encryption_sm/.sisyphus/notepads/gmsp-impl/learnings.md

## F4 Code Quality Review (2026-06-15)

• All 10 header guards use #ifndef NAMEH convention — matches project AGENTS.md
• All 44 declared functions have implementations — 100% coverage
• Zero stdint types in embedded code; Linux test uses stdint correctly
• Zero dead loops (while(1);) in non-main paths
• Zero hardcoded paths in embedded code
• 1 TODO: gmsp_dispatch.c:598 — chip SN placeholder (0xFFu fill), legitimate stub
• No FIXME/HACK/XXX found