Anchors were a list: SetPoint re-applied an unchanged anchor, GetPoint counted in the order points were set and answered five nils past the last, and the cursor tooltip replaced every anchor each frame.
In 1.12.1 a frame holds one anchor per point. SetPoint (`0x767c70`) returns at `0x767d5e` with no store and no layout queue when that point's anchor has the same target and relative point and both offsets differ by under 2⁻²² layout units (`[0x8029d4]`). GetPoint (`0x7a2340`) walks the nine slots in point order and pushes nothing past the last (`0x7a240d`). The `ANCHOR_CURSOR` update sets BOTTOM alone (`0x530b20`).
Anchors are now nine slots, and SetPoint, GetPoint and the cursor update follow those rules.
Tests: an unchanged re-set and an in-threshold offset touch no layout, GetPoint order and indexes, a cursor tooltip keeps an addon's second point.
Fixes#926Fixes#131Fixes#879🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
