Product behaviours — building and inhabiting graph-worlds

Owns the repeated product behavior. Positioning owns the message; the World concept contract owns the stable future concept. Existing feature specs own shipped interaction details.

Meridians has one Domain substrate, two games, and a directed presentation layer:

1. Build and orient — extraction and the Program make System, World, Fate, canon, and topology inspectable.
2. Explore through Scenario — work at a branch's frontier, play possibilities, and develop the raw world.
3. Stage for an audience — compose authorised state, reusable assets, performances, sound, and variable cameras into a fixed audiovisual experience without writing presentation choices into canon.
4. Prototype continuation in text — run abstract World forms in parallel to test per-seat context, partial information, tools, resources, cadence, and Will from several sources at lower cost.
5. Inhabit through World — deploy a preset or custom parallel world with situated human and agent seats.
6. Inject Will — each seat receives its own context and chooses natural-language or manual MCP tool calls during the World's active cadence.
7. Return to what changed — Stories and the Studio reveal world movement through appropriate cameras; the canonical record remains the source of truth.

World's precise phase loop is deliberately open. The universal behavioral commitments are smaller:

• every World is turn-based and clocked;
• closed hours and weekends can be part of play;
• constant agent availability must not become the price of human participation;
• a seat may represent a character, location, artifact, or another Domain-authorized entity;
• context and available tools are situated per seat;
• information must travel according to the Domain's topology and communication regime;
• presets make play immediate while Domain settings permit different games;
• pause, conclusion, migration, and upgrade are valid lifecycle outcomes;
• metrics name the world, ruleset, perspective, interval, and limits they measure.

The felt success is a world that acquired history through plural Will—not another generated answer or a score detached from the conditions that produced it.