Chore/zod 4 update#4041

Draft

LukeSchlangen wants to merge 21 commits intofirebase:mainfrom

LukeSchlangen:chore/zod-4-update

Commits on Jan 5, 2026

chore(basic-gemini): remove zod-to-json-schema and fix type errors
LukeSchlangen
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chore(model-armor): migrate to zod 4
LukeSchlangen
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chore(vertexai-modelgarden): migrate to zod 4
LukeSchlangen
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chore(next-app): migrate to zod 4
LukeSchlangen
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chore(next-app): remove duplicate lockfile
LukeSchlangen
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refactor: Upgrade TypeScript to 5.5 and Zod to v4, adapting code to new type strictness and schema generation API.
LukeSchlangen
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fix(express): update ContextProvider to use inferred input type
LukeSchlangen
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fix(compat-oai): replace AnyZodObject with ZodObject<any>
LukeSchlangen
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fix(compat-oai): cast defineCompatOpenAIModel result to any
LukeSchlangen
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fix(compat-oai): cast request.config to any to access properties
LukeSchlangen
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fix(compat-oai): cast resolver to any to avoid type mismatch
LukeSchlangen
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fix(compat-oai): cast request.config to any in utils and grok
LukeSchlangen
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fix(anthropic): cast init/resolve returns to any
LukeSchlangen
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fix(evaluators): update judgeConfig to use z.infer<CustomModelOptions>
LukeSchlangen
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fix(mcp): update prompt stream response and render input types
LukeSchlangen
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fix(mcp): fix type errors within mcp plugins
LukeSchlangen
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fix(firestore-retriever): update z.record to zod 4
LukeSchlangen
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