W88 — The Simulation Kind Nobody Outside the Package Can Use

[The-Running-Dev]

W88 — The Simulation Kind Nobody Outside the Package Can Use

Lets a content repository actually write Life in the Fast Lane, and lets a host render it. Today the simulation kind is one you can register and cannot author: the package exports simulationKind and nothing else about it — not the campaign builder, not the source types it takes, not the campaign, state, view or outcome types a host must compile against.

Done when

• W88.1 buildSimulationCampaign and every *Source type in src/engine/src/kinds/simulation/source.ts are exported from @the-running-dev/game-engine/authoring; SimulationCampaign, SimulationKindState, SimulationView, PublicWorldState, SimulationOutcome, ActionType, GameAction and WeeklyActionPlan are exported from the package root.
• W88.2 consumer-smoke builds a simulation campaign from source through the subpath and types a SimulationView through the root, resolving both from the packed tarball. Deleting one of the new exports fails the smoke build, verified by deleting one.
• W88.3 The subpath stays closed against published content: W74.7's enumeration check passes with the new names in its committed list, and no stable-life* or bulgaria-stable-life builder or campaign id becomes reachable through either surface.
• W88.4 §19's export sentence names the simulation builder and source types and states the author-time/runtime split this unit applies.
• W88.5 A test asserts the root exports no simulation authoring value.
• W88.6 npm run typecheck, npm run lint and npm test pass from src/engine/; install:engine, build and smoke pass from consumer-smoke/; ./build/Test-Documentation.ps1 passes.

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Agent instructions

Run /slice W88.

• Scope and criteria: design/30-slices.md § W88 @ 32b1616
• Signatures: design/20-contract.md §19
• Out of scope here: moving buildWorldGraphCampaign or the story-graph types to match; exporting any campaign; the contract prerequisites (P1-P7) listed above W88 in design/30-slices.md

Stop conditions and procedure: .claude/commands/slice.md. Not restated here.

[The-Running-Dev]

All six criteria verified against main at c8c2e29: implementation already landed in #367 (merged 2026-08-23), and the export-split contract text in #372's reconcile. Re-ran every gate on main today — typecheck, lint, test (1174 passing), consumer-smoke install/build/smoke, and Test-Documentation.ps1 — all pass. No new implementation was needed; this closes a tracker-sync gap, not new work.