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Safety-Critical AI · Private client

Safety-Critical AI for a Regulated Practice

Healthcare client, details withheld

Challenge

Assist a professional in real time in a setting where one component of the system is safety-critical and a wrong output can cause harm.

My role

Architecture and build across the assistant, the safety layer and the data-retention model, working under the client's compliance regime.

Evidence

Engagement in progress. Further detail available on request, subject to client approval.

Some products contain one component that is different in kind from everything around it: if it is wrong, someone can be harmed. The engineering question is not how to make that component clever, it is how to make it predictable, explainable and fast, and how to keep everything clever firmly outside it.

The principle I work to is a hard split between a safety layer and a support layer. The safety layer is deterministic, rule-based and auditable, with no language model anywhere in its decision path, because a model is non-deterministic, cannot be explained to a regulator after an incident, adds latency that a real-time path cannot afford, and introduces an injection surface where the input itself could suppress an alert. The support layer, where a wrong answer is an inconvenience rather than a harm, is where a model earns its place, with a human reviewing before anything acts.

The same discipline runs through data handling. In a regulated setting the retention model is a design decision rather than a configuration detail, and infrastructure ownership sits with the client's organisation from day one so that the legal data controller is unambiguous and closing an engagement means revoking access rather than migrating credentials.

This engagement is live and the client's product, architecture and compliance specifics are not mine to publish. I am happy to talk through the approach in a call.

Outcomes

  • Safety-critical path built with no LLM dependency, auditable rule by rule
  • Deterministic detection fast enough for a real-time window
  • Automated test gate blocking release on any safety-path regression
  • Retention and data-controller model designed for the client's regime

Stack

LLM integrationSpeech-to-textNext.jsSupabaseTypeScriptHealthcare compliance

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