClosedShell face-set emit.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

import_ifc_shape stores natively-read product geometry as one compact pickled
blob per product (bool_operations, half-space operands and parametric profiles
round-trip exactly) on a per-IfcStore ShapeStore and mints ShapeProxy objects;
kernel-fallback products keep eager Shapes. Gated by the same
cad.lazy_shape_store config (default on).

Crane numbers for the STEP side of the store (native reader, 7291 solids):
eager 2723/2556 MB peak/settled 96 s -> lazy 709/543 MB 56 s; all 7291 blobs
hydrate cleanly and RSS returns to the blob floor after dropping the trees.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

…ilter

The exact-type filter excluded lazy proxies from by_type=Shape queries
(topology from_assembly found no solids). A proxy normalises to its public
type; Shape subclasses like PrimBox stay excluded as before.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Geometry.bool_operations were dropped by every stream-tessellation caller
(the wrapper was stripped before serialization), so IFC clipping cuts and
API booleans only evaluated on the OCC build path. Now:

- serialize root() accepts core.Geometry wrappers and folds bool_operations
  into a nested BOOLEAN_RESULT (tag 52) chain — base as first operand, ops
  in order — which adacpp already decodes and evaluates via Manifold.
- HalfSpaceSolid operands are lowered at encode time to a finite box on the
  material side of the plane, sized by the base solid's loose bbox — the
  exact lowering adacpp's native STEP/IFC readers apply (mk_halfspace), so
  no new NGEOM tag and no adacpp change is needed; the neutral path stays
  OCC-free (pure ada.geom bbox math).
- BatchTessellator passes the wrapper through to tessellate_stream.

Native-read CSG STEP roots (BOOLEAN_RESULT in an adacpp blob) still have no
Python-side decode: the auto reader's hydrate-probe falls back to the pure-
Python reader for such files, which parses BooleanResult natively.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Removes the per-instance __dict__ from every curve/surface/solid/placement/
boolean dataclass — the dominant per-object overhead when a B-rep model is
hydrated (millions of instances). core.Geometry stays un-slotted: it is the
weakref-cache value in the lazy ShapeStore (weakref_slot needs py>=3.11) and
there is only one per solid.

Two NGEOM serializer tests attached weights_data ad hoc to the non-rational
B-spline classes; they now construct the Rational subclasses (real field).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

B-rep IFC products the Python-native readers can't resolve previously fell
to the eager IfcOpenShell OCC kernel (unpicklable transient bodies, whole-
model materialisation). They now try adacpp's dep-free IfcNgeomStream
first: one guid-keyed scan per import, buffers retained zero-copy in the
per-IfcStore ShapeStore, single-instance placement restored from the
stream's composed world matrix. Color/props/spatial hierarchy still come
from ifcopenshell (the stream's v1 carries geometry+guid+name+placement
only); kernel fallback unchanged for products the native resolver skips,
and adacpp builds without IfcNgeomStream degrade gracefully.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Audit regression: non-promoted native NGEOM roots hydrate as bare
ConnectedFaceSet with FaceSurface members; the adacpp backend's build
dispatch only knew the ClosedShell/OpenShell + AdvancedFace spellings and
raised 'not yet ported'. ConnectedFaceSet sews like the other shells;
FaceSurface is AdvancedFace's structurally-identical sibling.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

…ion LRU

- SAT wire bodies round-tripped through IFC are bare-curve shapes; the
  proxy curve-sniff skip forced them down solid_geom() and they vanished
  from scenes (parity ifc 1->0). ShapeRecord now records curve-ness at
  store time and the tessellator asks the record — line rendering restored
  with zero hydration.
- ~40% conversion slowdown: consumers read .geom 3-5x per call and each
  temporary died between property evaluations, so the weak cache re-decoded
  the blob per access. ShapeStore adds a small strong LRU window
  (hydration_cache_size=16, ~5 MB) over the weak cache; hydrate-all still
  returns to the blob floor (eviction test included).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

promote_closed_shell (edge-pairing closedness check) cost ~17% of
native_stream_read_step on the crane, and the streaming exporters
(obj/stl/step emit) that iterate it don't care about shell closedness.
Promotion now happens only where it matters: lazy-store hydration
(already there) and the eager from_step Assembly wrap.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

When profile_conversions is on, the worker parses the adacpp profiler's
[STEPPROF-JSON] summaries out of the captured child log into
convert_meta.cpp_profile, and the Metrics tab renders them next to the
Python profile: per-pipeline phase wall/RSS breakdown with share bars,
kernel-exact peak (VmHWM), per-solid stats, achieved parallelism, disk
IO pressure and per-thread utilisation. Torn/interleaved lines are
skipped; profiling off leaves no trace in meta or output.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

The audit log panel gains a state dropdown (queued / running / done /
error) next to the action/target filters. Server-side: the /admin/audit
route exposes a status param wired to list_audit's existing statuses
filter, so it composes with keyset pagination instead of filtering one
page client-side.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

…ete-key + shift-arrow selection

Corpus tab tree view gains the storage panel's organize toolkit via a
shared FileTreeView mutations layer: inline rename of files/folders,
client-side pending folders (New folder / New subfolder), kebab menus
(download, move-to-folder picker, upload-here, delete with cascades),
and drag-and-drop moves of files and whole folder subtrees with a
move-to-root strip. Drag payloads embed the source scope in a distinct
MIME so drags straying between panels/scopes are ignored, not
mis-moved. Checkbox multi-select feeds a bulk Move/Copy/Delete toolbar
and multi-key drags.

Both panels: "Upload files" now prompts for the destination (existing
folder / new path / top level, default top level) via FolderPickerModal
allowRoot; keyboard lists support shift+Arrow selection extension and
Delete-key deletes (selection first, else the focused file/folder) with
confirm dialogs listing exactly which keys go (previewKeyList).

Corpus files can be server-side copied into the caller's personal scope
(Garage CopyObject, keys preserved, existing keys skipped) per file or
per selection.

InlineNameInput extracted from StorageBrowser into components/common so
both panels share it. Read-only FileTreeView callers are unaffected.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

…anel

PositionedMenu and FolderPickerModal portal to document.body at z-50,
but the admin Rnd panel host is a fixed z-[60] overlay — so the corpus
tab's kebab/context menus and its move/upload destination prompts
rendered behind the panel. Raise both to z-[70]. (The copy-from-scope
modal was unaffected: it renders inline inside the panel's stacking
context.)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

…escription

Both storage panels now show an in-panel spinner status line while a
batch file operation runs — previously a drag-drop move of many files
gave no feedback until the listing refreshed. Corpus tab: bar under the
button row covering moves, folder moves, bulk/folder deletes, and
copy-to-personal; storage panel: line under the header for drag-drop,
picker, and folder moves. Multi-key moves/copies are chunked (8 keys
per request) purely so the counter ticks between requests — every chunk
is still a server-side S3 rename/copy (CopyObject on Garage); no file
bytes pass through the browser. A busy ref rejects overlapping batches,
which would race on server-side collision checks.

Corpus name and description are now editable inline from the corpus
files header (pencil toggle) via a new PATCH /admin/corpora/{slug}
endpoint + db.update_corpus. The slug stays immutable — it is baked
into the storage prefix and scope URLs, so renaming it would orphan the
bucket bytes.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

…try dialog

Corpus upload batches now pre-check destination keys against the
listing and skip files already in the corpus instead of overwriting —
same semantics as the copy flows; the outcome line reports
uploaded/skipped counts. Failures no longer collapse into one error
string: they open a dialog listing each failed file with its reason and
Retry / Close actions. Retry re-attempts only the failed files (the
File objects are held, no re-pick needed), and the skip pre-check makes
retrying a partially-succeeded upload a safe no-op.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

The corpus tree (and other FileTreeView selections) only supported
per-row checkbox toggles and shift+arrow — shift+click did nothing,
reading as a regression next to the storage panel's range select. Add
the same anchor semantics: shift+click selects the visible file range
from the last toggled row (adds, never removes); keyboard and checkbox
paths keep the anchor in sync.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

…mple set

Ten files, five root causes, all fixed at the source:

- Inch/foot units (scale 0.0254): the reader compared the file's length
  unit against the mm/m enum and raised for conversion-based units.
  store.py now compares raw scales and converts through the existing
  generic convert_file_length_units (6 files / 30 cells).
- IfcTriangulatedFaceSet: imported fine but no backend had a build for
  it, so shapes silently tessellated to an empty scene. It IS a mesh —
  emit it directly via a new direct-mesh path in BatchTessellator (plus
  solid_geom() allowlist entries for TriangulatedFaceSet + FacetedBrep).
- Type-library files (geometry only on an IfcTypeProduct
  RepresentationMap, no placed products — the texture samples): new
  instance-less type import, gated to files where no placed product
  carried geometry so normal models don't grow phantom shapes.
- IfcRectangleProfileDef: parametric_profile_to_arbitrary now emits the
  centred rectangle outline (2 files, glb/obj/stl), and the AP242 stream
  writer converts parametric profiles through the same seam instead of
  assuming .outer_curve (ifc->step).
- IfcTrimmedCurve parameter trims: the reader now preserves the IfcLine
  vector magnitude (parameterization scale) and normalizes conic trim
  angles to radians via the file's plane-angle unit (the degrees/radians
  sample pair now produce identical meshes). Both backends evaluate
  parameter trims: adacpp encodes line/circle natively and samples
  ellipse arcs; OCC builds trimmed line/circle/ellipse edges with the
  explicit XDirection frame. The 2D-placement ellipse reader crash is
  fixed the same way circle() handles it.
- Products with no spatial container (IFC4x3 alignment-hosted signals
  on IfcLinearPlacement) attach to the assembly root instead of
  crashing on parent.Name.

Regression tests over the (public) buildingSMART samples in
files/ifc_files/bs_samples/, green on both CAD backends; full core
suites pass (pyocc 1129, adacpp 1144).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

An auto-validate run's total previously covered only the conversion grid;
the parity cells were appended (extend_audit_run_total) when the run
finished and the poller dispatched the validation pass, so the displayed
total grew mid-run. The total now includes the parity cells from initial
dispatch via a validate_total reservation column (migration 021):

- set_audit_run_total reserves the parity count inside total, so the
  counter-bump finish check keeps the run 'running' through the gap
  between the last conversion cell and the validation dispatch
- claim_audit_run_for_auto_validate claims reserved runs once their
  conversion cells alone have landed (still 'running'); legacy rows
  with validate_total=0 keep the finished+extend behaviour
- consume_audit_run_validation_reserve swaps the reservation for the
  actual parity cell count at dispatch (total only moves on scope
  drift; zero actual finishes the run) — failures release the reserve
  so a run can't hang on cells that will never be enqueued
- one storage listing feeds both the conversion grid and the parity
  reservation so the two counts can't disagree

Manual Validate on a finished run still extends the total as before.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

…osses)

Audit run 63 (first run on the fixed worker image) confirmed 51 of the 54
conversion fixes and left 16 cells: 3 ifc re-exports the type-import fix
unmasked, and 13 cross-format parity losses the newly-appended validation
phase caught for the first time.

ifc re-export (texture trio):
- IfcStore.get_context creates the missing standard subcontext under the
  model context for imported files that carry none (the buildingSMART
  type-library samples have only bare '3D'/'2D' contexts)
- TriangulatedFaceSet/FacetedBrep write parametrically (1:1
  IfcTriangulatedFaceSet emit) instead of falling into the tessellation
  fallback, which needs a kernel build these kinds didn't have

parity losses:
- TriangulatedFaceSet builds on both backends (triangle faces sewn to a
  shell, mirroring PolygonalFaceSet) so mesh bodies reach STEP
- GradientCurve directrix encodes as the shared alignment-evaluator's
  sampled polyline on both backends; OCC MakeSolid failure on an open
  sweep degrades to the swept shell instead of dropping the body
- bare-curve shapes (SAT wire bodies) route through active_backend().build
  in the STEP export instead of a pythonocc-only wire builder, with
  build_wire/edge-record support on the adacpp backend
- bare IfcClosedShell/IfcOpenShell representation items import again
  (write_shapes emits imported shells this way)
- the DOM Genie-XML writer emits BeamRevolve/BeamSweep as straight chord
  beams like the streaming writer, instead of dropping them
- the parity STEP counter falls back to a reload count when the native
  stream sees 0 roots (wireframe-only outputs are invisible to it)

8 new cross-format parity regression tests over the previously-failing
sources; both core suites green (adacpp 1151, pyocc 1136; the one failure
is the pre-existing plotly-to-file/kaleido issue, verified on a clean tree).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

…pty-model parity phantom

Audit run 64 (image sha-b29eb92) cleared all 16 prior failures but flipped 12
parity cells to an inverted mismatch (source=0, step=1). Three root causes:

- the parity element counter's reload fallback counted a zero-vertex phantom:
  a geometry-less STEP product materializes one empty Shape whose scene entry
  has no vertices. visualized_element_count skips renderably-empty entries,
  and tessellate_edges no longer passes an edge-less compound to
  discretize_edge (TopoDS_Edge assert)
- wire-only STEP files read back as zero roots: GEOMETRIC_CURVE_SET was a
  referenced-entity builder but not a stream-reader ROOT, so adapy's own
  wireframe exports (SAT wire bodies) were invisible on re-read. It is now a
  yieldable root and a first-class curve body: CURVE_GEOM_TUPLE membership,
  native line discretization (incl. line-basis TrimmedCurve), per-element
  GL_LINES emit, OCC compound-of-wires build, and adacpp edge-record encode
- the 12 files were passing vacuously (0=0=0): their products import as ZERO
  objects because a typed import failure (e.g. IfcBeam with a tessellated
  body and no material association) dropped the product entirely. Typed
  Beam/Plate/Wall imports now fall back to the generic Shape import on any
  failure, and the IfcTriangulatedFaceSet reader handles the optional
  Normals attribute. The tessellated I-beam sample now imports, renders and
  round-trips (parity 1=1=1) instead of silently showing an empty scene

New regression test covers the empty-model zero count on every leg and the
wireframe STEP round-trip. Both core suites green (adacpp 1152, pyocc 1137;
the single failure is the pre-existing plotly-to-file/kaleido issue).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

cProfile of the JacketHybrid parity cell (the audit's slowest Python cell,
~99s on the worker) showed round_array at ~28s cumulative: every call built
a fresh np.vectorize(roundoff) to round a 3-vector, 637k times through
compute_orientation_vec in FEM-shell->Plate conversion and the IFC/XML
plate emitters. A plain per-element loop keeps roundoff's exact Decimal
HALF_EVEN values (swapping in np.round shifted borderline vectors enough
to drop 59 of 104k shells in plate conversion — rejected) and cuts
FEM->concept conversion on that model from 59s to 46.5s.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

…mbled scene

cProfile of the hullskin parity cell showed ~44% of its wall time inside
assembly_element_count: to_trimesh_scene tessellates the whole model at
viewer quality and then assembles a full trimesh scene (trimesh objects,
materials, normals) three times per cell — once for the source baseline and
once per reloaded format leg — only for the entries to be counted.

The count now consumes BatchTessellator.batch_tessellate directly over the
same object set tessellate_part feeds it (physical objects with pipes as
segments, plus welds): meshes_to_trimesh turns exactly one MeshStore into
one scene entry, so counting non-point, non-empty stores is the same metric
with the scene-assembly third of the cost removed. Exclusions unchanged:
point clouds (the empty-scene placeholder) and zero-vertex stores.

Measured on the two slowest audit parity cells, counts identical to the
production baselines: hullskin.xml 130s -> 80s (5410 on every leg),
JacketHybrid.FEM 86s local vs 98.6s worker (104188 on every leg). The
parity regression suite (incl. the wire-STEP and empty-model edge cases
that flow through this counter) is green on both backends.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

convert_shell_elem_to_plates ran the full orientation/projection chain per
element (normal_to_points_in_plane -> calc_yvec -> compute_orientation_vec x2
-> 2D projection -> winding -> back-transform): on a 100k-shell model that
meant 1.5M Direction / 1.3M Point constructions, 2.9M weakref-cache ops and
2M Decimal roundings — ~2/3 of FEM->concept wall time.

The math now runs once over (m, k, 3) arrays:

- vector_transforms.shell_orientations_bulk replicates the scalar chain
  array-wise in the same floating-point operation order, Decimal-rounding
  via round_array semantics deduplicated over unique orientation rows
  (co-planar plate patches share frames), and escapes degenerate rows
  (duplicate corners, near-parallel edges, sub-1e-9 yvec) to the scalar path
- CurvePoly2d.from_fem_shells_batch consumes it: batched matmul projection,
  the verbatim is_clockwise winding rule (its closing term is NOT the
  wrapped shoelace edge — replicated bit for bit), batched back-transform;
  only the output objects (interned Points, LineSegments, Nodes) are built
  per element
- convert_part_shell_elements_to_plates gathers entries in element order
  with the exact scalar guards/warnings, coplanarity split, tri-branch
  material quirk and try/except, then batches per polygon arity

Gate: all 109,949 JacketHybrid plates BITWISE-IDENTICAL to the scalar chain
(points2d/3d, orientation vectors, segment indices, thickness, material).
Conversion 39.0s -> 11.9s on the plates alone; create_objects_from_fem
59s (session start) -> 15.4s; the Jacket parity audit cell 98.6s (worker
baseline) -> 59.2s locally with identical counts. Streaming exporters keep
the per-element scalar path (iter_objects_from_fem builds detached plates
one at a time by design). Core suites green on both backends; FEM suite
green in the fem env.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

…it panel

On mobile the gallery HUD is a full-width bottom bar and the ambient "audit sweep
in progress" toast sat on top of it. Now they stack: GalleryControls publishes
its live mobile-bar height (ResizeObserver; 0 when the bar is display:none on
desktop) into the gallery store, and the viewer toast stack lifts its bottom to
sit above the bar (audit toast on top). Desktop is unaffected (bar height 0).

Also: the Audit Runs panel gets a "● toast on / ◌ toast off" toggle (persisted)
so operators can hide the ambient toast entirely; the toast reads the flag.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Switching scope disposes the current scope's batched meshes, but the geom walk
held live references to them (in geomEntries + the selection). Focusing/framing a
freed mesh — or a synchronous collectGeomEntries throwing inside an effect during
the transition — could crash the whole viewer.

- focusGeomEntry now guards: skip undefined entries and any mesh no longer
  attached to the live scene (meshIsLive), and re-check after the async name
  lookup before centerViewOnSelection reads geometry.
- rebuildGeoms wraps collectGeomEntries in try/catch so a mid-transition scene
  can't throw out of an effect (which would unmount the app).
- GalleryControls resets the walk (endGeomWalk + clear entries/index/selection)
  on scope change, so nothing references the old scope's disposed meshes.

Pod logs showed no server error — the crash was purely client-side.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

…2D arc cross)

_sample_arc did np.cross on a profile ArcLine's 2D points — np.cross of two 2D
vectors is a scalar, so the circumcenter's np.cross(vec, scalar) raised "At least
one array has zero dimension". Any parametric section with fillets (I/T/U/... —
16-segment outline, 4 fillet arcs) hit it, so its ExtrudedAreaSolid tessellated
empty and fell back to OCC. Lift the arc's points to 3D (z=0) first.

This was the #2 OCC-fallback cause in the audit (~38 fallbacks across the beam
files — beam-standard-case, beam-parametric-cross-section, beam-varying-*,
curve-parameters). beam-standard-case now renders natively (fallback 0).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

IfcPolygonalFaceSet had no _dispatch branch, so it serialized empty and fell back
to OCC. Encode it as a CONNECTED_FACE_SET of planar polygon faces (each n-gon's
1-based indices -> a PolyLoop; face_surface infers the plane). ~24 audit
fallbacks (alignment/linear-placement models) now render on the stream kernel.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

The inferred-plane encoder (87d3caa) projected each n-gon onto a best-fit plane,
which flattens the non-planar polygonal faces of swept/faceted geometry
(alignment signals etc.) — area dropped ~15% vs the ifcopenshell oracle and ~90%
of triangles came out as slivers. That's worse than the OCC fallback, which
renders these correctly. Keep the fallback for now; a correct native path needs
3D fan/ear triangulation (keeping the original vertices), tracked separately.

The ExtrudedAreaSolid arc fix (the larger fallback cause) stands.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

… fallback)

IfcPolygonalFaceSet had no NGEOM encoder, so it fell back to OCC (~24 audit
fallbacks, alignment/linear-placement models). It's already a mesh, so emit it
directly: _direct_triangulated_meshstore now fan-triangulates each n-gon in 3D,
keeping the ORIGINAL vertices — and _tessellate_geom_via_stream tries that direct
path before serializing (libtess2 can't take a face set, and a per-face plane
inference would flatten non-planar faces).

Verified vs OCC: identical geometry (area 22.845, same triangles) — my earlier
"native is worse" read was wrong; the high sliver fraction is the source's thin
faceted strips, which OCC produces identically. Now zero OCC fallback.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

… fallback)

IfcSweptDiskSolid (rebar/pipe) had no NGEOM encoder, so it fell back to OCC (~35
audit fallbacks, reinforcing-assembly etc.). Encode it like a
FixedReferenceSweptAreaSolid: a circular/annular profile FACE swept along the
directrix. The directrix is sampled and given a rotation-minimising
(parallel-transport) frame per station here, so ANY directrix works (polyline,
arc, composite) — not just the alignment GradientCurves the existing frame
sampler handles.

reinforcing-assembly now renders natively (fallback 0) at area 7.58 vs the
ifcopenshell oracle's 7.63 (99.3%).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

IfcAdvancedBrep wasn't in the geom_reader dispatch, so products using it (basin
advanced-brep, alignment signals) imported as raw OCC bodies with no ada.geom and
fell back to OCC at tessellation. Dispatch it to closed_shell(Outer) — an outer
ClosedShell of IfcAdvancedFaces (analytic / B-spline surfaces), serialized like any
closed shell. Fixes 3 audit raw-OCC fallbacks (basin + 2 in the signal model);
fallback now 0, geometry within B-spline-tessellation tolerance of the oracle.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

…level transforms)

Two IfcMappedItem forms still fell back to OCC (raw-OCC body, no ada.geom):
  * a non-rigid (scale/shear) transform on a solid — can't be baked into an
    analytic ada.geom type; and
  * a product that instances ONE mapping source N times (multiple Body items) —
    dropped by the multi-item kernel fallback.

Handle both via Geometry.transforms (per-instance 4x4s applied to the tessellated
mesh, mirroring the STEP assembly-instance path):
  * mapped_item: on a non-bakeable transform, carry the 4x4 on Geometry.transforms
    instead of raising.
  * mapped_instance_group + read_shapes: fold shared-source mapped instances into
    one Geometry with every instance transform.
  * batch_tessellate (_emit_with_geom_transforms): bake each transform into the
    vertex positions (inverse-transpose into normals for non-uniform scale), one
    MeshStore per instance.

mapped-shape-with-transformation and mapped-shape-with-multiple-items now render
natively (fallback 0) at area/bbox identical to the ifcopenshell oracle.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Two more audit OCC fallbacks (trimmed-curve-parameters, surface-model):

* ArbitraryClosedProfileDef with an IfcCompositeCurve outer (trimmed conic / line
  segments) had no NGEOM path — _loop_points_3d couldn't walk a CompositeCurve.
  Add _sample_trimmed_curve (conic arc via radians param or projected Cartesian
  trim; line segment honouring sense_agreement) + _composite_curve_loop_points,
  routed through _loop_points_3d. curve-parameters-in-degrees/-radians now render
  natively at area 33.458 vs the ifcopenshell oracle's 33.467.

* IfcFaceBasedSurfaceModel of plain polyloop faces serialized empty: _any_face
  gated on hasattr(f, "face_surface"), which a plain IfcFace lacks. Route any face
  carrying `bounds` to face_surface (it already infers a plane when no surface is
  present). surface-model now renders natively at area 10.000 = oracle.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Adds a "distorted tris" geom-walk order that visits only geoms with a crows-nest
spike (a triangle shooting out past the geometry), worst-first, with edges forced
on — the tool for finding tessellation spikes.

The metric (frontend meshStats + backend accumulate_mesh_distortion, kept in sync)
is redefined from aspect-only to OUTLIER-VERTEX based: a spike is a thin triangle
touching a vertex whose distance from the mesh's robust (median) centroid exceeds
4x the median vertex distance. This is what separates a real spike from benign
geometry the old aspect>60 test over-flagged — a deep thin extrusion's side
slivers or a coarse curved surface are thin and reach across the bbox, but their
vertices sit ON the body. Verified: synthetic spike flagged, clean grid 0; on real
files the false positives collapse — signal 0.906->0.001, curve-params 0.88->0,
basin 0.093->0.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

The selection inspector's "Mesh" tessellation-stats block was a separate always-on
section. Fold it inside the Properties expanded body (so it collapses with
Properties) and gate it on a new showMeshStats option (DisplayOptions → "Mesh stats
in Properties", default on).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

… (boiler crows-nest)

scene_from_step_stream tessellated the libtess2 path at a fixed angular ceiling
with NO model_scale, so a large assembly over-tessellated every small pipe/torus
into a slivery "crows nest" (boiler 415583 asm_22: a single torus refined 61 ->
24105 tris; the solid hit 170k tris / 54% thin slivers vs OCC's 13.7k / 10% on the
SAME NGEOM blob — a libtess2-path issue, not the source geometry).

native_step_to_glb already estimates + passes model_scale (adaptive coarsening,
default on); the streaming path didn't. Estimate it once (estimate_step_model_scale
on the source, unit-scale corrected), expose via env to the spawn-pool workers, and
pass it into tessellate_stream. Features small vs the model bbox diagonal relax
their angular ceiling; significant features keep the fine tessellation. Gated by
ADA_STREAM_TESS_ADAPTIVE (default on, matching the native path).

Verified: boiler model_scale estimate 15364 -> r=30 tori coarsened; worst solid
56718 -> ~9000 tris (~6x fewer slivers). NOTE: a residual ~35% thin fraction
remains even at OCC-comparable density — libtess2's midpoint-split refinement makes
more slivers than OCC's mesher; that structural mesh-quality gap is tracked
separately. Corpus-wide density change — validate with a fresh audit.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

…ack)

An IfcMappedItem whose MappingSource.MappedRepresentation carries more than one
item raised NotImplementedError, so the product fell back to the OCC kernel (a
raw body with no parametric solid_geom -> the last remaining corpus OCC
fallback: the two IfcSignal bodies in linear-placement-of-signal.ifc, each a
5-IfcPolygonalFaceSet mapped representation).

mapped_item now merges the faceted items of a multi-item source into a single
geometry (_merge_face_sets: concatenate coordinates, offset the 1-based vertex
indices; supports all-PolygonalFaceSet or all-TriangulatedFaceSet) and carries
the shared mapped 4x4 as a mesh-level Geometry.transforms instance (works rigid
or not). Non-faceted / mixed multi-item sources still raise so the caller keeps
the kernel fallback.

Verified vs the ifcopenshell oracle: both IfcSignals read native (582 verts,
world-bbox error 0.0) and the conversion's OCC fallback count drops 2 -> 0.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

…unbound)

_process_one initialised timeout_s only inside the `if db_pool is not None:`
block, but referenced it unconditionally when launching the convert subprocess.
A worker that came up without a DB pool — e.g. it raced Postgres during a
host-reboot restart — therefore hit `UnboundLocalError: timeout_s` on EVERY job,
so an audit sweep sat on "queued" with nothing progressing (jobs failed in the
subprocess wrapper the instant they were pulled). Hoist the initialisation next
to profile_enabled/env_overrides so the DB-less path converts with code defaults.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

…tin)

The non-STEP →GLB engine option advertised default was occ-builtin, but the
runtime default (_default_glb_tess_engine) already returns libtess2 whenever
adacpp is importable. The schema default is cosmetic (runtime ignores it), so the
only effect was the SPA/audit UI misreporting the path taken. Align the advertised
default + description with the runtime; libtess2 still degrades to OCC on an
adacpp-less pool.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

…ytically

A multi-instance IfcMappedItem product (one source solid reused N times) carries its
per-instance world 4x4s on Geometry.transforms. The stream (ap242) writer emitted the
source once and dropped the transforms → N-1 instances lost (the OCC to_stp path drops
them too — a rigid STEP placement can't carry the non-uniform scale these use).

write_step_stream now emits one solid per transform. Analytically where the form allows
it: _transform_extrusion applies the world affine to the Extrusion (profile 2D coords
absorb the linear map, re-fitted to a fresh orthonormal plane frame) so each instance
stays an exact planar-face MANIFOLD_SOLID_BREP with line/arc edges — no tessellation, no
geometry left behind. Only a transform the analytic form can't carry (an oblique extrude
vector under shear, or a circular arc a non-uniform in-plane scale would turn elliptic)
falls back to a faceted bake (add_baked_instances) — facet-but-present, never dropped.

Verified on mapped-shape-with-multiple-items.ifc: 4 analytic MANIFOLD_SOLID_BREPs (24
exact faces total, not a triangle mesh), read back as 4 objects, world bbox matching the
ifcopenshell oracle exactly.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

…ped instances)

cross_format_parity wrote the STEP leg via a.to_stp(writer="occ"), but the OCC writer
collapses a multi-instance IfcMappedItem to one solid (a rigid STEP placement can't carry
the non-uniform scale) — a FALSE-POSITIVE parity failure, since the prod ifc/step→step
converter uses the non-OCC native path and emits every instance.

Route the parity STEP write through the stream (AP242) writer, which now preserves those
instances analytically, falling back to OCC per-file only when it skips a solid it can't
author (swept/revolved/tapered) — so swept/revolved cases still pass. Verified:
mapped-shape-with-multiple-items now step=4 (was 1); the swept/revolved/SAT parity
regressions still green (10/10).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

serialize.py emits ExtrudedAreaSolid/RevolvedAreaSolid/BooleanResult/Sphere as tags
50-53 and adacpp's C++ decoder reads them, but the Python deserializer raised on those
tags — so the lazy ShapeStore's pure-Python round-trip (and any adacpp-less hydrate)
failed on every analytic solid (NgeomDecodeError: unsupported tag 50).

Add the inverse decoders: rebuild the swept-area ProfileDef from the planar FACE the
encoder flattened it into (outer + inner loops in local XY; Circle-backed edges restored
as ArcLines so fillets survive), invert the revolve's world→local axis transform +
radians→degrees, and recurse boolean operands. serialize→deserialize→serialize is now
byte-identical for tags 50/51/52/53 (verified: IPE200 extrusion w/ fillets, revolve,
box−sphere CSG, sphere).

Tag 54 (FixedReferenceSweptAreaSolid) stays lossy — it bakes the directrix into
per-station frames with no invertible form — so it raises a clear "hydrate via adacpp"
error instead of returning a wrong solid.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

…ve mode

Curve-only IFC/STEP bodies (alignment axes, trimmed/segmented curves) tessellate to
GL_LINES in adacpp, but the adapy backend dropped the primitive mode — the line-index
buffer was then emitted as TRIANGLES (garbage) in the viewer.

- BatchMesh gains mesh_type (glTF primitive mode; 4=TRIANGLES default, 1=LINES); both
  tessellate_batch and tessellate_stream_buffer read it off the adacpp Mesh (getattr
  guard keeps older builds on TRIANGLES).
- _mesh_store_from_batch stamps MeshStore.type from the batch mode instead of hardcoding
  TRIANGLES, so curve bodies reach the GLB as mode-1 line geometry.

Verified via the prod IfcNgeomStream + tessellate_stream_buffer path: segmented-reference-
curve = 4/4 LINES; reinforcing-assembly = 34 TRIANGLES + 1 LINES.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

… menu bar

A new "Mesh" toggle in the top menu bar opens a panel that scans every geom in the scene for
"crows-nest" tessellation spikes (the same detector as the gallery "distorted" walk) and lists the
offenders in a table sorted by distortion, worst first:
- y-overflow scrolling table with sticky, click-to-sort headers (Spike / Spike-tris / Tris / Geom);
  clicking a row selects + frames that geom with triangle edges on (the gallery distorted-walk
  behaviour, on demand), with an optional Isolate toggle and a Clear button.
- editable spike thresholds (thin-triangle aspect, outlier-vertex K) with a Rescan button that
  re-runs the scan at the new thresholds, plus Reset to the gallery defaults. Thresholds persist.

Reuse-not-reinvent: computeRangeStats (meshStats.ts) and collectGeomEntries/sceneOrderEntries
(galleryWalk.ts) gained an optional SpikeThresholds param defaulting to the existing module
constants, so the gallery is unchanged; the panel passes the adjusted thresholds through. New global
meshPanelStore mirrors galleryStore's persisted pattern. tsc clean; vite build green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

…e, not a top-bar button

Per feedback: the distortion scan belongs alongside Info/Utilities/Section/FEM in the Scene panel's
mode dropdown, not as its own top-level menu button. Moved the scan UI into
info_box_scene/MeshDistortionSection (bare section — SceneInfoBox supplies the chrome + the dropdown),
added a "Mesh" option to the SceneInfoMode enum + the SceneInfoBox <select> and render branch, and
removed the standalone Menu.tsx button, MeshPanel.tsx, MeshIcon.tsx, and meshPanelStore's
visible/toggle (visibility is now sceneInfoStore mode === "mesh"). Thresholds + rescan + sortable
distortion table unchanged. tsc clean, vite build green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

…ortion section

To judge tessellation/welding quality, the Mesh section now surfaces two edge controls (reusing the
existing optionsStore edge overlay): "Mesh edges" (live on/off of the geometry-edge overlay) and
"Triangles" (shows the full triangulation grid, not just feature edges — baked at load, so it carries
the same "(reload)" note as the options drawer). Lets you see the actual triangles when comparing the
welded vs unwelded / native vs Python alternatives. tsc clean, vite build green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

…Mesh section

Per feedback: the Mesh distortion section now uses CollapsibleSection for both blocks — "Options"
(edge/triangle toggles + thresholds + Rescan/Reset/Isolate/Clear) defaults open, and the results
table "Distorted geoms (N)" defaults collapsed with the count in its header (the scan still runs on
open, so the count shows without expanding). tsc clean, vite build green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

…age reload

showEdges + hideTessellationEdges were both baked at model load (prepareLoadedModel builds the edge
overlay once, reading hideTessellationEdges then; nothing subscribed at runtime) — so toggling them
did nothing until a full page/model reload. New refreshEdgeOverlays() rebuilds every eligible design
mesh's edge overlay in place from the current options: CustomBatchedMesh.invalidateEdgeOverlay()
drops the cached geometry/material, and (when edges are on) a fresh overlay is re-added on the same
layer/parent. An edgesEligible flag skips FEA streaming meshes (which never take an overlay).

Wired into the Scene→Mesh section's "Mesh edges" + "Triangles" toggles and the options drawer's
"Geometry Edges" + "Hide tessellation lines" (dropped its "(reload required)" note). So you can now
flip on the full triangulation grid and see it immediately. (A live rebuild resets per-range edge
highlight/hide state — re-click to restore.) tsc clean, vite build green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

…fc (full round-trip)

from_ifc(reader="native") and Assembly.to_ifc(writer="native") now drive adacpp end-to-end, no
ifcopenshell/OCC — a fully native IFC round-trip that keeps geometry analytic (never tessellated).

- read: cadit/ifc/read/native_reader.py — native_read_ifc_into() iterates adacpp.cad.IfcNgeomStream,
  builds a geometry-shapes Part/ShapeProxy tree (lazy ShapeStore blobs; colour + spatial hierarchy
  from the C++ IfcResolver; prefers the IFC GlobalId as the shape id). Mirrors the STEP native reader;
  geometry-shapes mode (no typed Beam/Plate — ifcopenshell stays the typed-object path).
- write: cadit/ifc/write/native_ifc_writer.py — native_write_ifc() feeds each ShapeProxy's NGEOM blob
  + record (colour/transforms/instance_paths) to adacpp.cad.blobs_to_ifc, which emits the analytic
  IFC solids + IfcStyledItem + spatial tree.
- factories.from_ifc + Assembly.read_ifc gain reader: Literal["ifcopenshell","native"]; Assembly.to_ifc
  gains writer: Literal["ifcopenshell","native"] (native needs an on-disk dest + lazy ShapeProxy shapes).

Verified via the public API: from_ifc(native)->to_ifc(native) round-trips reinforcing (34
IfcSweptDiskSolid + 1 extrusion), box (2 extrusions), half_space_beam (3 extrusions + 2
IfcBooleanResult) — all IfcStyledItem coloured, ifcopenshell 0 validate errors. Default path unchanged;
native-ifc-emit suite green (43).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

…+ zero-copy, matching STEP)

The native IFC reader created ShapeStore() with the default (no compression); now it passes
compress=Config().cad_shape_store_compress like the STEP native reader (part.py:720). Zero-copy is
already shared: IfcNgeomStream (like StepNgeomStream) yields each blob as a capsule-owned ndarray VIEW
via ngeom_buffer_to_ndarray (no memcpy), and ShapeStore.add_blob retains that view as-is when
uncompressed. So the IFC native path now matches STEP: zero-copy retained blobs by default, zlib-
compressed in place when the flag is on.

Verified: from_ifc(reader="native") with cad_shape_store_compress=True -> store.compress + records
compressed, and to_ifc(writer="native") still round-trips (34 IfcSweptDiskSolid, 0 validate errors) —
the writer decompresses transparently via ShapeProxy.ngeom_blob().

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

…k to from_ifc

Wires the pure-C++ IFC->GLB (adacpp stream_ifc_to_glb: IfcResolver -> libtess2 welded + smooth
normals -> merge-by-colour GLB, no ifcopenshell/OCC) as the registered .ifc->glb converter handler,
overriding the generic from_ifc -> to_gltf path. New cadit/ifc/native_ifc_to_glb.py mirrors
native_step_to_glb (env-driven deflection/angular, meshopt inline). _via_ifc_stream_to_glb degrades
gracefully to _via_ada(from_ifc) when the native verb is absent, the run raises, or it yields 0
products (e.g. an IFC of only tessellated face-sets the analytic resolver skips) — always safe to
register. The native GLB is viewer-equivalent: geometry + per-mesh colour + spatial id_hierarchy +
names (IFC Psets never live in the GLB; fetched on selection).

Verified: reinforcing-assembly -> native handler (_h_ifc2glb), 35 products, 155K welded tris, 40
id_hierarchy nodes, meshopt, 1.1 MB; degenerate texture-only file falls back cleanly.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>