Browser AI

The Browser Stops Being Just a Client
What Does Built-In Actually Mean?
Build the Smallest Browser AI Observatory
From Prompt Demo to AI Debugger
One Runtime, Several Interfaces
Summarization Is a Contract
Writing, Rewriting and Proofreading Are Different Operations
Language Detection Is a Decision, Not an Answer
A Session Is Not a Stateless Function
When the Context Window Fills
Cold Starts, Warm Runs and Real Latency
The Browser Manages the Model
A Resolved Promise Is Not a Correct Answer
Evaluate the Feature, Not the Demo
When Local Is Not Available
Structured Output Is Still Model Output
From Buttons to Capabilities
Expose the First WebMCP Tool
Tool Choice Is a Behavioral Problem
Untrusted Text Meets Executable Authority
Put a Human at the Authority Boundary
The Browser as a Personal Policy Engine
Build an AI-Origin Content Filter
Build Browser AI Lens: The User-Owned Intelligent Browser
Appendix A — Browser AI Field Guide: Setup, APIs, States, Diagnostics and Configuration