Publish settled-layout iris benchmark

README.md

@@ -18,7 +18,25 @@ to the benchmark card.
 
 The rest of this file is the runbook that was delivered with the APKs.
 
-**2026-09-09 (latest): pinned growth moves the retained transcript once.**
+**2026-09-09 (latest): growing layout settles in the frame that changed it.**
+`iris-bench-arm64.apk` rebuilt from ai-app-2 `5ece49b`. This fixes the two
+regressions found in the retained-transcript build: a newly streamed markdown
+block no longer spends its first frame beside/overlapping the previous block,
+and the multiline composer grows to its final viewport before it is masked, so
+the first visible line and its padding are not clipped.
+
+The fix is entirely in iris. A changed child's size was already measured up
+through its ancestors; iris now lays that changed branch back down through the
+final boxes in the same frame, and `Sized` no longer accepts a provisional box
+for its descendants as final. The dedicated LazySpan regression and the real
+phone-sized composer regression both fail without their respective fixes.
+
+The retained move remains intact: the 401-event upload rig reports instance
+uploads at **1.1% against a 1.1% floor** (p50 **1,488 bytes**) and an exact
+11,569-slot arena for 11,569 live primitives. Streamed-frame CPU is p50 0.12ms,
+p99 0.43ms, with no frame over 8.3ms in the layer-1 release profile.
+
+**2026-09-09: pinned growth moves the retained transcript once.**
 `iris-bench-arm64.apk` rebuilt from ai-app-2 `fffed42`. This is the
 framework-level `LazySpan` change: when a streaming message grows and pushes
 the transcript upward, retained rows keep stable local boxes and one shared