Initial Commit

openspec/changes/enterprise-gaming-universe/specs/gaming-universe/spec.md

@@ -0,0 +1,86 @@
+## ADDED Requirements
+
+### Requirement: GamingUniverse construction
+
+The system SHALL export `GamingUniverse` accepting `startTime`, `timeScale`, `UniverseClient`, and optional `clock`.
+
+#### Scenario: Construction
+
+- **WHEN** `new GamingUniverse({ startTime, timeScale: 3600, universe })` is called
+- **THEN** the instance is created with `getGameTime()` returning `startTime`
+
+### Requirement: Time scale control
+
+The system SHALL provide `setTimeScale`, `pause`, `resume`, and `isPaused`.
+
+#### Scenario: Pause and resume
+
+- **WHEN** `pause()` is called
+- **THEN** `isPaused()` returns `true`
+- **AND** `getGameTime()` stops advancing
+- **AND** after `resume()`, `isPaused()` returns `false`
+
+### Requirement: Set game time directly
+
+The system SHALL provide `setGameTime` to override the clock to a specific date.
+
+#### Scenario: Direct time set
+
+- **WHEN** `setGameTime(futureDate)` is called
+- **THEN** `getGameTime()` returns `futureDate`
+
+### Requirement: Scene queries at game time
+
+The system SHALL delegate `getScene` to `UniverseClient.getScene` using the current game time.
+
+#### Scenario: Scene query
+
+- **WHEN** `getScene(observer)` is called while paused
+- **THEN** the query uses the paused game time, not real time
+
+### Requirement: AsyncScheduler integration
+
+The system SHALL wrap `@suaveplan/timing`'s `AsyncScheduler` to drive game time ticks.
+
+#### Scenario: Scheduler usage
+
+- **WHEN** `GamingUniverse` is constructed
+- **THEN** it creates or references an `AsyncScheduler` from `@suaveplan/timing`
+- **AND** `dispose()` stops the scheduler
+
+### Requirement: Event emission
+
+The system SHALL emit events via `@suaveplan/events` for `hourChanged`, `dayChanged`, `seasonChanged`, `sunriseStarted`, `sunsetStarted`, `moonriseStarted`, `moonsetStarted`, and `eclipseStarted`.
+
+#### Scenario: Day change event
+
+- **WHEN** game time advances across a midnight boundary
+- **THEN** a `dayChanged` event is emitted with the new `gameTime` and `dayNumber`
+
+### Requirement: Signal cancellation
+
+The system SHALL pass `AbortSignal` through to `UniverseClient.getScene` and cancel in-flight queries.
+
+#### Scenario: Abort in-flight
+
+- **WHEN** `getScene` is called and the signal is aborted
+- **THEN** the promise rejects with an abort error
+
+### Requirement: Dispose idempotency
+
+The system SHALL provide `dispose()` that stops the clock and cancels all in-flight queries, callable multiple times safely.
+
+#### Scenario: Double dispose
+
+- **WHEN** `dispose()` is called twice
+- **THEN** no error is thrown
+- **AND** the instance is fully shut down after the first call
+
+### Requirement: UniverseClient exposure
+
+The system SHALL expose the underlying `UniverseClient` via a readonly `universe` property.
+
+#### Scenario: Access underlying client
+
+- **WHEN** `gamingUniverse.universe` is accessed
+- **THEN** it returns the `UniverseClient` passed at construction