Rijad Zuzo
167 lines
9.1 KiB
Markdown
167 lines
9.1 KiB
Markdown
# The Steward — Economic Event Stream
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## Current contract
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Every successful food or wood movement creates an `EconomicEventRecord` using
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the applicable event type:
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```text
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resource_extracted
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storage_deposited
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storage_withdrawn
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item_consumed
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```
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Each record contains a monotonically increasing event ID, event type,
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simulation tick, actor ID, source ID, destination ID, item ID, and transferred
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amount, plus the authoritative world position captured when the fact is
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recorded. NPC events preserve their authoritative interaction target (or NPC
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position when no target applies); player extraction/depletion events preserve
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the ResourceNode interaction position. Actor `-1` identifies a player-triggered
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extraction until persistent player identity is introduced.
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Events are immutable facts about completed transfers. They do not perform the
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transaction and are not replayed to reconstruct current state. Resource,
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inventory, and storage records remain authoritative.
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`SimulationEventLog` owns ordered event identity, append/restore behavior, and
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history/rate queries, including exact lookup through `get_by_id()`.
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`VillageEconomy` performs transactions and requests event records only after
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state changes succeed; `SimulationManager` remains the public signal boundary
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used by presentation.
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An action whose definition-backed completion cost becomes unavailable records
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a zero-amount `task_blocked` narrative fact with stable action, source storage,
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resource, and required-amount fields plus the readable shortfall reason. This
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makes late contention queryable and inspectable without pretending that a
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transfer occurred.
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## Persistence and determinism
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`SimulationStateRecord` schema v9 stores the ordered event stream,
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`next_event_id`, directed relationships that may reference an exact event, and
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per-NPC known-event references with first-acquisition provenance, plus
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opportunity records that reference exact trigger/resolution events. Schema v1
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and v2 saves migrate to an empty stream beginning at ID zero; world schemas
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v1–v7 migrate to an empty opportunity list, while world schema v8 preserves and
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normalizes its pantry opportunity history. Parsing rejects duplicate event
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IDs, invalid or duplicate knowledge/opportunity references, impossible
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communicator sources, relationship causes the observer does not know, and next
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IDs that could collide with restored history.
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Positive food deposits, positive NPC food withdrawals from `village_pantry`
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into that actor's matching inventory, and definition-backed patrol/study
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`task_blocked` facts caused by missing wood at `village_woodpile` are currently
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knowable. The actor and living NPCs within the bounded witness radius receive a
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`KnownEventStateRecord` at record time. Witness distance uses the event's
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captured position, never the actor's later location. A successful food deposit
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can raise a hungry familiar witness's directed trust; the relationship stores
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that same deposit event ID rather than copied prose, so the inspector can
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resolve and display the real completed fact. This is evidence-gated use of the
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event stream, not general event sourcing.
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Knowledge now records whether an NPC performed, witnessed, heard, or inherited
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a fact from a legacy save. When an NPC arrives beside an already-working NPC at
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the same non-storage activity site, the worker may communicate one newest
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direct fact within 2.5 metres. The listener references the same immutable event
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and retains the speaker ID; no transaction or event is replayed. Only
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performed/witnessed facts can cross this one social hop, so this is not yet a
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rumour cascade. Relationship appraisal uses the listener's state when the fact
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is acquired, not a reconstruction of their needs when the old event occurred.
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Known facts are now bounded without deleting objective history. A fact is
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lasting while it remains that NPC's current trust cause; other facts are recent.
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An NPC keeps at most three recent facts, and a deterministic review once per
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simulated-day-sized interval removes recent facts at least one day old. Current
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causes remain so `Relationship` and `Because` never point at forgotten
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evidence. Conversations prefer lasting direct facts, then the most recently
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acquired direct fact. Communicated provenance snapshots how the speaker knew
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the event, so a listener's memory stays valid after the speaker forgets.
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`VillageOpportunitySystem` is another read-only consumer of immutable facts.
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A known positive NPC pantry withdrawal, combined with the pantry currently
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being empty and a living critically hungry knower, can open one
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`restock_empty_pantry` record. A known missing-wood `task_blocked` fact can open
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one `supply_missing_wood` record for its living performer. At most one need is
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open globally. The system does not perform a transaction, assign an NPC, or
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append a quest-only event. A need resolves only after its target storage
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actually reaches the one-unit target through either:
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- a later matching positive `storage_deposited` event from a real NPC
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inventory; or
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- a later player `resource_extracted` event from an existing player-usable
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matching ResourceNode directly into the target storage.
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The exact trigger and resolution IDs remain in opportunity history. The active
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trigger memory is protected until closure. A wood need is invalidated if its
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interested performer dies or if it is still unresolved one simulated day after
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opening; invalidation emits no event and stores the close tick and stable
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reason. Resolution or invalidation returns the trigger to normal bounded
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retention.
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For an open need, the same system can derive one capable helper without
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assigning work. A candidate must know the exact trigger and have a familiar
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directed relationship with at least 0.6 trust toward the interested villager.
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Enough carried inventory produces the matching deposit route; otherwise a
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matching enabled, NPC-usable, sufficiently stocked and available finite
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ResourceNode state produces the gather route. Ranking is deterministic and
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prefers ready inventory, trust, profession fit, familiarity, then stable NPC
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ID. The returned opportunity/trigger/helper/action/resource, inventory source
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or available finite-source count, and reason are an ephemeral query result. It
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does not select an exact gather target; that remains with `ActiveWorldAdapter`
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and `ActionTargetResolver`. No event, reservation, RNG draw, task mutation, or
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serialized assignment is created.
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At an idle NPC decision boundary, `SimulationManager` performs that query again
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and gives the ephemeral result to `ActionSelectionSystem`. Personal survival,
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low-energy rest, mourning, and sleep/meal schedule branches retain precedence;
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otherwise only the named helper selects the reported ordinary gather/deposit
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action. From there, existing target resolution chooses and reserves an exact
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finite resource or storage target. The current NPC task may serialize normally
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while in progress, but no opportunity-to-helper assignment or acceptance state
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exists in the save.
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The food-loop regression verifies this chain:
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```text
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bush -> NPC inventory -> village pantry -> NPC inventory -> consumed
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```
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It checks event order, stable IDs, exact quantities, conservation, and
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save/restore continuity.
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## Presentation
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`npc_inventory_changed` is a transient presentation signal. The active
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`NpcVisual` shows a small food sack whenever its authoritative inventory
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contains food. A newly loaded visual derives the same state directly from the
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NPC record, so unloading presentation does not lose the fact.
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The selected-NPC inspector shows up to four lasting-first retained facts with
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acquisition provenance, separately from three objective events the NPC
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personally performed. A real trust-changing consequence emits one transient
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amber blossom above its observer. The cue is presentation-only, remains visible
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in cinematic mode, and is neither saved nor replayed after visual rebuild.
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The village summary also shows one compact active need with its real target
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progress and interested villager; only that villager's inspector retains its
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open/closed detail and names the exact supplier for a resolution. The empty-bowl
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world cue remains specific to the pantry shortage rather than representing a
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wood need as hunger. The active summary additionally names the currently
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derived helper, supply action, trust fact, and inventory or finite-source route,
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or states that no informed trusted villager is currently able to supply it.
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## Deliberate limits
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The objective stream is currently kept in full for the small simulation
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garden; only per-NPC known references are bounded. Before large populations or
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long-running worlds, add measured archival/summary rules and query indexes.
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Proximity is the only current direct witness rule, and communication is
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intentionally one-hop and tied to shared activity arrival. Line of sight,
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hearing, personalized reinforcement/decay, multi-hop rumours, secrecy, false
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beliefs, and multi-event causal graphs belong in later event/history slices.
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They should extend this record family without making prose authoritative or
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recomputing old evidence from current positions.
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The current opportunity family is likewise a bounded two-type projection with
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one read-only helper query and one ordinary action-selection consumer, not a
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generic quest, reward, acceptance, dialogue, helper assignment, or capable-
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helper framework.
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