The exact B6-c2 set (rob b6 spec §2): :8402 (callee fn-type resolve cu),
:8435 (variadic slice param vsu), :8561/:8563 + :8577/:8579 (tagged
widen-detect pu/au pairs, arg-class + #38b MEMORY-class) + the two
LOUD-PRESERVING chases :8829 (float-struct rule-7 fatal st) and :8934
(#32 tuple-arg rule-7 fatal targ). Raw `->under` in cgen.c 49→41.
LOUD-PRESERVING discipline: the :8829/:8934 chases widen what the gate
SEES, never what it ACCEPTS. DESIGNED ACCEPTANCE NARROWING (ken b6
oracle c2): kb6_fsarg2 — a 1-level-alias float-struct from a non-ident
source previously DODGED the #271/#165 fatal via the single peel; cs
accepted and GP-passed it runtime-correct by self-consistent luck
(caller+callee agreed on the wrong transport, no SSE eightbyte). Post-
c2 cs louds with the pinned #271/#165 text. ww's cell was already loud
at its own alias-return bound (#272/#276/#277 class) — fsarg2_bound
pins BOTH texts per-stage (experr_ww). fsarg0 plain control stays loud
both stages. :8934 is WATCH-ONLY (alias tuple-args are checker-blocked
upstream, #86/#99): kb5_tuparg_c two-key cells verified unmoved
(cs ok/0 + ww ok/1).
TRAIN INVARIANT: cs-only; w6c_ww/ww_ww bit-identical to the 4cac1cb
baselines (b6bddc8e…/4e9ca874…). cs movers bounded to exactly
kb6_fsarg2 (run-cell ok/0→ERR, no asm emitted — zero run-row movers);
rest of the corpus + five mains byte-NEUTRAL; kw1_101/fill2/tuparg_c/
xampdef/amplen1 detectors unmoved; 989 ratchet zero flips. kb6_sarg /
kb6_strarg / kb6_fsarg (ident twin) latent byte-NEUTRAL per ken's
structural bound.
944_alias_cgen_b6_run grows 3→8 rows, 9→22 checks: fsarg0_loud_ctl +
fsarg2_bound (per-stage experr pins; row struct gains experr_ww for
two-site loud pairs) + fsarg_ident_ctl/sarg_2lvl/strarg_2lvl controls.
All 944-family suites green; sizelint 0.
Hojun-Cho
9659a0dfbe