75 lines
2.5 KiB
Markdown
75 lines
2.5 KiB
Markdown
# The Steward — Simulation Definitions
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## Purpose
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Stable IDs and immutable definitions now form the vocabulary shared by
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simulation state, systems, world adapters, scenes, tests, and future save
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migrations.
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`SimulationIds` is the canonical source for code-facing `StringName` IDs.
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`ActionDefinition` and `ProfessionDefinition` are editor-readable custom
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resources. `SimulationDefinitions` loads, resolves, and validates the complete
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prototype set.
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## Current action contract
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Each executable action definition contains:
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- stable `action_id`;
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- display name;
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- default duration;
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- optional preferred profession ID;
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- target type: resource, activity, or free movement;
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- resource action ID when the action targets a ResourceNode.
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The current actions are gather food, gather wood, patrol, study, eat, rest, and
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wander. Idle and dead are stable state sentinels, not executable action
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definitions.
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SimNPC reads default duration and preferred-profession metadata from these
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definitions. WorldViewManager reads target type and resource-action metadata
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instead of maintaining a separate gather-action map.
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## Current profession contract
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Each profession definition contains a stable `profession_id` and display name.
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The current professions are farmer, woodcutter, guard, scholar, and wanderer.
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NPC generation chooses from the registry's stable IDs. NPC state stores and
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restores those IDs as `StringName`, and rejects records that reference an
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unknown profession or executable action.
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## Validation
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The registry rejects:
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- missing or duplicate IDs;
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- empty display names;
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- non-positive action durations;
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- invalid target types;
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- resource actions without a resource-action ID;
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- references to unknown professions or resource actions;
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- definition resources that fail to load.
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`tests/simulation_definitions_test.gd` verifies registry integrity,
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definition-backed behavior, unknown-ID rejection, and serialization
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round-tripping.
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## Deliberate boundary
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Definitions currently own identity and the static metadata already proven by
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the prototype. They do not yet own:
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- utility thresholds and consideration curves;
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- preconditions or costs;
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- completion effects;
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- interruption and failure policy;
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- reservation strategy;
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- detailed target-selection policy beyond current resource/activity/free
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metadata;
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- presentation hints beyond target type.
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Selection, execution, target resolution, and visual travel are now separate
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responsibilities. The remaining concerns should move into definitions only
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when the action-system implementations prove a stable, reusable contract.
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