Precomp Anchor Repo is a script from James Hoff for After Effects that aligns anchor points and positions to a layer, composition, or parent area. It detects areas of precomps, masks, track mattes, expressions, and more.
Content areas can be calculated with two methods: Corner mode uses a layer's corners, while Vertex mode uses its vertices. It works across layer types including solids, shapes, text, nulls, footage, and adjustment layers, and handles parametric shapes such as ellipses, rectangles, polygons, and stars, with some roundness and inner-radius parameters unsupported. Track mattes and the Set Matte effect are calculated from track matte vertices and edges rather than the alpha channel. 3D layers are skipped by default but can be force-allowed in Settings.
Shape layer contents including stroke width, merge paths, trim paths, and skew transforms are supported, along with masks read as Bezier curves in vertex mode. Shortcuts cover Use Parent, Slide, and Ignore Precomp. Precomp Anchor Repo is listed here as free, and a trial version is available on the developer's page. It supports After Effects from CC 2015 through 2026.