{"record":{"id":"6173d873c9391ea7","repo":"earendil-works/pi","slug":"anyof-must-contain-at-least-one-schema","errorCode":null,"errorMessage":"anyOf must contain at least one schema","messagePattern":"anyOf must contain at least one schema","errorType":"exception","errorClass":"UnsupportedStrictJsonSchemaError","httpStatus":null,"severity":"error","filePath":"packages/ai/src/api/constrained-sampling.ts","lineNumber":65,"sourceCode":"\tif (!isJsonSchemaObject(schema)) return false;\n\tif (schema.type === \"null\" || (Array.isArray(schema.type) && schema.type.includes(\"null\"))) return true;\n\tif (schema.const === null || (Array.isArray(schema.enum) && schema.enum.includes(null))) return true;\n\treturn Array.isArray(schema.anyOf) && schema.anyOf.some((variant) => schemaAllowsNull(variant));\n}\n\nfunction makeJsonSchemaNodeStrict(schema: unknown): void {\n\tif (!isJsonSchemaObject(schema)) {\n\t\tthrow new UnsupportedStrictJsonSchemaError(\"boolean schemas are unsupported\");\n\t}\n\tfor (const key of UNSUPPORTED_STRICT_SCHEMA_KEYS) {\n\t\tif (schema[key] !== undefined) {\n\t\t\tthrow new UnsupportedStrictJsonSchemaError(`${key} schemas are unsupported`);\n\t\t}\n\t}\n\n\tif (schema.anyOf !== undefined) {\n\t\tif (!Array.isArray(schema.anyOf) || schema.anyOf.length === 0) {\n\t\t\tthrow new UnsupportedStrictJsonSchemaError(\"anyOf must contain at least one schema\");\n\t\t}\n\t\tfor (const variant of schema.anyOf) {\n\t\t\tif (isStructuredSchema(variant)) {\n\t\t\t\tthrow new UnsupportedStrictJsonSchemaError(\"object and array unions are unsupported\");\n\t\t\t}\n\t\t\tmakeJsonSchemaNodeStrict(variant);\n\t\t}\n\t}\n\n\tif (schema.items !== undefined) {\n\t\tif (Array.isArray(schema.items)) {\n\t\t\tthrow new UnsupportedStrictJsonSchemaError(\"tuple schemas are unsupported\");\n\t\t}\n\t\tmakeJsonSchemaNodeStrict(schema.items);\n\t}\n\n\tconst isObjectSchema = schema.type === \"object\";\n\tif (schema.properties !== undefined && !isObjectSchema) {","sourceCodeStart":47,"sourceCodeEnd":83,"githubUrl":"https://github.com/earendil-works/pi/blob/4af9d21d3b4d664e4a29fcabfec85171077248e3/packages/ai/src/api/constrained-sampling.ts#L47-L83","documentation":"Error \"anyOf must contain at least one schema\" thrown in earendil-works/pi.","triggerScenarios":"Thrown at packages/ai/src/api/constrained-sampling.ts:65 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Provide at least one subschema in anyOf."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"4af9d21d3b4d664e4a29fcabfec85171077248e3","analyzedAt":"2026-08-24T13:07:14.692Z","schemaVersion":2},"datasetVersion":"2026-08-24T17:17:21.512Z"}