CultLib/contracts/cultnet/cultnet.error.schema.json
Meta Vens b7d77b708d Fix batch 4 (R-X, S-4/S-10): the error schema matches the wire, and the validator refuses a keyword it does not implement
CultNetErrorMessage is a MessagePack-CSharp map-mode object, so every
declared key is written on the wire, nil included - the same fact R-S
already established for the raw document header. cultnet.error.schema.json
was missing routingHint entirely and typed code/details as always-present
non-null values; Soul's P7 found real bytes failing it on exactly this.
routingHint, code and details are now `required`, with nullable types
matching CultNetErrorMessage/CultNetErrorDetails. A new test decodes real
bytes for all four refusal codes (selection_invalid, cursor_stale,
cursor_invalid, reference_outside_target) against the schema.

MiniJsonSchemaValidator:
- implements minimum, maximum, maxLength and maxItems, which were declared
  in committed schemas (fieldPredicate's number pattern, selection.limit,
  ...) but silently never checked;
- anchors `pattern` to a full match (Index==0 && Length==value.Length)
  instead of Regex.IsMatch's "search anywhere", so .NET's `$` (which,
  unlike ECMA-262's, matches immediately before one trailing newline even
  without RegexOptions.Multiline) can no longer let e.g. "5\n" pass a
  schema author wrote as "exactly one digit";
- refuses a schema node that uses a keyword this validator gives no
  constraint semantics to, instead of silently ignoring it. Running every
  committed contracts/cultnet/*.schema.json schema through this found 12
  such uses, none reached by any existing test: `allOf`/`if`/`then`/`else`
  in cultnet.database-change-raw.schema.json, and `uniqueItems` (six
  places) plus one `anyOf` in the cultmesh.verse-catalog-*.schema.json
  pair. contentEncoding, $schema/$id/$defs/title/description/default and
  the x-cult-runtime-type vendor extension are treated as metadata with no
  constraint semantics to implement, not refused.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
2026-09-22 21:12:23 +02:00

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{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"$id": "https://github.com/GameCult/CultLib/contracts/cultnet/cultnet.error.schema.json",
"title": "CultNet Error Message",
"description": "R-X (docs/cultnet-selection-cut.md, fix batch 4): CultNetErrorMessage is a MessagePack-CSharp map-mode object, so every declared key is written on the wire, nil included - routingHint, code and details are `required` here the same as cultnet.raw-document-header.schema.json's nullable fields, not optional just because a given refusal leaves them null.",
"type": "object",
"required": [
"schemaVersion",
"error",
"routingHint",
"code",
"details"
],
"additionalProperties": false,
"properties": {
"schemaVersion": { "const": "cultnet.error.v0" },
"error": { "type": "string", "minLength": 1 },
"routingHint": {
"description": "Optional shard routing detail for an authority failure. Null for every selection/cursor refusal code (R-N).",
"type": ["object", "null"],
"additionalProperties": false,
"required": ["shard", "reason"],
"properties": {
"shard": { "type": ["object", "null"] },
"reason": { "type": "string" }
}
},
"code": {
"description": "Machine-readable refusal code (R-N). Additive: a v0 peer that does not know this field ignores it.",
"type": ["string", "null"],
"enum": [null, "selection_invalid", "cursor_stale", "cursor_invalid", "reference_outside_target"]
},
"details": {
"description": "Code-specific structured detail (R-N). Every field is populated only for the code that defines it; the others are null, not omitted.",
"type": ["object", "null"],
"additionalProperties": false,
"required": ["field", "value", "asOf", "current"],
"properties": {
"field": { "description": "selection_invalid: the selection field that failed.", "type": ["string", "null"] },
"value": { "description": "selection_invalid: the offending value, when there is one string worth naming.", "type": ["string", "null"] },
"asOf": { "description": "cursor_stale: the cursor's own minted asOf.", "type": ["integer", "null"], "minimum": 0 },
"current": { "description": "cursor_stale: the answering server's current asOf.", "type": ["integer", "null"], "minimum": 0 }
}
}
}
}