Completed the full link-delivered LXMF unit:
Tier 1 audit: `link-lxmf-tier1-rns-1.2.4-lxmf-0.9.7.md`
Tier 2 vectors/verifier: link-lxmf.json, regen_link_lxmf.py, and verify_link_lxmf.py
Tier 3 promotion: updated SPEC.md, flows, status, and documentation
Key correction: the 319/320 boundary uses upstream’s computed LXMF content_size, not simply raw message content length.
Also corrected stale flow descriptions for KEEPALIVE (0xFA) and encrypted LINKCLOSE teardown (0xFC).
Verification:
Deterministic vector regeneration: identical SHA-256
Portable-path and formatting checks: pass
Full pinned suite: 17 passed, 0 failed