# Defend your AI features against prompt injection: production patterns that hold

Features powered by language models — support copilots, document question-answering, triage assistants — are genuinely delightful when they work. They read messy human input and produce useful structured output, which is exactly why they change what your app can do. That same strength is the threat model: every one of these features reads untrusted input by design. Prompt injection defenses are not a hardening sprint for later. They ship with the feature, or the feature ships without them.

The working definition is simple.

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*This is an excerpt. Read the full post at [otf-kit.dev/blog/prompt-injection-defenses-production](https://otf-kit.dev/blog/prompt-injection-defenses-production) — full-stack kits your AI coding agent can actually ship to production. [Browse the kits →](https://otf-kit.dev)*