Entry 86

Event host defaults report themselves: what story 4 and story 11 leave unported

2026-09-24scripttest

Filescrates/piney-event/src/host.rsdocs/engine/event-vm.md

The event VM was checked against the game (82 and earlier). The user then played story:4 ("Orca gives me items and it didn't work right, no trapped chest, nothing") and story:11 (BlackRose never joins). Neither fault was in the interpreter. Each was an instruction whose Host method the mode's host never implemented.

Why it was silent

• The defaults. Host has 79 methods. All but save have a default that does nothing or returns a neutral value. A host overrides only what its mode needs.
• What that hid. An instruction whose method a host had not ported ran its default without a trace. The scene carried on as if the step had happened.

What changed

• Defaults report. Every default now calls host::unported(name), which prints the method's name once to stderr: "event host: stream is not ported by this host (the default ran)". host::take_unported() returns the names since the last call, so a playthrough test can assert its host left nothing to the defaults.
• The one exception. volume answers 1, which is Infection's volume and so correct for the port. It stays quiet.

What the story starts leave unported

Each start ran for 6,000 frames with X pressed every 25 frames. That reaches only the branches a talk-through takes. In every mode, clear_gate_hack (ccClearGtHack, from ccStartThEvent) and game_over (the event task's check in status 5) ran.

• story:4. It reached the desktop at frame 4,623. Without WORLD_MAN::SetEventData every room's block fires in room 0 (82), so the event's camera marks were placed for rooms Kite was not in. That is the likely cause of the camera in the walls the user saw.
• story:11. BlackRose's stream 7 never plays in the town. The script gives her member address, then branches on in_party 15. The player's invite from Member Address is the join, and nothing past the missing stream leads to it.

Who has what

• Event 4 end to end. The combat agent has SetEventData, the doors and area_host stream / remove_trap ready to merge. It still owes:
  • add_spc_item, item_get_menu(_end), remove_trap_done, room, prev_room, gimmick and boss;
  • the treasure and trapped boxes;
  • the event cameras in the dungeon's rooms;
  • a story:4 playthrough that asserts take_unported() is empty.
• Event 11's town side. A new agent has:
  • the town's stream, clear_gate_hack and game_over;
  • the Member Address invite and BlackRose's warp-in;
  • the party through the Chaos Gate and area_host's party_add / party_remove;
  • a story:11 playthrough.

Checked

The piney-event tests and the story-start tests pass: event_2_plays, event_3_plays and the story starts. This entry's change does not alter behaviour, only reports it.