The CGNAT smoke test's OPEN DECISION is made: fleet-wide, permanent,
family-agnostic client MTU 1280 (RFC 8200 IPv6-minimum floor), implemented in
felhom-agent v0.65.0.
- §4.3: OPEN DECISION → made decision + rationale + rejected alternatives
(auto-probe/per-type = fragility for a non-metric; MSS-clamp = unneeded).
"ships MTU 1420" → 1280; corrected "fixed-line unaffected" (DS-Lite ~1452,
PPPoE would also black-hole at 1420 — one floor covers all).
- §4.2: 1280 is family-agnostic so MTU correctness is decoupled from v4/v6
resolution; v4-pin noted as a separate optional determinism item.
- §3.2 wire-field note + §8 S6 row: MTU 1420 → 1280; S6 residual now only the
true-CGNAT-SIM retest.
- REPORT.md overwritten.
Docs-only; the constant change is in felhom-agent v0.65.0.
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Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PSK5g6qYLknKj8u3QAFEr6
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