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fix(gemini): convert prefixItems and ensure array items in schema sanitizer

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Co-Authored-By: Claude Code <noreply@anthropic.com>
This commit is contained in:
decolua
2026-09-03 09:05:57 +07:00
parent ac9120fde3
commit f6c59d30b0
1 changed files with 35 additions and 0 deletions
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35
open-sse/translator/formats/gemini.js
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@@ -14,6 +14,8 @@ export const UNSUPPORTED_SCHEMA_CONSTRAINTS = [
"uniqueItems", "contains", "uniqueItems", "contains",
// 2020-12 keywords with no Gemini equivalent // 2020-12 keywords with no Gemini equivalent
"unevaluatedProperties", "unevaluatedItems", "contentSchema", "unevaluatedProperties", "unevaluatedItems", "contentSchema",
// Tuple-array keywords; converted to items first, leftovers stripped
"prefixItems", "additionalItems",
// Claude rejects these in VALIDATED mode // Claude rejects these in VALIDATED mode
"default", "examples", "default", "examples",
// JSON Schema meta keywords // JSON Schema meta keywords
@@ -308,6 +310,37 @@ function ensureObjectType(obj) {
for (const v of Object.values(obj)) if (v && typeof v === "object") ensureObjectType(v); for (const v of Object.values(obj)) if (v && typeof v === "object") ensureObjectType(v);
} }
// Convert prefixItems (tuple validation) to items — Gemini cannot express tuples,
// and a type:"array" schema without items is rejected with "missing field"
function convertPrefixItems(obj) {
if (!obj || typeof obj !== "object") return;
if (Array.isArray(obj.prefixItems) && obj.prefixItems.length > 0) {
const variants = obj.prefixItems.filter(s => s && s.type !== "null");
if (!obj.items && variants.length === 1) {
obj.items = variants[0];
} else if (!obj.items && variants.length > 1) {
obj.items = { anyOf: variants };
}
delete obj.prefixItems;
}
for (const value of Object.values(obj)) {
if (value && typeof value === "object") {
convertPrefixItems(value);
}
}
}
// Gemini requires items on every type:"array" schema — fill a permissive placeholder
function ensureArrayItems(obj) {
if (!obj || typeof obj !== "object") return;
if (obj.type === "array" && !obj.items) {
obj.items = { type: "string" };
}
for (const v of Object.values(obj)) if (v && typeof v === "object") ensureArrayItems(v);
}
// Clean JSON Schema for Antigravity API compatibility - removes unsupported keywords recursively // Clean JSON Schema for Antigravity API compatibility - removes unsupported keywords recursively
export function cleanJSONSchemaForAntigravity(schema) { export function cleanJSONSchemaForAntigravity(schema) {
if (!schema || typeof schema !== "object") return schema; if (!schema || typeof schema !== "object") return schema;
@@ -321,11 +354,13 @@ export function cleanJSONSchemaForAntigravity(schema) {
// Phase 2: Flatten complex structures // Phase 2: Flatten complex structures
mergeAllOf(cleaned); mergeAllOf(cleaned);
convertPrefixItems(cleaned);
flattenAnyOfOneOf(cleaned); flattenAnyOfOneOf(cleaned);
flattenTypeArrays(cleaned); flattenTypeArrays(cleaned);
// Phase 2.5: Infer missing type=object when properties exist (Gemini requirement) // Phase 2.5: Infer missing type=object when properties exist (Gemini requirement)
ensureObjectType(cleaned); ensureObjectType(cleaned);
ensureArrayItems(cleaned);
// Phase 3: Remove all unsupported keywords at ALL levels (including inside arrays) // Phase 3: Remove all unsupported keywords at ALL levels (including inside arrays)
removeUnsupportedKeywords(cleaned, UNSUPPORTED_SCHEMA_CONSTRAINTS); removeUnsupportedKeywords(cleaned, UNSUPPORTED_SCHEMA_CONSTRAINTS);