[dayfine]

Depends on #128 (base bdsp/autostory-v4); the diff shows only this PR's change.

A grid simulation of the player so walking and scene bugs in BDSP AutoStory show up in unit tests, not only on the Switch.

• GridSim moves like the console measured: 40–80 ms D-pad taps only turn, 160 ms steps a tile, holds walk to the wall, a 100 ms stick tap moves about 0.6 tile and later D-pad moves keep that offset, doors warp only from their exact column, people block, and trainers' sight lines and coord events stop the walk. The route walker runs on it through GridSimRouteIO.
• The executor's walking steps (ROUTE, LEGS, STEP, TALK, MASH) move into StoryWalkSteps on a StoryStepIO, so the whole table, 00.00 to 01.11, runs with the program's own steps on the sim, in one run and row by row. Events, battles and shops are stubbed and end where the table says; each row must start where the one before left the player.
• Scenes start from the maps' coord_events, now BDSP AutoStory maps: the story maps as generated JSON, read through MapData #134's generator output (decomp triggers plus Mom's call), read by story_coord_events(); nothing is hand-added to the JSON here.
• Detector-miss test (AutoStory simulation: inject timing and placement variance #162): for each door fade and map banner the run looks for (20 fades, 8 banners), reruns its row and the next with it missed; every miss must stop the run in its own step or be got over, never fail later.
• Exit tests for r75 and r81: a hold that misses the fade goes on past the door, and a banner reads a few tiles into its map. The old walk west out of the Oreburgh Gate ends in Route 203's pond pocket and the old timed walk out of the Ravaged Path on Route 204's cliff, both caught by the end-tile check; the table's tap-to-banner never ends there.

Testing

• Suites: GridSim and StorySim pass locally, as do the existing AutoStory suites. Reverting earlier fixes fails the new tests: turning with a 100 ms stick tap (r49) misses the Sandgem Center and Jubilife School doors and most of the table's routes, and a talk that does not first turn to the pose's facing (r40) finds nobody beside Mom or the TV station clown.
• Console: not run; the sim's moves are the ones measured on console B.

🤖 Generated with Claude Code

https://claude.ai/code/session_01AKYzhrMnPK61XHWEch4a6E