0.2.6 G05 Qualification Contract

026-G05 covers modal, transient dynamic and harmonic response evidence. The registry targets are 14 modal, 16 dynamic and 12 harmonic cases. Executable status is deliberately separate from qualification status: READY means that the controlled runner can execute a case; it does not close G05.

Requirement	Target	Evidence required	Policy
G05-MOD-001	14	Frequencies, generalized residuals, mass orthogonality, normalization and expected rigid modes	Residual uses the existing <= 1e-7 contract; other limits are case-specific
G05-MOD-002	14	Compatible coarse/medium/fine modal refinement and mode tracking	OWNER_APPROVED_BOUNDED: final adjacent tracked-mode frequency change <= 1%, at least three compatible levels; residual and MAC remain recorded when available
G05-DYN-001	16	Newmark histories, residuals, stability and energy drift	Existing residual and benchmark energy policies are retained
G05-DYN-002	16	At least three time steps over a common physical interval	OWNER_APPROVED_BOUNDED: final adjacent history error <= 1%; identical physical interval and comparison times, with residual and energy criteria retained separately
G05-HAR-001	12	Complex amplitude/phase, residual and zero-frequency behavior	Existing harmonic residual and zero-frequency criteria are retained
G05-HAR-002	12	Frequency-grid refinement, peak/phase tracking and resonance handling	OWNER_APPROVED_BOUNDED: final amplitude change <= 1%; phase, peak displacement and complex residual remain recorded; exact singular resonance is excluded

The Owner approved these bounded policies on 2026-08-29. They do not promote a family by case count alone, relax the pre-existing residual/energy criteria, or close G05. Each application still requires compatible meshes or grids, a documented observable and controlled provenance.