circumplex

Work the next (or a named) task from MILESTONES.md through the full plan → test-first → implement → validate → review → log loop. Use when the user says "next task", "work on B3", "continue the milestone", or asks to pick up milestone work.

Prepare a CRAN release of the circumplex package — checks, versioning, NEWS, cran-comments, submission steps. Use when the user says to prepare a release, submit to CRAN, or cut a version.

Numerically validate circumplex estimation code against independent references and angular boundary cases. Use after any change to ssm_* statistical functions or src/*.cpp, or when the user asks to verify statistical correctness.