diff --git a/docs/port/HANDOFF.md b/docs/port/HANDOFF.md
index 54173498..760f6870 100644
--- a/docs/port/HANDOFF.md
+++ b/docs/port/HANDOFF.md
@@ -805,6 +805,36 @@ one level, parent alpha **0** throughout.
 **(200, 90)** against a 399×180 sprite — the pivot *is* the centre, so rotation
 displaces it by nothing.
 
+## ✅ 2026-08-29 — how much of `title`'s residual the rotation would actually buy
+
+Measured, because the rotation decision needs a size and not just a direction —
+[`title-residual-tone-vs-geometry.md`](../re/structures/title-residual-tone-vs-geometry.md).
+
+A **per-level LUT** fitted on a screen is the most general tone model possible,
+so whatever it cannot close is **by construction spatial**. Fitting it on the
+screen itself bounds the tone share from above:
+
+| | closed by a self-fitted tone LUT |
+|---|---|
+| **main menu** (positive control — your 0.06 %, so geometry is right) | **70.3 %** |
+| **title** | **32.0 %** |
+
+🔴 **So at most a third of the title's disagreement is tone, and at least two
+thirds is geometry** — content in the wrong place. The rotation is the dominant
+term by roughly two to one, and the fitted LUT is generous to tone, so the real
+geometry share is larger.
+
+⚠️ **And do NOT carry a global tone correction.** Fitting on the title and
+applying to the menu closes 29.7 %; fitting on the menu and applying to the title
+makes it **24 % worse**. A curve fitted on a dark flat screen is unconstrained at
+the bright end and actively harms elsewhere. This extends the single-exponent
+refutation: **even a full per-level LUT does not transfer between screens.**
+
+⚠️ Reach: my pairing is looser than yours — same screen, not the same instant —
+so the **ratio** is the claim, not the absolute level. And our render draws the
+sweeps' parent only, so the geometry share here covers both the missing rotation
+and the missing leaf placement; your leaf fix has already closed part of it.
+
 ## Status
 
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