Evolve IX-StellaratorForge to v0.5.0 with SFR-2 dynamic compression study

[BryceWDesign]

Summary

Evolves IX-StellaratorForge to v0.5.0 while preserving the existing SFR-1 Rev A reference architecture and v0.4 evidence.

This release adds SFR-2 Rev A as a separately gated assumption-breaker architecture for investigating staggered high-field stellarator geometry, enhanced rotational transform, and phase-controlled dynamic compression.

Added

• SFR-2 Rev A machine-readable reactor configuration
• SFR-2 schema and technical-basis provenance
• reproducible SFR-2 screening implementation
• committed SFR-2 screening results
• promotion-gate documentation
• dedicated SFR-2 tests
• release/gate integration
• repository-wide LF normalization protection

Validation

Local validation of commit:

6d1bc9ac779742b6aac37788d0d2f49fad2c7e4e

• python check_stellarforge.py — IX-STELLARATORFORGE: GREEN
• python -m pytest -q — 80 passed
• git diff --check — clean
• release manifest — PASS
• inherited IX-Fusion/vNext gate — PASS
• SFR-1 v0.4 evidence preservation — PASS
• SFR-2 reproducible no-overclaim screen — PASS

Scientific boundary

SFR-2 remains an exploratory computational candidate.

The primary H_ISS04=1 screening cases do not cross the optimistic ignition proxy, and the implementation assigns no unmodeled performance credit to phase-controlled RF effects or magnetic flux compression.

This release does not demonstrate finite-beta dynamic MHD stability, kinetic confinement, qualified high-field magnets, full-3D tritium breeding, ignition, net-electric fusion, safety qualification, or hardware operation.