Security guidance published across multiple outlets warns that LLM output and agent behavior must be treated as untrusted throughout the full application pipeline, not just at the model layer. One report details how identity, authorization, context assembly, templating, tokenization, inference, decoding, parsing, policy checks, and downstream actions can each introduce risk, and says incident response should preserve artifacts such as serialized prompts, truncation decisions, model and tokenizer identifiers, decoding settings, parser results, policy decisions, and executed actions. It also highlights prompt-injection scenarios in which attacker-controlled retrieved content can steer a model toward sensitive actions if application controls are weak.
Separate guidance for generative UI systems says applications should enforce a strict validation boundary with schema checks, render only approved components from a controlled registry, and route any real-world action through an application-owned action registry with authorization and server-side enforcement. In parallel, the open-source Hazmat project aims to contain AI coding agents by isolating them under a separate local account, restricting readable and writable paths, network access, and service access so agents cannot reach secrets such as SSH keys or cloud credentials outside the project workspace. Together, the reports reflect a broader shift toward execution control, evidence preservation, and sandboxing as core defenses for AI-enabled applications and coding agents.

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A demo script described in the reference shows a contained agent session writing a file inside a temporary project while failing to read a private key from the user's real home directory with networking disabled. The comparison reportedly showed one new file in the project and no other files modified.
Hazmat is described as a free open-source tool on GitHub for isolating AI coding agents under a separate account on the user's machine to limit access to sensitive data and credentials. The reference does not anchor when the project was first released.
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