Why: every reference a user makes to a face or edge (fillet and chamfer
edges, sketches on faces, shell/draft/offset faces, joints, appearances)
is stored as a name and found again after any upstream edit. Those names
were re-derived by sampling points of each face and voting, and pieces
of a split face were numbered by where their centres lay. After an
upstream edit that splits, merges, mirrors or shrinks a face, a fillet
or sketch could silently re-attach to the wrong face, and nothing told
the user. The kernel now reports exact history for its operations, so
names follow it and fail loudly instead of guessing.
- crates/doc/src/lineage.rs: a feature's kernel histories composed into
one lineage over nameable operands (bodies before the feature, moved
copies, shell cavities, tools named by role: sketch curve, cap, box
side, imported face). Instrumented: extrude/revolve/sweep/loft tools,
join/cut/intersect, lumps after a cut, fillet/chamfer, shell, draft,
split face/body, pattern/mirror (bodies and features), combine,
boundary fill, move/scale, offset/delete face, thread, import.
- crates/doc/src/history_names.rs: names from lineage; split pieces told
apart by the faces only they touch (F2:top#[F2:side:l4,F4:side:l4]),
merged faces answer to every name (aliases), lump bodies ordered by
their faces' names instead of shell order.
- crates/doc/src/name_lookup.rs, piece_names.rs: references resolve by
exact name, alias or bounding faces, else nearest piece with a
warning; names worked out from geometry (operations without history)
are reported when only geometry decided.
- Format 14: names stored by older formats get a legacy mark and are
found as the build that saved them found them (some geometric names
name a face history names differently: a tube's outer wall was named
after its inner circle). New corpus file saved by 9a979cf.
- kernel: Body::lumps carries each piece's history over the whole.
- Adversarial tests: split, merge, mirrored twins, shrink to a sliver,
moving cut with body pieces, history-less bodies, certified sketch.
- docs/book/src/dev/naming.md describes the real mechanism and why.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01J53sR6gEaVt56soFDpTck8
