SMLib: the prebuilt with a torus or sphere keeping its NURBS form, and the concave mixed fillet corner

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DtL5Lzv2n8fyKqD61NCHSF

crates/smlib/SMLIB_PREBUILT

@@ -1,10 +1,10 @@
 # Rust target, SHA-256 of smlib-<target>.tar.gz in the release prebuilt-<SMLIB_REV> of
 # tangency-labs/smlib. Written by scripts/fetch-smlib.sh --pin; never edited by hand.
-aarch64-apple-darwin f55d28439cb9827163a89f2b419d103f9f2bbfe4b1c8eb81400e296f6ce62eea
-aarch64-pc-windows-msvc 453c8426e13bf920cb7bf7a06abb9c410b0d712fd560cb6039a2f8fa0546d448
-aarch64-unknown-linux-gnu 7d7f909eadc1be59a2a85230b48ec626425e055c2e103f6d6ed0cddf438496e6
-i686-pc-windows-msvc 5bfca62127b4bbcbfded9486194cf6cdc0657a0a6e35ef56785e71722801e256
-wasm32-unknown-unknown 2f2ee2064159bdef067095f67012fe1946a40fd9a73606937b546b4d319c73c0
-x86_64-apple-darwin f48b2c245e63eb72ec204ea93e3e8339e055f51d4ea4d5a36a7071030549571d
-x86_64-pc-windows-msvc e0d8e7f4910ff1025dcb03a209fd4903423d99daefd86aa4bd25da4b4092318a
-x86_64-unknown-linux-gnu a6e32afc63f749524ff72a18c6cc2027da6edaa4b330db6a22e6afd6fd9cb3fd
+aarch64-apple-darwin d50fa7182e66d823b24fdaf957c5ab9da936aa5e4dd3c1e76beb16ae7202cd86
+aarch64-pc-windows-msvc 37974432da4fc8abbd2d9605e868ca6938044d6dd7bc3ee725312fd28fc0ef4c
+aarch64-unknown-linux-gnu 1d03a80a6915bf5908572ac187cc97defe221bacacdb9fa2ddded7215e400909
+i686-pc-windows-msvc 3b492c0a850c930686a6dcdf81a3de689f04862ef1e9f9eceac5528694c0362f
+wasm32-unknown-unknown 6cc238d9c18ac15235cda931f3dfcc3e20c8782e5c7aa29e5d11d52050c431c0
+x86_64-apple-darwin 5f392c1f344e0649d3b0d57d9af1737a3a73ee7346aae3dc56494b50b4af52ae
+x86_64-pc-windows-msvc 785c0c68ec278501827dfcde88373dd05c5a31af3935040ad29883afe3fb10f6
+x86_64-unknown-linux-gnu 004f9e38f7af75a9a66844f11fa83c820b053b2e5bdd5249cb416e2f6a625319

crates/smlib/SMLIB_REV

@@ -1 +1 @@
-e51c3f2a3633c0173fcb220b6d1c4b4d4f81330f
+12559936092c54c1411c4bbb5c6c26fd93308c43