Ollama structured output guide

Ollama gives you local structured outputs. You still need guardrails.

Ollama's structured output support is a strong local building block, but teams still need validation, portability checks, and consistent behavior when the same schema also targets hosted providers.

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Schema Gateway move

Ollama supports structured outputs with JSON schema, but local pipelines still benefit from repair, validation, and provider-portable schema checks. Schema Gateway adds that reliability layer.

schema-gateway validate --schema ./schema.json --payload ./payload.json --provider ollama

What breaks

Local models still drift, especially when prompts and schema complexity grow.
A schema that works in Ollama may still need edits for hosted providers.
Teams often need one linting layer across local and hosted inference.

What Schema Gateway fixes

Normalize malformed tool payloads before they hit your application code.
Use the same schema portability report across Ollama and hosted APIs.
Keep local validation free while buying shared enforcement only when needed.

Official references

Ollama structured outputs