Software Neural Browser

Choose the scope before the stack

A browser companion, a standalone application, and a browser-engine project imply different amounts of work. Start with the problem rather than assuming a new engine is necessary. A selected-passage assistant can be a useful architecture exercise without becoming a complete browsing platform.

Chrome documents a side-panel interface for extensions. That is one possible surface for a companion workflow, not a universal compatibility promise. Page access, processing, storage, and operational support remain separate implementation questions.

Draw the data path

For a proposed prototype, separate the page, the interface, the processing component, and any external service. Name every field transferred between them. A selected excerpt is data; the user's request is an instruction; a generated response is output to inspect.

Do not turn model output into executable markup or an unrestricted command. Start with a constrained draft and a visible source reference. If the prototype later needs actions, define those permissions separately instead of allowing the reading feature to accumulate authority by accident.

Make unavailable states part of the design

A changed tab, an empty selection, a canceled request, and an inaccessible service should have understandable outcomes. Keep the original task visible and avoid showing a late result as though it applies to a newly selected source.

A demonstration with fixed example responses can test layout, but it does not establish live model quality. Mark the boundary clearly during testing. This site's articles describe implementation plans; no model endpoint, extension download, or account service is implied.

Evaluate what the user can inspect

Test whether a reader can understand the input scope, find the supporting passage, recognize an unsupported answer, and cancel an operation. Include awkward documents and failed requests in the test set. A clear error path is part of the product, not a concession to an unfinished interface.

Use the extension guide for a detailed permission-first plan. Then examine vector retrieval and local-versus-remote processing only where the task needs them. Each added component should have a purpose, a boundary, and its own evaluation questions.