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Job: target_node claim so pawns don't cluster on the same target

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Visible bug: with 1 wall ghost queued, all 3 pawns picked the same site;
2 stood idle while 1 built. Same shape would affect chop/mine/haul/etc.

Design: Job carries an untyped target_node ref (the tree/rock/build-site/
crop/item/patient/workbench/etc the job is acting on). Job.is_target_taken_
by_other(target, excluding_pawn) does an O(pawns) scan of live job state to
ask 'is anyone else already working this?'. Each WorkProvider's find_best_
for() now skips claimed targets in its scan and sets j.target_node before
returning. No per-entity claim state, no .claim()/.release() bookkeeping,
no save-format change — target_node is intentionally not serialized
because pawns re-decide and re-bind naturally after load.

Providers updated: construction / chop / mine / plant (harvest path) /
hauling (item AND corpse) / cleaning (target is Vector2i tile not Node;
field is untyped, doc'd) / doctor / crafting (workbench).

Not touched: rest (everyone shares the rest tile, that's fine), eat /
sleep (food and beds have their own availability gates; flagged as a
followup if multi-pawn food contention surfaces).

Verified MCP runtime: fresh boot, 3 pawns picked 3 distinct wall sites
(44,28)/(45,28)/(44,27) with distinct target_node refs.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
megaproxy 2026-05-12 13:45:44 +01:00
parent 07fb66608a
commit e7a2407af2
9 changed files with 70 additions and 1 deletions
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9
scenes/ai/hauling_provider.gd
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@ -62,6 +62,9 @@ func find_best_for(pawn) -> Job:
# Skip items another pawn is already carrying.
if item.being_carried:
continue
# Skip items another pawn has already claimed (target_node = item node).
if Job.is_target_taken_by_other(item, pawn):
continue
# Find the best destination for this item type + priority.
var dest = _find_best_destination_for(item)
@ -105,6 +108,9 @@ func find_best_for(pawn) -> Job:
# Skip corpses another pawn is already carrying.
if corpse.get_meta("being_carried_corpse", false):
continue
# Skip corpses another pawn has already claimed.
if Job.is_target_taken_by_other(corpse, pawn):
continue
var dest = _find_best_destination_for(corpse)
if dest == null:
@ -126,6 +132,9 @@ func find_best_for(pawn) -> Job:
return null
var j := Job.new()
# target_node is the item/corpse being picked up — the carry-from side.
# Other pawns' HaulingProviders read this to avoid double-claiming the same item.
j.target_node = best_item
if best_is_corpse:
j.label = "Haul corpse '%s' -> (%d,%d)" % [
best_item.deceased_name,