Playground

Test the companion before anyone else does.

Messages go through the reusable runtime API with profile + context packet + user input.

Ready

Companion: DraftMate · Memory loaded: 5 categories · Rules: 5

Here's the cold open for act one. Does the tone match the rest of the script and the character bible?

Based on the companion profile and the context provided, I'd focus this companion on concise, context-aware guidance. Send a message to use the runtime.

Mock runtime mode — no API key required.

Runtime

Response metadata

Modemock / mock
Estimated usageNo usage yet
ValidationContext packet valid

Context packet

Sent with each message

Companion sourceMock template
Memory sections4 sections attached

Packet JSON

Context preview

{
  "schemaVersion": "1.0.0",
  "sourceApp": {
    "id": "mod-mate-playground",
    "name": "Mod-Mate Playground",
    "version": "0.1.0",
    "environment": "local"
  },
  "projectId": "demo-workspace",
  "activeTool": "playground",
  "currentScreenContext": "User is testing a mock companion inside the Mod-Mate Playground with mock project context only.",
  "selectedText": "The companion should answer using the active profile, visible context packet, and configured guardrails.",
  "selectedEntity": {
    "id": "draftmate",
    "type": "mock-companion-profile",
    "label": "DraftMate",
    "value": "Screenplay & story companion. Tracks beats, characters, and tone across drafts.",
    "metadata": {
      "category": "Writing & Story",
      "status": "Ready",
      "source": "mock"
    }
  },
  "memorySections": [
    {
      "id": "project-facts",
      "label": "Project facts",
      "content": "This is a UI-only preview. No backend, auth, database, or account sync is active yet.",
      "priority": "high",
      "source": "mock-playground"
    },
    {
      "id": "rules",
      "label": "Active guardrails",
      "content": "Never invent missing project facts.\nAsk for missing context before guessing.\nStay in character voice unless explicitly broken.\nCite the source document when quoting.\nRefuse out-of-scope tasks politely.",
      "priority": "normal",
      "source": "builder-defaults"
    },
    {
      "id": "memory-categories",
      "label": "Memory categories",
      "content": "Project facts, Characters, Decisions log, World lore, Open questions",
      "priority": "normal",
      "source": "mock-data"
    },
    {
      "id": "persona",
      "label": "Persona",
      "content": "Writing & Story companion · mock profile",
      "priority": "normal",
      "source": "mock-data"
    }
  ],
  "warnings": [
    {
      "id": "runtime-mode",
      "level": "info",
      "message": "Runtime is set to mock mode. No provider key is required."
    },
    {
      "id": "local-context",
      "level": "warning",
      "message": "Context packet is mock-only and is not persisted or sent to a server yet."
    }
  ],
  "metadata": {
    "runtimeMode": "mock",
    "source": "playground-preview",
    "selectedCompanion": "DraftMate",
    "companionSource": "mock"
  },
  "actionHints": [
    {
      "id": "copy-response",
      "label": "Copy response",
      "kind": "copy-to-clipboard",
      "description": "Future host apps may expose safe response actions."
    },
    {
      "id": "export-to-memory",
      "label": "Export useful detail to memory",
      "kind": "export-to-memory",
      "description": "Future action hint for saving useful facts with confirmation."
    }
  ],
  "createdAt": "2026-01-01T00:00:00.000Z"
}

Prompt

Runtime preview

Send a message to generate a prompt preview.

Warnings

Metadata

Runtime is set to mock mode. No provider key is required.
Context packet is mock-only and is not persisted or sent to a server yet.
Runtime API supports mock and live OpenAI mode.