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docs(research): resize 重绘时序证据与候选方向 (#194) - #197
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… refs #194 Fixes the observed arithmetic (repaint generated for the previous geometry, consumed at the new one, shifted by the height difference), lists three candidate directions with risks, and fixes the bounded experiment that must precede any implementation.
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| 2. **进度记录**：几何变化前 `grid=[111,7] top=75`，缩放到 75% 时 `grid=[149,10] top=75`，回到 100% 时 `grid=[111,7] top=78`，且 `selected` 由 true 变 false。 | ||
| 3. **输出轨迹**：一轮几何序列里出现约 10 次"回 home 重打尾部 6 行（075–080）"的重绘批次，并带 `ESC[7;1H` 与若干 `ESC[K CR LF`。 | ||
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| 把三者合起来：重绘批次按**旧几何**（10 行、首行 075）生成，被**新几何**（7 行、首行 078）消费，于是行 0–5 被写成 075–080，整体错位 **10 − 7 = 3 行**。 |
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The listed observations establish a content change and a three-row displacement, but do not establish that the repaint was generated for the ten-row geometry. In the reviewed code, experiments/shell/shell.cpp records output timestamps and dimensions at consumption, not generation or arrival. Moreover, experiments/shell/results/2026-10-29-resize-repaint-witness/README.md explicitly preserves two distinct interleavings producing the bad state and says the actual CI cut remains unknown. Presenting one ordering as an observed fact here can incorrectly constrain the proposed fix before the timing experiment below has resolved it. Label this explanation as a hypothesis and retain the unresolved generation/arrival/consumption ordering.
AGENTS.md reference: AGENTS.md:L13-L13
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为 #194 固化观测与候选方向，不改行为。
Refs #194 #38