Docs: silhouette + material-drift follow-ups closed (session log)

Both follow-ups done: Silhouette_Armour (bone-weight broadening, T-pose-safe) + PlayerRigTools drift fix
(reproducible rebuild). Notes the replace_method [MenuItem]-strip gotcha.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Docs/Vault/07_Sessions/2026/2026-07-24_Bathynaut_Helmet_Synty_Ingame_Bodyswap.md

@@ -60,3 +60,20 @@ whole-`oldText` match over blind line ranges.
   reverts them. Bake the correct per-SMR + Mark-V multi-material assignment into the tool when convenient
   (deferred after the truncation scare — didn't want more C# surgery same session).
 - The grafted helmet SMR is named `SM_Suit_Helmet_MarkV_EXP` (the export dup name) — cosmetic.
+
+## Follow-ups CLOSED (same session, operator: "do the broadening and fix the material drift")
+- **Silhouette broadening — DONE.** `Silhouette_Armour.asset` built idempotently from the stock Synty
+  armour: shoulder pads inflated about the `Shoulder_L/R` joints (smooth 0.10→0.17 falloff, arms
+  untouched) + boots beefed ×1.16 about each foot centreline (Y falloff). **The bind pose is a T-pose**
+  (arms out to X~0.93 at Y 1.2–1.6), so broadening is by **bone weight / joint anchor, NOT raw `|X|`** — a
+  naive X threshold would grab the outstretched arms. 240 shoulder + 1128 boot verts moved; live-verified
+  (chunky boots + broader pauldrons, no seams).
+- **Material drift — FIXED.** Baked the correct assignments into the tools so a re-run reproduces the full
+  diver: `BuildBathynautPlayer` does the brass/undersuit split + swaps the armour to `Silhouette_Armour`;
+  `AttachBathynautKit` assigns gunmetal tanks / warm beacon / Mark-V brass-gunmetal-glass (post-graft
+  3-submesh override, so `GraftSmr` stays untouched). Re-ran the full Build→Attach→Weapon chain: clean,
+  reproduced the exact correct prefab, live-verified. Commit `977b5c1f8`.
+- **★ tool gotcha:** `script_apply_edits replace_method` **strips the method's leading `[MenuItem]`
+  attribute** (the swallow-adjacent-line hazard) → the menu item silently vanishes. Re-add it with an
+  `anchor_replace` on the signature and verify the attribute count. Whole-method replace is still the
+  safest for body changes — just re-check attributes after.