Random Fantasy Border Checkpoint Plan Generator

Description

Place fictional checkpoints on cross-realm caller links and expand supplied permission templates; exact sampling without replacement, not immigration or enforcement advice.

Worldbuilding fixtures describe an invented setting through supplied entities and explicit relations. A reproducible arrangement can support games or writing exercises while keeping constructed history and geography separate from factual claims about the real world.

Place fictional checkpoints on cross-realm caller links and expand supplied permission templates; exact sampling without replacement, not immigration or enforcement advice.

When to use this tool

Use this generator to create reproducible fantasy border checkpoint plan cases from the supplied model or bank. Inspect the returned evidence before using cases in a test or exercise.

How to use the tool and how it works

Supply regions, links, checkpointCount, permissionTemplates in the field shapes below. Set seed when you need an explicit replay.
Run the tool and correct any input error. For generated controls, distinguish a successful fixture containing an invalid case from failure to generate the fixture.
Read checkpoints, ordinaryLinks, componentCount, fictional. Use the conventions below. Keep answer-bearing fields separate when presenting an exercise.

Filter region links to crossings between different realm IDs and sample distinct checkpoint edges. Expand a supplied permission template with the endpoint realms; retain all unselected links as ordinary links and report components of the original network.^[1]

Input field	Meaning and units	Accepted input
regions	Regions	Required. Array of Object; no unknown keys.; minimum items 1; maximum items 16.
regions[].id	Literal identifier used independently of display labels.	Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 64.
regions[].realmId	Realm Id	Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 64.
links	Links	Required. Array of Object; no unknown keys.; minimum items 0; maximum items 64.
links[].from	From	Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 64.
links[].to	To	Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 64.
checkpointCount	Checkpoint Count	Required. Safe integer; minimum 0; maximum 64.
permissionTemplates	Permission Templates	Required. Array of Object; no unknown keys.; minimum items 1; maximum items 16.
permissionTemplates[].id	Literal identifier used independently of display labels.	Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 64.
permissionTemplates[].text	Text	Required. Text; maximum UTF-16 length 1024.
seed	Optional numeric seed; takes precedence over context randomness. Without either, use the fixed tool.io default seed.	Optional. Safe integer.

Output field	Interpretation	Returned shape
checkpoints	Checkpoints	Required. Array of Object; no unknown keys.; minimum items 0; maximum items 64.
checkpoints[].id	Literal identifier used independently of display labels.	Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 64.
checkpoints[].from	From	Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 64.
checkpoints[].to	To	Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 64.
checkpoints[].fromRealm	From Realm	Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 64.
checkpoints[].toRealm	To Realm	Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 64.
checkpoints[].templateId	Template Id	Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 64.
checkpoints[].permission	Permission	Required. Text; maximum UTF-16 length 131072.
ordinaryLinks	Ordinary Links	Required. Array of Object; no unknown keys.; minimum items 0; maximum items 64.
ordinaryLinks[].from	From	Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 64.
ordinaryLinks[].to	To	Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 64.
componentCount	Component Count	Required. Safe integer; minimum 1; maximum 16.
fictional	Fictional	Required. Boolean; exactly true.
randomness	Replay source and normalized 32-bit seed, or null seed for an advancing context source.	Required. Object; no unknown keys.
randomness.seed	Optional safe-integer replay seed; normalization and precedence are explained below.	Required. Safe integer. or Null.
randomness.source	Source	Required. Text; one of "context", "seed".

An explicit safe-integer seed takes precedence over injected context randomness and is normalized to an unsigned 32-bit integer. With no seed and no context source, replay uses the fixed tool.io default seed. A context source must return finite values from zero inclusive to one exclusive; its advancing state must be retained separately. randomness records the source and normalized seed, or null for context. These generators are not cryptographic random sources.

json

{
  "input": {
    "regions": [
      {
        "id": "a",
        "realmId": "north"
      },
      {
        "id": "b",
        "realmId": "south"
      },
      {
        "id": "c",
        "realmId": "south"
      }
    ],
    "links": [
      {
        "from": "a",
        "to": "b"
      },
      {
        "from": "b",
        "to": "c"
      }
    ],
    "checkpointCount": 1,
    "permissionTemplates": [
      {
        "id": "pass",
        "text": "Pass {fromRealm} to {toRealm}"
      }
    ],
    "seed": 42
  },
  "output": {
    "checkpoints": [
      {
        "id": "checkpoint-1",
        "from": "a",
        "to": "b",
        "fromRealm": "north",
        "toRealm": "south",
        "templateId": "pass",
        "permission": "Pass north to south"
      }
    ],
    "ordinaryLinks": [
      {
        "from": "b",
        "to": "c"
      }
    ],
    "componentCount": 1,
    "fictional": true,
    "randomness": {
      "seed": 42,
      "source": "seed"
    }
  }
}

Limitations and assumptions

Unselected cross-realm links remain ordinary in this model. Permission text is fictional worldbuilding, not real border law, travel permission, or immigration advice.
A replay requires the same complete input and implementation. The stated sampling convention applies within its eligible space. A finite draw does not exhaust all possible outputs; repeats remain possible unless a distinct-selection rule is explicit.
The field tables state structural bounds; cross-field constraints and bounded search or output budgets also apply. Unknown keys are rejected where the object contract disallows them. Input errors are distinct from null fields and deliberate invalid controls in a successful output.

Alternative or Complementary methods

For a supplied example, inspect the returned construction or delegated check directly. To evaluate a consumer, also test cases chosen for its own boundaries; a generated finite corpus does not establish exhaustive coverage.

References

Tool behavior and example: Random Fantasy Border Checkpoint Plan Generator — tool.io

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