Sprints
Each sprint is a GitHub project with one goal, its issues grouped and claimed in the open. Its README says what to read first and how to pick up work.

Blends Sprint
The new blend construction as solidcore's only blend path: flags retired, old fillet paths deleted, the open corner and End steps built, known-failing cases fixed or correctly refused.

Kernel Rig Sprint
solidcore's kernel rig: every corpus case replayed through solidcore-ops and graded, and main's kernel-rig gate green.

Local Operation Sprint
The local operation and the offset on certified decisions only: the soundness gate's checks certified, reach and extension acceptance exact, the vertex splits and tangent edges built by default.