Building well
The gap between an AI demo and a useful tool

A demo shows that something is possible. A working business tool needs to show that it is useful under the conditions your team actually encounters.
Test beyond the happy path.
Real inputs are incomplete, inconsistent, and occasionally contradictory. Build a set of examples that includes ordinary work and the awkward cases people already know about.
Decide which mistakes are tolerable, which require review, and which should stop the workflow. A polished interface cannot substitute for knowing how the system behaves.
Make the boundaries visible.
A document assistant should make it easy to inspect the sources behind an answer. A drafting tool should make it clear that its output needs review. A workflow should show which steps have completed and where it needs human attention.
People need enough context to judge the result, rather than being asked to trust a confident-looking answer.
Give the tool only the access it needs.
Decide what information the tool may read and what actions it may perform. Start with limited access and avoid connecting actions that the initial use case does not require.
Content inside an incoming message or document should not automatically become an instruction to take an action. Keep trusted workflow instructions and external input separate, and validate proposed actions before execution.
Account for operating the system.
A useful plan names the person who owns the tool, the services it depends on, and the ongoing costs. It also covers how failures are noticed and how the team can return to the previous process.
Changes to models, integrations, or business rules can change behavior. Keep representative examples so improvements and updates can be checked against the same expectations.
Finish with a handoff people can use.
Documentation should explain how to complete the task, what to review, what to do when something fails, and who controls the relevant accounts.
The delivery is not just code. It is a tool that someone can operate, evaluate, and make an informed decision about keeping.