sequential-quantum-gate-decomposer

Guides spec-driven development under docs/density_matrix_project only: phase planning, DETAILED_PLANNING, ADRs, task mini-specs, pre-implementation checklists, API reference and publication docs. Applied when work touches that tree or when the user mentions spec-driven development, phase contracts, task-level specs, or the density matrix planning workflow.

Runs the SQUANDER density matrix test workflow end-to-end. Use when the user asks to test, verify, validate, or benchmark density matrix functionality, including pytest, examples, optional C++ tests, and Qiskit comparison.

Cleans the SQUANDER repository of build artifacts and rebuilds from scratch. Use when switching branches, after CMakeLists.txt or C++ header changes, when the build state is broken, or before full validation runs.