Collision outlines for autotiles: a frame holds several outlines (click adds a corner to the active one, Ctrl/Cmd-click starts a new one, clicking another outline makes it active, Delete removes the active outline and never the frame in collision mode), an autotile's outlines are drawn over the whole block, cut at the quarters and each cell takes the pieces of exactly the quarters its image is made of, so edges, outer corners and notches follow automatically; a tile of the block with nothing drawn blocks fully, cells of only full quarters merge back into rectangles, collision scale does not apply to an outlined autotile, and the previous format with one flat outline still loads (#141)

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

README.md

@@ -38,7 +38,7 @@ npm run build        # writes dist/ and regenerates index.html; the folder is wh
 The browser suite and the three example games need a machine with a GPU:
 
 ```bash
-node tools/seed-e2e.mjs && node tools/e2e.mjs      # the editor, 1067 checks (GM_STEPS=20 for one step)
+node tools/seed-e2e.mjs && node tools/e2e.mjs      # the editor, 1068 checks (GM_STEPS=20 for one step)
 node tools/seed-jumprun.mjs && node tools/smoke-jumprun.mjs
 node tools/seed-tetris.mjs && node tools/smoke-tetris.mjs
 node tools/seed-actor.mjs && node tools/smoke-actor.mjs